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Series 12134A/12135A/12136A Recovery/Recycling/Recharging Unit

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2. gt SCHRAEDER 24 l 24 eas GAS 05 7 c 3 1 5 2 MANUALLY CHANGED FROM R 12 TO 134a SLIDING DOOR TO EXPOSE R 12 FITTINGS OR 134a FITTINGS BUT NEVER BOTH AT THE SAME TIME Com 34 Rec 19 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Flow Diagram R 12 Recycling SCHRADER CORE 24 71 25 5 gt 23 LIQUID 34 3 PURGE cas 24a 3 MANUALLY CHANGED 34a FROM R 12 TO 134a SLIDING DOOR TO EXPOSE FITTINGS BUT NEVER BOTH R 12 FITTINGS OR 134a AT THE SAME TIME Com 12 Rcy 20 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Flow Diagram R 134a Recycling Gas 25 Di PURGE SCHRADER CORE 24 CONNECTIONS 34a MANUALLY CHANGED FROM R 12 TO 134a SLIDING DOOR TO EXPOSE R 12 FITTINGS FITTINGS BUT OR 134a NEVER BOTH AT THE SAME TIME Com 34 Rcy 21 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Vacuum Flow Diagram 1 4 1 2 FLARE ACME 194a HIGH 3 3 s gt INLET INLET gt gt Low 3 Low3 SCRADER CORE TANK CONNECTIONS MANUALLY CHANGED PURGE PURGE FROM R 12 TO 134a SLIDING DOOR TO EXPOSE R 12 FITTINGS OR 134a FITTINGS BUT NEVER B
3. Check for suction at the intake of the vacuum pump If thereis no suction replacethe vacuum pump Remove the shroud and look for loose wires to the vacuum solenoid Check for power 110 220 volts to the vacuum solenoid If power is present rebuild the solenoid or inspect for debris Verify that the suction line strainer is not plugged Check the low side gauge for proper operation and calibration 41 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual UNIT WILL NOT EVACUATE PUMP IS OFF 42 U 1 2 TROUBLESHOOTING Display There is 25 psi greater at the vacuum pump protection switch recover before evacuating Unplug the switch If U HI goes out check for pressure at the sensor If there is none replacethe sensor If U HI remains on replace the main board Timer Counting Down 1 Verify that the vacuum pump is plugged in 2 Check the power 110 220 volts at the vacuum pump receptacle If thereis proper power 110 220 volts check that the vacuum pump is not overfilled with oil If it is drain the oil from the vacuum pump then start and refill the vacuum pump properly If there is not replace the vacuum pump If there is not proper voltage remove the cover and look for loose wires Check for voltage to the coil of the vacuum pump relay If thereis no voltage inspect the wires between the vacuum pump re
4. RA19258 Solenoid Rebuild Kit 19198 R 12 or RA19242 R 134a Auto Air Purge Device After therecyding sequence has been running for 60 seconds a timer pro gramed in the main board opens the normally closed solenoid of the selected refrigerant type allowing pressure to enter the lower cavity of the air purge device When the pressure on the lower cavity exceeds the pressure of the upper cavity by 7 psi or more a valve inside the device opens to release the air pressure out of the cavity When the pressures come within 3 psi of each other the device stops purging ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual Component Descriptions CHARGING 26 27 35 41 39 17506 R 12 or 34750 R 134a Refillable Tank Stores refrigerant RA19311 R 12 or RA19306 R 134a 36 Blue Tank Hose Allows flow from the liquid side of the tank tothe liquid solenoid 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit 17773 Replacement R134a Quick Seal O Ring 40352 Schraeder Core Package of six 6 replacement Schraeder valves 107021 Liquid Line Strainer Filters liquid coming from the blue tank hose before going to the liquid solenoid This strainer is a filter screen that is installed between the liquid solenoid and the bulkhead fitting See page 32 for details RA19006 RA19088 220 volt Liquid Solenoid Allows flow to
5. are all open receiving power This block assembly allows the vacuum pump to remove any moisture or air from the unit to change from one refrigerant type to the next Note RA19258 Solenoid Rebuild Kits are available for all of the solenoids in this manifold block RA19236 Check Ball with Spring RA19258 Vacuum Solenoid Rebuild Kit Normally closed solenoid preventing flow to the vacuum pump during recovery or charging 111877 Vacuum Hose Provides flow from the vacuum solenoid to the intake of the vacuum pump 40084 Replacement Hose Gasket RA15425 RA15428 220 volt Vacuum pump A 6 CFM two stage rotary vane pump designed to pull moisture and air from an A C system In the self dearing mode the pump pulls a vacuum on the recovery unit 13 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual Component Descriptions ELECTRICAL 10 RA19266 Vacuum Pump Protection Switch 13 18 20 14 A normally open sensor that doses when pressure greater than 25 psi is present in the system If the pressure is less then 25 psi in therecovery mode the display reads CH P In the vacuum mode the display reads U HI if the pressure is 25 psi or greater in the A C system This indicates that a recovery procedure must be performed before attempting to vacuum RA17328 Vacuum Sensor A normally dosed sensor that sends a signal to the main board when a 17 vacuum has been reached in th
6. 12134PC 29 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Components Specifications ADD Therecovery tank has less than 8 Ibs of CH P Lessthan 25 psi at inlet of machine refrigerant left or is beginning the add process CAL Calibratethe scale CH F Changethefilter drier CL L Low side clearing routine in progress CL R Clearing changing refrigerant type CON Continuous the vacuum pump will run conti nuousl y CPL Complete cycle process is finished FIL Filter drier change out process FULL Refrigerant tank full HI P High pressure internal unit pressure 15 above 435 psi OIL Change the vacuum pump oil to reset press SHIFT RESET and ENTER at the same time while OIL is being displayed U HI High pressureto vacuum pump SCAL Scale problem scale may be broken or disconnected or tank weight has exceeded 80 pounds 36 kilograms 99LB maximum amount displayed during recovery is 99 pounds or 99 kilograms reset the unit ROBINAIR ROBINAIR CLOSED CLOSED OPEN 4 RA19279 RA19319 metric Low Side Gauge 35 RA17577 Moisture ndicator 5 RA19044 Low Side Manifold Valve 44 RA40994 RA17135 220 volt Main Power Switch 8 RA19280 RA19318 metric High Side Gauge 45 RA19301 RA19246 220 volt Main Board 9 RA19044 High Side Manifold Valve 47 RA19253 Keypad 30 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95
7. 12 13 14 CPL HOLD At this time move the sliding lockout panel to the position of the next desired refrigerant type Press SHIFT RESET The unit is now locked in for that refrigerant type and the display reads 15 00 program vacuum minutes Turn off the unit s power Disconnect the wires from the exposed liquid solenoid Turn on the unit s power The display should match the same refrigerant type as the position of the sliding lock out panel Press SHIFT RESET until Progam appears onthedisplay Install a low side gauge of a hand held manifold to the liquid fitting on the back of the unit Close the low side valve on the hand held manifold Start manual recycling by pressing SHIFT RESET and 1 at the same time The low side gauge should not pull into a vacuum If it does clean or rebuild the liquid solenoid of the selected refigerant type Turn off the unit and reconnect all wires and hoses Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Labor Rates Robinair authorizes a 13 4 hour charge to trouble shoot and to complete a full function test on units that are covered under factory warranty includes leak testing The authorized time for parts replacement is 15 minutes per part Some items require an additional amount of time to facilitate installation These items and their times are listed below If repairs are estimated to exceed three hours prio
8. A normally closed sensor designed to open when a 17 vacuum is reached in the inlet manifold RA18760 System Oil Separator Performs three functions Internal heat causes incoming saturated vapor to evaporate This is important to insure that liquid enters the compressor and that oil droplets contained in the refrigerant drop out in theseparator Thethird function will be discussed later RA19291 Oil Drain Valve Allows the oil removed from the system to be drained when recovery is complete The same amount of oil should be returned during charging Note It is very important that the oil drain procedure be done after each recovery RA17419 Oil Drain Bottle 34430 Filter Drier Removes moisture acid and oil from the refrigerant 40084 Replacement Hose Gasket RA19302 RA19314 220 volt Compressor Converts a low pressure entering gas into a high pressure exiting gas This is a 1 3 horse power oil less compressor To help eliminate vibration thisis a hose plumbed compressor with flare connections on the unit end of the hose Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Component Descriptions 18 RA17416 RA17516 220 volt Fan Assists in cooling the compressor during normal operation 19 RA19331 RA19327 220 volt High Side Diversion Solenoid A three way normally closed solenoid During normal operation the refrigerant passes through to the system oil separator ports
9. Blue Hose Double Quick Seal Low side service hose to the vehide 18180 Replacement Quick Seal O Ring 40300 Quick Seal Repair Kit 40352 Schraeder Core Package of six 6 replacement Schraeder valves RA19279 RA19319 metric 23 4 Low Side Gauge Used to read pressure entering the low side hose RA19257 23 4 Replacement Lens 19044 Low Side Manifold Valve Allows flow from the low side hose to the center manifold port 18191A R 134a High Side Coupler red actuator larger 1 0 Allows access to the high side on an R 134a system RA19115 Replacement Front O Ring Only RA19328 R 134a High Side Hose Provides flow from the high side coupler tothe high side port of the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring RA19308 R 12 96 Red Hose Double Quick Seal High side service hoseto the vehicle 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit 40352 Schraeder Core Package of six 6 replacement Schraeder valves RA19280 RA19318 metric 23 4 High Side Gauge Used to read pressure entering the high side hose RA19257 23 4 Replacement Gauge Lens 9 10 11 41 12 13 14 15 RA19044 High Side Manifold Valve Allows flow from the high side hose to the center manifold port RA19266 Vacuum Pump Protection Switch A normally open sensor that closes when
10. Components Specifications 12134NO 12134HD 117230 38A 114222 12134505 12134 RA19236 RA19236 12134MA 12134EX ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Components Specifications SCHRAEDER CORES 117234 117235 2 107021 FILTER SCREEN ONE INSTALLED AS SHOWN INTO THE INLET SIDE OF EACH SOLENOID CUPPED END INSERTED 101612 FIRST 2 112870 32 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 BROWN FROM SWITCH amp RELAY BROWN FROM COMPRESSOR BLUE FROM SWITCH amp RELAY BLACK FROM START RELAY BROWN FROM SWITCH amp RELAY BLACK JUMPER TO VAC PUMP OUTLET BLUE FROM gt SWITCH amp RELAY WHITE JUMPER TO PUMP OUTLET 12134RL 12134VS m P Components Specifications E 70 m 0 5 gt gt lt AV WANDVA YELLOW The system relay is used to energize the compressor or vacuum pump and allow the sensors to shut the unit off The relay has two sets of contacts which close when the coil is energized Coil contacts 0 and 1 when energized they should have power 110 220 volts across the terminals While voltage is applied the coil forms a magnetic field pulling the 2 and 4 6 and 8 contacts together The 2 and 4 and the and 8 contacts have power supplied to oneterminal of the pair When the coil is energized it closes the contacts and supplie
11. RA17577 Moisture Indicator References the moisture content of the refrigerant being recycled Pale yellow indicates wet light mint green indicates dry During recycling the moisture indicator is normally filled with liquid refrigerant and warm tothe touch RA19288 Manifold By Pass Check Valve 1 8 MPT x 1 4 MFL Prevents flow during the recovery recycle and charging mode to the manifold bypass solenoid RA19316 Expansion Valve and Tube Converts incoming liquid refrigerant into a low pressure saturated vapor The calibration of the expansion valve can be checked at the oil drain port with a pressure gauge Thetolerance of the valveis 30 to 40 psi and minimum recyding timeis five minutes before checking 41 37 13 14 15 16 17 RA19320 RA19321 220 volt Manifold Assembly Block assembly that houses the recovery recycling charging and vacuum solenoids this manifold also houses the vacuum sensor and three check balls the recycling mode solenoids 12 Recovery 30 Vacuum and 39 Charging are all closed no power supplied Note RA19258 Solenoid Rebuild Kits are available for all of the solenoids in this manifold block RA19236 Check Ball with Spring RA19258 Recycling Solenoid Rebuild Kit A normally closed solenoid that prevents the flow of refrigerant into the system oil separator while the unit is turned off or any mode other then recycling RA17328 Vacuum Sensor
12. Service Manual Theory of Operation and Safety Precautions The Series 12134A recovery recycling evacuating and recharge units are designed for R 12 and R 134A refrigerant only These units are UL approved and meet SAE J 1770 standards These units began production in March of 1995 The date code and serial number can be found on a white tag on the back of the unit near thetank DEPRESSURIZING THE UNIT 1 Disconnect the black lead wire from the compressor relay 2 Connect the 96 blue low side hose to the oil drain port if the unit the R 134A setting you must use a low side coupler connector and tee supplied to you part numbers 16301 and 15554 3 Open both the high and low side manifold valves on the unit s control panel 4 Open the oil drain valve 5 Closethe liquid and vapor valves on the 50 Ib tank 6 Disconnect all hoses from the 50 Ib tank 7 10 11 12 13 Connect the red vapor tank hoseto the high side of a hand held manifold gauge set Connect the blue liquid tank hose to the low side of a hand held manifold gauge set Connect the yellow center port of the hand held manifold gauge set to the inlet of a prepared recovery unit for R 12 use a 17650 R 134a use a 34650 Open the high and low side valves on the hand held manifold gauge set Turn on the unit being serviced 12134A Press SHIFT RESET to access the program mode Press SHIFT RESET and 1
13. sensor designed to shut the unit off if the discharge pressure reaches 435 psi Pressure is detected through the orifice in the base of the sensor In the normal setting less than 435 psi on orifice the 1 and 3 contacts are closed When 435 psi is introduced to the orifice the pressure forces up on the drive pin which forces the center contacter to disengage the 1 and 3 contacts and engage the 1 and 2 contacts When this takes place the unit shuts off and the display reads HI P 12134HP RA19266 VACUUM PROTECTION SWITCH The vacuum pump protection switch is a normally open sensor If a 25 psi 2 psi rating is reached at theintake the switch closes sending a signal to the main board The contacts are closed when anything greater then 25 psi is present in the lower cavity When 25 psi is achieved in the lower cavity the spring contact is forced into the mating contact 34 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Compressor Specifications and Service SUCTION DISCHARGE INTAKE 2 111161 12134CP COMPRESSOR SPECIFICATIONS Compressor Runs No Suction 1 3 hp Oil Less Compressor 1 Cap the intake fitting 4 6 Running Amperage 3 4 5 2 Install the low side gauge on the suction fitting 20 25 16 19 Locked Rotor Amperage 3 Besurethe discharge has nothing connected 110 220 Voltage tene 4 Start the compressor and monitor the suction TROUBLESHOOTING readings it should p
14. CH P In the vacuum mode the display reads 0 if the pressureis 25 psi or greater in the A C system This indicates that a recovery procedure must be performed before attempting to vacuum RA19330 Suction Line Strainer Filters the refrigerant coming from the high and low side manifold valves before entering into the manifold assembly RA19258 Recovery Solenoid Rebuild Kit A normally closed solenoid designed to prevent the flow of refrigerant into the system oil separator while the unit is turned off or in any mode other then recovery RA17328 Vacuum Sensor A normally closed sensor designed to open when a 17 vacuum is reached in the inlet manifold RA19006 RA19088 220 volt Liquid Solenoid A normally dosed solenoid that allows flow tothe expansion valve and charging solenoid of the selected refrigerant type only RA19258 Solenoid Rebuild Kit RA17577 Moisture Indicator References the moisture content of the refrigerant being recycled Pale yellow indicates wet light mint green indicates dry During recyding the moisture indicator is normally filled with liquid refrigerant and warm to the touch Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 43 36 37 38 41 30 14 Component Descriptions RA19288 Manifold By pass Check Valve 1 8 x 1 4 MFL Prevents flow during the recovery recycle and charging mode to the manifold by pass solenoid
15. NOT RECYCLE PROMPT ON WITH FLOW MOISTURE INDICATOR WILL NOT TURN GREEN UNIT WILL NOT PERFORM AN AIR PURGE 1 Verify that thetank valves are completely open 2 Check the tank for a minimum of 6 pounds capacity 3 Replacethe filter and moisture indicator Recyde for 11 2 hours minimum Note The air purge will only operate after 60 seconds of recycling for a maximum of 10 minutes and then drop power tothe air purge solenoid A minimum of 6 pounds of refrigerant must be in the tank for the air purge to function properly 1 Verify that the recovery tank does have excess air pressure in it The only accurate way to do this is to connect the high side of a hand held gauge set to the recovery tank s air purge fitting and check the pressure in thetank in relationship to a temperature pressure chart If excess air pressure is confirmed verify that all recovery tank hoses are properly connected tothetank Slowly disconnect the yellow hose where it attaches to the back of the unit If the tank is allowing access and the yellow hoseis unobstructed pressure will be released Repair or replace as necessary If the yellow hose has flow remove the front cover and verify that the exhaust port of the air purge device of the selected refrigerant type is not obstructed While recycling for at least three minutes verify that power 110 220 volts is being sent tothe air purge solenoid of the selected refrige
16. RA19316 Expansion Valve and Tube Converts incoming liquid refrigerant into a low pressure saturated vapor The calibration of the expansion valve can be checked at the oil drain valve with a pressure gauge Thetolerance of the valveis 30 to 40 psi and minimum recycling time is five minutes before checking RA19258 Recycling Solenoid Rebuild Kit A normally dosed solenoid that prevents the flow of refrigerant into the system oil separator when the unit is not in the recycling mode RA19258 Charging Solenoid Rebuild Kit Normally closed solenoid preventing flow to the A C system when the unit is turned off or in any mode other then charging RA19320 RA19321 220 volt Manifold Assembly Block assembly that houses the recovery recyding charging and vacuum solenoids this manifold also houses the vacuum sensor and three check balls the first ten minute stage of self clearing solenoids 12 Recovery 37 Recyde and 39 Charging are all open receiving power This block assembly allows the compressor to totally remove all the refrigerant from the unit to change from one refrigerant type to the next Note RA19258 Solenoid Rebuild Kits are available for all of the solenoids in this manifold block RA19236 Check Ball with Spring RA19258 Vacuum Solenoid Rebuild Kit Normally closed solenoid designed to prevent flow to the vacuum pump during recovery or charging no power supplied RA18760 System Oil Separat
17. TRACER Sane BROWN TRACER BYPASS YELLOW TRACER E COT YELLOW TRACER SOLENOID OOANDA WN c BLUE W BLK TRACER BLUE W BLK TRACER WHITE TRACER WHITE TRACER OLEROID PINK HIGH SIDE AIP AIP PINK CLEARING 3 WAY SOLENOID 1 SOLENOID 2 SOLENOID YELLOW YELLOW PURPLE PURPLE BLUE W RED TRACER BLUE W RED TRACER RECOVERY GREY SOLENOID GREY RECYCLE BLUE W WHT TRAGER SOLENOID BLUE W WHT TRACER LARGE TAN TAN 1 2 3 4 5 6 T 8 9 VACUUM SOLENOID 1 MAIN BLUE POWER BROWN 22 BROWN GREEN RED COMPRESSOR EE RELAY 0 ORANGE BROWN COMPRESSOR BROWN 123 1 MOTO VACUUM 2 p BRN PUMP 6 OUTLET LOW sue A i PRESSURE PRESSURE CUT OUT CUT OUT CUT OUT CAPACHOR MOTOR RED START RELAY RED IN0065 28 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Main Board Diagram 2 o o 5AMP 9 HI P WARNING BLANK DISPLAY J5 1 NOT STUFFED O 000000000000 2 Rit o OUT 3 oo 900474 o 50075 5 Ri4 0016 R15 ro 50077 oi R5 RN2
18. at the same ti me to start the recycle mode Start the separate recovery unit 17650 or 34650 When the recovery light on the separate recovery unit shuts off wait ten minutes and watch your hand held manifold gauge set for a pressure rise above zero Repeat Steps 11 and 12 until positive pressure does not develop on the gauge set Always wear safety goggles when working with refrigerants Contact with refrigerant can cause eye injury Disconnect lines and hoses with extreme caution Pressurized refrigerant may be present in lines and hoses Always point lines and hoses away from you and anyone nearby Always unplug the station from the power source before removing any of the shrouding or beginning any service work To order parts please call Robinair Customer Service at 1 419 485 5561 Or FAX your order to 1 419 485 4330 All service related questions should be directed to the Robinair Technical Assistance Line at 1 800 822 5561 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Component Descriptions RECOVERY 1 18190A R 134a Low Side Coupler blue actuator smaller Allows access to the low side on an R 134a system RA19115 Replacement Front O Ring Only RA19329 R 134a Low Side Hose Provides flow from the low side coupler to the low side port on the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring RA19309 R 12 96
19. can be determined using the Scale Specification charts on page 53 CHECKING THE SCALE ACCURACY 1 Turn on theMain Power switch 2 Press the SHIFT RESET key until the pro gram prompt is highlighted on the screen Note If theunit is just being turned on the screen will default to display the selected refrigerant type Press SHIFT RESET until the program message is displayed 3 When the screen has the program prompt highlighted press and hold the SHIFT RESET key and then the ENTER key The screen will read FUNC when the manual diagnostic mode has been entered properly 4 Remove all weight from the scale platform 5 Press 6 to turn the scale into a direct read ing weight scale Note Whatever weight is on the scale when 6 is depressed will not be shown on the display By depressing 6 the unit automatically zeros the weight on the scale If you remove the weight the display will show the change in total weight but will not show a negative sign Note Verify that the scale is plugged into the main board if the scale will not react to testing RECALIBRATING THE SCALE 1 Remove all weight from the scale platform 2 Turn on theMain Power switch Note If theunit is just being turned on the screen will default to display the selected refrigerant type Press SHIFT RESET until the program message is displayed 3 Press and hold SHIFT RESET and then press ENTER Thedisplay reads FUNC 4 Press 9 The display w
20. center port of the hand held manifold gauge set to the tank s vapor fitting Open thetank s vapor valve but do not open the hand held high side manifold gauge valve PressSHIFT RESET Press SHIFT RESET and 1 at the same time The unit should begin recycling The high side manifold gauge of the hand held manifold should start increasing pressure 55 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Function Check Theunit should shut off and display The high side manifold gauge should have a pressure of 435 psi 20 psi on it The pressure on the high side gauge should hold for at least three minutes If the pressure drops instantly or bleeds off steadily the recovery check valve needs to be replaced After checking for pressure loss slowl y open the high side manifold valve This will equalize theunit and tank pressure Once the pressure is equalized close the tank s vapor valve Closethe high side manifold valve and discon nec the hose between the tank s vapor valve and the manifold gauge set at the tank end Disconnect the tank s vapor hose from the manifold gauge set Reconnect the tank s vapor hose to the vapor valve on the tank and open the valve Open both manifold gauge valves and press RECOVER Allow the unit to recover until it automatically shuts off Press SH
21. performance RA19008 Manufacturer HITEC New Style Application 17700 Style Units 50 Lb Tanks Control Main PC Board c suu Gray in color Connector 4Pins Dimensions 53 4 71 2 L Maximum Capacity 81 74 L bs Datefirstused 8 16 93 53 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual Diagnostic Procedures To access diagnostics press SHIFT RESET and ENTER at the same time Diagnostics has been sucessfully entered when the display reads FUNC Then press 1 Vacuum pump runs continuously 2 ADD prompt displays compressor starts 3 Total amount of refrigerant recovered to date is displayed 4 Shows last scale calibation date and number of calibations performed 54 5 Displays all Icd information 6 Shows scale as a direct reading weight scale 7 Shows weight on scaleless 27 pounds 8 Not used 9 Allows access to scale calibration 0 Automatically switches from pounds to kilograms HOLD Performs a manual air purge Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Function Check RECOVERY CHECK 1 Plug in the unit 2 Turn on the Main Power switch The display reads the last selected refrigerant type Press SHIFT RESET 3 Install the loose end of the low side hose coup
22. the expansion valve and recycle solenoid of the selected refrigerant type only RA19258 Solenoid Rebuild Kit RA17577 Moisture Indicator References the moisture content of the refrigerant being recycled Pale yellow indicates wet light mint green indicates dry During recycling the moisture indicator is normally filled with liquid refrigerant and warm to the touch RA19320 RA19321 220 volt Manifold Assembly Block assembly that houses the recovery recycling charging and vacuum solenoids this manifold also houses the vacuum sensor and three check balls In the charging mode solenoids 12 Recovery 30 Vacuum and 37 Recycling all closed no power supplied Note RA19258 Solenoid Rebuild Kits are available for all of the solenoids in this manifold block RA19236 Check Ball with Spring RA19258 Charging Solenoid Rebuild Kit Normally closed solenoid preventing flow to the A C system when the unit is turned off or in any mode other then charging 11 10 RA19330 Suction Line Strainer Filters the refrigerant coming from the high and low side manifold valves before entering into the manifold assembly RA19266 Vacuum Pump Protection Switch A normally open sensor that closes when pres sure greater than 25 psi is present in the A C system If the pressure is less then 25 psi in the recovery mode the display reads CH P In the vacuum mode the display reads U HI if the pressureis 25 psi or gr
23. to the vapor side of the 50 Ibs tank 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit R 12 17773 Replacement R 134a Quick Seal O Ring 17506 R 12 or 34750 R 134a Refillable Refrigerant Tank Stores refrigerant Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Component Descriptions SELF CLEARING SECOND STAGE 10 MINUTES VACUUM PUMP ONLY In the second stage of the self clearing mode everything is the same as in the first stage with the exception that A The 17 Compressor and 24 Discharge solenoids are not powered B The following items are allowing flow 42 43 41 RA19006 RA19088 220 volt Manifold By Pass Solenoid A normally closed solenoid that opens only in the second ten minutes of the self clear process This solenoid opens allowing access to the discharge of the compressor when the vacuum pump starts running RA19258 Solenoid Rebuild Kit RA19288 Manifold By Pass Check Valve 1 3 x 1 4 MFL Prevents flow during the recovery recyde and charging mode tothe mani fold by pass solenoid RA19320 RA19321 220 volt Manifold Assembly Block assembly that houses the recovery recycling charging and vacuum solenoids this manifold also houses the vacuum 30 31 32 sensor and three check balls In the second ten minute stage of self clearing solenoids 12 Recovery 30 37 Recycle and 39
24. wires to the recycling solenoid and verify that power 110 220 volts is being sent to the recycling solenoid If thereis no voltage inspect the controlling wires for continuity Replacethe main board if the wires have continuity 8 If therecyding solenoid is receiving power look for loose wires to the liquid solenoid of the selected refrigerant type and verify that power 110 220 volts is being sent tothe liquid solenoid If there is no voltage inspect the controlling wires for continuity Replace the main board if the wires have continuity 9 If the liquid solenoid of the selected refrigerant typeis receiving power inspect the liquid line strainer see page 32 for obstructions Replace or clean as necessary 10 If the strainer is not plugged attempt recalibrating the expansion valve Replace the expansion valve and tube as necessary 11 If all previous attempts have failed replace the main board 43 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual TROUBLESHOOTING UNIT WILL NOT RECYCLE 1 Check that all recovery tank hoses are RECYCLE PROMPT ON NO FLOW installed properly and Schraeder cores are depressed 2 Verify that the recovery tank valves are completely open 3 Check that there is a minimum of 6 pounds of refrigerant in the recovery tank 4 Check the oil drain valve for leaks the valve should be closed 5 Inspect the liquid line strainer for debris and clean or replace as nece
25. 1 and 3 In the self clearing mode the solenoid is energized passing the refrigerant directly to the discharge solenoid of the selected refrigerant type ports 1 and 2 20 RA17529 High Pressure Cut Out A normally dosed sensor that turns off the unit when the discharge pressure reaches 435 psi Note This switch has three contacts the outer two contacts numbered 1 and 3 are normally dosed and have two solid red wires attached tothem 21 RA17522 RA17578 220 volt Pressure Equaliz ing Solenoid A normally open solenoid that allows the suction and discharge pressures on the compressor to equalize and forces pressure down on the oil separator to drain the oil recovered from the A C system when the solenoid loses power This solenoid receives power whenever the compressor is running 14 RA18760 System Oil Separator At this point high pressure high temperature vapor enters the separator and passes through a condensing coil The vapor cools and condenses by giving up heat to the incoming refrigerant 22 RA19198 R 12 Auto Air Purge Device Liquid refrigerant is circulated through the upper section during recyding to establish a reference pressure 22a RA19242 R 134a Auto Air Purge Device Liquid refrigerant is circulated through the upper section during recyding to establish a reference pressure 23 RA19287 Recovery Check Valve 1 4 MFL x 18 Allows flow in one direction only and prevents refrig
26. 8 Solenoid Rebuild Kit 25 RA19282 Recovery Check Valve 1 8 MPT x 1 8 31 111877 Vacuum Hose 40084 Replacement H ose Gasket 32 RA15425 RA15428 220 volt Vacuum Pump 13203 Pump Oil 15369 Base and Foot Assembly 34 RA19006 RA19088 220 volt R 12 Liquid Solenoid RA19258 Solenoid Rebuild Kit 34a RA19006 RA19088 220 volt R 134a Liquid Solenoid RA19258 Solenoid Rebuild Kit 35 RA17577 Moisture Indicator 36 RA19316 Expansion Valve and Tube 38 RA19006 RA19088 220 volt R 12 Air Purge Solenoid RA19258 Solenoid Rebuild Kit 38a RA19006 RA19321 220 volt R 134A Air Purge Solenoid RA19258 Solenoid Rebuild Kit 41 RA19320 RA19321 220 volt Manifold Assembly 42 RA19006 RA19088 220 volt Manifold By Pass Solenoid 43 RA19288 Manifold By Pass Check Valve 1 8 x 1 4 17 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Flow Diagram R 12 Recovery 1 4 FLARE R 12 HIGH 3 gt INLET gt Low 3 54 gt SCHRADER CORE GAS 1 eia 23 Qa 5 34 MANUALLY FROM 12 134 PURGE SLIDING DOOR TO EXPOSE R 12 FITTINGS OR 134a FITTINGS BUT NEVER AT THE SAME TIME Com 12 Rec 18 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Flow Diagram R 134a Recovery 1 2 ACME 134 3 se INLET 122 27 Low 3
27. IFT RESET Press VACUUM Allow the pump torun for five minutes then press HOLD CONT Check for a loss of vacuum on thelow side gauge CHARGING AND SCALE CHECK Note To ensure a complete charge recycle for at least five minutes before attempting to charge Turn on the Main Power switch Press and hold SHIFT RESET and press ENTER 3 Press 6 4 Check the scale accuracy and recalibrate if 56 necessary refer to page 52 Install the high and low side hoses tothe vapor and liquid valves of a separate reusable cylinder Open the vapor and liquid valves on thetank Open the high and low side manifold valves 7 Program a two pound charge into the main board 8 Start the automatic charging process 9 The charging process should stop when the 10 11 programmed amount of weight has been lost from the scale There should be pressure on the gauges The display should show CPL Recover the refrigerant charged into the tank CLEARING CHECK 1 Turn on the Main Power switch The display reads the last selected refrigerant type Press SHIFT RESET until CLR appears on display Press HOLD CONT The compressor should start and the unit s gauge should pull to a 17 vacuum After ten minutes the compressor should stop and the vacuum pump will start 5 The vacuum pump should run for ten minutes 6 When the pump stops the unit should read 10 11
28. NLET se SCHRAEDER CORE 3 TANK CONNECTIONS MANUALLY CHANGED LIQUID LIQUID FROM R 12 TO 134a O PURGE SLIDING DOOR TO EXPOSE R 12 FITTINGS OR 134a FITTINGS BUT NEVER BOTH AT THE SAME TIME 12134a 16 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Flow Diagram 3 40352 Schraeder Core RA19279 RA19319 Metric Low Side Gauge RA19257 Replacement Lens 5 RA19044 Low Side Manifold Valve 8 RA19280 RA19319 Metric 23 4 High 10 11 13 14 15 16 17 18 19 20 21 22 Side Gauge RA19257 Replacement Lens RA19044 High Side Manifold Valve RA19266 Vacuum Pump Protection Switch RA19330 Suction Line Strainer RA17328 Vacuum Sensor RA18760 System Oil Separator RA19291 Oil Drain Valve RA17419 Oil Drain Bottle 34430 Filter 40084 Gaskets RA19302 RA19314 220 volt Compressor RA17416 RA17516 220 volt Fan RA19331 RA19327 220 volt High Side Diversion Solenoid RA17529 High Pressure Switch RA17522 RA17578 220 volt Pressure Equal izing Solenoid RA19198 R 12 Auto Air Purge 22a RA19242 R 134A Auto Air Purge 23 RA19287 Recovery Check Valve 1 4 MFL x 18 24 19006 RA19088 220 volt R 12 Discharge Solenoid RA19258 Solenoid Rebuild Kit 24a RA19006 RA19088 220 volt R 134A Discharge Solenoid RA1925
29. OTH AT THE SAME TIME Com Vac FI 22 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Flow Diagram R 12 Charging 1 4 FLARE R 12 3 gt INLET ag 2 SCHRADER CORE e 25 cas E T TANK CONNECTIONS LIQUID MANUALLY CHANGED 34 3 FROM R 12 TO 134a PURGE SLIDING DOOR TO EXPOSE R 12 FITTINGS OR 134a FITTINGS BUT NEVER BOTH nns AT THE SAME TIME 23 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Flow Diagram R 134a Charging 1 2 134 HIGH 3 gt INLET Low 3 SCHRADER CORE cas 25 3 TANK CONNECTIONS MANUALLY FROM R 12 TO 134a PURGE SLIDING DOOR TO EXPOSE R 12 FITTINGS OR 134a FITTINGS BUT NEVER BOTH AT THE SAME TIME Com 34 Chg 24 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Pictorial Views 13 RA17328 Vacuum Sensor 14 RA18760 System Oil Separator 16 34430 Filter 40084 Gaskets 17 RA19302 RA19314 220 volt Compressor 18 RA17416 RA17516 220 volt Fan 19 RA19331 RA19327 220 volt High Side Diversion Solenoid 20 RA17529 High Pressure Cut Out 22 RA19198 R 12 Auto Air Purge 22a RA19242 R 134a Auto Air Purge 24 RA19006 RA19088 220 volt Discharge Solenoid RA19258 Solenoid Rebuild Kit 32 15425 RA15428 220 volt Vacuum Pump 13203 Pump Oil 15369 Base an
30. ROBINAIR Service Manual Series 12134A 12135A 12136A Recovery Recycling Recharging Unit For R 12 and R 134A Theory of Operation and Safety Precautions 2 Component 3 Flow Diagrams o cei 16 Pictorial Views 25 Wiring 28 Main Board 29 Component Specifications 30 Compressor Specifications and Service 35 Tubing Schematic essen 36 Troubleshooting aa nennen 37 RA19301 RA19246 Replacement Main Board 51 RA19008 Scale dentification Accuracy Check and Recalibration 52 Checking the Scale 52 Recalibrating the 5 52 Setting the P T POE a eei ete 52 RA19008 Scale Specifications 53 Diagnostic 54 Function Check u oe e eene edes 55 Recovery Check eet eerte 55 Evacuation and Recycling Check 55 Charging and Scale Check 56 Clearing Check dede eet a e bi els 56 Labor Rates 57 ORIGINAL 6 1 95 Series 12134 12135 12136
31. T RUNNING CONTINUED UNIT WILL NOT PULL A VACUUM IN THE SECOND STAGE SELF CLEARING VACUUM PUMP IS RUNNING 50 7 If the vacuum pump relay is energized receiving 110 220 volts to the coil unplug the unit and check for continuity from 2 contact to 4 contact and 46 contact to 8 contact with an ohm meter There should be continuity on both Sets of contacts with the ear on the relay depressed If thereis no continuity replace the vacuum pump relay Verify that the manifold gauge valves are open Verify that the high and low side hoses couplers are not leaking Check that the vacuum pump hose is snug at both ends and not obstructed inspect hose gaskets for leaks Check for suction at theintake of the vacuum pump If thereis no suction replacethe vacuum pump Remove the shroud and look for loose wires to the vacuum solenoid Check for power 110 220 volts to the vacuum solenoid If power is present rebuild the solenoid or inspect for debris If power is not present check the solenoid s power supply wires for continuity If they have continuity replace the main board Verify that the suction line strainer is not plugged Check the low side gauge for proper operation and calibration Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 RA19301 110V RA19246 220V Replacement Main Board The boards can easily be identified by the six digit part number sten
32. a 17 vacuum is reached at the vacuum sensor RA17416 RA17516 220 volt Fan Assists in cooling the compressor during normal operation RA19331 RA19327 220 volt High Side Diver sion Solenoid A three way normally dosed solenoid During normal operation the refrigerant passes through to the system oil separator In the self clearing mode the sole noid is energized passing the refrigerant directly to the discharge solenoid of the selected refrigerant type ports 1 and 2 RA19006 RA19088 220 volt Manifold By pass Solenoid A normally dosed solenoid that opens only in the second ten minutes of the self dearing process This solenoid opens allow ing access to the discharge of the compressor when the vacuum pump starts running RA19258 Solenoid Rebuild Kit 23 24 25 26 27 RA19287 Recovery Check Valve 1 8 MPT x 1 4 MFL Allows flow in one direction only and prevents refrigerant in the tank from coming back into the unit during shutdown RA19006 RA19088 220 volt Discharge Solenoid R 12 or R 134a Allows refriger ant flow to the red vapor side of the selected refrigerant type only RA19258 Solenoid Rebuild Kit RA19282 Recovery Check Valve 1 8 MPT x 1 8 MPT Allows flow in one direction only and prevents refrigerant in the tank from coming back into the unit during shutdown RA19312 R 12 or RA19307 R 134a 36 Red Tank Hose Delivers refrigerant being recovered or recyded
33. ain port Open the oil drain valve see page 2 Step 2 3 Program 20 minute vacuum into the Main Board and start an automatic vacuum process The vacuum pump should start Verify that the low side manifold valve is dosed 5 The high side gauge should start registering a vacuum Within 10 to 15 seconds of the vacuum pump starting the recyde prompt should appear on the display and a click will be heard The compressor is starting The recycling and liquid solenoids are being energized After five minutes the high side gauge should bein a vacuum and the low side gauge should riseto around a 30 to 40 psi reading expansion valve pressure After 20 minutes of recycling the moisture indicator should turn mint green signifying therefrigerant is dry When the unit shuts off automatically com pletes the vacuum process dose the oil drain valve and disconnect the low side hose from the oil drain port 10 The high side manifold gauge valve should hold 11 12 13 14 15 16 17 18 19 a vacuum If it does not inspect the Quick Seal hose ends or couplers for leaks Close the tank s vapor valve Disconnect the tank s vapor hose from the tank Acquire a separate manifold gauge set of the selected refrigerant type and verify that the manifold gauge valves are closed Connect thetank s vapor hose to the high side of the separate manifold gauge set Connect a hose between the
34. al If it is replace the main board If it is not send ing signal replace the keypad Display Reads CH F 1 TheFilter changetime has elapsed To reset the timer refer to the operating manual for filter change procedure 2 If after attempting to reset the timer the CH F warning doesn t disappear replace the main board Display Reads 15 00 Vacuum Program Minutes 1 If the display does not respond to keypad commands verify that the keypad is plugged in If the keypad is plugged in but not responding replace the keypad If the keypad is functional a tone will be heard when a key is pressed Display Reads Scale 1 Check the scale calibration and recalibrate if necessary Refer tothe scale calibration instructions on page 52 2 Check the scale s cableto be sure it is connected to the main board 3 Disconnect the scale cable from the main board jumper the white and black leads if the display still reads Scale and replace the main board If the display dears the message Scale replace the scale 40 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL NOT EVACUATE 1 Verify that the manifold gauge valves are open PUMP RUNS 2 Verify that the high and low side hoses cou plers are tight at all fittings and the Schraeder cores are depressed Check that the vacuum pump hose is snug at both ends and not obstructed inspect hose gaskets for leaks
35. at turns off the unit when the discharge pressure reaches 435 psi Note This switch has three contacts the outer two contacts numbered 1 and 3 are normally closed and have two solid red wires attached to them 19 RA19327 117327 220 volt High Side Diversion Solenoid A three way normally closed solenoid During normal operation the refrigerant passes through to the system oil separator In the self dearing mode the solenoid is energized passing the refrigerant directly to the discharge solenoid of the selected refrigerant type Refrigerant back seats against port 3 11 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual 21 17 18 19 41 12 Component Descriptions RA17522 RA17578 220 volt Pressure Equal izing Solenoid A normally open solenoid that allows the suction and discharge pres sures on the compressor to equalize and forces pressure down on the oil separator to drain the oil recovered from the A C system when the solenoid loses power T his solenoid does not receive power in the self clearing mode RA19302 RA19314 220 volt Compressor Converts low pressure entering gas into a high pressure exiting gas This is a 1 3 horse power oil less compressor help eliminate vibration this is a hose plumbed compressor with flare connections on the unit end of the hose In the first stage of the self clearing the compressor runs for a minimum of ten minutes and until
36. at turns off the unit when the discharge pressure reaches 435 psi Note This switch has three contacts the outer two contacts numbered 1 and 3 are normally closed and have two solid red wires attached tothem RA17522 RA17578 220 volt Pressure Equal izing Solenoid A normally open solenoid that allows the suction and discharge pres sures on the compressor to equalize and forces pressure down on the oil separator to drain the oil recovered from the A C system when the solenoid loses power T his solenoid receives power whenever the compressor is running RA18760 System Oil Separator At this point high pressure high temperature vapor enters the separator and passes through a condensing coil The vapor cools and condenses by giving up heat to the incoming refrigerant RA19198 R 12 Auto Air Purge Device Liquid refrigerant is circulated through the upper section during recycling to establish a reference pressure 22a RA19242 R 134a Auto Air Purge Device 23 24 25 26 27 29 38 Liquid refrigerant is circulated through the upper section during recycling to establish a reference pressure RA19287 Recovery Check Valve 1 4 MFL x 1 8 MPT Allows flow in one direction only and prevents refrigerant in the tank from coming back into the unit during shutdown RA19006 RA19088 220 volt Discharge Solenoid R 12 or R 134a A normally closed solenoid that allows refrigerant flow to the
37. attempt recovery again Note Inspect the Schraeder cores to verify that they are depressing properly Look for loose or broken wires in the unit Verify that the suction line strainer is not plugged see page 36 part number RA19330 Install the low side hose coupler on the oil drain port with the low side valve closed see page 2 Step 2 for more details Open the oil drain valve Look at the psi reading If pressure is below 25 test the vacuum sensor for continuity If the vacuum sensor has continuity replace it If it doesn t check the vacuum sensor wires for continuity If the wires have continuity replacethe main board If there is no positive pressure verify that the inlet check valveis operating properly Also verify that the recovery solenoid is opening and allowingflow Repair or replaceas necessary 39 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual TROUBLESHOOTING UNIT WILL NOT START OR Display Reads CH P COMPLETE A RECOVERY CONTINUED If there is less than 25 psi at the inlet attempt recovering from a positive pressure source 2 Verify that the wires that control the vacuum pump protection switch have continuity 3 If there is more than 25 psi at the inlet replace the vacuum pump protection switch 4 f the sensor is operating properly press CONT to override 5 If the main board will not let you override verify that the keypad is sending the sign
38. be displayed and can be zeroed by performing a filter change The user can also read the amount of refrigerant in the tank by accessing diagnostics and pressing 7 When theunit is in the program charge mode and an amount is requested that will drop the recovery tank s capacity below 6 pounds an ADD message will appear on the display This notifies the operator that there is insufficient refrigerant in thetank to properly charge the system 1 Low side clearing Recovery automatic shut down Display should read amount recovered Programmable vacuum time Programmable charge amount uU B WU N Auto scale calibration feature Note See auto scale calibration instructions on page 52 7 Programmable settings for oil changes filter change time vacuum pump run time 8 Running refrigerant counter 9 Diagnostics 7 counter for refrigerant weight 51 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual RA19008 Scale Identification Accuracy Check and Recalibration Thetype of scales used on the 12134A series is the same scale used on the 17700 Series units The scales will only handle a 50 Ib tank and havethe same overfill protection shut off of 73 pounds Where thetwo scales differ is in the method of calibration The scale calibration procedureis still done through the keypad but the procedure is different The scales have been manufactured by different vendors and their identification
39. ciled in white lettering on the back side of the main board The first generation board part numbers 116834 110v and 117570 220v performed several basic functions low side clearing feature allows the user to receive a more accurate reading of the amount of refrigerant recovered To do this the board does not apply power to the recovery solenoid when the recovery key is pressed The solenoid is allowed to remain closed until the inlet tubing 15 in a 17 vacuum When a vacuum is reached the vacuum sensor opens the main board detects that and the recovery solenoid is then opened After the recov ery solenoid opens the vacuum sensor closes and the scale starts showing the amount of refrigerant being recovered Before the recovery solenoid opens the screen will display CL L Other basic functions are automatic scale calibra tion and 10 hour oil change time The board can be programmed for a minimum vacuum time oil change time and filter change time The board will automatically default to a 15 minute vacuum ti me 10 hour oil change and 300 pound filter change This board also has the CH P warning initiated when recovery is engaged if less than 25 psi is at the inlet This board can read the amount of refrigerant recovered over a period of time week month depending upon how often the user wants to check on it To access that function the user must enter manual diagnostics and press 3 The amount recovered will
40. d F oot Assembly 34 RA19006 RA19088 220 volt Liquid Solenoid RA19258 Solenoid Rebuild Kit 48 RA17459 System Relay IN0056 25 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Pictorial Views 8 RA19280 RA19318 metric 23 4 High Side Gauge 9 RA19044 High Side Manifold Valve 13 RA17328 Vacuum Sensor 14 RA18760 System Oil Separator 16 34430 Filter Drier 19 RA19331 RA19327 220 volt High Side Diversion Solenoid 20 RA17529 High Pressure Cut Out 21 RA17522 RA17578 220 volt Pressure Equalizing Solenoid 22 RA19198 Auto Air Purge 24 RA19006 RA19088 220 volt Discharge Solenoid RA19258 Solenoid Rebuild Kit 34 RA19006 RA19088 220 volt Liquid Solenoid RA19258 Solenoid Rebuild Kit 38 RA19006 RA19088 220 volt Air Purge Solenoid RA19258 Solenoid Rebuild Kit 42 RA19006 RA19088 220 volt Manifold By pass Solenoid RA19258 Solenoid Rebuild Kit 12134SV 26 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Pictorial Views 15 RA19291 Oil Drain Valve RA17419 Oil Drain Bottle 46 RA19008 Scale 52 RA14967 Scale Platform 50 117334 Power Entry Connector 1N0057 27 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual Wiring Diagram PURPLE PURPLE W TRACER SOLENOID ORANGE W TRACER DOOR ORANGE W TRACER SOLENOID POSITION RED W TRACER ee SENSOR RED W TRACER BROWN
41. e RA19257 23 4 Replacement Gauge Lens RA19044 Low Side Manifold Valve Allows flow from the low side hoseto the center mani fold port Valveis open in theself dearing mode 18191A R 134a High Side Coupler red actua tor larger Allows access to the high side on an R 134a system Coupler is closed in the self clearing mode RA19115 Replacement Front O Ring Only RA19328 R 134a High Side Hose Provides flow from the high side coupler to the high side port of the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring RA19308 R 12 96 Red Hose Double Quick Seal High side service hoseto the vehicle Hose is disconnected from the vehide in the self clearing mode 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit 3 10 11 12 13 35 40352 Schraeder Core Package of six 6 replacement Schraeder valves RA19280 RA19318 metric 23 4 High Side Gauge Used to read pressure entering the high side hose RA19257 23 4 Replacement Gauge Lens RA19044 High Side Manifold Valve Allows flow from the high side hose to the center manifold port Valveis open in the self dearing mode RA19266 Vacuum Pump Protection Switch A normally open sensor that doses when pres sure greater than 25 psi is present in the A C system If the pressureis less then 25 psi in the recovery mode the display reads
42. e Replacethe compressor as necessary Verify that there is no voltage to the vacuum solenoid If voltage is applied replace the main board If thereis no voltage disconnect the vacuum hose from the cart and put a gauge on the vacuum hose fitting using a 3 8 FFL x 1 4 MFL adapter part number 13064 If your gauge pulls a vacuum clean or rebuild the vacuum solenoid Closethe tank s liquid valve If pressure starts dropping on the gauge dean or rebuild the liquid solenoid of the selected refrigerant type Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL NOT COME OUT OF FIRST STAGE SELF CLEARING AFTER TEN MINUTES COMPRESSOR IS RUNNING CONTINUED UNIT WILL NOT PULL A VACUUM IN THE SECOND STAGE SELF CLEARING VACUUM PUMP IS NOT RUNNING 10 11 12 Remove the copper line running from the manifold by pass solenoid to the expansion valve and tube Connect the center port of a hand held manifold to the fitting on the expansion valve and tube Connect the high side hose of the hand held manifold to the manifold by pass solenoid Close the high side manifold valve Start the clearing process If thereis a riseon the high side gauge clean or rebuild the manifold by pass solenoid Note Remember to reconnect tubing Verify that the high side diversion solenoid is receiving power 110 220 volt If it is not receiving power check the sol enoid s power supp
43. e inlet line The switch has two orange wires attached to it RA17416 RA17516 220 volt Fan Cools the cabinet temperature RA17529 High Pressure Cut Out A normally closed sensor that turns off the unit when the discharge pressure reaches 435 psi This switch has three contacts the outer two contacts numbered 1 and 3 are normally closed 45 47 RA17459 RA17324 220 volt System Relays 50 51 44 RA40994 RA17135 220 volt Main Power Switch Controls the power between the power cord and the main board RA19301 RA19246 220 volt Main Board Controls the unit function automatic or programmed RA19008 Scale Sends a signal tothe main board for accurate weight readings and tank overfill protection RA19253 Keypad Programs the main board Energizes the compressor and vacuum pump allowing the sensors to turn off the machine Therelay has two sets of contacts which close when the coil is energized 117334 Power Entry Connector Female Socket where the power cord connects RA19303 117581 220 volt Power Cord Provides power to the unit Series 12134A 12135A 12136A Service Manual ORIGINAL 6 1 95 15 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Flow Diagram 1 4 1 2 FARE ACME R 12 134a HIGH3 INLET I
44. eater in the A C system This indicates that a recovery procedure must be performed before attempting to vacuum RA19044 Low Side Manifold Valve Allows flow from the low side hose to the center manifold port RA19044 High Side Manifold Valve Allows flow from the high side hose to the center manifold port RA19279 RA19319 metric 23 4 Low Side Gauge Used to read pressure entering the low side hose RA19257 23 4 Replacement Gauge Lens RA19280 RA19318 metric 23 4 High Side Gauge Used to read pressure entering the high side hose RA19257 23 4 Replacement Gauge Lens 40352 Schraeder core Package of six 6 replacement Schraeder valves RA19329 R 134a Low Side Hose Provides flow from the low side coupler tothe low side port on the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring RA19309 96 R 12 Blue Hose Double Quick Seal Low side service hose to the vehicle 18180 Replacement Quick Seal O Ring 40300 Quick Seal Repair Kit 18190A R 134a Low Side Coupler blue actuator smaller Allows access to the low side on an R 134a system RA19115 Replacement Front O Ring Only Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Component Descriptions 3 40352 Schraeder Core Package of six 6 replacement Schraeder valves 7 RA19328 R 134a High Side Hose Provides flow from the
45. erant in the tank from coming back into the unit during shutdown 24 25 26 27 28 38 22 RA19006 RA19088 220 volt Discharge Solenoid R 12 or R 134a A normally closed solenoid that allows refrigerant flow to the vapor side of the selected refrigerant type only RA19258 Solenoid Rebuild Kit RA19282 Recovery Check Valve Ys x 1 3 Allows flow in one direction only and prevents refrigerant in the tank from coming back intothe unit during shutdown RA19312 R 12 or RA19307 R 134a 36 Red Tank Hose Delivers refrigerant being recovered or recyded to the vapor side of the 50 Ib tank 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit R 12 Only 17773 Replacement R 134a Quick Seal O Ring 17506 R 12 or 34750 R 134a Refillable Refrigerant Tank Stores refrigerant to be recycled later RA19310 R 12 or RA19313 R 134a Air Purge Hose Supplies pressure from the top of the recovery tank to the air purge control 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit R 12 Only 17773 Replacement R 134a Quick Seal O Ring RA19006 RA19088 220 volt Air Purge Sole noids R 12 or R 134a Prevents flow of refrigerant into the lower cavity of the air purge device of the selected refrigerant type until energized 60 seconds after the recyding process has been engaged Note Power is dropped from the solenoid after 10 minutes of purging
46. han 6 amps or not running replacethe compressor 47 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual TROUBLESHOOTING UNIT WILL NOT COME OUT OF FIRST STAGE SELF CLEARING AFTER TEN MINUTES COMPRESSOR IS RUNNING 48 1 If the unit is being run through an extension cord eliminate its use Verify that the high and low side hoses couplers are disconnected from the vehicle and not leaking Verify that the manifold valves are open and not leaking Verify that the oil drain valve is closed and not bleeding through Inspect the filter for flow obstructions and check for leaks around the gasket area Note Fittings on quick disconnects should only be hand tightened Replace gaskets as needed When installing gaskets be sureto lubricate them with vacuum grease or refrigerant oil Install the low side hose coupler on the oil drain port see page 2 step 2 With the low side valve closed open the oil drain valve Check the gauge If psi is below 25 of vacuum test the vacuum sensor for continuity If thereis continuity replace the sensor If thereis no continuity check the vacuum sensor wires for continuity If the wires have continuity replace the main board Check the compressor discharge and suction pressure refer to page 35 for detailed instruc tions The compressor should have 20 25 at the suction port and should build pressure to 150 psi on the discharg
47. high side coupler to the high side port of the unit 14 x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring 7 RA19308 96 R 12 Red Hose Double Quick Seal High side service hose to the vehicle 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit 6 18191A R 134a High Side Coupler red actua tor larger Allows access to the high side on an R 134a system RA19115 Replacement Front O Ring Only ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual Component Descriptions SELF CLEARING FIRST STAGE 10 MINUTES COMPRESSOR ONLY 1 18190A R 134a Low Side Coupler blue actua 10 tor smaller 1 0 Allows access to the low side on an R 134a system Coupler is closed in the self clearing mode RA19115 Replacement Front O Ring Only RA19329 R 134a Low Side Hose Provides flow from the low side coupler tothe low side port on the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring RA19309 96 R 12 Blue Hose Double Quick Seal Low side service hose to the vehicle Hose is disconnected from vehicle in the self dearing mode 18180 Replacement Quick Seal O Ring 40300 Quick Seal Repair Kit 40352 Schraeder Core Package of six 6 replacement Schraeder valves RA19279 RA19319 metric 23 4 Low Side Gauge Used to read pressure entering the low side hos
48. ies 12134 12135 12136 Service Manual TROUBLESHOOTING UNIT WILL NOT COME OUT OF CL L COMPRESSOR IS OFF UNIT WILL NOT START OR COMPLETE A RECOVERY 38 1 If the unit is being run through an extension cord eliminate its use 2 Remove the shroud and look for loose wires 3 Check for power 110 220 volts to the coil of the compressor relay energized If there is no voltage check the wires from the main board tothe compressor relay for continuity If they have continuity replace the main board 4 f the compressor relay is powered receiving 110 220 volts tothe coil unplug the unit and check for continuity from 2 contact to 4 contact and 6 contact to 8 contact with an ohm meter There should be continuity on both sets of contacts with the ear on therelay depressed If there 15 no continuity replace the compressor relay 5 Check for voltage to the compressor If there 15 no voltage inspect the wires between the compressor and the compressor relay for continuity Repair or replace as necessary 6 If voltage is present at the compressor check the compressor amp draw If it is drawing higher than 6 amps or not running replace the compressor Display Reads HI P 1 Verify that both tank valves are open 2 Check the tank pressure It should not exceed 300 psi If it is high bleed the pressure down to 200 psi by recyding and allowing the auto matic air purge to operate 3 Check the red
49. ill be blank 5 Press RECOVER and ENTER at the same time 52 The display flashes DATE and then shows 0 00 7 Enter the current month and year For example if theunit is being calibrated on November 8 1996 you will enter 1196 Press ENTER 8 The display will flash CAL then read 2 zero 9 Make sure nothing is on or touchingthe scale platform Press ENTER 10 The display will flash CAL then read A1 11 Place a certified weight between 10 and 80 pounds in the center of the platform Enter that weight on the display using the keypad then press ENTER The display returns to the vacuum mode 7 Check the scale accuracy see page 52 SETTING THE P 1 POT 1 Remove all weight from the scale platform 2 Turn on the Main Power switch Note If theunit is just being turned on the screen will default to display the selected refrigerant type Press SHIFT RESET until the program message is displayed 3 Press SHIFT RESET and ENTER at the same time Thedisplay reads FUNC 4 Press 6 Note Whatever weight is on the scale when 6 is depressed will not be shown on the display By depressing 6 the unit automatically zeros the weight on the scale If you remove the weight the display will show the change total weight but will not show a negative sign 5 Add weight tothe scale platform until the HOLD indicator appears on the display At this timeturning the P 1 Pot clockwise wi
50. ke of the vacuum pump 40084 Replacement Hose Gasket RA15425 RA15428 220 volt pump A 6 two stage rotary vane pump designed to pull moisture and air from an A C system 13203 Pump Oil 15369 Base and Foot Assembly RA19323 R 12 or RA19322 R 134a Oil Injector Assembly Controls the flow of oil from the injection bottle to the vehicle 113025 Oil Injector Check Valve RA19141 Oil Bottle RA19291 Replacement Valve ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual Component Descriptions RECYCLING 27 28 35 43 36 17506 R 12 or 34750 R 134a Refillable Refrigerant Tank Stores refrigerant to be recyded later RA19311 R 12 or RA19306 R 134a 36 Blue Tank Hose Allows flow from the liquid side of the tank tothe liquid solenoid 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit R 12 only 17773 Replacement R134a Quick Seal O Ring 40352 Schraeder Core Package of six 6 replacement Schraeder valves 107021 Liquid Line Strainer Filters liquid coming from the blue tank hose before going to solenoid This strainer is a filter screen that is installed between the liquid solenoid and the bulkhead fitting see page 32 for details RA19006 RA19088 220 volt Liquid Solenoid Allows flow to the expansion valve and recyde solenoid of the selected refrigerant type only RA19258 Solenoid Rebuild Kit
51. lay and the main board for continuity If they are okay replace the main board If the vacuum pump relay is powered recei v ing 110 220 volts tothe coil unplug the unit and check for continuity from 2 contact to 4 contact and 7 6 contact to 48 contact with an ohm meter There should be continuity on both sets of contacts with the ear on therelay depressed If thereis no continuity replace the vacuum pump relay Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL NOT RECYCLE 1 Check that all recovery tank hoses are RECYCLE PROMPT OFF connected properly and Schraeder cores COMPRESSOR OFF NO FLOW are depressed 2 Verify that the recovery tank valves are completely open 3 Check that there is a minimum of 6 pounds of refrigerant in the recovery tank 4 Install the low side of a manifold gauge set to the oil drain port see page 2 Step 2 Open the oil drain valve 5 If positive pressure is present at the oil drain port remove the cover and look for loose wires tothe vacuum sensor If there are loose wires check for continuity on the vacuum sensor If there is no continuity replace the vacuum sensor Inspect the orange wires between the main board and the vacuum sensor for continuity If the wires and the vacuum sensor have continuity jumper the orange wires together 7 Start recycling If the oil drain port is being pulled into a vacuum look for loose
52. ler to the oil drain port see page 2 Step 2 Open the oil drain valve 4 Close the low side manifold valve 5 Open the high side manifold valve 6 Verify that all tank hoses are properly attached to the recovery tank 7 Completely open both tank valves 8 Press RECOVER The compressor should start and the low side gauge should pull into a 17 vacuum If the display reads CH P press HOLD CONT Note The unit has low side clearing The low side gauge will pull to a 17 vacuum and start the recovery process recovery is engaged when the scale reading is displayed The low side gauge should pull to a 17 vacuum again and the unit will shut off 8 When recovery is complete the display will show a scale weight and then CPL 9 The low side manifold gauge should build positive pressure and a pressure transfer should be heard This is the result of the equalization solenoid opening If no pressure rise occurs the equalization solenoid and its tubing must be inspected for obstructions 10 Close the oil drain valve Disconnect the low side hose from the oil drain port and open the low side manifold valve 11 Press HOLD CONT the unit should recover to 17 of vacuum and shut off EVACUATION amp RECYCLING CHECK Note The recovery tank must have at least 6 pounds of refrigerant in it to perform this test 1 Open the high side manifold valve 2 Install the loose end of the low side hose to the oil dr
53. ll increase the amount you can put on the scale before the HOLD indicator appears Turning the P 1 Pot counterd ockwise will decrease the amount of weight allowed before HOLD appears 6 Set the P 1 Pot sothat with 73 pounds on the scalethe HOLD indicator just comes on L ift the weight on the scale and the HOLD indicator should disappear Note If the scale wont calibrate replace the scale Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 RA19008 Scale Specifications RA19008 Manufacturer Robinair Application 17700 Style Units Capacity usv er eat ata 50 Lb Tanks Control us a a Main PC Board Cable ean kee ger ante Gray color 4Pins 5 63 4 W 6 L Maximum Capacity 81 74 Lbs RA19008 Huntleigh 17700 Style Units utasa 50 Lb Tanks Gontrol ay Main PC Board Cable ee ete Black in color CORN ECON cc semen a RY Al es 4 Pins 5 53 2 W 71 2 L Maximum 81 74 L bs Datefirstused 7 29 93 This scale could give floating scale readings and should be replaced if giving questionable
54. ly wires for continuity If they have continuity replace the main board Remove the copper line running from the equalization solenoid to the nearest flare connection from the high side diversion solenoid Connect the center port of the hand held manifold to the port on the equalization solenoid Connect the high side of a hand held manifold gauge set to the open MFL fitting Close the high side manifold valve and start the self clearing mode If there is a pressure rise on the high side gauge dean or replace the high side diversion solenoid Verify that the vacuum pump is plugged in Check the power 110 220 volts at the vacuum pump receptacle If there is proper voltage check that the vacuum pump is not overfilled with oil If it is drain the oil from the vacuum pump then start and refill the vacuum pump properly If it is not replace the vacuum pump If thereis not proper power 110 220 volts remove the cover and look for loose wires Check for power 110 220 volts to the coil of the vacuum pump relay If there is no voltage inspect the wires between the vacuum pump relay and the main board for continuity If it is okay replacethe main board If voltage is present at the vacuum pump relay coil replace therelay 49 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual TROUBLESHOOTING UNIT WILL NOT PULL A VACUUM IN THE SECOND STAGE SELF CLEARING VACUUM IS NO
55. or Performs three functions Internal heat causes saturated vapor to evaporate This is important to insure that no liquid enters the compressor and that oil droplets contained in the refrigerant will drop out in the separator The third function will be discussed later 15 RA19291 Oil Drain Valve Allows the oil removed from the system to be drained when recovery is complete The same amount of oil should be returned during charging Note It is very important that the oil drain procedure be done after each recovery RA17419 Oil Drain Bottle 16 34430 Filter Drier Removes moisture acid and oil from the refrigerant 40084 Replacement Hose Gasket 23 RA19287 Recovery Check Valve 1 4 MFL x 1 3 Allows flow in one direction only and prevents refrigerant in the tank from coming back into the unit during shutdown 22 RA19198 R 12 Auto Air Purge Device Liquid refrigerant is circulated through the upper section during recycling to establish a reference pressure 22a RA19242 R 134a Auto Air Purge Device Liquid refrigerant is circulated through the upper section during recycling to establish a reference pressure 14 RA18760 System Oil Separator At this point high pressure high temperature vapor enters the separator and passes through a condensing coil The vapor cools and condenses by giving up heat tothe incoming refrigerant 20 RA17529 High Pressure Cut Out A normally closed sensor th
56. pressure greater than 25 psi is present in the system If the pressure is less then 25 psi in the recovery mode the display reads CH P In the vacuum mode the display reads U HI if the pressure is 25 psi or greater the A C system This indicates that a recovery procedure must be performed before attempt ing to vacuum RA19330 Suction Line Strainer Filters the refrigerant coming from the high and low side manifold valves before entering into the manifold assembly RA19320 RA19321 220 volt Manifold Assembly Block assembly that houses the recovery recyding charging and vacuum solenoids this manifold also houses the vacuum sensor and three check balls In the recovery mode solenoids 30 Vacuum 37 Recyding and 39 Charging are all dosed no power is supplied Note RA19258 Solenoid Rebuild Kits are availablefor all of the solenoids in this manifold block RA19236 Check Ball with Spring RA19258 Recovery Solenoid Rebuild Kit A normally closed solenoid designed to prevent the flow of refrigerant into the system oil separator while the unit is turned off or in any mode other then recovery RA17328 Vacuum Sensor A normally closed sensor designed to open when a 17 vacuum is reached the inlet manifold RA18760 System Oil Separator Performs three functions Internal heat causes incoming saturated vapor to evaporate This is important to insure that no liquid enters the compressor and tha
57. r authorization from Robinair is required Components Total Time RA18760 System Oil Separator 30 minutes RA19320 Manifold Assembly 45 minutes RA19258 Recovery Rebuild Kit 30 Minutes RA19258 Recyding Rebuild Kit 30 Minutes Note RA19258 Solenoid Rebuild Kit is the standard way of repairing a RA19006 solenoid If a solenoid must be replaced it must be described in detail on the warranty claim to justify its replacement and reimbursement Note Robinair considers filters to bea consumable item and they are not covered under warranty This includes parts and labor 57
58. rant type If the solenoid is not getting power inspect the control wires for continuity Repair or replace as necessary If the air purge solenoid is getting power proceed to Step 7 If the wires have continuity replacethe main board If the solenoid of the selected refrigerant type is receiving power 110 220 volts remove the air purge solenoid and verify that pressure is allowed through it when receiving power Clean or rebuild as necessary If theair purge solenoid is operating properly replacethe air purge device of the selected refrigerant type and re attempt recycling 45 ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual TROUBLESHOOTING UNIT WILL NOT CHARGE 1 NO PRESSURE ON GAUGES 2 Verify that the liquid tank valve is open Verify that the manifold gauge valves are completely open and unobstructed Inspect the liquid hose for proper installation and flow Verify that the Schraeder cores are depressed Verify that the main board has accepted the charge program Remove the units cover and look for loose wires Be surethe keypad is sending a program signal before replacing If the keypad is sending a signal an audible tone should be heard when the keys are pressed If the main board does not accept the program replace the main board Check the voltage at the charging solenoid If there is no voltage inspect the wires for continuity If the wires a
59. re okay replacethe main board If power 110 220 volts is going to the solenoid clean or rebuild the solenoid Verify that the liquid solenoid of the selected refrigerant type is receiving power 110 220 volts If there is no voltage check the wires for continuity If the wires have continuity replace the main board If thereis proper voltage to the solenoid rebuild or replace as necessary Verify that the liquid linestrainer is unobstructed see page 32 Replace or clean as necessary UNIT WILL NOT CHARGE 1 Verify that there is access tothe system PRESSURE ON GAUGES Verify that there is a minimum of 6 pounds of refrigerant in the recovery tank 3 Check that the scaleis ableto move freely 46 Verify that charging is being attempted through both the high and low side hoses and that proper adapters are being used Check for power 110 220 volts to the charging solenoid and see if the voltage is being eractically dropped to the charging solenoid If there 15 no voltage inspect the controlling wires for continuity Replace the main board if the wires have continuity Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL NOT CHARGE PRESSURE ON GAUGES CONTINUED UNIT WILL NOT COME OUT OF FIRST STAGE SELF CLEARING AFTER TEN MINUTES COMPRESSOR IS OFF Check for power 110 220 volts tothe liquid solenoid of the selected refrigerant t
60. s power tothe mating contact TROUBLESHOOTING Manual Override Ear Not Pulled In 1 Check for proper voltage to the 0 and 1 contacts If thereis proper voltage replacetherelay If there is not proper voltage replace main board Manual Override Ear Pulled In 1 Check for proper voltage from the power supply contact to the ground If there is not proper voltage check the voltage supply source 2 Check for proper voltage from the mating supply contact to the ground If there is not proper voltage replace relay Note Use of improper extension cord size can damage contact points RA17328 VACUUM SENSOR The vacuum sensor is a normally closed sensor If 17 2 rating is reached at the intake the switch opens and breaks the coil contacts shutting the unit off The contacts closed when anything above 17 is present in the lower cavity When 17 is achieved in the lower cavity the spring contact has room to force away from the mating contact TROUBLESHOOTING With pressure in the accumulator open the oil drain valveto ensure pressure is present the switch should have continuity If it does not replacethe switch If theunit is shutting off before reaching 17 rating inspect the inlet for obstructions before replacing the switch ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Components Specifications RA17529 HIGH PRESSURE CUT OUT The high pressure cut out is a normally closed
61. ssary see page 32 6 Install the low side of a manifold gauge set to the oil drain port see page 2 Step 2 Open the oil drain valve 7 Verify that the expansion valve calibration is at 35 psi always check the expansion valve pressure while recycling for ten minutes with at least 6 pounds of refrigerant in the tank 8 Inspect the filter for flow obstructions and leaks around the gasket area Note Fittings on quick disconnects should only be hand tight Replace gaskets if needed When installing gaskets be sureto lubricate them with vacuum grease or refrigerant oil as needed 9 Check the equalization solenoid for internal bleed through Clean or replace as necessary 10 If the compressor is not running verify that power 110 220 volts is being supplied to the compressor If the compressor is not receiving power check the wiring for continuity and the system relay for proper operation 11 If the compressor is receiving power 110 220 volts but not running inspect the compressor start components and check the amp draw refer to page 35 Replace the compressor as necessary 12 If the compressor is running check the compressor suction and discharge pressures The compressor should have 20 25 at the suction port and should build pressure to 150 psi on the discharge Replacethe compressor as necessary 44 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL
62. sure entering the high side hose RA19257 23 4 Replacement Gauge Lens RA19044 High Side Manifold Valve Allows flow from the high side hose to the center manifold port 10 11 41 30 31 32 33 RA19266 Vacuum Pump Protection Switch A normally open sensor that closes when pres sure greater than 25 psi is present in the A C system If the pressure is less then 25 psi in the recovery mode the display reads CH P In the vacuum mode the display reads 0 if the pressureis 25 psi or greater in the A C system This indicates that a recovery procedure must be performed before attempting to vacuum RA19330 Suction Line Strainer Filters the refrigerant coming from the high and low side manifold valves before entering into the manifold assembly RA19320 RA19321 220 volt Manifold Assembly Block assembly that houses the recovery recycling charging and vacuum solenoids this manifold also houses the vacuum sensor and three check balls In the evacuation mode solenoids 12 Recovery 37 Recyding and 39 Charging are all closed no power supplied Note RA19258 Solenoid Rebuild Kits are available for all of the solenoids in this manifold block RA19236 Check Ball with Spring RA19258 Vacuum Solenoid Rebuild Kit Normally closed solenoid designed to prevent flow to the vacuum pump during recovery or charging 111877 Vacuum Hose Provides flow from the vacuum solenoid to the inta
63. t it is closed and not bleeding through 4 Inspec the filter for flow obstructions and leaks around the gasket area Note Fittings on quick disconnects should only be hand tight Replace gaskets if needed When installing gaskets be sure to lubricate them with vacuum grease or refrigerant oil if needed 5 Install the low side hose coupler on the oil drain port with the low side valve closed see page 2 Step 2 for more details Open the oil drain valve Look at the psi reading If pressure is below 25 test the vacuum sensor for continuity If the vacuum sensor has continuity replace it If it doesn t check the vacuum sensor wires for continuity If the wires have continuity replacethe main board 6 Verify that the equalization solenoid is receiving power 110 220 volts from the main board If it is not receiving the voltage check the solenoid s power supply wires for continuity If they have continuity replace the main board 7 If the equalization solenoid is receiving power check the equalization solenoid for bleed through to the suction side of the compressor Clean or replacethe solenoid if it is bleeding through while receiving power 8 Check the compressor discharge and suction pressure refer to page 35 for detailed instructions The compressor should have 20 25 at the suction port and should build pressure to 150 psi on the discharge Replace the compressor as necessary 37 ORIGINAL 6 1 95 Ser
64. t oil droplets contained in the refrigerant will drop out in the separator The third function will be discussed later RA19291 Oil Drain Valve Allows the oil removed from the system to be drained when recovery is complete The same amount of oil should be returned during charging ORIGINAL 6 1 95 Series 12134 12135 12136 Service Manual 16 17 18 19 20 21 14 22 Component Descriptions Note It is very important that the oil drain procedure be done after each recovery RA17419 Oil Drain Bottle 34430 Filter Drier Removes moisture acid and oil from the refrigerant 40084 Replacement Hose Gasket RA19302 RA19314 220 volt Compressor Converts a low pressure entering gas into a high pressure exiting gas This is a 18 horse power oil less compressor T o help eliminate vibration this is a hose plumbed compressor with flare connections on the unit end of the hose RA17416 RA17516 220 volt Fan Assists in cooling the compressor during normal operation RA19331 RA19327 220 volt High Side Diver sion Solenoid A three way normally closed solenoid During normal operation the refriger ant passes through to the system oil separator ports 1 and 3 In the self clearing mode the solenoid is energized passing the refrigerant directly to the discharge solenoid of the selected refrigerant type ports 1 and 2 RA17529 High Pressure Cut Out normally dosed sensor th
65. to the low side on an R 134a system RA19115 Replacement Front O Ring Only RA19329 R 134a Low Side Hose Provides flow from the low side coupler to the low side port on the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring RA19309 R 12 96 Blue Hose Double Quick Seal Low side service hoseto the vehicle 18180 Replacement Quick Seal O Ring 40300 Quick Seal Repair Kit 40352 Schraeder Core Package of six 6 replacement Schraeder valves RA19279 RA19319 23 4 Low Side Gauge Usedtoread pressure entering the low side hose RA19257 23 4 Replacement Gauge Lens RA19044 Low Side Manifold Valve Allows flow from thelow side hosetothe center manifold port 18191A R 134a High Side Coupler red actua tor larger Allows access to the high side on an R 134a system RA19115 Replacement Front O Ring Only RA19328 R 134a High Side Hose Provides flow from the high side coupler to the high side port of the unit 14mm x 1 2 Acme Quick Seal 17773 Replacement R 134a Quick Seal O Ring 17772 Coupler O Ring 19308 12 96 Red Hose Double Quick Seal High side service hosetothe vehide 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit 40352 Schraeder Core Package of six 6 replacement Schraeder valves RA19280 RA19318 metric 23 4 High Side Gauge Used to read pres
66. ull 20 to 25 Compressor Won t Run 5 Replace the compressor as needed 1 Check for proper power 110 220 volts to compressor If there is not proper power discharge port Compressor Runs No Discharge 2 Take an amp draw of the compressor If it is drawing locked rotor amps replace 2 Besurethe intake and suction are not plugged the compressor 4 Start the compressor Note If there 15 amp draw inspect thestart 5 Pressure should build to 150 psi in about four components and replace if necessary minutes If pressure doesn t rise or reach at least 150 psi replace the compressor 35 ORIGINAL 6 1 95 Series 12134A 12135A 12136A Service Manual Tubing Schematic 111877 117275 LOW SIDE HIGH SIDE 117271 117273 1 c tm 117280 117267 1 1 1 117332 D 117270 117266 117272 117399 117325 117265 117274 117276 7 110327 H DISCHARGE 117324 117264 117434 117435 117282 117323 12134PL 36 Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL NOT COME OUT OF CL L COMPRESSOR RUNS 1 If the unit is being run through an extension cord eliminate its use 2 Disconnect the high and low side hoses couplers from the vehicle with the gauge valves open If the pressure on the gauges drops whilethe display says CL L the recovery solenoid needs rebuilt or cleaned 3 Check the oil drain valve verify tha
67. vapor side of the tank for the selected refrigerant type only RA19258 Solenoid Rebuild Kit RA19282 Recovery Check Valve 1 8 MPT x 1 8 MPT Allows flow in one direction only and prevents refrigerant in the tank from coming back into the unit during shut down RA19312 R 12 or RA19307 R 134a 36 Red Tank Hose Delivers refrigerant being recovered or recycled to the vapor side of the 50 Ibs tank 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit R 12 only 17773 Replacement R 134a Quick Seal O Ring 17506 R 12 or 34750 R 134a Refillable Refrigerant Tank Stores refrigerant to be recycled later RA19310 R 12 or RA19313 R 134a Air Purge Hose Supplies pressure from the top of the recovery tank to the air purge control 18180 Replacement R 12 Quick Seal O Ring 40300 Quick Seal Repair Kit R 12 only 17773 Replacement R 134a Quick Seal O Ring RA19006 RA19088 220 volt Air Purge Sole noids R 12 or R 134a Prevents flow of refrigerant into the lower cavity of the air purge device of the selected refrigerant type until energized 60 seconds after the recyding process has been engaged Note Power is dropped from the solenoid after 10 minutes of purging RA19258 Solenoid Rebuild Kit Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 Component Descriptions EVACUATION 1 18190A R 134a Low Side Coupler blue actua tor smaller Allows access
68. vapor tank hose for proper installation and obstructions 4 Verify that the vapor solenoid of the selected refrigerant type is receiving power 110 220 volts from the main board If itis not receiv ing the voltage check the power supply wires for continuity If they have continuity replace the main board 5 Inspect the wires between the high pressure cut out and the main board for continuity Repair or replace as necessary Series 12134 12135 12136 Service Manual ORIGINAL 6 1 95 TROUBLESHOOTING UNIT WILL NOT START OR COMPLETE A RECOVERY CONTINUED 6 Check the two amp fuse on the back of the main board for continuity Replace if necessary If the replacement fuse blows again inspect the compressor relay for shorted contacts and replace as necessary Inspect the recovery check valves for obstructions Repair or replace as necessary Replace the high pressure cut out and retest the unit Display Reads Full 1 4 Check thetank weight If thetank is full replacethe tank Recalibratethe scale if necessary Adjustment of the P 1 pot located on the main board see page 29 for location may be neces sary See Recalibrating the Scale on page 52 Verify that the scaleis connected properly Display Reads CPL 1 2 3 Verify that there is positive pressure the unit s manifold gauges If there is no positive pressure connect to a vapor supply source and
69. ype If there is no voltage inspect the controlling wires for continuity Replace the main board if the wires have continuity Verify that the liquid linestrainer is unobstructed see page 32 Replace or clean as necessary Close the high side valve Start the vehicle and pull in the remaining charge on the low side of the system When the remaining charge has been pulled from thetank the charging and liquid solenoid will close preventing a possible overcharge If theunit is being run through an extension cord eliminate its use Remove the shroud and look for loose wires Check for power 110 220 volts to the coil of the compressor relay energized If there is no voltage check the wires from the main board to the compressor relay for continuity If they have continuity replace the main board If the compressor relay is powered receiving 110 220 volts tothe coil unplug the unit and check for continuity from 2 contact to 4 contact and 6 contact to 8 contact with an ohm meter There should be continuity on both sets of contacts with the ear on therelay depressed If there is no continuity replace the compressor relay Check for voltage tothe compressor If thereis no voltage inspect the wires between the compressor and the compressor relay for continuity Repair or replace as necessary If voltage is present at the compressor check the compressor amp draw If it is drawing higher t

Series 12134A/12135A/12136A Recovery/Recycling/Recharging Unit

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