SERVICE MANUAL for MODEL AirV Rooftop Air
Contents
1. 3 2 Figure 3 5 Control Box Assembly Free Blow 3 2 Figure 3 6 Indoor Thermostat ee KARET EE GRS TCR Hace CC RE oos 3 3 Figu re 3 7 Air Sweep iode aske Gar deque xt n Es 3 3 Figure 3 8 Heat Strip Assembly 3 3 Figure 3 9 Filter Removal Ducted Unit 3 4 Figur 3 10 Ceiling Grill DUEted s ret Der e e EVI ONES tas 3 4 Figure 3 11 Control Box amp PCB 3 4 Figure 3 12 Control Box Assembly 3 5 Figure 3 13 Main Bisplay echa rw RR kat ke 3 5 Figure 3 14 Cover Assembly Standard 3 5 Figure 3 15 Control Box mb dx ae ER CRIT Eg Gere 3 6 Figure 3 16 Control Box 3 6 Figure 3 17 Water Cover 2 3 6 Figure 3 18 Upper Scroll Assembly 3 7 Figure 3 19 Motor Assembly atroces tari dieni ec e ID nh Pen KE di EI C ROT ha 3 7 Figure 3 20 S2. O OFF 1 ON 115 VAC SUPPLY LEGEND UPPER UNIT FOR ADDITIONAWIRING PLUG CONNECTS TO UPPER UNIT SEE DIAGRAM SUPPLIED WITH ASM AIR SWEEP MOTOR ASW AIR SWEEP SWITCH SW SWITCH IT INDOOR THERMOSTAT CEC CLOSED END CONNECTOR BT BIMETAL Figure 4 7 Heat Pump Ceiling Unit Free Blow 4 3 T 298 LEGEND CN HOUSING CONNECTOR PTC START THERMISTOR BLK OLP OVERLOAD PROTECTOR BLU RVC REVERSING VALVE COIL RED ODA Th OUTDOOR AIR THERMISTOR GRN YEL ODC Th OUTDOOR COIL THERMISTOR GRN YEL FAN MOTOR CONTROL BOX KC c H CAPACITOR COMPRESSOR OLP IF USED BLK BLU Ce VEL c Figure 4 8 Heat Pump Upper Unit Ducted PLUG CONNECTS TO CEILING UNIT SEE DIAGRAM SUPPLIED WITH CEILING UNIT FOR ADDITIONAL WIRING LEGEND PLUG CONNECTS TO UPPER UNIT NOTE IDC Th INDOOR COIL THERMISTER SEE DIAGRAM SUPPLIED WITH UPPER UNI EE RA Th ROOM AIR THERMISTER FOR ADDITIONAL WIRING FACTORY WIRING ODC Th OUTDOOR COIL THERMISTER FIELD WIRING ODA Th OUTDOOR AIR THERMISTOR MOTOR COMPRESSOR 115VAC HIGH VOLT RVC REVERSING VALVE COIL 2 13 4 211 FIELD WIRING D1 DIODE BLU GRN YEL 12VDC LOW VOL
3. RE Abt clare Bia ahi EUER he wk EET cR Rp CES 4 1 LIST OF FIGURES FIGURE NUMBER Page Figure 1 1 Model Serial Number Plate 2 1 1 Figure 1 2 Roof Unit Component Identification 0 nnn 1 3 Figure 1 3 Ceiling Unit Component Identification Free Blow 1 4 Figure 1 4 Component Identification Low Profile 1 5 Figure 1 5 Component Listing Ceiling Unit For Ducted Systems 1 6 Figure 1 6 Ducted System Air Flow Arrangement 1 7 Figure 1 7 Serial Number Locations 1 8 Figure 1 8 Refrigerant Flow Schematic Standard lt 1 9 Figure 1 9 Refrigerant Flow Schematic Heat Pump Cool Mode 1 10 Figure 1 10 Refrigerant Flow Schematic Heat Pump Heat Mode 1 11 Figure 3 1 Filter Removal Free Blow 3 1 Figure 3 2 Ceiling Grill Free 3 2 Figure 3 3 Ceiling Panel Assembly iecur avstengt CUN Ue Da ee ba 3 2 Figure 3 4 Ceiling Panel With Heat Option
4. 2 3 2 15 INADEQUATE HEAT HEAT PUMP 2 3 Clearing Diagnostic Alarms 2 3 SERVICE AND MAINTENANCE 3 1 3 1 PREVENTATIVE MAINTENANCE 3 1 3 2 SERVICE GENERAL fe UH DUET Aet ORAE RENI Get ENG 3 1 3 3 CEILING UNIT FREE BLOW SYSTEMS 3 1 3 31 Filter Removal Lataa e o CARE RA t e be UR 3 1 3 3 2 Ceiling Grill Removal iini Ak ume Las ume xe ERR E am dad s 3 1 3 3 3 Ceiling Panel Removal sumet Pete art Padre 3 2 3 3 4 Master Control S witch 225225222 eod ae mpg x EUR EXE EROR E ERROR CREE 3 2 3 3 5 AirSweep Switch Removal 3 2 3 3 6 Indoor Thermostat Removal 3 3 3 3 7 AirSweep Removal 2 2 3 3 3 3 8 HeatStrip Assembly Removal 3 3 TABLE OF CONTENTS Continued 34 CEILING UNIT DUCTED SYSTEMS 222 2 2 2 3 4 341 Filter Removal iiec x ERR 3 4 3 4
5. 4 3 Figure 4 8 Heat Pump Upper Unit Ducted 4 4 Figure 4 9 Heat Pump Ceiling Unit Ducted 4 4 LIST OF TABLES TABLE NUMBER Page Table 1 1 Model Chart Mein ad ge Le Mag Hed iR edes 1 2 Table 1 2 Additional Support Manuals 1 3 Table 2 1 System Self diagnostics Function Ducted Remote 2 4 T 298 SECTION 1 DESCRIPTION 1 1 INTRODUCTION This manual contains service instructions and electrical data for the AirV Carrier Transport Air Conditioning s Recreational Vehicle air conditioning unit The AirV units are two piece systems consisting of the Upper Unit and the Ceiling unit The Upper Unitcontains the refrigeration system while the Ceiling Unit contains the controls and vents The Ceiling Units are available in a free blow or ducted configuration The free blow units see Figure 1 2 deliver air to the vehicle by means of front and rear end vents and one downward vent air shower The vents may all be opened or closed to direct air as desired The front and rear vents are fitted with motorized dampers that oscillates to produce an air sweep effect These units may be fitted with optional electric heat The ducted units see Figure 1 5 and Figure 1 6 deliver air through built in the vehicle ceiling Th
6. OY Un gt NI a CN CN 1213141516178 1213415161718 RY4 FUSE GRN YEL Abs LEN mu RED Le 250V 3 15A DISPLAY PCB AS T 298 Figure 4 5 Ceiling Unit Standard Ducted 4 2 4 BLK AE 12 VDC POWER FAN MOTOR OLP OVERLOAD PROTECTION PTC START THERMISTER BLK fe RVC REVERSING VALVE COIL BLU GRN YEL WHT GRN YEL GRN YE COCO CONTROL EVAP BOX BLK BLU CAPACITOR COCOS 3 F USED eg Z 3 V FREEZE SWITCH COMPRESSOR E 2 5 QO 2 2 2 9 3 a SEE DIAGRAM SUPPLIED WITH CEILING UNIT FOR ADDITIONAL WIRING OOs Figure 4 6 Heat Pump Upper Unit Free Blow BLK SWITCH POSITION CONTACTS MADE BLU OFF NONE LOW FAN L1 L L1 A HIGH FAN L1 H L1 A LOW COOL L2 C L1 L L1 A B 3 HIGH COOL L2 C L1 H L1 A B 3 HEATING L2 HT L1 L L1 A B 1 HEATER AS HEATER BT
7. evaporator coil and accumulator The compressor raises the pressure and the temperature of the refrigerant and forces it through the discharge line into the condenser coil See Figure 1 8 The condenser fan circulates surrounding air which is at a temperature lower than the refrigerant over the outside of the coil tubes Heat transfer is established from the refrigerant inside the tubes to the air flowing over the tubes The tubes have fins designed to improve the transfer of heat from the refrigerant gas to the air This removal of heat causes the refrigerant to liquefy thus liquid refrigerant leaves the coil and flows through a strainer to the capillary tube The strainer removes any impurities within the refrigerant system The capillary tube meters the flow of liquid refrigerant to the evaporator coil As the refrigerant flows through the capillary tube there is a reduction in pressure and temperature 1 9 The evaporator blower fan pulls vehicle air through the filters which remove particulate matter and then pass the cleaned air through the evaporator coil The low pressure low temperature liquid that flows into the evaporator coil tubes is colder than the air that is circulated over the tubes Heat transfer is established from the vehicle air flowing over the tubes to the refrigerant flowing inside the tubes The evaporator coil tubes have aluminum fins to increase heat transfer from the air to the refrigeran
8. Heat Cool Model 4 5 T 298 A Air Handling S ystem 3 8 Air Sweep Removal 3 3 Air Sweep Switch 3 2 C Capacitor Testing 3 9 Capacitor Testing and Replacement 3 9 Ceiling Grill Ducted 3 4 Ceiling Grill Free Blow 3 1 Ceiling Panel Free Blow 3 2 CEILING UNIT DUCTED SYSTEMS 3 4 CEILING UNIT FREE BLOW 3 1 Cleaning 3 1 Compressor 3 6 3 13 Condenser Fan 3 7 Control Box Ducted 3 4 Control Box Upper Unit 3 6 Controls 3 1 Cool Only Thermostat 3 15 D Design Change 1 1 Evaporator Blower Wheel 3 8 Exterior Cover 3 5 3 10 3 15 F Filter Removal Free Blow 3 1 Filter Removal Ducted 3 4 Fuse Removal Ducted 3 5 H Heat Strip 3 3 Heat Cool Thermostat 3 15 INDEX Index 1 Indoor Thermostat 3 3 INTRODUCTION 1 1 4 1 LCD DISPLAY 3 15 3 16 Leaks 3 1 Main P cb Board 3 5 Master Control S witch 3 2 Motor 3 7 Mounting 3 1 Painting 3 1 PCB Display 3 5 PREVENTATIVE MAINTENANCE 3 1 R REFRIGERANT CYCLE 1 9 1 10 S Serial Number 1 1 SERVICE GENERAL 3 1 SERVICE UPPER UNIT LOW PROFILE 3 10 SERVICE AND MAINTENANCE 3 1 START UP 1 9 T THERMOSTAT INSTALLATION AND START UP IN STRUCTIONS WALL MOUNTED 3 15 TROUBLESHOOTING 2 1 2 3 U Upper Scroll Assembly 3 7 3 10 3 11 3 12 3 13 W WIRING SCHEMATICS 4 1 T 298 VG H c Carrier Transport Air Conditioning Carrier 50 Grumbacher R oad A Unite
9. Scroll Assembly Upper 8 Scroll Assembly Lower Condenser Fan 9 Evaporator Coil Condenser Motor 10 Compressor Evaporator Motor ll Base Pan Assembly Evaporator Blower Wheel See Figure 1 3 for Ceiling Package Free Blow Figure 1 4 Component Identification Low Profile Upper Unit 1 5 T 298 l Telescoping Divider 3 different sizes available 7 Remote Control Assembly 2 Divider Assembly 8 Remote Control Bracket Assembly 3 Frame Panel Insulation Assembly 9 Filter Assemblies 2 4 Control Box Assembly 10 PCB Cover 5 Control Box Cover 11 PCB Main Assembly 6 Suction Packing Assembly 12 PCB Display Figure 1 5 Component Listing Ceiling Unit For Ducted Systems T 298 1 6 SCHEMATIC VIEW SUPPLY AIR SUPPLY AIR RETURN AIR INSTALLED VIEW l Vehicle Duct System Connection 4 Control Box Assembly 2 Telescoping Divider 3 different sizes available 5 Supply Air Discharge Area 3 Return Air Suction Area Figure 1 6 Ducted System Air Flow Arrangement 1 7 T 298 Upper Unit Serial Number of Ceiling Unit Ceiling Unit Cover Removed Free Blow Type Serial Number of Ceiling Unit Ceiling Assembly F rame Side of Control Box Bottom of Upper Unit Serial Number of Upper Unit Bottom View After Installation Ducted Type With Grille Removed Figure 1 7 Serial Number Locations T 298 1 8 1 4 AirV SYSTEM COMPONENT SPECIFI CATIONS 1 4 1 Refrigerant Charge Standard H
10. 115 1 60 Heat Cool 68RV0010BB 99 00469 26 115 1 60 Heat Cool 68RV0040MA 99 00469 22 115 1 60 68RV0010DB 99 00469 29 115 1 60 oet Ns T 298 1 2 Table 1 2 Additional Support Manuals MANUAL FORM NO EQUIPMENT COVERED TYPE OF MANUAL For PART NO 99 00469 00 71LC6A54310 AirV 115 Volts Free Blow Cool Only 99 00469 01 EM 99 00469 02 71LH6A54070 AirV 115 Volts F ree Blow Heat Cool Owner s Guide 99 00469 03 71LD6A54070 AirV 115 Volts Ducted Cool Only 99 00469 06 x 99 00469 08 71LH6A54070 AirV 220 Volts F ree Blow Heat Cool 251016500 99 00469 11 71RQ6A5401A AirV 115 Volts F ree Blow Heat Pump 99 00469 12 71DQ6A5401A AirV 115 Volts Ducted Heat Pump 99 00469 13 71DW6A54070 AirV 115 Volts Ducted Wired Thermostat 99 00469 22 i 99 00469 23 71LC6A54310 AirV 115 Volts Free Blow Cool Only 99 00469 24 99 00469 25 71LH6A54070 AirV 115 Volts Free Blow Heat Cool 99 00469 26 71RW6A54310 115 Volts F ree Blow Wired Thermostat 99 00469 29 T 298PL 62 50455 00 Basic refrigeration 1 Cover 4 Compressor 2 Condenser 5 BasePan 3 Evaporator Figure 1 2 Roof Unit Component Identification 1 3 T 298 Control Assembly Ceiling Grill Assembly 3 4 Ceiling Panel Assembly Control Box Cover 1 2 Figure 1 3 Ceiling Unit Component Identification Free Blow 1 4 T 298 1 2 3 4 5 6 Cover Assembly 7 Condenser Coil
11. 2 Ceiling GT Removal wees es ed DU RAE 3 4 3 4 3 Control Box Assembly 3 4 3 4 4 Main Board 4 3 5 3 4 5 PCB Display Removal var eck chee RR ar ERRARE ER E E Ra ep E 3 5 REMOVal ata eti ei E pet d desee Med etra d ate 3 5 35 SERVICE UPPER UNIT STANDARD HC amp HP 3 5 3 5 T Exterior Cover Removal voler DER eerte ence A E Perros 3 5 3 5 2 Compressor 3 6 3 5 3 Control Box Assembly 3 6 3 5 4 Upper Scroll Assembly Removal 4 3 7 3 5 5 Motor Assembly and Condenser Fan Removal 3 7 3 5 6 Evaporator Blower Wheel Adjustment or Removal 3 8 3 5 7 Air Handling System Removal 4 3 8 3 5 8 Capacitor Troubleshooting 2 2 3 9 3 5 9 Capacitor Testing and Replacement 3 9 3 5 10 Positive Temperature Coefficient Thermister P TC Start Thermistor Troubleshooting 3
12. 3 30 Condenser Fan Assembly amp Retaining Ring Figure 3 29 Upper Scroll amp Control Box Cover Removed Figure 3 31 Condenser Fan Motor 3 6 3 Condenser Fan Assembly Removal amp Fan Assembly Stop To remove condenser fan assembly do the following a Perform steps outlined in Section 3 6 2 b Depress and remove Retaining Ring See Figure 3 30 Using both hands carefully pull up on fan assembly until it is free of the motor shaft d When replacing the fan assembly make sure the fan assembly is against the stop on the shaft See Figure 3 31 e Push back on tab to allow fan assembly to rest against stop See Figure 3 32 Fan assembly will now be flush with the end of the motor shaft Figure 3 32 Condenser Fan Motor f Reverse above procedure for reassembly amp Fan Assembly Tab 3 11 T 298 3 6 4 Condenser Motor Removal To remove condenser fan motor do the following a Perform steps outlined in Section 3 6 2 b Remove 3 13MM bolts See Figure 3 31 c Remove 3 Grommets Inspect replace or reuse d Cut Tie Wraps amp discard 2 locations When re assembling tie wrap at same 2 locations e Remove ground wire from compressor bracket See Figure 3 33 f Un plug yellow brown white from control box as sembly Reverse above procedure for reassembly Cond Motor OE round Screw 2 I z 2 20 Comp Mounting Bo J Figure 3 33 Condenser Moto
13. 3 7 Air sweep motor 3 3 8 Heat Strip Assembly Removal To remove the heat strip assembly Figure 3 8 do the following a Remove ceiling grille Refer to paragraph 3 3 2 b Unplug electrical connection at air sweep motor as sembly c Remove two screws securing heat strip assembly to the ceiling panel assembly d Slide heatstrip assembly away from air me motor assembly and pull down easing the the electrical connection through the access hole e Reverse the procedures for reassembly Figure 3 8 Heat Strip Assembly T 298 3 4 CEILING UNIT DUCTED SYSTEMS c Remove two screws securing control box cover to control box assembly See Figure 3 11 3 4 1 Filter Removal The filters UIS 3 9 are located in the ceiling grill To remove the filters do the following d Remove control box assembly cover a Grasp the edge ofthe filter at recess in the end of the ceiling grill o Pull filter completely out of the filter slot c Vacuum filter or wash filter in luke warm water Shake off excess water and dry thoroughly d Replace filter by sliding the filter into the filter slot in the ceiling grill until the filter frame is flush with the in terior grill i Figure 3 10 Ceiling Grill Ducted ri IN Disconnect blue furnace wires WII NT Unplug two connectors from upper unit nnm Unplug DC power plug 1 red yellow black wires D Arv See Figure 3 12 Unplug relay signal plu
14. EZ QE Wa JA c 2 0 LL GE 2 o2 4 0 az ud z 54 z C LEGEND YE ur USED OLP OVERLOAD PROTECTION PTC START THERMISTER J TB JOINT TERMINAL BLOCK FMC INDOOR FAN MOTOR CAPACITOR COMPRESSOR Figure 4 2 Upper Unit Schematic Low Profile 4 1 T 298 115 VAC SUPPLY 115 VAC SUPPLY WIRE LEGEND IDC Th INDOOR COIL THERMISTER RA Th ROOM AIR THERMISTER KY RELAY DI DIODE CONTROL PCB ASS Y 3 4 WHT 77 1 GRN YEL BL PLUG CONNECTS TO UPPER UNIT SEE DIAGRAM SUPPLIED WITH UPPER UNIT FOR ADDITIONAL WIRING SWITCH POSITION CONTACTS MADE or LEGEND ASM AIR SWEEP MOTOR ASW AIR SWEEP SWITCH IT INDOOR THERMOSTAT SWITCH POSITION CONTACTS MADE NONE LOW FAN HIGH FAN L1 H L1 A E z SE c usz a a 5 Fa 5 G gt 2 Sa o 9 og o B 5 2 awn UPPER UNIT FOR ADDITIONAL WIRING LOW COOL L2 C L1 L L1 A B 3 HIGH COOL L2 C L1 H L1 A B 3 HEAT L2 HT L1 L L1 A B 1 LEGEND ASM AIR SWEEP MOTOR O 2 Az 2 B ASW AIR SWEEP SWITCH SW SWITCH IT INDOOR THERMOSTAT CEC CLOSED END CONNECTOR BT BIMETAL BLK 115 VAC POWER WHT sa alu jour sli
15. Evaporator Motor Locking 3 12 Figure 3 35 Evaporator Motor Blower Assembly In Cradle 3 12 Figure 3 36 Evaporator Blower Wheel Flush With End Of 3 13 Figure 3 37 Control Box Assembly With Capacitor 3 13 Figure 3 38 Remote Control Components 3 14 Figure 3 39 Remote Control PCB FR9 Location 2 2 2 2 3 14 Figure 3 40 Wall Thermostat Wiring Diagram Cool Only Model 3 17 Figure 3 41 Wall Thermostat Wiring Diagram Heat Cool Model 3 18 Figure 4 1 Upper Unit Schematic Standard 4 1 Figure 4 2 Upper Unit Schematic Low Profile 4 1 Figure 4 3 Ceiling Unit Schematic Cooling Only 4 2 Figure 4 4 Ceiling Unit Schematic Heat Cool 0 nen 4 2 Figure 4 5 Ceiling Unit Standard Ducted 4 2 Figure 4 6 Heat Pump Upper Unit Free Blow 4 3 Figure 4 7 Heat Pump Ceiling Unit Free Blow
16. LED light flashes 5 times 2 Unit cools for a few moments then stops cooling 1 Check 115 volt AC power source Momentarily disconnect 12 VDC power source Disable compressor malfunction test switch Check AMP draw Check AT Remove grill verify evaporator coil probe is inserted into coil Check AMP draw Check AT Replace unit 2 44 COMPRESSOR POWER SUPPLY OPEN 1 Loose leads at compressor terminals 2 Defective motor overload switch 3 Defective capacitor 4 Open compressor windings 5 Seized compressor 6 Capacitor incorrectly wired 1 Loose lead at fan motor 2 Defective or burned out motor 3 Outdoor air restricted or recirculating 4 Overcharge or noncondensables in system 5 Restricted discharge line 6 Defective motor overload switch Tighten leads Replace switch Replace capacitor Refer to Paragraph 3 5 8 Replace compressor Replace compressor Verify capacitor wiring Refer to wiring diagram Tighten lead Replace motor Check for dirty condenser coil proper clearance around unit remove any obstructions Check AMP draw Check for obstruction in line Check A T Replace unit Replace switch T 298 SYSTEM AND PROBABLE CAUSE PROBABLE REMEDY 6 CYCLES ON COMPRESSOR OVERLOAD 1 Defective run capacitor 1 Replace capacitor Refer to Paragraph 3 5 8 Defective compressor bearings or valves Replace unit restricted evaporator air iced evap
17. alcove 3 7 4 Install Thermostat 12VDC a Turn off all power to unit b If an existing thermostat is being replaced 1 Remove existing thermostat from wall 2 Disconnect wires from existing thermostat one at a time Be careful not to allow wires to fall back into the wall 3 As each wire is disconnected record wire color and terminal marking 4 Discard or recycle old thermostat NOTE Mercury is a hazardous waste and mustbe des posed of properly C Seperate the front and back pieces of plastic d Route thermostat wires through hole in back piece of plastic Level plastic against wall for aesthetic value only thermostat need not be leveled for proper op eration and mark wall through 2 mounting holes e Drill two 3 16 inch mounting holes in wall where marked NOTE Mounting holes on thermostat are designed to fit on a horizontal J Box f Secure back plastic to wall with 2 anchors and screws making sure all wires extend through hole in plastic g Connect wires to proper terminal of the connector block in the front piece of plastic h Pusr any excess wire back into wall Excess wire in side the thermostat plastic case can interfere with air flow across the temperature sensor Seal ole in wall to prevent air leaks Leaks can effect op eration i Snap front and back pieces of plastic together j Turn on power to the unit 3 8 LCD DISPLAY 3 8 1 Cool Only Thermostat Part No 1
18. control assembly Item 2 Figure 1 3 to the control box cover Remove the master control switch knob by grabbing the outside edge of the knob and pulling it off of the switch stem z remove the ceiling panel Figure 3 3 do the Remove 2 screws securing the master control switch ollowng to the control assembly a Remove the ceiling grill Refer to paragraph 3 3 2 Carefully disconnect wires from the master control switch Label wires to aid in reassembly Reverse above procedure for reassembly Figure 3 2 Ceiling Grill Free Blow 3 3 3 Ceiling Panel Removal b Remove 5 screws securing the duct plate to the ceil ing panel h c Remove 4 mounting bolts making sure to Support the i i i weight of the ceiling panel ye ES Weep WIRT d Disconnect the unit harnesses and main power wires al from the ceiling panel e Lower the ceiling panel from the air conditioning unit f Reverse above procedure for reassembly Air Sweep Cam Master Control S witch Duct Plate amp Figure 3 5 Control Box Assembly Free Blow Holes 3 3 5 Air Sweep Switch Removal To remove the air sweep switch do the following a Remove ceiling grill Refer to paragraph 3 3 2 b Remove 5 screws securing the control assembly Function Box Item 2 Figure 1 3 to the control box cover c Disconnect wires from the air sweep switch d Pinch tab
19. heattransfer from the air to the refrigerant therefore the cooler air is circulated to the interior of the vehicle The transfer of heat from the air to the low temperature liquid refrigerant in the indoor coil causes the liquid to vaporize This low temperature low pressure vapor passes into the accumulator The accumulator is designed with the inlet tube delivering refrigerant to the bottom of the tank and the outlet tube taking refrigerant form the top ofthe tank This arrangement ensures that only vapor refrigerant is returned to the compressor where the cycle repeats When ventilation only is selected the indoor fan functions to circulate air throughout the vehicle The refrigerant cycle will remain off mmm DISCHARGE LIQUID cm SUCTION ami ia REVERSING VALVE CAPILLARY INDOOR COIL TUBE STRAINER LLL SJ COMPRESSOR OUTDOOR COIL Figure 1 10 Refrigerant Flow Schematic Heat Pump Heat Mode 17 2 Heating The heating cycle is energized when the thermostat located in the ceiling unit calls for heat The system controls are positioned for reverse refrigerant flow with the compressor discharge delivered to the indoor coil and liquid delivered to the outdoor coil See Figure 1 10 The main components of the system are the compressor reversing val
20. turned on e g if Y output is turned on for 9 minutes and then satisfies it cannoutturn back on for another 6 I Factory Wiring 4 UPPER UNIT J Motor Comp POWERBOX ASSEMBLY CEILING UNIT r L minutes regardless of demand However pressing UP and FAN buttons simultaneously or changing the set point will override the timer for 1 cycle 3 11 4 Minimum On Timer Oncethe ene turned on it will remain on fora minimum of 2 minutes regardless of demand However the equipment can turn off in less than 2 minutes if a change in set point or a changein mode occurs 3 11 5 Error Messages E4 will be displayed if the thermostat has an internal memory failure If E4 appears replace the thermostat two dashes will be displayed if the thermostat cannot properly read the room temperature If appears replace the thermostat 115V AC High Voltage Power Supply THERMOSTAT 12VDC LowVoltage Power Supply Figure 3 40 Wall Thermostat Wiring Diagram Cool Only Model 3 17 T 298 alr Factory Wiring UPPER UNIT E Motor Comp 115V AC High Voltage Power Supply THERMOSTAT POWERBOX ASSEMBLY COOL Compressor FAN High FAN Low 12VDC LowVoltage Power Supply 12VDC 12 VDC Gnd CEILING UNIT FURNACE Figure 3 41 Wall Thermostat Wiring Diagram Heat Cool Model T 298 3 18 SECTION 4 WIRING SCHEMATICS 4 1 INTRODUCTION This Section contains wiring schematics for the
21. valve air cooled outdoor coil strainer capillary tube indoor coil and the accumulator The compressor raises the pressure and the temperature of the refrigerant and forces it through the discharge line and reversing valve into the outdoor coil The outdoor fan circulates surrounding air which is ata temperature lower than the refrigerant over the outside of the coil tubes Heat transfer Is established from the refrigerant inside the tubes to the outdoor air flowing over the tubes The tubes have fins designed to improve the transfer of heat from the refrigerant gas to the air this removal of heat causes the refrigerant to liquefy thus liquid refrigerant leaves the coil and flows through the strainer to the capillary tube The strainer removes any impurities within the refrigerant system The capillary tube meters the flow of liquid refrigerantto the indoor coil As the refrigerant flows through the T 298 capillary tube there is a reduction in pressure and temperature The indoor blower fan pulls inside air through the filters which remove particulate matter and then pass the cleaned air through the indoor coil The low pressure low temperature liquid that flows into the indoor coil tubes is colder than the air that is circulated over the tubes Heat transfer is established from the indoor air flowing over the tubes to the refrigerant flowing inside the tubes The indoor coil tubes have aluminum fins to increase
22. 110 421 On power up the LCD readout will display C Cool Only 3 8 2 Heat Cool Thermostat Part No 1110 420 On power up the LCD readout will display HC Heat Cool 3 9 SET THERMOSTAT CONFIGURATION While in configuration mode three option choices can be made A Anticipator Value Adjustment d Display Temperature Fahrenheit Celcius Selection oF Offset Adjustment For Room Temperature 3 9 1 Enter Configuration Mode Enter and hold the FAN button for approximately 10 sec onds until room temperature disappears and the display reads A You are now in the configuration mode T 298 NOTE Ifthe FAN button is pressed again or if no button is pressed for two minutes the thermostat will exit the configuration mode and return to nor mal operation To re enter the configuration mode the FAN button must be pressed and held for 10 seconds again While in the configuration mode the following options are available A ANTICIPATOR Value Adjustment This adjustment controls the sensitivity and cycle rate of the thermostst Higher numbers decrease the sensitivity and slow the cycle rate Lower numbers increase the sensitivity and increase the cycle rate However a limiting feature will not allow more than 4 equipment cycles per hour regardless of setting Values can range from 1 to 3 Factory default setting is 2 This default selection will provide optimum performance in nearly all installations Try itfirst Do not
23. 3 17 Water Cover Removal 3 5 4 Upper Scroll Assembly Removal a exterior cover assembly Referto paragraph b Remove 4 screws securing upper scroll assembly to the lower scroll assembly See Figure 3 18 Gently pry 4 snap clips open and lift the upper scroll assembly off of the lower scroll assembly d Reverse above procedure for reassembly Screws 4 Places Figure 3 18 Upper Scroll Assembly 3 5 5 Motor Assembly and Condenser Fan Removal a Remove exterior cover assembly Referto paragraph 3 5 1 b ias control box assembly Refer to paragraph C upper scroll assembly Refer to paragraph d Remove 4 screws securing the condenser cover to the condenser orifice See Figure 3 24 e Carefully disconnect motor wire terminations from within the control box f Remove 1 screw securing the motor ground lead to the motor bracket assembly See Figure 3 19 g Using flat nosed pliers depress the motor spring clamp and slide it off of the condenser fan See Figure 3 20 h Liftand slide motortowards evaporator coil to remove condenser fan from the motor shaft i Remove condenser fan from motor shaft and lift fan out through the top of the condenser orifice See Figure 3 22 j Remove motor assembly k Reverse above procedure for reassembly Motor Ground Lead Figure 3 21 Motor Clip Removal T 298 X Vy E E Figure 3 22 Condenser Fan Removal 3 5 6 Evapora
24. 9 3 5 11 Eine Voltage s 11096 atc Dc edet eU COR ET RI TRUE ONCE ERE nce 3 9 36 SERVICE UPPER UNIT LOW PROFILE 2 3 10 3 6 1 Exterior Cover 3 10 3 6 2 Upper Scroll Assembly Removal 3 10 3 63 Condenser Fan Assembly 3 11 3 6 4 Condenser Motor Removal 4 3 12 3 6 5 Evaporator Motor Blower Assembly Removal 3 12 3 6 6 Compressor 3 13 3 6 7 Capacitor Removal iubes ru AER MEER RI DM pU RE petias 3 13 3 6 8 Remote Control Fahrenheit to Celsius 3 13 3 7 THERMOSTAT INSTALLATION AND START UP INSTRUCTIONS WALL MOUNTED 3 15 3 7 1 ntroductiori ood reete e eter ee ien Cp 3 15 31 2 Installation PRIOR RR Gs DERE AER UA 3 15 3 7 3 Thermostat e HRS DENEN ARR RR HR FCU 3 15 3 74 Install Thermostat 12VDC donate gu err RP ED E ad ERE AE d 3 15 3 9 ECD DISPLAY seio weed Rh etinm e ttp keel Mag ere haben Gon e Pe E Gh 3 15 3 8 1 Cool Only Thermostat 22 eee reno eck CERT ee ba EGRE TO
25. AirV units Figure 4 1 is the schematic for the standard upper unit assembly and it is applicable to all standard units Figure 4 2 is the schematic for the Low Profile upper unit assembly Figure 4 3 is the schematic for a free blow ceiling unit without heat while Figure 4 4 is a free blow unit with heat Figure 4 5 is for a ducted unit with microprocessor control Figure 4 6 is for an Upper Unit Heat Pump with free blow application and Figure 4 7 is the matching free blow ceiling unit Figure 4 8 is for the Upper Unit Heat Pump ducted application and Figure 4 9 is the matching ducted ceiling unit Note thatthe ducted units have 115 VAC powerforthe components and 12 VDC powerforthe microprocessor control System Figure 4 10 is forthe ducted orfree blow application thatuses a wall mounted thermostat with or withoutthe furnace option Where applicable diagrams that designate 115 Volt 60 H 1 Phase are also available using 220 Volts 50H 1 Phase Most noteably Figure 4 1 and Figure 4 5 FAN MOTOR PLUG CONNECTS TO CEILING UNIT SEE FIG 4 3 OR 4 4 OVERLOAD PROTECTOR IF Used UNIT 99 00468 10 INDOOR FAN MOTOR op GRN YEL OUTDOOR FAN MOTOR Soo Ww 79 CAPACITOR Elk QO E 2 2 9 2 m LLI LLI 2 2 o 3 Id lt
26. COIL 0 5 sec 3 FAN Mode THERMISTOR FAIL FURNACE Mode URE 3sec OUTDOOR COIL 0 5 sec 4 FAN Mode THERMISTOR FURNACE Mode FAILURE REVERSING VALVE FAN Mode E MA DRIV FUNCTION L FURNACE Mode DISCHARGE AIR FAN Mode THERMISTOR FAIL FURNACE Mode 2 3 4 5 1 URE THE RMISTOR 0 5 sec Continu Continuous WIRING WRONG s only in cooling test mode If more than two errors occur the highest ranked code is displayed If the highest ranked error is cleared the next highest ranked error code is displayed FAN Mode 4 COMPRESSOR m FAN Mode Tipass MALFUNCTION RURNAGE Mode 135 T 298 2 4 SECTION 3 SERVICE AND MAINTENANCE 3 1 PREVENTATIVE MAINTENANCE Cleaning Clean evaporator coil and condenser coil Hold flashlight behind coil to see if all spaces are clear Dust accumulation obstructs or reduces airflow and results in loss of cooling capacity Both coils may be vacuumed when dry Coils may also be brushed with a stiff brush and then blown out with compressed air Thoroughly clean base pan motors fan wheels and other components Clean cover and ceiling grill Mild detergents reduce electrostatic charges on plastic sections of the grill and are good cleaners AA CAUTION Do not use carbon tetrachloride solvents or waxes containing solvents to clean plas tic sections Painting Paint any parts that show evidence of rust with a good rust prevention
27. Change settings unless there is evidence of need to do so Unlike conventional anticipators this setting is not determined by current draw There is no need to measure know or compensate for current To Adjust a Enter configuration mode if not already there b Use UP amp DOWN buttons to display A Press MODE button once to display current value d UseUP amp DOWN buttons to move between values e Press MODE buttonto return to A UP amp DOWN buttons now move between option choices A d oF or press FAN button to exit configuration mode d Fahrenheit Celsius Selection This selection operates the thermostat in either Fahrenheit or Celsius To Select a Enter configuration mode if not already there b Use UP amp DOWN buttons to display d c Press MODE button once to display current selection of F or C d UseUP amp DOWN buttons to change between F amp C e Press MODE buttonto return to d UP amp DOWN buttons now move between option choices or press FAN button to exit configuration mode oF Room Temperature O ffset Adjust Selection The selected number is the number of degrees plus or minus which will be added to the actual temperature The numbers can range between 5 and 5 Factory default is 0 This adjusted value will be used as actual temperature for both display and control action The effect is that a positive number selection will make the room temperature lower and vice versa T
28. Connecta nitrogen supply to the unitatone ofthe line tap valve connectors 5 psig maximum flow leav ing the other connector open to the atmosphere Braze angle valves with stubs to each process tube f Remove compressor from unit 3 bolts Remove line tap valves from suction and Rr lines Carefully braze the holes closed from where tne line tap valves were removed Clean system add orreplace liquid line filter drier F or proper and flushing use a UL approved re frigerant recycling system i Install new compressor and braze into place with field supplied copper slip couplings j Connect wiring replace wire terminals if necessary k Proceed with evacuation and charging 15 9 OZ 45 KG R22 P inch off lines where angle valves were added Cut off angle valves above pinch off and braze tubes I Start up unit 3 5 3 Control Box Assembly Removal To remove the control box assembly do the following a exterior cover assembly Referto paragraph 2 b Remove 2 screws securing control box assembly to the lower scroll assembly SeeFigure 3 15 T 298 3 6 Figure 3 16 Control Box Removal c Slide control box out of the lower scroll assembly See Figure 3 16 d To open control box remove 2 screws securing the water cover to the control box cover e Gently lift the water cover off of the control box See Figure 3 17 f Reverse above procedure for reassembly Figure
29. EM 1 9 17 REFRIGERANT 1 10 L GOONG aia Aiii ume eR Ir nies c ile b e is e e pad 1 10 1 7222 He tirig ud mI ce eR dte Rete ut ru ee e RO t pad 1 11 TROUBLESHOOTING 2 1 2 1 NOPOWER TO UNIT eR ERR eR dag ket 2 1 22 DUCTED UNIT WILL NOT OPERATE 2 1 2 3 DUCTED UNIT WILE NOT COOL ote ctum e me Se eerte OR CR etin 2 1 2 4 COMPRESSOR POWER SUPPLY OPEN 2 1 2 5 COMPRESSOR RUNS BUT CYCLES FAN OPERATING ERRATICALLY 2 1 2 6 CYCLES ON COMPRESSOR OVERLOAD 2 2 2 7 INSUFFICIENT COOLING COOLING AIR NOT ADEQUATE 2 2 2 8 CONDENSER AIR NOT 2 2 2 09 INSUFFICIENT COOLING irse eR ven edni on ee TAE DR eder DRE TERES x 2 2 2 10 COMPRESSOR FLOODING 2 22 2222 ea DRIED ER each E VETERES 2 2 2 11 HEATER CYCLES ON LIMIT SWITCH HEAT COOL VERSION 2 2 2 12 AIR SWEEP NOT WORKING FREE BLOW VERSION ONLY 2 2 2 13 WATER LEAKAGE sp hasta E cater e mee st twr ee m COE es 2 2 2 14 INADEQUATE HEAT FREE BLOW HEAT ONLY
30. NSTRUCTIONS WALL MOUNTED 3 7 1 Introduction The thermostat is a wall mounted low voltage thermostat which maintains room temperature by controlling the operation of a heating and air conditioning system Batteries are not required temperature and mode settings are preserved with the power off AA CAUTION Improper wiring orinstallation may damage thermostat Wiring must conform to local and national electrical codes AA WARNING Before installing thermostat turn off all power to unit There may be more than one power disconnect Electrical shock can cause personal injury or death 3 7 2 Installation NOTE Read allinstructions before starting the installa tion NOTE The thermostat requires no batteries The ther mostat is not a power stealing device and MUST have both R and C connected 3 7 3 Thermostat Location The thermostat should be mounted Approximately 5 foot 1 5m from the floor Close to or in a frequently used room preferably on an inside partitioning wall On a section of wall without pipes or duct work The thermostat should NOT be mounted Closeto a window oran outside wall or nextto a door leading to the outside Exposed to directlight and heatfrom a lamp sun fire place or other temperature radiating object which may cause a false reading Close to or in direct airflow from supply registers and return air grilles In areas with poor air circulation such as behind a door or in an
31. R 3 15 3 8 2 Heat Cool Thermostat 3 15 39 SET THERMOSTAT CONFIGURATION 2 3 15 3 9 1 Enter Configuration Mode 3 15 3 10 CHECK THERMOSTAT OPERATION 3 16 3 10 1 Fan Operation Cool 122 2 4 3 16 3 10 2 Fan Operation Heat Cool 3 16 3 10 3 Cooling Operation Cool Only 3 16 3 10 4 Cooling Operation Heat Cool 3 16 3 10 5 Heating Operation Heat Cool 2 22 22 2 3 16 T 298 TABLE OF CONTENTS Continued 311 CHECK THERMOSTAT OPERATION 3 16 3 11 1 Temperature Display cse ex enl Re DH CGU I Ron ee rs 3 16 3 112 Timeguatd ueste n dde ieu de ur uad Pd ate uA 3 17 3AE Cycle TIME r RE BURG RR Re 3 17 3 11 4 Minimum On Timer Ru RR ek CER Ru RE E E RH 5 3 17 3 11 5 Error MeSSages xl uel 3 17 WIRING SCHEMATICS 4 1 41 INTRODUCTION
32. T K RELAY BLK CONTROL PCB M K3 ASS Y 5 K4 115VAC POWER TL WHT e GRN YEL POWER ASS Y FUSE bii 9 5 250V 3 15A DEE 12VDC POWER 1 2 3 4 5 6 7 8 DISPLAY PCB AS FURNACE SIGNAL Figure 4 9 Heat Pump Ceiling Unit Ducted T 298 4 4 HIGH VOLTAGE POWER SUPPLY LINE CJ FURNACE SIGNAL THERMOSTAT POWER PCB ASS Y ec a gt e zT 2 L cc x ul zx aa aw 2 lt Az oa a Dr nn LL lt zo 2 oto Oru e gt w douse NOTE FIELD WIRING HIGH VOLT FIELD WIRING 12VDC LOW VOLT Figure 4 10 Ceiling Unit Wall Thermostat Ducted amp Free Blow 4 2 WALL MOUNTED THERMOSTATS For proper wiring of Wall Mounted Thermostats as an accessory refer to Figure 3 40 Wall Thermostat Wiring Diagram Cool Only Model or Figure 3 41 Wall Thermostat Wiring Diagram
33. Transport Air Conditioning SERVICE MANUAL for MODEL AirV Rooftop Air Conditioning S ystems T 298 Rev D TRANSICOLD SERVICE MANUAL For AirV AIR CONDITIONING AND HEATING EQUIPMENT MODELS 68RV11302A 68RV14102A 68RV14103A 68RV14112A 68RV15102A 68RV15103A SAFETY SUMMARY GENERAL SAFETY NOTICES The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual They are recommended precautions that must be understood and applied during operation and maintenance ofthe equipment covered herein The general safety notices are presented in the following three sections labeled First Aid Operating Precautions and Maintenance Precautions A listing of the specific warnings and cautions appearing elsewhere in the manual follows the general safety notices FIRST AID An injury no matter how slight should never go unattended Always obtain first aid or medical attention immediately OPERATING PRECAUTIONS Always wear safety glasses Keep hands clear of the evaporator blower and condenser fan No work should be performed on the unit until all circuit breakers and start stop switches are turned off and power supply is disconnected Always work in pairs Never work alone In case of severe vibration or unusual noise stop the unit and investigate MAINTENANCE PRECAUTIONS Beware of unannounced starting of the evaporator blower amp condenser fan Do not remove the ceil
34. apacitor is good e If the ohmmeter goes to 0 or a low resistance and See there the capacitor is shorted and needs to be replaced f If the ohmmeter reads infinity OL the capacitor is open and needs to be replaced 20 000 OHM 2 WATT RESISTOR ATTACH TO CLEAN UNPAINTED METAL PART OF UNIT FRAME SCREWDRIVER TOUCH TO CAPACITOR TERMINALS TO DISCHARGE CAPACITOR Figure 3 25 Set Up For Discharging a Capacitor 3 5 10 Positive Temperature Coefficient Thermister PTC Start Thermistor Troubleshooting a Disconnect power from the AirV unit b Disconnect the wires to the PTC Using an ohm meter check for continuity across the PTC Ifthe PTC does nothave continuity it must be replaced If continuity exists reconnect the wires to the PTC d Reconnect power to the AirV unit e Turn on the AirV unit to start f Use a clamp on amp probe to monitor the amp draw of the compressor during its start up When the compressor starts an amp draw will be indicated for almost a second If no amp draw is indicated or ifthe amp draw occurs for much longer than a second the PTC is defective and must be replaced 3 5 11 Line Voltage 10 Line voltage should be checked during peak electrical load periods With the AirV uniton and the compressor operating use a voltmeter to check the voltage being supplied to the AirV unit The voltage must be within 1096 of the units required voltage A voltage drop greater tha
35. assembly off of the base pan assembly Reverse the above procedure for reassembly ensur ing thatthe air handling system is positioned correct ly Tighten all screws Compressor 24 y x i Condenser Motor Assembly ky Cover Screws n l m Fa 3 M Figure 3 24 Condenser With Motor Assembly amp Compressor 3 5 8 Capacitor Troubleshooting AA WARNING Disconnect power to the AirV unit before checking the capacitor To test capacitor to determine if good open or shorted an ohm meter can be used To determine a capacitor s capacitance a capacitor meter is required Capacitors showing signs of leaks or bulging should be replaced immediately 3 5 9 Capacitor Testing and Replacement Capacitors must be discharged properly before testing a Place a 20 000 ohm 2 watt resistor across the termi nals of the capacitor for approximately 30 seconds See Figure 3 25 for a suggested tool INSULATED SCREWDRIVER CLIP TO AA WARNING Do not touch the metal of the screwdriver when discharging the capacitor You could receive a shock b After the capacitor has been and all wires removed from the capacitor terminals use an ohm meter to test its resistance C Set the scale to R x 1K or 10K ohm and place the ohmmeter leads across the capacitor terminals d Ifthe ohmmeter first reads 0 then rises toward infinity or some higher resistance the c
36. ction 3 6 5 b Perform steps outlined in Sections 3 5 8 amp 3 5 9 c The Low Profile Capacitor is removed from the con Figure 3 36 Evaporator Blower Wheel trol box assembly by pushing on the capacitor from Flush With End Of Motor Shaft under the control box assembly See Figure 3 35 Upper Scroll Assembly Control Box Assembly Figure 3 37 Control Box Assembly With Capacitor 3 6 8 Remote Control Fahrenheit to Celsius EE IT All Remote Control Assemblies in the United States are pre set to display in Fahrenheit degrees see The change from Fahrenheitto Celsius will Figure 3 38 To change from a Fahrenheit display to a be permanent Itcannotbe changed backto Celsius display do the following Fahrenheit 3 13 T 298 a Remove the batteries from the remote control f Carefully cut the FR9 jumper wire Carefully remove the remote cover by inserting a nar g Reverse above procedure for reassembly row flat object between the cover and remote body and prying apart c Remove the brass screw holding the PCB in place A CAUTION d Carefully remove the PCB board from the remote o body making sure the battery springs release from When re assembling ensure the battery their holders springs are correctly placed in the battery e Locate FR9 on the PCB board see Figure 3 39 spring holders Battery Springs BATTERIES amp COVER T 298 3 14 3 7 THERMOSTAT INSTALLATION AND START UP I
37. d Technologies Company York PA 17402 USA Carrier Transicold Division Tel 1 800 673 2431 Carrier Corporation Fax 1 717 764 0401 Transport Air Conditioning Group P O Box 4805 Syracuse 13221 U S A www carrier transicold com A member of the United Technologies Corporation family Stock symbol UTX TRANSICOLD 2006 Carrier Corporation DP rinted U S A 0606
38. eration unit and appear elsewhere in this manual These recommended precautions must be understood and applied during operation and maintenance of the equipment covered herein SPECIFIC WARNINGS AND CAUTIONS AA WARNING Be sure to observe warnings listed in the safety summary in the front of this manual before performing maintenance on the AirV system AA WARNING Before working on the unit be sure to first disconnectall electric power to the unitto avoid the possibility of electrical shock and personal injury Before disconnecting discharge capaci tors by shorting across the capacitors terminals Refer to paragraph 3 5 8 AA WARNING Shield coils with cardboard to protect hands againstinjury from sharp metal edges when re moving compressor and other components AA WARNING Oil vapor in piping stubs can ignite from torch flame and cause serious injury Exercise ex treme care when brazing and keep brazing cloth and fire extinguisher handy for emergency use AA WARNING Disconnect power to the AirV unit before checking the capacitor 4X WARNING Do nottouch the metal of the screwdriver when discharging the capacitor You could receive a shock AA WARNING Before installing thermostat turn off all power to unit There may be more than one power disconnect Electrical shock can cause personal injury or death AA CAUTION Do not use carbon tetrachloride solvents or waxes containing solvents to clean pla
39. ese units are fitted with a 12 VDC microprocessor control system a display panel PCB display and a remote controller These units may be wired to provide thermostatic control of the vehicle furnace Carrier s AirV air conditioning models include cooling only units heating cooling units and heat pump units The cooling only units are available with free blow or ducted air delivery Cooling units with heat strips are available for free blow only Operation ofthe AirV units is controlled automatically by the temperature controller thermostat which maintains the vehicle s interior temperature at the desired set point Free Blow cool only units are available with a wall mounted thermostat Table 1 1 lists model numbers and descriptions of the AirV units and Table 1 2 lists additional support manuals that are available 1 2 SERIAL NUMBER IDENTIFICATION Separate partnumbers and serial numbers are provided for the upper and lower unit assemblies The numbers may be found on a plate readable from inside the vehicle See Figure 1 7 The first two numbers of the serial number see Figure 3 22 is the weekthe unitwas manufactured For example 01 would designate the first week of the year and 52 would designate the last week of the year The third and fourth numbers designate the year in which the unit was manufactured For example 99 would representthe year 1999 00 the year 2000 and 50 on The letter Y and all the numbers after
40. g 2 brown red orange Operation Indicators yellow wires See Figure 3 12 While supporting control box assembly remove two screws securing control box assembly to ducted ceil ing unit Pullcontrol box assembly from the ducted ceiling unit Reverse above procedure to reassemble X T OD 2 Figure 3 9 Filter Removal Ducted Unit 3 4 2 Ceiling Grill Removal To remove the ceiling grill Figure 3 10 do the following a Before working on unit place the master switch in the OFF position and disconnect all electrical power Control Box o Remove filters Refer to paragraph 3 4 1 7 ntrol Remove 4 screws located on the ceiling grill two are LM under the filters making sure to support weight of the grill Lower the ceiling grill from the ceiling panel To replace the grill place the grill up againstthe ceil ing panel and align the screw holes in the grill with the ceiling panel f Replace 4 screws and 2 filters 3 4 3 Control Box Assembly Removal To remove the control box assembly Figure 3 11 amp Figure 3 12 do the following a Remove ceiling grill Refer to paragraph 3 4 2 b Disconnect 115 volt AC and 12 volt DC power wires Figure 3 11 Control Box amp PCB Cover T 298 3 4 Furnace Upper Unit Connectors Wires blue Figure 3 12 Control Box Assembly Ducted 3 4 4 Main PCB Board Removal To remo
41. hands against injury from sharp metal edges when removing compressor and oth er components 3 3 CEILING UNIT FREE BLOW SYSTEMS 3 3 1 Filter Removal The filters Figure 3 1 are located in the ceiling grill To remove the filters do the following a Grasp the edge of the filter at recess in the end of the ceiling grill b Pull filter completely out of the filter slot c Vacuum filter or wash filter in luke warm water S hake off excess water and dry thoroughly d Replace filter by sliding the filter into the filter slot in the ceiling grill until the filter frame is flush with the in terior grill Filters en Figure 3 1 Filter Removal Free Blow 3 3 2 Ceiling Grill Removal To remove the ceiling grill Figure 3 2 do the following a Before working on unit place the master switch in the OFF position and disconnect all electrical power b Remove 4 screws located on the ceiling grill making sure to support the weight of the grill C Lower the ceiling grill from the ceiling panel T 298 d To replace the grill pace the grill up against the ceil ing panel and align t e Replace 4 screws e screw holes in the grill with the s Heat Strip ceiling panel Connection Figure 3 4 Ceiling Panel With Heat Option 3 3 4 Master Control Switch To remove the master control switch do the following a Remove ceiling grill Refer to paragraph 3 3 2 b Remove 5 screws that secure the
42. he thermostat is calibrated within an of plus or minus 2 degrees when shipped from the factory this adjustment will provide the best accuracy when set to o To Select a Enter configuration mode if not already there b Use UP amp DOWN buttons to display oF T 298 c Press MODE button once to display offset value d UseUP amp DOWN buttons to selecta value between 5 and 5 e Press MODE buttonto return to UP amp DOWN buttons now move between option choices or press FAN button to exit configuration mode 3 10 CHECK THERMOSTAT OPERATION 3 10 1 Fan Operation Cool Only 1 Press FAN button starting fan operation FAN an nunciator turns on Lo is displayed in the room tem perature area for 5 seconds indicating Fan Low Speed Press FAN button FAN annunciator remains on Hi is displayed in room temperature area for 5 seconds indicating Fan High Speed Press FAN button stopping fan operation FAN an nunciator turns off 3 10 2 Fan Operation Heat Cool 1 Press FAN button starting low fan Lo operation FAN annunciator turns on Press FAN button starting high fan Hi operation FAN annunciator remains on Press FAN button stopping fan operation FAN an nunciator turns off 3 10 3 Cooling Operation Cool Only 1 Press and release MODE button until COOL is dis played Press DOWN button until LCD readout reads 10 de grees below room temperature Cooling and High Fan
43. igh Capacity Heat Pump R 22 15 9 Ounces Low Profile All R 22 16 9 Ounces 1 4 2 Compressor 115 Volts 60 Cycles 1 Phase a Locked Rotor Amps Standard High Capacity Heat Pump 64 5 AMPS6 b Locked Rotor Amps Low Profile High Capacity 59 0 AMPS c Fully Loaded Amps Standard Cooling Approximate 12 8 AMPS Heating N A d Fully Loaded Amps High Capacity Cooling Approx 14 5 AMPS Heating Approx 11 AMPS e Fully Loaded Amps Low Profile Cooling Approx 14 1 AMPS Heating Approx 13 8 AMPS f Fully Loaded Amps Heat Pump Cooling Approx 12 8 AMPS Heating Approx 11 AMPS 1 4 3 Compressor 220 Volts 50 Cycles 1 Phase a Locked Rotor Amps 23 6 AMPS 1 4 4 Thermostat Range All Free Blow Units 61 F 16 C to 89 F 32 C 1 5 START UP Refer to operating instructions in Owners Guide see Table 1 2 packaged with the vehicle system mms DISCHARGE CAPILLARY TUBE LIQUID nm SUCTION rccumuarn COMPRESSOR EVAPORATOR STRAINER t CONDENSER Figure 1 8 Refrigerant Flow Schematic Standard System 1 6 REFRIGERANT CYCLE STANDARD SYSTEM The cooling cycle is energized when the thermostat located on the ceiling unit calls for cooling The main components of the system are the compressor air cooled condenser coil strainer capillary tube
44. ing grill assembly orthe upperunit cover assembly before turning the power off and disconnecting the power supply Before disconnecting discharge capacitors by shorting across the capacitors terminals See Paragraph 3 5 8 When disassembling wiring use numbered stickers to identify wire leads and terminals This aids in quick accurate reassembly Besure poweris turned off before working on motors controllers or electrical control switches Tag any circuit breakers and power supply to prevent accidental energizing of circuits Do not bypass any electrical safety devices e g bridging an overload or using any sort of jumper wires Problems with the system should be diagnosed and any necessary repairs must be performed by qualified service personnel In case of electrical fire open circuit switch and extinguish with CO never use water Use dry nitrogen to pressurize the system for leak checking Be careful notto exceed 150 psig test pressure in the hermetic compressor Coil fins are sharp Use care when removing the cover form the base pan to avoid personal injury Oil vapor in piping stubs can ignite from torch flame and cause serious injury Exercise extreme care when brazing and keep brazing cloth and fire extinguisher handy for emergency use Disconnect power to the AirV unit before checking the capacitor S afety i T 298 SPECIFIC WARNING AND CAUTION STATEMENTS The statements listed below are applicable to the refrig
45. it designates the unit serial number Example Y 43210 A serial number of 1303Y 12345 designates that the unit was manufactured the 13th week of 2003 and the serial number is Y 12345 1 1 em 68RV14102A TRANSICOLD 99 00468 01 Carrier Q ae u Division of Carrier Corporation CAPACITY 13200 3 955 w TIME DELAY FUSE OR T DESIGN PSIG HIGH 350 LO 150 15s RENE Go os _ CIRCUIT BREAKER COMPRESSOR FAN MOTOR USE CEILING ASSY ANY 99 00469 01 Figure 1 1 Model Serial Number Plate Typical 1 3 DESIGN CHANGE DESCRIPTIONS The following list provides a description of changes in design and serial number breaks for those changes 1400Y A diode was added to the Ducted Ceiling assembly control board to stop DC ripple from the converters 2900Y Cover screw coating was changed in order to eliminate corrosion 3400Y The plastic shroud was modified to improve drainage 5100Y A new compressor and capacitor is introduced improving stability and increasing capacity 1201Y The temperature sensor was moved to the grill to improve temperature sensing during furnace mode 2501Y The dualair sweep was added 4501Y A switch was added to skip compressor malfunction test 4601Y Change in material was made in order to strengthen the fan propeller The mounting bolt lengths were increased 3 4 inch 4901Y The polar white ducted ceiling color was cut in 0703Y amp 1903Y Ne
46. moving the cover form the base pan to avoid per sonal injury To remove the exterior cover do the following a Before working on unit place the master switch in the OFF position and disconnect all electrical power b Remove 15 screws securing the unit cover to the base pan assembly See Figure 3 14 c Carefully liftthe exterior cover off of the unit base pan assembly d Reverse above procedure for reassembly Cover Screws Figure 3 14 Cover Assembly Standard T 298 3 5 2 Compressor Replacement Observe the same procedures for rotary compressors as for reciprocating compressors a Follow all safety codes Reminder use protective goggles work gloves and water soaked quenching cloth Remove exterior cover refer to paragraph 3 5 1 Dis connect all wiring from the compressor Apply field supplied line tap valves to the suction and discharge lines as close to the compressor as possible d Recover the refrigerant charge from the unit After re covering cut the discharge and suction line process tubes below the tube crimps If you choose a good tubing location for cutting the refrigeration lines ini tially the location is easily accessible when making the final joints AX WARNING Oil vapor in piping stubs can ignite from torch flame and cause serious injury xer cise extreme care when brazing and keep brazing cloth and fire extinguisher handy for emergency use o
47. n 1096 will cause a premature compressor failure and needs to be corrected immediately T 298 3 6 SERVICE UPPER UNIT LOW PROFILE 3 6 1 Exterior Cover Removal AA CAUTION Coil fins aresharp Usecare when removing the cover form the base pan to avoid per sonal injury To remove the exterior cover do the following a Before working on unit place the master switch in the OFF position and disconnect all electrical power b Remove 8 screws securing the unit cover to the base pan assembly See Figure 3 26 c Carefully liftthe exterior cover off of the unit base pan assembly d Reverse above procedure for reassembly Figure 3 26 Cover Assembly Low Profile 3 6 2 Upper Scroll Assembly Removal To remove the upper scroll assembly do the following a Remove exterior cover assembly Referto paragraph 3 6 1 b Release the 2 front 2 rear 1 leftside and 1 right side locking tabs See Figure 3 27 by pulling back on the tabs See Figure 3 28 c Remove the screw 1 from the control box cover See Figure 3 27 d With all 6 locking tabs released and control box screw removed lift the upper scroll assembly off of the lower scroll assembly e Reverse above procedure for reassembly Ensure all 6 locking tabs snap shut amp lock T 298 3 10 Figure 3 27 Upper Scroll Assembly Locking Tabs b amp Screw Locations c Figure 3 28 Upper Scroll Assembly Keeper Tab Release Figure
48. or replace as necessary 1 Ceiling grill not properly aligned 1 Align ceiling grill 2 Linkage in upper control box stuck 2 Align and lubricate linkage 3 Air sweep motor failure 3 Replace motor 2 13 WATER LEAKAGE 1 Water dripping from ceiling unit 1 Verify vehicle is level Tighten unit mounting bolts evenly or replace unit gasket T 298 2 2 SYSTEM AND PROBABLE CAUSE PROBABLE REMEDY 2 14 INADEQUATE HEAT FREE BLOW HEAT ONLY 1 No heat from heat strip 1 Verify AMP draw 13 8 AMP Verify resistance through heating element 9 OHM Check bi metal switch If open replace switch 2 15 INADEQUATE HEAT HEAT PUMP NOTE Allow unit to operate 15 minutes after switch ing from cooling mode 1 Reversing valve not operating 1 Check for 115 volts at reversing valve coil Check for reversing valve restriction Verify compressor operation 2 Outdoor coil icing 2 Check outdoor coil sensor Clearing Diagnostic Alarms When a repair has been accomplished due to a corresponding alarm the alarm must be cleared This is done by disconnecting the 12 VDC power to the ducted ceiling assembly for one or two seconds Once the 12 VDC power is reconnected the alarm should have been cleared 2 3 T 298 Table 2 1 System Self diagnostics Function Ducted Remote Error Codes Error Contents Display Pattern Allowed Modes Priority M alfunction 1 ROOM AIR THERM FAN Mode ISTOR FAILURE 3sec INDOOR
49. orator Defrost evaporator coil coil Low refrigerant charge Replace unit Evaporator capillary restricted Replace unit Liquid line restricted Replace unit Compressor hot Verify refrigerant charge Check AMP draw Check A T 8 Weak or inconsistent line power 8 Check line voltage at time of compressor start up 2 7 INSUFFICIENT COOLING COOLING AIR NOT ADEQUATE 1 Dirty evaporator coil 1 Clean as required 2 Iced evaporator coil slightly low refrigerant charge 2 Defrost or Recharge 3 Improper fan operation 3 Verify fan rotation Refer to wiring diagram 4 Defective fan motor 4 Replace fan motor 5 Return air filter is dirty and clean filters Refer to paragraphs 3 3 1 2 8 CONDENSER AIR NOT ADEQUATE 1 Outside Air Restricted 1 Check for obstruction at coil Remedy as required 2 Dirty coil 2 Clean coil 3 Defective fan motor 3 Replace fan motor 1 Unit undersized 1 Re evaluate unit for proper capacity 2 Capillary restricted 2 Check AMP draw Check A T Replace unit 1 Unit overcharged 1 Check AMP draw Check A T Replace unit 2 Low evaporator airflow 2 Clean filter and or evaporator coil 3 Defective electrical connections 3 Check connections per wiring diagram and tighten any loose connections 1 Dirty filter 1 Clean or replace filter 2 Blocked evaporator air inlet indoor 2 Remove blockage 3 Low airflow due to fan motor speed 3 Check fan motor Repair
50. paint Wiring Check all wiring for deterioration and all electrical contacts for tightness or corrosion Mounting Make sure unit is secure on roof according to installation instructions provided in Owner s Guide Check fans to insure Me are correctly positioned in the center of the orifice and tight on the shaft Leaks Check any connections that show evidence of oil or leaks When unit is properly installed refer to Owner s Guide check gaskets for possible air leakage Controls Check unit to ensure all controls are functioning correctly and unit operation is normal Vibrations can cause unwanted noise NOTE Check to ensure that piping is not vibrating against side of the unit NOTE For proper cleaning and flushing use a UL approved refrigerant recovery recycling system NOTE Refrigerant removal must always include recovering the refrigerant notallowing itto escape to the atmosphere 3 2 SERVICE GENERAL General Notes These Service Instructions provided to assist the trained and qualified Carrier service technician in repairing or replacing components of the AirV units AA WARNING Before working on the unit be sure to first disconnect all electric power to the unit to avoid the possibility of electrical shock and personal injury Before disconnecting dis charge capacitors by shorting across the capacitors terminals Refer to paragraph 3 5 8 AA WARNING Shield coils with cardboard to protect
51. pring Clamp Removal i 552 E ee ener elaine Pg ea ARE 3 7 Figure 3 21 Motor Clip 3 7 Figure 3 22 Condenser Fan Removal 2 3 8 Figure 3 23 Blower Wheel surre Rer SE Re he Saar sp PURIS bU EI I ede 3 8 Figure 3 24 Condenser With Motor Assembly amp 3 8 Figure 3 25 Set Up For Discharging a 3 9 LIST OF FIGURES Figure 3 26 Cover Assembly Low Profile 3 10 Figure 3 27 Upper Scroll Assembly Locking Tabs b amp Screw Locations 3 10 Figure 3 28 Upper Scroll Assembly Keeper Tab 3 10 Figure 3 29 Upper Scroll amp Control Box Cover 3 11 Figure 3 30 Condenser Fan Assembly amp Retaining Ring 3 11 Figure 3 31 Condenser Fan Motor amp Fan Assembly Stop 3 11 Figure 3 32 Condenser Fan Motor amp Fan Assembly Tab 3 11 Figure 3 33 Condenser Motor Ground 3 12 Figure 3 34
52. r Ground 3 6 5 Evaporator Motor Blower Assembly Removal To remove the evaporator motor do the following a Perform steps outlined in Section 3 6 2 b Pull back on and release the 4 locking tabs There are 2 on each side of the control box assembly See Figure 3 34 Lift control box assembly from lower scroll assembly exposing evaporator motor Un plug black blue white brown evaporator motor from control box assembly Remove ground wire green yellow from motor housing f Lift motor blower assembly from lower scroll assem bly cradle Carefully remove the blower wheel from the evapora tor motor shaft by pushing out from the motor side D T 298 Lower Scroll Assembly In Cradle Ed Capacitor 7 i NOTE NOTE When reassembling the blower wheel on to When placing the evaporator motor blower the motor shaft ensure that the blower assembly back into the lower scroll assem wheel is flush with the end of the motor bly cradle make sure that the assembly is shaft S eeF igure 3 36 seated securely in the cradle See Figure 3 35 h Reverse above procedure for reassembly 3 6 6 Compressor Replacement Perform the procedures outlined in Section 3 5 2 There are 4 bolts with the Low Profile Compressor The system charge for the Low Profile unitis 16 9 OZ 3 6 7 Capacitor Removal To remove the capacitor do the following a Perform steps a b amp c as outlined in Se
53. refrigerant The transfer of heat from the air to the low temperature liquid refrigerant in the outdoor coil causes the liquid to vaporize This low temperature low pressure vapor passes into the accumulator The accumulator is designed with the inlet tube delivering refrigerant to the bottom of the tank and the outlet tube taking refrigerant form the top ofthe tank This arrangement ensures that only vapor refrigerant is returned to the compressor where the cycle repeats When ventilation only is selected the indoor fan functions to circulate air throughout the vehicle The refrigerant cycle will remain off T 298 SECTION 2 TROUBLESHOOTING For ducted units the green operation indicator LED SeeFigure 3 9 will flash if there is a problem Refer to Table 2 1 for diagnostic information SYMPTOM AND PROBABLE CAUSE PROBABLE REMEDY 2 1 NO POWER TO UNIT Master switch off Open circuit breaker Defective wiring Loose electrical connections Faulty switches thermostat or fan 12 VDC not connected Ducted S ystem 12 VDC in line fuse open Ducted Reset master switch Reset circuit breaker Replace wiring Tighten connections Replace defective components Connectto 12 VDC power source Replace fuse 2 2 DUCTED UNIT WILL NOT OPERATE 1 Display not illuminated 2 Display illuminated 1 Check 12 Volt DC in line fuse 2 Check 115 Volt AC Connections 2 3 DUCTED UNIT WILL NOT COOL 1 Green
54. s on either end of the switch and slide out of lower control box cover Figure 3 3 Ceiling Panel Assembly e Reverse above procedure for reassembly T 298 3 2 3 3 6 Indoor Thermostat Removal To remove the indoor thermostat Figure 3 6 do the following a Remove ceiling grille Refer to paragraph 3 3 2 b Remove 5 screws securing the control assembly item 3 Figure 1 3 to the control box cover c Remove the indoor thermostat knob by grabbing the outside edge of the knob and pulling it off of the ther mostat stem d Remove 2 screws thatsecure the indoorthermostatto the lower control box cover e Carefully disconnectthe 2 wires from the indoorther mostat f Remove the sensing bulb from the plastic clip g Carefully slide the sensing bulb through the rubber grommet h Remove the thermostat from the control assembly i Reverse above procedure for reassembly Thermostat NU Figure 3 6 Indoor Thermostat 3 3 7 Air Sweep Removal To remove the air sweep do the following a Remove ceiling grille Refer to paragraph 3 3 2 b PEINE cam See Figure 3 3 from air sweep motor shaft Remove 4 screws securing air sweep motor bracket to the ceiling panel assembly d Carefully disconnect air sweep motor wire termina tions e Remove 2 screws securing air sweep motor Figure 3 7 to control box and remove motor f Reverse above procedure for reassembly Sensing Bulb 3 3 Figure
55. stic sec tions T 298 Safety ii AA CAUTION Coil fins are sharp Use care when removing the cover form the base pan to avoid personal injury 4 CAUTION Thechange from Fahrenheitto Celsius will be permanent It cannot be changed back to Fahr enheit AA CAUTION When re assembling ensure the battery springs are correctly placed in the battery spring holders AA CAUTION Improper wiring or installation may damage thermostat Wiring must conform to local and national electrical codes S afety iii T 298 TABLE OF CONTENTS PARAGRAPH NUMBER Page DESCRIPTION 225 cules Caan ANE sl LR COUR ACA eR SG 1 1 I INTRODUCTION ant eet obere EE beoe eed aie eU de ee eee es 1 1 12 SERIAL NUMBER IDENTIFICATION 1 1 13 DESIGN CHANGE DESCRIPTIONS 1 1 14 AirV SYSTEM COMPONENT SPECIFICATIONS 1 9 1 41 Retngerant Charge coeurs eec b sek seb t sled en eec da 1 9 14 2 Compressor 115 Volts 60 Cycles 1 Phase 1 9 1 4 3 Compressor 220 Volts 50 Cycles 1 1 9 1 4 4 Thermostat Range All Free Blow 5 1 9 1 5 STARTU Poise eee tee e ecce ese dehy o e ad t et te ce 1 9 16 REFRIGERANT CYCLE STANDARD SYST
56. system should begin to operate within 5 min utes 3 10 4 Cooling Operation Heat Cool 1 Press and release MODE button until COOL is dis played Press DOWN button until LCD readoutreads 10 de grees below room temperature Cooling and High Fan system should begin to operate within 5 min utes 3 10 5 Heating Operation Heat Cool 1 Press and release MODE button until HEAT is dis played Press UP button until LCD readoutreads 10 degrees above room temperature Heating system should begin to operate within 1 minute 3 11 CHECK THERMOSTAT OPERATION 3 11 1 Temperature Display The thermostat will display room temperature until the UP orDOWN button is pressed The word SET appears when these buttons are pressed and the current set point is displayed If no buttons are pressed for 5 seconds the display will change back to show room temperature 3 11 2 Timeguard Timer A 3 minute timeguard is built into the thermostat immediately upon power up and any time the compressor output Y turns off The compressor will not turn on until the timeguard has expired Pressing UP and FAN buttons simultaneously will override the timeguard for 1 cycle 3 11 3 Cycle Timer In normal cooling and heating operation the thermostat will not allow more than 4 equipment cycles per hour or 1 cycle every 15 minutes Both the Y cooling and W heating outputs have a 15 minute timer that starts counting down when the output is
57. t therefore the cooler air is circulated to the interior of the vehicle The transfer of heat from the air to the low temperature liquid refrigerant in the indoor coil causes the liquid to vaporize This low temperature low pressure vapor passes into the accumulator The accumulator is designed with the inlet tube delivering refrigerant to the bottom of the tank and the outlet tube taking refrigerant form the top ofthe tank This arrangement ensures that only vapor refrigerant is returned to the compressor where the cycle repeats When ventilation only is selected the indoor fan functions to circulate air throughout the vehicle The refrigerant cycle will remain off T 298 1 7 REFRIGERANT CYCLE HEAT PUMP mmm DISCHARGE m LIQUID nm SUCTION CAPILLARY INDOOR COIL TUBE J accunutaron COMPRESSOR REVERSING VALVE a STRAINER OUTDOOR COIL Figure 1 9 Refrigerant Flow Schematic Heat Pump Cool Mode 1 7 1 Cooling The cooling cycle is energized when the thermostat located in the ceiling unit calls for cooling The system controls are positioned for normal refrigerant flow with the compressor discharge delivered to the outdoor coil and liquid delivered to the indoor coil See Figure 1 9 The main components of the system are the compressor reversing
58. tor Blower Wheel Adjustment or o Removal Remove exterior cover assembly Refer to Exterior Cover Assembly Removal instructions 3 5 1 Remove control box assembly Refer to Control Box Assembly Removal instructions 3 5 3 Remove upper scroll assembly Refer to Upper Scroll Assembly Removal instructions 3 5 4 Loosen motor assembly Refer to Motor Assembly Removal instructions 3 5 5 Mark shaft at a point where wheel hub and motor shaft meet to aid in reassembly See Figure 3 23 Remove 1 set screw holding the blower wheel to the motor shaft See Figure 3 23 Slide off blower wheel from motor shaft Reverse above procedure for reassembly Figure 3 23 Blower Wheel T 298 o our IF ar i 3 5 7 AirHandling System Removal Remove exterior cover assembly R eferto paragraph 3 5 1 Remove control box assembly Refer to paragraph 3 5 3 Remove upper scroll assembly Refer to paragraph Remove motor assembly Refer to paragraph 3 5 5 Remove 8 screws securing lower scroll assembly to the base pan assembly Remove 1 screw from clamp securing suction tube to the base pan assembly Remove 3 nuts securing the compressor to the base pan assembly Remove 2 screws securing the condenser orifice to the base pan assembly i Remove 2 screws securing the condenser coil as sembly to the base pan assembly j Carefully lift the entire
59. ve indoor coil capillary tube strainer air cooled outdoor coil and the accumulator The compressor raises the pressure and the mpm of the refrigerant and forces it through the discharge line and reversing valve into the indoor coil The indoor blower fan pulls inside air through the filters which remove particulate matter and then pass the cleaned air through the indoor coil The vehicle air which is ata temperature lowerthan the refrigerant passes over the outside of the coil tubes Heat transfer is established from the refrigerant inside the tubes to the vehicle air flowing overthe tubes The tubes have fins designed to improve the transfer of heat from the refrigerant gas to the air this removal of heat causes the refrigerant to liquefy thus liquid refrigerant leaves the coil and flows through the strainer to the outdoor coil The strainer removes any impurities within the refrigerant system The capillary tube meters the flow of liquid refrigerant to the outdoor coil As the refrigerant flows through the capillary tube there is a reduction in pressure and temperature The low pressure low temperature liquid that flows into the outdoor coil tubes is colder than the outdoor air that is circulated overthe tubes Heattransfer is established from the outdoor air flowing over the tubes to the refrigerant flowing inside the tubes The outdoor coil tubes have aluminum fins to increase heattransfer from the air to the
60. ve the Main PCB board Figure 3 13 do the following a Remove ceiling grill Refer to paragraph 3 4 2 b Remove three screws securing the PCB coverto the ducted ceiling unit c Carefully turn over the PCB cover exposing the PCB main and the PCB display assemblies d d push holding clip away from P CB main assem y e Lift PCB main assembly from PCB cover assembly f Unplug display wiring plug 4 Figure 3 13 g Unplug thermistor thermostat wiring plug 3 Figure 3 13 h Unplug power wiring plug 1 Figure 3 12 i Unplug signal wiring plug 2 Figure 3 12 j Reverse above procedures for reassembly Figure 3 13 Main Display PCB s 3 4 5 PCB Display Removal To remove the PCB display assembly Figure 3 13 do the following a Remove ceiling grill Refer to paragraph 3 4 2 b Push large clip away from PCB display assembly c Push center clip towards large clip d Pull PCB display assembly from PCB cover e Unplug display wiring from P CB main assembly f Reverse above procedures of reassembly 3 4 6 Fuse Removal To remove the fuse Figure 3 11 do the following a Remove ceiling grill Refer to paragraph 3 4 2 b ue holder in direction of arrow counter clock wise Pull fuse from fuse holder d Test and or replace e Reverse above procedures for reassembly 3 5 SERVICE UPPER UNIT STANDARD HC amp HP 3 5 1 Exterior Cover Removal AA CAUTION Coil fins aresharp Usecare when re
61. w style PCB Cool Mode Control amp Power Assembly Fans shut off in auto mode 0803Y amp 2603Y New style PCB HeatPump Control amp Power Assembly Fans shut off in auto mode 4204Y Minimum furnace setpointlowered from 63 F to 45 298 Table 1 1 Model Chart Model Number PartNumber Voltage Amps Color 115V Standard System Kb Ivory 220V Standard System White dr Ivory High Capacity esha len 99 00468 04 12 7 Cool Free Blow Hore 10 9 Heat 99 00468 05 12 7 Cool Hee Free Blow 115 1 60 10 9 Heat ystems 99 00468 06 12 7 Cool Ducted UDE 10 9 Heat 99 00468 07 12 7 Cool Ducted Hopes 10 9 Heat LOW PROFILE 99 00468 10 15 1 Cool 68RV15103A Free Blow High Capacity BD 13 8 Heat LOW PROFILE 99 00468 12 15 0 Cool 68RV14103A Free Blow Standard Hone 13 7 Heat CEILING UNIT Model Number Voltage Color Options interface 99 00469 00 115 1 60 Cool Only So 99 00469 01 115 1 60 Cool Only 99 00469 02 115 1 60 Heat Cool DDD 99 00469 03 115 1 60 Heat Cool 68RV0010KA 99 00469 06 115 1 60 12VDC Cool Only 99 00469 04 220 1 50 Cool Only 99 00469 05 220 1 50 Cool Only 68RV0030BA 99 00469 08 220 1 50 Heat Cool 68RV0030KA 99 00469 10 220 1 50 Cool Only 39 00469 11 115 160 SERVOOTCA 99 00469 12 15 1 60 68R VOO1ILA 99 00469 13 115 1 60 12VDC 68RV0010AB 99 00469 23 115 1 60 Cool Only 68RV0010AB 99 00469 24 115 1 60 Cool Only 68RV0010BB 99 00469 25
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