Service Manual
Contents
1. Condenser iagnosis ll Sequence of Operation and Service D JOJOW Ue 0 Jolsltuj8u 1So1J p u LA 1 1e u isou p Ha 1sojj p Buunp p zeidsip 33p uul 150 uunuuixeui lU L p uun JSOUJOP LUNWIUIW Ulul G 9 JOISIWSY q ulqeo u Lo 21 duuo u uA syes JEW yo dwog wWnuwiulW utuu Zz q JOJOW JOSUBPUOI NAUOD 8 21 duioS u uA syeys wuy UO dwog unullulu uluu z e Josseidwoo dwog 0N pu B 1 21 HA p zi5i u p Wadena O z 4 962410 21 Wadeag 1 2 2 IW4Ju0D 2 jwadeag p zi l u INduoS 2 duloo 2 4110 2 Mzuoo 21 dwog 2 HA s nun uo5 IN4deA3 21 dwog dnyeis 1 Sues syes 1 I I dwog uluu Z uo dwog UILU Z IlO11U09 Ul ULqQ 011000 u U 9 dnuels I I i 0 0 4522 ye Kejaq sues Jou Aejap 1 SOJCUILUO julodyjes ynejap Asojoe4 biis Aejdsip anysadwa uw q JW IPA4 1uI 1801 14 9 1 Aoqe ulod s M l q spes Jaw pue 9 8 4o6 4 0 21 406 ol 0 21 4 6 o Kejap W deA3 dutoO y Joye SIULG SUHEM U LO v SI002 ul O O S Aot OF SUUEM2. 3 Disconnect and remove the thermistor in question 4 Immerse the thermistor sensor portion in a glass containing ice and water for 2 to 3 min 5 Check the resistance between the wires at the thermistor connector Normal reading is within 16 0 to 16 7 kO If outside the normal reading replace the thermistor 6 Reconnect and replace the thermistor in its correct position See IV B Component Service Information 7 Plug the appliance back in 14 D Diagnostic Table Check for correct appliance installation per the instruction manual and proper voltage per appliance nameplate 1 Appliance Not Cooling Appliance Not Cooling Possible Cause 1 Power Supply a Unplugged blown fuse or tripped or defective circuit breaker c Not within specifications 2 Power Cord and Plug Loose connection b Defective 3 Wiring b Faulty 4 Control Module a In alarm or shown on display module on models with See IILD Alarm Safeties remote display module b Defective 5 Compressor External Protector Dirty condenser Condenser fan not operating Defective d Start relay defective f Start capacitor if applicable defective 8 Evaporator Fan Defective b Fan blade binding Dirty or frozen up See 2 Evaporator is Frozen Up 10 Refrigerant Refrigerant Lines b Refrigerant lines or components restricted Tr High Pressure Switch fan not operating f Defective
3. 12 Defrost Heater a Control module defective 13 Rail Air Duct Panels a Misaligned b Missing 15 2 Evaporator is Frozen Up 2 Evaporator Fan Motor a Defective 5 Refrigerant Charge Refrigerant 3 Defrost Fails to Initiate or Terminate Defrost Fails to Initiate Possible Cause 1 Defrost Thermistor Confirm a Evaporator temperature 39 F 3 8 C or lower not achieved DTh status See II C See 1 Appliance Not Cooling Thermistor Check 1 Defrost Thermistor Confirm DTh status See II C b Defective Thermistor Check 2 Defrost Heater a Defrost safety thermostat defective b Defective 3 Control Module a Defective 16 II Controls and Adjustments A Control Module When the power cord is plugged in there is a slight delay then the current cabinet temperature is displayed From the control module the cabinet setpoint and temperature display scale can be changed All models are pretested and factory set NOTICE e The control module is fragile handle very carefully e Do not change wiring and connections Never misconnect terminals e Do not short out power supply to test for voltage 1 Control Module Display Icons Control Module Icons Compressor Compressor running Defrost Appliance is in defrost cycle See II B Service Diagnosis for details Evaporator Fan Motor Evaporator fan motor is running Evaporator fan motor de energizes when appliance is in
4. e Do not place anything on top of the rail cover and do not lift the appliance by the rail cover The rail cover is not designed to bear any outside weight e Do not place anything on the air duct panels beneath the pans in the rail The air duct panels are not load bearing I Construction and Refrigeration Circuit Diagram A Construction Rail Cover Start Relay and Start Capacitor 2 IIT Front Panel Left Side Panel lt Control Compressor Module Model Shown CPT46 Model Shown CPT67 Air Duct Panel Air Duct Panels CPT46 Series CPT67 Series CPT93 Series B Refrigeration Circuit Diagram 1 CPT46 D CPT67 D CPT93 D Evaporator Fans 1 2 or 3 depending on model Defrost Safety DD oD e Thermostat Z lt Evaporator Capillary Tube Defrost Heater 1 EE Switch CPT67 D and CPT93 D Condenser Fan 1 5 7 Drier
5. applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel recovered by properly certified service personnel 29 VIII Technical Information A Electrical and Refrigerant Data Design Pressure Refrigerant AC Supply PSIG oz Amperes HIGH LOW 134a 65 6 CPT67 D CPT93 D 115 60 1 290 120 5 See the nameplate for electrical and refrigeration specifications The nameplate is located inside the cabinet We reserve the right to make changes in specifications and design without prior notice 30 B Wiring Diagrams CPT46 D CPT67 D CPT93 D 12 8 umno 0194 01700 no no JON NY K YOUIMS inss id uBiH 173 JLIH 17701 Di pue 22 po Aueyxny J 6 Wein 29142 A MO l K mm r all 1199311411 ee Lele k 3 L R fag boot q 6142 3 3714 1H911 g1 1 1 9 4229142 V n 7 1 33 3119 7 g 19718 19 at 3 102 341 dr PL k yr 7 LON NYA n 4 T LOW NY ln smi ook 3 JEJSOUNSY 1 1501 xx 1 l Ir I 7 LOW NYa In Joo gets E Ka g GE ee GA gl 1 4 66142 2 0 9142 Vin D Her j j m 18044
6. Appliance is in alarm See 11 Alarm Safeties for details 2 Control Module Front Display Layout Control Module Manual Up Defrost Compressor Icon Button Button N al 1 2 SC Defrost Evaporator Fan Alarm Down Button Icon Motor Icon Icon Button Fig 1 Front 17 Control Module Rear Display Layout 7 Defrost Thermistor Cabinet Thermistor 4 Control Module Electrical Layout Cabinet Thermistor Defrost Thermistor BR BU BR BU O o O O O O O O D D A GON TROL MODULE C C CLION CH CF 2 3 4 5 6 C1 Compressor BK F5 Evaporator Fan Motor DBU L2 Power Supply BR N3 Neutral W H4 Defrost Heater R 18 B Temperature The temperature default scale is F but it can be changed to read C To change see 11 Changing the Temperature Display Scale F or C below 1 Default Settings a Temperature Setting 32 F 0 C b Temperature Display Scale F 2 Temperature Setpoint The temperature setpoint is the value for the average cabinet temperature The temperature differential for the compressor to turn on and off is 3 F 1 7 C of the temperature setpoint For example for a temperature
7. a good neutral connection Factory Default Settings a Temperature Setting 32 F 0 C b Temperature Display Scale F For further details see 11 Controls and Adjustments Note There is a minimum 2 min Comp on time and 2 min Comp off time 1 Unplug the appliance from the electrical outlet 2 3 Plug the appliance back into the electrical outlet 4 Confirm 115VAC at CM L2 BR Remove the front panel 5 Startup Cool Down There is a slight delay cabinet temperature appears on display and Comp and EvapFM icons turn on Comp ConFM and EvapFM energize a CM Diagnosis Cabinet temperature appears on display If not check for 115VAC at CM L2 BR to CM N3 neutral W If 115VAC is not present check power cord connections and breaker fuse Confirm wiring connections are secure for both CM L2 BR power supply and CM N3 W neutral If 115VAC is present and display is off replace CM b Comp ConFM Diagnosis Confirm Comp and ConFM energize If not check for 115VAC at CM C1 BK to neutral W If 115VAC is not present at CM C1 BK to neutral W check CTh status II D Thermistor Check If CTh ohm reading is in proper range replace CM If 115VAC is present at CM C1 BK to neutral W check continuity of HPS CPT67 D CPT93 D If open allow time for HPS to reset If HPS does not reset see d HPS Activation below If 115VAC is present and ConFM is energized but Comp is not check for 115VAC from both s
8. and purge the air from the hose See the nameplate for the required refrigerant charge Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets the requirements of ARI Standard 700 latest edition be used 6 A liquid charge is recommended when charging an R 134a system Place the service cylinder on the scales if the service cylinder is not equipped with a dip tube invert the service cylinder then place it on the scales Open the high side valve on the gauge manifold 7 Allow the system to charge with liquid until the proper charge weight is met 8 Close the high side valve on the gauge manifold then close the refrigerant access valve if applicable Disconnect the gauge manifold hose 9 Cap the access valve to prevent a possible leak B Component Service information NOTICE VVhen replacing a component listed belovv see the notes to help ensure proper operation Compressor Install a new start relay and compressor external protector WARNING To reduce the risk of electric shock be sure to reconnect the compressor s ground wire 23 C Door Reversal This appliance is provided with a cabinet design which after being delivered to the installation location permits changing of the door swing from left to right or right to left To change the door swing follow the steps below Example shows change from right hinged to left hinged A WARNING e Wear eye protection when reversing the doors e Keep
9. appliance A WARNING The appliance should be destined only to the use for which it has been expressly conceived Any other use should be considered improper and therefore dangerous The manufacturer cannot be held responsible for injury or damage resulting from improper incorrect and unreasonable use Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage To reduce the risk of death electric shock serious injury or fire follow basic precautions including the following e Only qualified service technicians should install and service the appliance e The appliance must be installed in accordance with applicable national state and local codes and regulations Failure to meet these code requirements could result in death electric shock serious injury fire or damage to the appliance e Appliance is heavy Use care when lifting or positioning Work in pairs when needed to prevent injury or damage Do not lift using the refrigeration area the top section or the doors drawers e To reduce the risk of electric shock do not touch the plug with damp hands e Unplug the appliance before servicing e The appliance requires an independent power supply of proper capacity See the nameplate for electrical specifications Failure to use an independent power supply of proper capacity can result in a tripped breaker blown fuse damage to
10. delay timer start Defrost icon and dEF display continue 2 1 min Comp EvapFM delay timer terminates Defrost icon turns off Comp icon turns on Comp and ConFM energize If DTh is at 36 F 2 C or lower EvapFM icon tuns on and EvapFM energizes dEF display continues 6 hr defrost interval timer resets Note If DTh is 37 F 3 C or higher when 1 min Comp EvapFM delay timer terminates EvapFM remains off until evaporator temperature is 36 F 2 C or lower 3 11 min temperature display delay timer terminates Cabinet temperature replaces dEF Defrost Diagnosis 1 Time Initiation Has 6 hr defrost timer terminated Before proceeding confirm DTh status See II C Thermistor Check Manual Initiation Press and release the defrost button Check the following 1 CM Diagnosis Confirm defrost icon turns on Comp and EvapFM icons turn off and dEF replaces cabinet temperature on display If not replace CM 2 DH Diagnosis Confirm DH energizes If not check for 115VAC at CM H4 R to neutral W If T15VAC is not present replace CM If 115VAC is present check DST continuity If open let cool and reset If DST does not close replace DST If DST is closed check DH amp draw and continuity 3 Comp ConFM Diagnosis Confirm Comp and ConFM de energize If not check for 115VAC at CM C1 BK to neutral W If 115VAC is present replace CM 4 EvapFM Diagnosis Confirm EvapFM de energizes If not check for 115VA
11. existing wiring or component failure This could lead to heat generation or fire e THE APPLIANCE MUST BE GROUNDED The appliance is equipped with a NEMA 5 15 three prong grounding plug to reduce the risk of potential shock hazards It must be plugged into a properly grounded independent 3 prong wall outlet If the outlet is a 2 prong outlet it is your personal responsibility to have a qualified electrician replace it with a properly grounded independent 3 prong wall outlet Do not remove the ground prong from the plug and do not use an adapter plug Failure to follow these instructions may result in death electric shock or fire e The GREEN ground wire in the factory installed power cord is connected to the appliance If it becomes necessary to remove or replace the power cord be sure to connect the power cord s ground wire e Do not use an extension cord Ai WARNING continued e Do not use an appliance with a damaged power cord The power cord should not be altered jerked bundled weighed down pinched or tangled Such actions could result in electric shock or fire To unplug the appliance be sure to pull the plug not the cord and do not jerk the cord e Do not splash pour or spray water directly onto or into the appliance This might cause short circuit electric shock corrosion or failure e Do not make any alterations to the appliance Alterations could result in electric shock injury fire or damage to the appli
12. fingers away from edge of upper hinge bracket Spring cartridge can cause the upper hinge bracket to move suddenly with extreme force 1 Make sure the appliance is unplugged from the electrical outlet and the casters are locked 2 Open the door to the fully open position then remove the inner screw from the upper hinge bracket See Fig 3 3 Close the door WARNING Keep away from upper hinge bracket Upper hinge bracket kicks out when door is closed See Fig 4 Remove the outer screw from the upper hinge bracket WARNING Upper hinge bracket kicks out when door is closed Inner Screw Upper Hinge Bracket Outer Screw Upper Hinge Bracket Door Fully Open Fig 3 Fig 4 Door Closed 4 While maintaining a hold on the door remove the lower hinge bracket See Fig 5 Leave the thrust washer in place 5 Pull out the bottom of the door slightly and gently remove the door from the appliance 6 Remove the upper hinge bracket from the spring cartridge See Fig 6 Thrust Washer r Screw Washer Lower Hinge Bracket 1 Upper Hinge Bracket Bolts Door 24 7 Remove the filler cap filler screws and spring cartridge See Fig 7 Leave the thrust washers in place on the spring cartridge NOTICE Spring cartridge may be difficult to remove Be careful not to damage the finish Screws Filler Cap Filler Screws Thrust Washers Fig 7 Spring
13. setpoint of 32 F 0 C the compressor comes on at 35 F 2 C and the compressor goes off at 29 F 2 C If necessary adjust the temperature setpoint as follows 1 Press and hold the up button briefly then release The current temperature setpoint appears 2 Press the up or down button until the desired value is displayed After a few sec the display returns to the current cabinet temperature and the temperature setpoint is saved e The temperature setpoint is adjustable between 28 F and 45 F 2 C and 7 C The factory default is 32 F 0 C NOTICE Do not adjust the temperature setpoint more than 2 F 1 C at a time Allow the temperature to stabilize for a minimum of 8 hrs before making further temperature setpoint adjustments 3 Changing the Temperature Display Scale F or C To change the temperature display scale follow the steps below 1 Press and hold both the up and down buttons for 5 sec PAS appears briefly in the display then 000 appears 2 Press the up button to change the display to 001 3 Press the SC button EHE appears in the display Press the up or down button until diS is displayed 4 Press the SC button CFu appears in the display Press the SC button again The current temperature display scale setting appears 5 Press the up or down button to change the temperature display scale 6 Press the SC button to save the setting Wait 1 min or press the manual defrost bu
14. 0 sec then silent for 50 sec To silence the alarm and clear Lo from the display press and release the up button The alarm icon stays on Automatically resets when temperature returns to Cabinet temperature has remained below 20 F 6 5 C for more than 2 hr normal High Voltage Alarm 185VAC 5 or The compressor de energizes if voltage protection more operates The voltage safeties automatically reset Lo Low Voltage Alarm 96VAC 5 or less E Safety Devices 1 Compressor External or Internal Protector All Models If combined temperature amperage value is above the limit specified by the compressor manufacturer the compressor protector operates independently to turn off the compressor The compressor protector de energizes the compressor until the temperature amperage value returns to an acceptable level 2 High Pressure Switch CPT67 D and CPT93 D If pressure on the high side of the appliance exceeds Hoshizaki specifications the high pressure switch activates and interrupts the compressor circuit de energizing the compressor until the pressure returns to an acceptable level If both the compressor and condenser fan motor are off it is most likely the appliance is off or the high pressure switch has opened See VIII B Wiring Diagrams 20 IV Refrigeration Circuit and Component Service Information A WARNING e This appliance should be diagnosed and repaired only by qualified service personn
15. 10 n n 31
16. C at CM F5 DBU to neutral W If 115VAC is present replace CM 2 Defrost Termination There is a 5 min minimum defrost time and a 1 hr maximum defrost time Has 5 min minimum defrost timer terminated Confirm DTh status See II C Thermistor Check 1 CM DTh and DH Diagnosis If 5 min minimum defrost timer has terminated has DTh warmed to 41 F 5 C If DTh has not warmed to 41 F 5 C check DST and DH continuity Next check DH amp draw If DTh is in proper range DH de energizes If not replace CM Once DH de energizes 1 min Comp EvapFM delay timer and 11 min temperature display delay timer start Defrost icon and dEF display continue If not replace CM If 41 F 5 C is not achieved within 1 hr CM terminates defrost 2 Comp ConFM Diagnosis 1 min Comp EvapFM delay timer terminates Comp icon turns on and Comp and ConFM energize If not confirm CTh is warm enough for Comp and ConFM operation Next check for 115VAC at CM C1 Bk to neutral W If 115VAC is not present check CTh status II D Thermistor Check If CTh ohm reading is in proper range and Comp and ConFM do not energize replace CM If 115VAC is present at CM C1 BK and Comp or ConFM are not energized check Comp start components Comp external protector and Comp motor winding continuity On CPT67 D and CPT93 D check that HPS is closed See II B 5 d HPS Activation CPT67 D and CPT93 D If ConFM is not energized check ConFM fan blade
17. Cartridge Door 8 Clear material from the spring cartridge hole to allow for spring cartridge installation Reinstall the filler cap filler screws and spring cartridge on the opposite side of the door See Fig 8 177 Screws Spring Cartridge Fig 8 Spring Cartridge Hole Filler Screws Filler Cap Door 25 9 Make sure the thrust washers are in place on the spring cartridge then install the upper hinge bracket onto the spring cartridge See Fig 9 The upper hinge bracket should be canted out towards the center as shown with the screw holes towards the back of the appliance 10 Remove the filler cap and nylon bearing from the bottom of the door See Fig 10 Reinstall on the opposite side Screw Washer wo L Screw Holes N mi Upper Hinge Bracket Thrust VVashers rar Filler Cap Fig 9 Fig 10 Nylon Bearing 11 Move the door into position and maintain a hold on the door Make sure the thrust washer is in place then install the lower hinge bracket Do not tighten the bolts yet Start each bolt for a few threads only and leave loose See Fig 11 12 Install the outer screw into the upper hinge bracket Do not tighten the screw yet Start the screw for a few threads only and leave loose See Fig 12 Note The door being reversed must be in the closed position However the adjoining door may be opened for ease of access Outer Screw Upper Hinge Bracket Lower Hi
18. Do not use too much force otherwise the fins could be damaged WARNING Condenser fins are sharp Use care when cleaning 5 Replace the front panel in its correct position Ensure that the screw is securely in place 6 Plug the appliance back in Front Panel Fig 14 Screw Condenser 2 Power Supply Connection f a plug or power cord is damaged replace it Be sure to connect the ground wire 27 VI Preparing the Appliance for Periods of Non Use When shutting down the appliance for more than one week follow the instructions below A WARNING When preparing the appliance for long storage prevent the doors drawers from closing to reduce the risk of children getting trapped NOTICE When preparing the appliance for long storage clean the appliance See the instruction manual for cleaning details Before shutting down the appliance move all foods into another clean refrigerator or freezer 2 Unplug the appliance WARNING To reduce the risk of electric shock do not touch the plug with damp hands 28 VII Disposal When disposing of the appliance follow the instructions below A WARNING When preparing the appliance for disposal remove the doors drawers to reduce the risk of children getting trapped Leave the shelves in place so that children may not easily climb inside The appliance contains refrigerant and must be disposed of in accordance with
19. Hoshizaki America Inc Commercial Series Refrigerated Kitchen Equipment Models Refrigerated Prep Table with Raised Rail SERVICE MANUAL A Superior Degree of Reliability vvvvvv hoshizaki com Number 73201 ssued 4 24 2014 A WARNING Only qualified service technicians should install and service the appliance To obtain the name and phone number of your local Hoshizaki Certified Service Representative visit www hoshizaki com No service should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage Proper installation is the responsibility of the installer Product failure or property damage due to improper installation is not covered under warranty Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the appliance Should the reader have any questions or concerns which have not been satisfactorily addressed please call send an e mail message or write to the Hoshizaki Technical Support Department for assistance Phone 1 800 233 1940 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department Web Site www hoshizaki com NOTE
20. To expedite assistance all correspondence communication MUST include the following information e Model Number e Serial Number e Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully before the appliance is serviced Read the warnings and guidelines contained in this booklet carefully as they provide essential information for the continued safe use service and maintenance of the appliance Retain this booklet for any further reference that may be necessary CONTENTS Important Safety Informatio _ Raya aaa ry maraq 4 I Construction and Refrigeration Circuit Diagram 7 a 7 B Refrigeration Circuit Diadfam aa aaa daaa qama 8 II Sequence of Operation and Service 1 0555 9 A Sequence of Operation Flow Chartl 9 B Service DIAN OSS a aa R aa d 10 C Thermistor HEC casero a a aaa ada aaa Besa b onqon 14 D Diagnostic m aq 15 Ill Comntr lsand Adj stments uu RA yad 17 A Control Mod le ada b bas l 17 B Temperal l8 uuu uu uuu mu ma akad arama 19 191 1 19 2 Temperat re 19 3 Changing the Temperature D
21. ULC j 000075 gt sss ur gt gt 1So1J dq gl uonenuul JSOISQ l p A IU9V umoq 009 zl uMoq IooO dnue1s L Heya No d sduenbas 142 A Sequence of Operation Flovv Chart B Service Diagnosis A WARNING e The appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire e Risk of electric shock Use extreme caution and exercise safe electrical practices e Moving parts e g fan blade can crush and cut Keep hands clear e Make sure all food zones are clean after the appliance is serviced NOTICE e The appliance is not intended for outdoor use Normal operating ambient temperature must be within 45 F to 86 F 7 C to 30 C e The appliance must not be located next to ovens grills or other high heat producing equipment e The appliance must not be located in a corrosive environment e The appliance must be a minimum of 1 3 cm from side walls e A minimum of 10 25 cm clearance above the rail must be provided to allow the rail cover to open The diagnostic procedure is a sequence check that allovvs you to diagnose the electrical system and components Before proceeding check for correct installation and proper voltage per nameplate If the display is in alarm see 11 Alarm Safeties Note VVhen checking voltage 115VAC alvvays choose a vvhite VV neutral vvire to establish
22. ance e The appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety e Children should be properly supervised around the appliance e Do not climb stand or hang on the appliance or doors drawers or allow children or animals to do so Do not climb into the appliance or allow children or animals to do so Death or serious injury could occur or the appliance could be damaged e Be careful not to pinch fingers when opening and closing the doors drawers or rail cover Be careful when opening and closing the doors dravvers or rail cover when children are in the area e Open and close the doors dravvers and rail cover with care Opening the doors drawers or rail cover too quickly or forcefully may cause injury or damage to the appliance or surrounding equipment Do not use combustible spray or place volatile or flammable substances in or near the appliance They might catch fire e Keep the area around the appliance clean Dirt dust or insects in the appliance could cause harm to individuals or damage to the equipment Do not throvv anything onto the shelves or load any single shelf vvith more than 120 Ib 54 5 kg of product They might fall off and cause iniury e Do not load any single drawer with more t
23. el to reduce the risk of death electric shock serious injury or fire e To reduce the risk of electric shock do not touch the plug with damp hands e Unplug the appliance from the electrical outlet before servicing e Make sure all food zones in the appliance are clean after the appliance is serviced For cleaning procedures see the instruction manual A Refrigeration Circuit Service Information A WARNING e Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA certified service personnel e Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 134a as a mixture vvith pressurized air for leak testing NOTICE Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere e Do not leave the system open for longer than 15 min when replacing or servicing parts The Polyol Ester POE oils used in R 134a appliances can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing parts e Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made Install the new drier with the arrow on t
24. han 150 Ib 68 kg of product Depending on the vveight of product in the dravvers secure the unit as necessary to prevent it from overturning Do not open more than one dravver at a time e The appliance is designed only for temporary storage of food Employ sanitary methods Use for any other purposes for example storage of chemicals or medical supplies such as vaccine and serum could cause deterioration of stored items e Do not block air inlets or outlets otherwise cooling performance may be reduced Do not tightly pack the cabinet Allow some space between items to ensure good air flow Also allow space between items and interior surfaces e Do not put warm or hot foods in the cabinet Let them cool first or they will raise the cabinet temperature and could deteriorate other foods in the cabinet or overload the appliance A WARNING continued All foods in the cabinet should be wrapped in plastic film or stored in sealed containers Otherwise foods may dry up pass their smells onto other foods cause frost to develop result in poor appliance performance or increase the likelihood of cross contamination Certain dressings and food ingredients if not stored in sealed containers may accelerate corrosion of the evaporator resulting in failure e Do not store items near air outlets Otherwise items may freeze up and crack or break causing a risk of injury or contamination of other food e The entire rail must always be c
25. he drier in the direction of the refrigerant flow e When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 1 Refrigerant Recovery No refrigerant access valves are provided on this appliance Using proper refrigerant practices utilize a temporary tap line valve on the high side to recover the refrigerant Store the refrigerant in an approved container Do not discharge the refrigerant into the atmosphere After recovery is complete replace the tap line valve with a proper permanent access valve 21 2 Brazing A WARNING e R 134a itself is not flammable at atmospheric pressure and temperatures up to 212 F 100 C e R 134a itself is not explosive or poisonous However when exposed to high temperatures open flames R 134a can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous Do not use silver alloy or copper alloy containing arsenic e Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 134a as a mixture with pressurized air for leak testing 1 Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG NOTICE e Always install a new drier every time the sealed refrigeration system i
26. ides of Comp external protector to neutral W If 115VAC is present on one side and not the other allow time for Comp external protector to cool and reset If Comp external protector does not reset replace Comp external protector If 115VAC is present on both Comp external protector wires check Comp start capacitor start relay and Comp motor windings If ConFM is not energized check ConFM fan blades for binding and motor winding continuity If Comp and ConFM are energized and the cabinet does not cool down check for a restriction in the refrigeration circuit and correct refrigerant charge c EvapFM Diagnosis Confirm EvapFM energizes If not check for 115VAC at CM F5 DBU to neutral W If 115VAC is not present replace CM If 115VAC is present check EvapFM blades for binding and EvapFM continuity d HPS Activation CPT67 D and CPT93 D Confirm ConFM is energized and fan blade turns freely Confirm condenser coil is not clogged or restricted Confirm there are no restrictions in the refrigeration circuit drier Let refrigeration circuit pressures equalize If HPS does not reset and pressures are equalized replace HPS If pressures are not equalized reclaim refrigerant and diagnose refrigeration circuit restriction 6 Cool Down Achieved CTh cools to 3 F 1 7 C below setpoint EvapFM continues Comp and ConFM de energize Diagnosis Confirm Comp and ConFM de energize If not and Comp and ConFM were energized longer than 2 m
27. in check CTh status See II C Thermistor Check If CTh ohm reading is in range and Comp and ConFM were energized longer than 2 min check for 115VAC at CM C1 BK to neutral W If 115VAC is present replace CM 11 7 Defrost 6 hr defrost timer terminates and DTh is at or lower than 39 F 3 8 C defrost starts If on Comp and EvapFM icons turn off Comp ConFM and EvapFM de energize The defrost icon turns on and dEF is displayed DH energizes There is a 5 min minimum defrost time 1 hr maximum defrost time 6 hr minimum defrost interval and 8 hr maximum defrost interval 1a Time Initiation 6 hr defrost interval timer terminates Control module checks DTh If DTh is at or lower than 39 F 3 8 C defrost starts If on Comp and EvapFM icons turn off Comp ConFM and EvapFM de energize Defrost icon turns on and dEF is displayed DH energizes If DTh is greater than 39 F 3 8 C defrost is delayed for 2 hrs 8 hr defrost interval timer Once the 8 hr defrost interval timer terminates defrost starts regardless of evaporator temperature 1b Manual Initiation To initiate a manual defrost press and release the manual defrost button on display If on Comp and EvapFM icons turn off Comp ConFM and EvapFM de energize Defrost icon turns on and dEF is displayed DH energizes 2 Defrost Termination 1 DTh warms to 41 F 5 C DH de energizes 1 min Comp EvapFM delay timer and 11 min temperature display
28. isplay Scale F or C 19 C Manual sir et u u au aaa daa b Bo qad 19 D Alarm u Ee ki ab ada 20 E Safely DE a tI sl 20 IV Refrigeration Circuit and Component Service Information 21 A Refrigeration Circuit Service Information u 21 1 Refrigerant Recovery da kara s d r 21 2 zl si 22 3 Evacuation and Recharge F 134a 22 B Component Service Information asasan 23 C Door R versal u u uuu ad 24 M Mlalnienane aa au 27 VI Preparing the Appliance for Periods of Non Use 28 M LLU SUDA aaa asa adadak aaa 29 Vi Technical Informati n d si 30 A Electrical ana Refrigerant DATA ara aaa 30 B Uu is ban 31 Important Safety Information Throughout this manual notices appear to bring your attention to situations which could result in death serious injury damage to the appliance or damage to property A WARNING Indicates a hazardous situation which could result in death or serious injury NOTICE Indicates a situation which could result in damage to the appliance or property IMPORTANT Indicates important information about the use and care of the
29. nge Bracket Door Closed Bolts Fig 11 Fig 12 13 Open the door to the fully open position 14 Rotate the upper hinge bracket inward into position using channel locks See Fig 13 NOTICE Be careful not to damage the finish Install the inner screw into the upper hinge bracket 15 Tighten all fasteners Rotate Inward wee Rotate upper hinge bracket using channel locks V Maintenance A WARNING e Unplug the appliance before performing maintenance to prevent electric shock or injury by moving parts To reduce the risk of electric shock do not touch the plug with damp hands e Before performing maintenance move all foods into another clean refrigerator or freezer 1 Condenser Check the condenser once a year and clean if required by following the steps below More frequent cleaning may be required depending on location 1 Unplug the appliance from the electrical outlet VVARNINGI To reduce the risk of electric shock do not touch the plug with damp hands 2 Remove the screw securing the front panel then pull the front panel out slightly to remove it See Fig 14 NOTICE Be careful not to pull out the front panel too far because there are power wires and thermistor wires attached to the control module in the front panel 3 Without pulling on the wires set the panel to the side 4 Use a brush attachment on a vacuum cleaner to gently clean the condenser fins
30. overed by rail dividers and pans Otherwise the appliance will not cool properly Use only pans up to 6 15 cm deep Do not use damaged rail dividers or pans e Ingredients must be pre chilled to 37 F 3 C or less before placing in rail e Keep the rail cover closed when not actively preparing food e The rail is for keeping ingredients cool while preparing food If not actively preparing food for a long period such as overnight seal pans with plastic wrap in addition to closing the rail cover Depending on conditions the cabinet temperature setting may need to be adjusted to prevent items from freezing Alternatively seal ingredients and store them in a refrigerator or freezer e Protect the floor when moving the appliance to prevent damage to the floor e Keep ventilation openings in the appliance enclosure or in the built in structure clear of obstruction The factory installed rear bumpers must be in place to ensure proper rear clearance Blockage of airflow could negatively affect performance and damage the appliance e Do not allow the appliance to bear any outside weight To prevent deformation or cracks do not spray insecticide onto the plastic parts or let them come into contact with oil e To avoid damage to the gasket use only the door drawer handle when opening and closing e Do not leave the doors drawers open e To avoid damage to the top seal do not lift the appliance by the top section or remove the top section
31. s for binding and motor winding continuity 3 EvapFM Diagnosis 1 min Comp EvapFM delay timer terminates If DTh is at 36 F 2 C or lower EvapFM icon turns on and EvapFM energizes If not confirm that DTh is at 36 F 2 C or lower If not confirm Comp is on and cooling See II B 5 b Comp ConFM Diagnosis and II C Thermistor Check Once 36 F 2 C or lower is achieved check for 115VAC at CM F5 DBU to neutral W If 115VAC is not present replace CM If 115VAC is present and EvapFM is not energized check EvapFM blades for binding and EvapFM continuity 4 11 min temperature display delay timer terminates dEF is replaced by cabinet temperature on display If not replace CM Legend CM control module Comp compressor ConFM condenser fan motor CTh cabinet thermistor DH defrost heater DST defrost safety thermostat DTh defrost thermistor EvapFM evaporator fan motors HPS high pressure switch C Thermistor Check The cabinet thermistor is used for cabinet temperature control and the defrost thermistor is used for defrost cycle initiation 39 F 3 8 C defrost termination 41 F 5 C and EvapFM initiation after defrost 36 F 2 C or lower Thermistor resistance varies depending on temperature The control module monitors the thermistors to control system operation No adjustment is required To check thermistor resistance follow the steps below 1 Unplug the appliance 2 Remove the front panel
32. s opened Do not replace the drier until after all other repair or replacement has been made Install the new drier with the arrow on the drier in the direction of the refrigerant flow e When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 2 Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 134a as a mixture with pressurized air for leak testing 3 Evacuation and Recharge R 134a 1 Attach a vacuum pump to the system Be sure the high side charging hose is connected to the field installed high side access valve IMPORTANT The vacuum level and vacuum pump may be the same as those for current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump then open the high side valve on the gauge manifold Never allow the oil in the vacuum pump to flow backwards 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the high side valve on the gauge manifold 22 5 Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder Remember to loosen the connection
33. tton twice to return to the temperature display C Manual Defrost To initiate a manual defrost press and release the manual defrost button The defrost icon and dEF appear in the display D Alarm Safeties Alarm signals are designed to protect the appliance and food product These alarms give information or vvarnings in the event the appliance is operating out of acceptable parameters Should one of the alarms occur follovv the instructions in the table belovv to address the alarm The alarm code flashes once every second vvith audible alarm To silence the alarm press and release the upper button Alarm Signals Alarm Code Corrective Action Reset Details Cabinet Thermistor Malfunction Alarm Beeps for 10 sec then silent for 50 sec To silence the alarm press and release the up button Cabinet thermistor has failed Appliance cycles 5 min on 5 min off Defrost Thermistor Malfunction Alarm Beeps for 10 sec then silent for 50 sec To silence the alarm press and release the up button Defrost thermistor has failed Appliance eycles on and off vvith cabinet thermistor High Temperature Alarm Beeps for 10 sec then silent for 50 sec To silence the alarm and clear Hi from the display press and release the up button The alarm icon stays on Cabinet temperature has remained above Automatically resets when temperature returns to 57 F 13 9 C for more than 2 hr normal Lovv Temperature Alarm Beeps for 1
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