Hoshizaki AMERICA 73183 User's Manual
Contents
1. 4nou L SI USYM syes Jau ejdsip 1 panu 1s04Jep SI eunye1eduue 5 USYM 5 5 Jeu SI sugs Jeuun seziBieue ep duo duo ejnuru z 9 seziB1eue duo ueuM SMEIS JEU uo duo UO peuedo si 100p Jaddn ueuw pue uo peuedo si 100p USYM 71 SJON peziBieue ep dwoy peziBieue ep pezibieue peziBieue Hd 7 Hd peziBieue peziBieue syes I yo dwog uW g Jejeay uoi nuJ HIN 10je10der9 N4deng S0149p 4 LA Jayeay 194 jeuiqeo u Lo JOJOW Jesuepuoo N UOS JosseJduuoo duio5 puaba Hd2. 20 1 Compressor External or Internal 20 2 Short Cycle Protectii b tte 20 3 High Press re SM M dE 20 Mullion Perimeter Heater 22 20 EG 20 lll Technical c 21 A Circuit 21 B Wiring Diagrams RR RE 22 N Service DENS Saa 27 FT Le 27 28 2 PE 30 B Control dC 33 C Thermistor Chek 34 D DANE Chatt use eske 35 1 Unit O2 Q 35 2 Evaporator IS Frozen Et 36 Defrost X NIRE 36 V Replacement Of CONTDOPOP S ursus cuu pui atas GaU DR RENE LESE 37 A Service for Refrigerant LINE opone ipta ratore iaar 37 1 R figerant UT 37 TTE 38 EVa c ation and Recharge PUN NND 38 B Important Notes for Component 40 C Door Re HINGING A 4
3. s EET QS IN Door Lock s 4 Power Cords Control J IS Power Door Lock AA 2 Switch Reservoir Condensate Display arte Pump Module CR3B FS HS 4 Display Module CF3B FS HS Door Gasket Door Evaporator uk Cabinet Thermistor e Defrost Thermistor e Evaporator Fan Shroud Model Shown CR3B FS CR3B FS HS and CF3B FS HS 11 Sequence of Operation 1 Sequence Cycles and Shutdown The steps in the sequence are as outlined below Note 1 There is a slight delay at startup 2 When power is turned on the 2 hour high temperature alarm timer is bypassed Therefore high temperature alarm can occur at startup To silence the alarm press and release the upper button Alarm clears once temperature is within factory parameters For details see Il D 2 Alarm Safeties 3 There is 2 minute minimum Comp on time and 2 minute minimum Comp off time 4 EvapFM de energizes when door is opened on FS and when upper door is opened on HS 5 float switch controlled condensate pump located on top of the unit is used to pump evaporator condensation to the condensate pan 6 On freezers EvapFM is de energized during defrost a Refrigerator 1
4. 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 If necessary add any remaining charge to the system through the low side CAUTION To prevent compressor damage use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low side access valve with the unit running 9 Close gauge manifold valves and disconnect the hoses 10 Cap the access valves to prevent a possible leak 39 B Important Notes for Component Replacement CAUTION When replacing component listed below see the notes to help ensure proper operation Component Compressor Install new start relay start capacitor and compressor overload compressor overload is integrated with the start relay on refrigerators internal on 1 section freezers external on 2 section freezers Compressor WARNING To reduce the risk of electric shock be sure to reconnect the Evaporator component s ground wire Fan Motor Condenser Fan Motor Expansion Valve Attach the expansion valve bulb to the suction line in the same location as the previous bulb Secure the bulb with the clamp and holder then insulate it Defrost After working with or around the defrost thermistor on a freezer make sure the defrost Thermistor thermistor wire is not touching the defrost heater Co
5. 9 GR GREEN MULL ION HEATER GRAY 1 2 DOOR ONLY B T BK 0 0 LBU LIGH BLUE Ba SJEF PINK R RED V VIOLET W WHITE Y YELLOW 3 5 5 5 5 115 60 1 GND i N dr DISPLAY BK MODULE PERIMETER HEATER 8 2 POWER E ES SWITCH GY gt BK MULL ION HEATER 1 2 DOOR ONLY BK 0 0 w 4 NE BK BR NDENSAT w DISPLAY T i PUMP CABLE DEFROST CABINET THERM THERM GND GR BR GR Lo BR BR FLOAT SWITCH BU BU BK N A PM RE LBU DOOR SWITCH LBU CONTROL DOOR OPEN MODULE BK w 8 n 1 2 3 4 5 6 nes 9 DBU DBU S 5 EVAPORATOR GE 1 DOOR SWITCH RELAY GND BK EVAPORATOR GR w BK BK i BK GND LGR BK BK AAA BK 4 DEFROST HEATER THERMOSTAT w T START CAP
6. 2 2 5 5 5 5 115 60 1 3 y GND r DISPLAY BK MODULE E POWER v SWITCH ove ore m 4 BK BK BR CONDENSATE w 4 PUMP GND GR DISPLAY Lo CABLE DEFROST CABINET THERM THERM FLOAT SWITCH BR GR BR BR BK LBU id BU BU Ex ole olo DOOR SWITCH DOOR SWITCH am am DOOR OPEN DOOR OPEN N N w 8 n 7 CONTROL T T MODULE T DB CABINE LIGHT C L L HNF v 1 2 3 4 5 6 EVAPORATOR 5 1 1 FAN DOOR T Re MEN CAB INE B BK GND EVAPORATOR BK FAN 4 BK Fen GND 2 EVAPORATOR FAN LOR BK Fen 4 GND LGR B GY 5 6 w w p START CAP HIGH PRESSURE COMPRESSOR 280 MFD COMPRESSOR AT eov OVERLOAD 4 R SN 1 214 COMPRESSOR RELAY MULL ION HEATER BR BK BK WIRE COLOR CODE CONDENSER GND PEST BK BLACK FAN GR MULLION HEATER e 1 2 DOOR ONLY BR BROWN gt BU 0 0 BU BLUE GND DBU DARK BLUE Ler
7. Note Only the top receptacles have power 6 CF3B FS HS Receptacle Box Connection WIRE COLOR CODE 208 230 60 1 i BK BLACK e HE LI L2 N W WHITE AS W 115 60 LI 6ND L2 GND N TO SYSTEM TO SYSTEM N Note Only the top receptacles have power 26 IV Service Diagnosis WARNING 1 This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire 2 Risk of electric shock Use extreme caution and exercise safe electrical practices 3 Moving parts e g fan blade can crush and cut Keep hands clear 4 Make sure all food zones are clean after the unit is serviced For cleaning procedures see VI Cleaning Instructions A Diagnostic Procedure The diagnostic procedure is basically sequence check that allows you to diagnose the electrical system and components Before proceeding check for correct installation and proper voltage per unit nameplate As you go through the diagnostic procedure check to assure the components energize and de energize correctly If not those components or controls are suspect Always choose a white W neutral wire to establish a good neutral connection when checking high voltages If the display module is in alarm see 1 0 2 Alarm Safeties For further details see
8. Startup Cool Down EvapFM and MH energize There is a slight delay before cabinet temperature or high temperature alarm Hi appears on DM and Comp and ConFM energize 2 Cool Down Achieved CM monitors cooling of the cabinet via CTh CTh cools to 3 F 1 7 C below setpoint EvapFM and MH continue Comp and ConFM de energize 3 Cool Down Restart CTh warms to 3 F 1 7 above setpoint EvapFM and MH continue Comp and ConFM energize 4 Defrost dEF is displayed during defrost There is a 20 minute minimum defrost time and a 1 hour maximum defrost time a Temperature Initiation When DTh cools to 8 6 F 13 C defrost begins and MH continue Comp and ConFM de energize b Manual Initiation Manual defrost may be initiated by pressing and holding the lower button until JEF appears DM EvapFM and MH continue Comp and ConFM de energize C Termination DTh warms to 40 F 4 4 EvapFM and MH continue Comp and ConFM energize 2 minute temperature display delay timer starts 2 minute temperature display delay timer terminates and temperature display returns to DM Note There is a 2 hour minimum defrost interval Legend CM control module Comp compressor ConFM condenser fan motor CTh cabinet thermistor DM display module DTh defrost thermistor EvapFM evaporator fan motor MH mullion heater TA 1 Startup Cool Down MH and PH energize There is a slight delay before cabinet tem
9. module terminals and N5 If dEF is displayed and 115VAC is not present control module must be replaced 10 Check that the components restart after defrost termination Refrigerator Compressor and condenser fan motor energize as soon as the defrost thermistor termination temperature is satisfied See Defrost Termination under IV A 1 9 Defrost and IV C Thermistor Check If components fail to start control module must be replaced Freezer Compressor and condenser fan motor energize 3 minutes after defrost termination temperature is satisfied Evaporator fan motor energizes 5 minutes after that except manual defrost and the cabinet temperature appears on the display module 5 minutes after the evaporator fan motor energizes See Defrost Termination under 33 IV A 2 9 Defrost and IV C Thermistor Check If components fail to start control module must be replaced C Thermistor Check In the event the cabinet thermistor reading is out of range E1 alarm the compressor operates on a fixed time basis of 5 minutes on and 5 minutes off In the event the refrigerator defrost thermistor reading is out of range E2 alarm defrost initiation occurs every 4 hours of cumulative compressor run time and terminates on 20 minute minimum defrost timer In the event the freezer defrost thermistor reading is out of range E2 alarm defrost initiation occurs every 4 hours of cumulative compressor run time and terminates based
10. CR 6 check continuity of HPS If open allow time for HPS to reset If HPS does not reset replace HPS and diagnose reason for HPS activation See IV A 2 7 c HPS Activation If 115VAC is present between CR 5 and CR 6 and Comp and ConFM are not energized check for 115VAC between CR terminal 4 and neutral and CR terminal 1 and neutral If 115VAC is present between CR terminal 4 and neutral and not CR terminal 1 and neutral CR is defective and must be replaced If CR is good and Comp or ConFM are not energized check for 115 at Comp terminals Comp overload internal on 1 section external on 2 section start components and Comp and ConFM motor winding continuity 8 minute EvapFM delay timer terminates 3 minutes on manually initiated defrost Have EvapFM energized 5 minutes after Comp and ConFM energized If not confirm that the door s are closed and DS contacts are closed Check EvapFM blades for binding Next check for 115VAC at DSR terminals 7 and 8 If 115VAC is not present check DS continuity If 115VAC is present check DSR coil continuity and contact continuity between terminals 6 and 4 If coil or contacts are open DSR is bad and must be replaced Next check for 115VAC between CM F6 and CM N5 If 115VAC is not present check between CM L3 and CM 5 If 115VAC is present between CM L3 and CM N5 and not between CM F6 and CM N5 CM is defective and must be replaced If 115VAC is present between CM F6 and CM N5 check EvapFM conti
11. HIGH PRESSURE COMPRESSOR 280 MFD SWITCH INTERNAL 120V Wd de BK BK 0 BK BK 4 1 14 WIRE COLOR CODE COMPRESSOR RELAY BK BLACK BR BROWN BU BLUE CONDENSER GND DBU DARK BLUE BR A Ler GR GREEN av BU GY GRAY GND LBU LIGHT BLUE ORANGE _ oo High Pressure Switch Defrost Thermostat VIOLET Cut out 490 10 PSIG Cut out 120 F 5 F 49 C 3 C Ww WHITE Y YELLOW Cut in 370 20 PSIG Cut in 70 F 5 F 21 C 3 C 4 CF2B FS HS CF3B FS HS 1157 6071 GND L N GR PERIMETER HEATER S GY GY BK MULL ION HEATER DISPLAY BK BK w SWITCH MODULE NA amp 20 ERA MULL ION 2 9 Sls 1 2 DOOR ONLY gt 859 0 0 BE UMS AASE um Nw EC HORE MULLION HEATER 1 2 DOOR ONLY BK 0 0 w 4 4 4 HL DISPLAY BK BR W DEFROST CABINET nn THERM GND GR BR GR Lo BR BR w SU B
12. and Lower Buttons LED Display 16 2 Controls and Adjustments a Default Settings 1 Temperature Setting Refrigerator 36 2 C Freezer 4 F 20 C 2 Temperature Display Scale F b 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 refrigerator temperature setpoint of 36 F 2 C the compressor comes on at 39 F 3 7 C and the compressor goes off at 33 F 0 3 C If necessary adjust the temperature setpoint as follows 1 Press and hold the upper or lower button briefly then release The current temperature setpoint flashes Press the upper or lower button until the desired value is displayed After a few seconds the display returns to the current cabinet temperature and the temperature setpoint is saved For refrigerators the temperature setpoint is adjustable between 34 F and 52 F 1 C and 11 C Factory default is 36 F 2 C For freezers the temperature setpoint is adjustable between 15 F and 12 F 26 C and 11 C Factory default is 4 F 20 C Note Do not adjust the temperature setpoint outside of the factory specified range Adjustment outside of this range may prevent the unit from operating correctly c Changing the Temperature Display Scale F or C To change the temperature display sca
13. connections Confirm that the display module cable cabinet thermistor and defrost thermistor are properly connected 2 Move the power switch to the ON position 3 Check for 115VAC between control module terminals L3 and N5 If 115VAC is not present check power supply and power switch 4 Check that the display module is on and cabinet temperature is displayed If not it is recommended that both the control module and display module be replaced 5 Freezer Check that the evaporator fan motors are energized Make sure that the door s are closed and the door switch is engaged Next check for 115 between control module terminals F6 and N5 If 115VAC is not present the control module must be replaced 6 Check that the compressor and condenser fan motor energize If not check for 115 between control module terminals C1 and N5 If 115VAC is not present control module must be replaced Defrost 7 Press and hold the lower button until dEF appears on the display module 8 Confirm that the compressor condenser fan motor and evaporator fan motors freezer de energize Check for 115VAC between control module terminals C1 and N5 for compressor and condenser fan motor then between terminals F6 and N5 freezer for evaporator fan motors If dEF is displayed and there is 115VAC between the terminals control module must be replaced 9 Freezer Confirm that the defrost heater energizes Check for 115VAC between control
14. does not reset replace HPS and diagnose reason for HPS activation See IV A 1 7 c HPS Activation If 115VAC is present between CR 5 and CR 6 and Comp and ConFM are not energized check for 115VAC between terminal 4 and neutral and CR terminal 1 and neutral If 115VAC is present between CR terminal 4 and neutral and not CR terminal 1 and neutral CR is defective and must be replaced If CR is good and Comp or ConFM are not energized check for 115VAC at Comp terminals Comp overload integrated with start relay start components and Comp and ConFM motor winding continuity 2 minute temperature delay timer terminates temperature display appears on DM 10 MH Diagnosis Check that MH energizes Check for 115VAC at MH If 115VAC is not present check power supply and continuity of power switch If 115VAC is present check amp draw of MH If an amp reading is not present check the continuity of MH Legend CM control module Comp compressor ConFM condenser fan motor CR compressor relay CTh cabinet thermistor DM display module DS door switch DSR door switch relay DTh defrost thermistor EvapFM evaporator fan motors HPS high pressure switch MH mullion heater TXV thermostatic expansion valve 29 2 Freezer 7 Startup Cool Down MH and PH energize There is a slight delay then Comp ConFM and EvapFM energize and cabinet temperature or high temperature alarm Hi appears on DM Once DTh reaches 32 F 0 C 4 hour Comp cumulative
15. electric shock corrosion or failure 4 Before using a sanitizer such as inert soap and sodium hypochlorite chlorine bleach thoroughly read the manufacturer s instructions on its proper usage IMPORTANT 1 To prevent damage to the plastic surfaces do not use the following thinner benzine alcohol petroleum soap powder polishing powder alkaline cleaner acid scouring pad and especially those strong cleaners for use on a ventilating fan or a cooking range Also to prevent corrosion do not use sodium hypochlorite chlorine bleach on the stainless steel surfaces 2 Use a clean cloth for cleaning 1 Exterior Wipe the exterior occasionally with a clean soft cloth Use a damp cloth containing a neutral cleaner to wipe off oil or dirt buildup 2 Cabinet Interior Spills should be wiped up promptly to avoid unpleasant odors The cabinet interior should be cleaned periodically with a mild soap or detergent and warm water 3 Door Gaskets Door gaskets should be cleaned regularly with mild soap and warm water to remove dirt and grease 4 Shelves Remove and clean regularly B Maintenance 1 Condenser Check the condenser once a year and use a brush or vacuum cleaner to clean the condenser as required 2 Power Supply Connection If a plug power cord or receptacle three section models is damaged replace it Be sure to connect the ground wire 41 Shutdown and Long Storage WARNING 1 W
16. follow these instructions may result in death electric shock or fire Do not use an extension cord Make sure the power switch is in the OFF position before plugging in or unplugging the unit to reduce the risk of electric shock Do not use unit with 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 unit be sure to pull the plug not the cord and do not jerk the cord Before unplugging 4 prong plug rotate the plug counter clockwise to unlock it To reduce the risk of electric shock do not touch the plug or power switch with damp hands Do not make any alterations to the unit Alterations could result in electric shock injury fire or damage to the unit I Specifications A Nameplate Ratings Design Pressure AC Supply PSIG Refrigerant Voltage Amperes HIGH LOW CR2B FS HS CF2B FS HS _7 _ 240 120 12 1 450 250 17 1 CR3B FS HS 115 60 1 240 120 2 Section 12 CF3B FS HS 208 230 115 60 1 16 450 250 2 Section 17 See the nameplate for electrical and refrigeration specifications The nameplate is located inside the cabinet CRIB FSHS w CFIBFSHS 450 250 _ Note We reserve the right to make changes in specifications and design without prior notice B Dimens
17. lower Confirm DTh status See IV C Thermistor Check Has 4 hour Comp cumulative run timer satisfied Check that Comp ConFM and EvapFM de energize If not check for 115VAC between CM C1 and CM N5 then between CM F6 and CM N5 If 115VAC is present CM is defective and must be replaced If there is no voltage between CM C1 and CM N5 and Comp and ConFM do not de energize check for 115VAC between CR terminal 1 and neutral If 115VAC is present between CR terminal 1 and neutral CR is defective and must be replaced Confirm DH energizes If not check for 115VAC between CM H4 and CM N5 If 115VAC is not present and DTh is in proper range CM is defective and must be replaced If 115VAC is present confirm DH thermostat continuity DH amp draw and DH continuity 31 Defrost Termination Has DTh warmed to 59 15 If not yet confirmed confirm DTh status See IV C Thermistor Check If DTh is good but defrost termination temperature is not reached confirm DH amp draw and continuity If DTh is good and defrost termination temperature is reached DH de energizes and 3 delay timers start 3 minute Comp delay timer terminates Have Comp and ConFM energized after DH is de energized for 3 minutes If not check for 115VAC between CM C1 and CM N5 If 115VAC is not present CM is defective and must be replaced If 115VAC is present between CM C1 and CM N5 check for 115VAC on CR coil terminals 5 and 6 If 115VAC is not present between CR 5 and
18. peziB1eue ep N4UOD peziBieue HIN pezibieue ep dwon duo 71 peziBieue peziB1eue HIN peziB1eue HIN peziBieue peziB1eue pezi amp ieue dwog 87161009 Wadea dwoy Wadena 6 d pezi 1 611816 1 1 dwog uiu z uo dwog p Ul u1 d gt oai 101 u09 Ul YI I sues I 5 fe dsip 2 I 1uiodjes 1e 3 07 0 61 498 p 0021 408 0 71 466 9 14615 O 0 1005 51000 x 1000 gt 150120 cl 1soJ4jeg l 100272 000 dnwe s 71 Heya 4 14 b Freezer UO syes sues Jeuun dwog 091 4 sugs I UO syes 1euun 266 01 SUUEM i 9 0 4 28 JO 1e S i
19. replaced If 115VAC is present between CM C1 and CM N5 check for 115VAC on CR coil terminals 5 and 6 If 115VAC is not present between CH 5 and CR 6 check continuity of HPS If open allow time for HPS to reset If HPS does not reset replace HPS and diagnose reason for HPS activation See IV A 2 7 c HPS Activation If 115VAC is present between CR 5 and CR 6 and Comp and ConFM are not energized check for 115VAC between CR terminal 4 and neutral and CR terminal 1 and neutral If 115VAC is present between CR terminal 4 and neutral and not CR terminal 1 and neutral CR is defective and must be replaced If CR is good and Comp or ConFM are not energized check for 115VAC at Comp terminals Comp overload internal on 1 section external on 2 section start components and Comp and ConFM motor winding continuity If Comp and ConFM are energized and the cabinet does not cool down check for a restriction in the refrigeration circuit correct TXV operation and correct refrigerant charge 30 HPS Activation Confirm ConFM is energized and fan blade turns freely Check that the condenser coil is not clogged or restricted Check that there are no restrictions in the refrigeration circuit drier TXV Confirm that the location meets factory requirements This unit is not intended for outdoor use Normal operating ambient temperature should be within 45 F to 100 7 C to 38 The unit should not be located next to ovens grill
20. run timer starts 8 Startup Diagnosis Check that EvapFM energize If not confirm that the door s are closed and DS contacts are closed Check EvapFM blades for binding Next check for 115VAC at DSR terminals 7 and 8 If 115VAC is not present check DS continuity If 115VAC is present check DSR continuity and contact continuity between terminals 6 and 4 If coil or contacts are open DSR is bad and must be replaced Next check for 115VAC between CM F6 and CM N5 If 115VAC is not present check between CM L3 and N5 If 115VAC is present between CM L3 and CM N5 and not between CM F6 and CM 5 is defective and must be replaced If 115VAC is present between CM F6 and CM 5 check EvapFM continuity b Cool Down Diagnosis Confirm that Comp and ConFM energize and cabinet temperature appears on DM If not confirm 115VAC between CM L3 and CM N5 If 115VAC is not present confirm wiring connections are secure for both the power wire CM L3 and the neutral wire CM N5 If 115VAC is present and DM is off check that the display cable between CM and DM is not disconnected reconnect if loose If DM is still off CM or DM may be bad so replace both Next check that Comp and ConFM are energized If not check for 115VAC between CM C1 and CM N5 If 115VAC is present between CM L3 and CM N5 above and not between CM C1 and CM N5 check CTh status See IV C Thermistor Check If CTh ohm reading is in proper range CM is bad and must be
21. 0 VI Cleaning and Maintenance Instructions Lu essit npn mne cop bekannt 41 eng TPI UT 41 jore 41 2 ME 41 41 4 SHOES S 41 EB Malte 41 1 Condenser m 41 2 Power Supply 41 C Shutdown Long SONS CE cc 42 Important Safety Information Throughout this manual notices appear to bring your attention to situations which could result in death serious injury or damage to the unit WARNING Indicates a hazardous situation which could result in death or serious injury CAUTION Indicates a situation which could result in damage to the unit IMPORTANT Indicates important information about the use and care of the unit WARNING This unit 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 To reduce the risk of death electric shock serious injury or fire follow basic precautions including the following Only qualified service technicians should install service and maintain the unit Move the power switc
22. 4 5 gt 7 dwog pezifueue syes UO duo 4 Ul 14 gt 2 02 4o dnuejs 1 juiodjes e oqe ynejep 101984 je Aejaq 1 01 lutodjes suis UNI dwog 1615 JOW UNA i SWEM 9 41 408 1 JNOU t 01 51002 0 0 4 28 ULA 1s0JJoq 6 150 b 1003 eouenbegs 19793944 gt Mesay 1005 1002 9 1 71 UO LO T C Display Module When the power switch is moved to the ON position there is a slight delay then the current cabinet temperature is displayed From the display module the cabinet setpoint and temperature display scale can be changed For further details see II C 2 Controls and Adjustments Note When power is turned on the 2 hour high temperature alarm timer is bypassed Therefore a high temperature alarm can occur at startup To silence the alarm press and release the upper button Alarm clears once temperature is within factory parameters For details see II D 2 Alarm Safeties 1 Display Module Layout Display Module To Control Module X Display Cable gt Upper
23. B FS HS 1157 6071 DISPLAY BK MODULE 22 2 POWER 2 v SWITCH o i o ncn gt BK DES MULL ION HEATER 1172 DOOR OnLy BK o MD BK BR T Cw DISPLAY CABLE DEFROST CABINET THERM THERM one GR BR GR Du BR BR FLOAT SWITCH BU BU BK t am te N A BK BK LBU DOOR SWITCH CONTROL DOOR OPEN MODULE Ln 7 C L L H N F 2 3 4 5 6 8 o o o o 2 bau DBU CAB I LIG 4 3 EVAPORATOR gt 9 FAN DOOR SWITCH RELAY BK BK GND len EVAPORATOR FAN Pan GND Len GY HIGH PRESSURE SWITCH BK a START COMPRESSOR 280 COMPRESSOR AT DRON OVERLOAD BK BK 10 w o COMPRESSOR RELAY WIRE COLOR CODE BK BLACK BR BROWN BU BLUE DBU DARK BLUE GR GREEN GY GRAY LBU LIGHT BLUE ORANGE P PINK R RED VIOLET Ww WHITE Y YELLOW CONDENSER BR FAN BU GR GND Ler
24. Compressor red Fig 2 Freezer Control Module To Display Module N Display Cable Defrost Thermistor Cabinet Thermistor 234 ux Tl D 7 F6 Evaporator Fan Motor black N5 Neutral white 4 Defrost Heater black L3 Power Switch black C1 Compressor red 2 Alarm Safeties Alarm signals are designed to protect the unit and food product These alarms give information or warnings in the event the unit is operating out of acceptable parameters Should one of the alarms occur follow the instructions in the table below to address the alarm The alarm code flashes once every second with audible alarm To silence the alarm press and release the upper button Alarm Signals Alarm Code Corrective Action Reset Details Cabinet Thermistor Malfunction Alarm Cabinet thermistor disconnected shorted or open Check connection and continuity Reconnect or Cabinet thermistor has failed replace as needed Unit cycles 5 min on 5 min off Defrost Thermistor Malfunction Alarm Defrost thermistor disconnected shorted or open Check connection and continuity Reconnect or Defrost thermistor has failed replace as needed Unit cycles on and off with cabinet thermistor High Voltage Alarm 135 5 or The compressor de energizes if voltage protection more operates The voltage safeties automatically reset Lo
25. Hoshizaki America Inc Commercial Series Refrigerated Kitchen Equipment Models Reach In B Series SERVICE MANUAL Superior Degree of Reliability www hoshizaki com Number 73183 Issued 3 23 201 I IMPORTANT Only qualified service technicians should install service and maintain the unit No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the equipment in accordance with this manual may adversely affect safety performance component life and warranty coverage Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the unit Should the reader have any questions or concerns which have not been satisfactorily addressed please call write or send an e mail message to the Hoshizaki Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department Phone 1 800 233 1940 Technical Support 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport 9 hoshizaki com Web Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information Model Number Serial Number Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully be
26. IV B Control Module Check For factory default settings see II C 2 a Default Settings Note When power is turned on the 2 hour high temperature alarm timer is bypassed Therefore a high temperature alarm can occur at startup To silence the alarm press and release the upper button Alarm clears once temperature is within factory parameters IMPORTANT The maximum allowable voltage variation is x10 percent of the nameplate rating 115VAC is used as a reference voltage when checking voltage to components Voltage may vary depending on power supply Move the power switch to the OFF position Unplug the unit from the electrical outlet 3 Remove the control box cover Plug the unit back into the electrical outlet Move the power switch to the ON position 6 Confirm proper supply voltage 115VAC to the power switch On 3 section units also confirm proper supply voltage to the receptacle box 115VAC for refrigerator 208 230VAC for freezer Continue to IV A 1 Refrigerator or IV A 2 Freezer 27 1 Refrigerator 7 Startup Cool Down EvapFM and energize There is slight delay then Comp and ConFM energize and cabinet temperature or high temperature alarm Hi appears on DM Startup Diagnosis Check that EvapFM energize If not confirm that the door s are closed and DS contacts are closed Check EvapFM blades for binding Next check for 115VAC at DSR terminals 7 and 8 If 115VAC is not
27. Low Voltage Alarm 96VAC 5 or less Mer Waldo te High Temperature Alarm First try obvious corrections such as closing doors Note When power is turned on the and cleaning the condenser 2 hour high temperature alarm timer is bypassed Therefore a high temperature Automatically resets when temperature returns to alarm can occur at startup normal c Refrigerator Cabinet temperature has exceeded the setpoint temperature by 10 F 5 6 for more than 2 hours Freezer Cabinet temperature has exceeded the setpoint temperature by 27 F 15 C for more than 2 hours Low Temperature Alarm Automatically resets when temperature returns to normal Refrigerator amp Freezer Cabinet temperature has remained below the setpoint temperature by 8 F 4 4 for more than 2 hours Communication Error Alarm Check the connections at the control module and the display module If connections are good Communication between the control the control module and display module must be module and the display module has been replaced interrupted or disconnected The unit operates on a set 5 minutes on 5 minutes off cycle until communication is restored Compressor Off Unit compressor off Press and hold the upper and lower buttons until the temperature appears on the display 19 Compressor Overload Short Cycle Protection and High Pressure Switch 1 Compressor External or Internal Overload If combined t
28. U FLOAT SWITCH 4 N NON 4 BK DOOR SWITCH DOOR SWITCH R PEN R PEN CONTROL DOOR OPE DOOR OPE 80 MODULE 8 n 7 C LoL H N F BK BK 2 3 4 5 6 ts 0 9 9 9 DBU DBU CABINET 9 LIGHT BK v EVAPORATOR 5 7 DOOR SWITCH CABINET RELAY 4 BK BKO BK LIGHT T GND EVAPORATOR R BK FAN BK 6 BK GND EVAPORATOR GR FAN BK BK w GND HIGH PRESSURE GY BK BK BK BK DEFROST DEFROST HEATER THERMOSTAT W w 5 60 4 WIRE COLOR CODE RUN CAP 23 5 MFD BK BLACK BK AT 280V BR BROWN R BK COMPRESSOR SART BU BLUE COMPRESSOR RELAY DBU DARK BLUE He OVERLOAD BIO j BIO 2 i GR GREEN COMPRESSOR START CAP GY GRAY RELAY 410 MFD AT 165 w LBU LIGHT BLUE R GND ORANGE BR w 5 4 PINK GR N R RED miim V VIOLET GND CONDENSER W WHITE GR Y YELLOW R High Pressure Switch Defrost Thermostat 490 10 PSIG Cutout 120 F 59F 49 C 3 C 5 370 20 PSIG Cut in 70 F 5 F 21 3 5 CR3B FS HS Box Connection WIRE COLOR CODE BK GR BK BLACK 115 60 1 GR GREEN W WHITE N GND W 115 60 1 W GR 115 60 1 L GND L GND N TO SYSTEM TO SYSTEM
29. VAC is present between CR terminal 4 and neutral and not CR terminal 1 and neutral CR is defective and must be replaced If CR is good and Comp or ConFM are not energized check for 115VAC at Comp terminals Comp overload integrated with start relay start components and Comp and ConFM motor winding continuity If Comp and ConFM are energized and the cabinet does not cool down check for a restriction in the refrigeration circuit correct TXV operation and correct refrigerant charge C HPS Activation Confirm ConFM is energized and fan blade turns freely Check that the condenser coil is not clogged or restricted Check that there are no restrictions in the refrigeration circuit Confirm that unit location meets factory requirements This unit is not intended for outdoor use Normal operating ambient temperature should be within 45 F to 100 F 7 C to 38 The unit should not be located next to ovens grills or other high heat producing equipment The unit should not be located in a corrosive environment The unit should be a minimum of 4 11 cm from side walls A minimum of 10 25 cm overhead clearance should be provided for proper ventilation 28 8 Cool Down Achieved CTh cools to 3 F 1 7 C below setpoint EvapFM and MH continue Comp and ConFM de energize Diagnosis If Comp and ConFM do not de energize confirm CTh status See IV C Thermistor Check If CTh ohm reading is in range and Comp and ConFM do
30. and Maintenance Instructions A Service for Refrigerant Lines WARNING 1 Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA certified service personnel 2 Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere Use an electronic leak detector or soap bubbles to check for leaks Add 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 R 404A as mixture with pressurized for leak testing CAUTION Do not leave the system open for longer than 15 minutes when replacing or servicing parts The Polyol Ester POE oils used in R 134a and R 404A units can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing parts Always install 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 the drier in the direction of the refrigerant flow When brazing protect the drier by using wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 1 Refrigerant Recovery The unit is provided with refrigerant access valves Using proper refrigerant practices rec
31. emperature amperage value is above the limit specified by the compressor manufacturer the compressor overload operates independently to turn off the compressor The compressor overload de energizes the compressor until the temperature amperage value returns to an acceptable level f the condenser fan motor is operating and the compressor is off it is most likely that the compressor overload opened If both the compressor and condenser fan motor are off it is most likely the unit is off or the high pressure switch has opened For further details see IV Service Diagnosis On refrigerators the compressor overload is integrated with the start relay On 1 section freezers the compressor overload is internal On 2 section freezers the compressor overload is external 2 Short Cycle Protection There is a 2 minute minimum off time and on time for the compressor Note Time may vary with compressor overload or high pressure switch activation 3 High Pressure Switch If pressure on the high side of the unit 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 F Mullion Perimeter Heater Refrigerators and freezers with mullions are equipped with mullion heaters Freezers are also equipped with perimeter heaters The heaters are energized as soon as the power switch is turned on G Thermistors The cab
32. fore the unit is serviced or maintenance operations are performed Only qualified service technicians should install service and maintain the unit Read the warnings contained in this booklet carefully as they give important information regarding safety Please retain this booklet for any further reference that may be necessary CONTENTS Important Safety Information RE 5 52 DOC IMG sen Ec 7 A TT 7 B DIMENSIONS 7 1 Refrigerated Volume and Shelf Space 7 2 One Section Two Section Three Section 8 M oa 9 A OM SUC lorena 9 oo RT 9 MON 10 3 Three SEO een 11 Sequence of Operation quaD EU orn ON 12 1 Sequence Cycles and Shutdown 2 12 a Fel ve 12 Dr 13 2 Sequence F r UA Buan 14 Refrigerator EE S 14 DR RS 15 Display MOE eee 16 1 Display M d le 16 2 Controls and Lu Ue nah Enos bnt tama KU MM 17 BENN 18 1 Control Mod le LS Og 18 TED 19 E Compressor Overload Short Cycle Protection and High Pressure Switch
33. h to the OFF position then unplug the unit from the electrical outlet before servicing This unit requires an independent power supply See the nameplate for proper voltage and breaker fuse size Failure to use proper breaker or fuse can result in a tripped breaker blown fuse or damage to existing wiring This could lead to heat generation or fire 115V Units THIS UNIT MUST BE GROUNDED This unit is equipped with a 3 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 power cord and do not use an adapter plug Failure to follow these instructions may result in death electric shock or fire e 208 230V Units THIS UNIT MUST BE GROUNDED This unit is equipped with a 4 prong grounding plug to reduce the risk of potential shock hazards It must be plugged into a properly grounded independent 4 prong wall outlet If the outlet is a 3 prong outlet it is your personal responsibility to have a qualified electrician replace it with a properly grounded independent 4 prong wall outlet Do not remove the ground prong from the power cord and do not use an adapter plug After plugging in twist the plug clockwise to lock it into place Failure to
34. hen preparing the unit for long storage prevent the doors from closing to reduce the risk of children getting trapped 2 To reduce the risk of electric shock do not touch the attachment plug or power switch with damp hands 3 115V Units To unplug the unit be sure to pull the plug and do not jerk the power cord It could be damaged and cause fire or electric shock 4 208 230V Units To unplug the unit twist the plug counter clockwise then pull the plug and do not jerk the power cord It could be damaged and cause fire or electric shock 5 When shutting down the unit for more than one week move the power switch to the OFF position and unplug the unit 6 Do not plug in unplug the unit to start stop operation Make sure the power switch is in the OFF position before plugging in or unplugging the unit to reduce the risk of electric shock 1 Before shutting down the unit move the stored food into another refrigerator 2 Reach over the front panel and move the power switch to the OFF position The unit will shut down 3 Unplug the unit Before unplugging a 4 prong plug rotate the plug counter clockwise to unlock it IMPORTANT When preparing the unit for long storage clean the cabinet interior door gaskets and shelves See VI A Cleaning for details 42
35. inet thermistor is used for cabinet temperature control and the defrost thermistor is used for defrost cycle initiation and termination Thermistor resistance varies depending on temperature The control module monitors the resistance to control system operation No adjustment is required For further details see IV C Thermistor Check 20 Technical Data A Refrigeration Circuit Condenser I Condenser Fan Switch uy de High Side Expansion Valve Access Valve 8 Condensate Pump Low Side Compressor Access P Valve Evaporator Fans Defrost 2 or 3 depending on model Thermistor 1 Evaporator 2 m E Cabinet Thermistor Defrost Thermostat freezer only Reservoir Condensate Pump Float Switch 21 B Wiring Diagrams 1 CR1B FS HS CR3
36. ions 1 Refrigerated Volume and Shelf Space ETE ft ft CR1B FS HS CF2B FS HS 6 1 CR3B FS HS 3 CF3B FS HS Note We reserve the right to make changes in specifications and design without prior notice 2 One Section Two Section Three Section Unit mm in Top View Exterior Exterior Exterior Width W One 698 5 579 Section 27 5 22 8 Two 1397 1920 5 852 9 E S 7 1513 6 713 3 710 3 Section 55 75 61 33 58 23 E S 59 59 28 08 27 96 Three 2108 2 593 7 579 Section 83 23 37 22 8 Front View Side View Interior View W s D DHU DH DHL Additional Dimensions Interior Interior i i Leg Height Interior Width Height Depth Position Standard Option Option One 579 Section 22 8 1513 6 7112 ids 101 6 152 4 153 28 6 Section 50 3 59 59 28 4 6 6 02 1 13 Three 12775 579 Section 50 3 22 8 1 General Information A Construction 1 One Section Condenser Fan Motor Thermostatic Expansion Valve 4 Compressor r Control Box Control Module UM gt g r Front Panel Power Cord _ X Float Switch for N ED pe Condensate Pump gt eae Power Switch ce Door Lock 1 Reservoir Display Modu
37. le Cover Door 4 Reservoir Light Door Switch Door Gasket Evaporator Cabinet Thermistor Defrost Thermistor Evaporator Fan Shroud Model Shown CR1B FS CR1B FS HS and CF1B FS HS 2 Two Section Thermostatic Expansion Valve 4 Compressor 4 Power Switch Condenser Control Box Front Panel Control Module Float Switch Door Switch Reservoir 47 Cover sA p 14 R4 Condensate Reservoir Pump Power Cord Display Module Door Switch Door Gasket Evaporator Cabinet Thermistor Defrost Thermistor Evaporator Fan Shroud Model Shown CR2B HS CR2B FS HS and CF2B FS HS 10 3 Three Section Receptacle Box Top Receptacles Have Power Door Switch Lower Receptacles Do Not Control Module Control Box i Thermostatic Expansion Valve i M Thermostatic Expansion Valve 1 Condenser Fan Motor 7 Condenser Fan Motor t DEG Condenser 1 2 v 1 Reservoir Control Box y Front Panel Cover Compressor se al i qu al fi Switch C
38. le press the upper button for 5 seconds The current setting is displayed Press the upper button to change the scale After a few seconds the display returns to the current cabinet temperature and the setting is saved The factory default is F Note Pressing the upper and lower button at the same time for 5 seconds or until appears on the display module turns the compressor condenser fan motor and evaporator fan motor freezer off To turn the unit on again press the upper and lower button together for 5 seconds until the cabinet temperature appears on the display module CAUTION The three dashes must be cleared otherwise the compressor will not run and product will be lost d Manual Defrost Manual defrost may be initiated by pressing and holding the lower button for 5 seconds dEF appears in the display For further details see II B 1 Sequence Cycles and Shutdown D Control Module All models are pretested and factory set CAUTION 1 The control module is fragile handle very carefully 2 Do not change wiring and connections Never misconnect terminals 3 Do not short out power supply to test for voltage 1 Control Module Layout Refrigerator Control Module To Display Module N Display Cable Defrost Thermistor Cabinet Thermistor JE N5 Neutral white L3 Power Switch black C1
39. not de energize CM is defective and must be replaced 9 Defrost Temperature Initiated Defrost DTh cools to 8 6 F 13 C EvapFM and MH continue Comp and ConFM de energize Defrost Termination DTh warms to 40 4 4 EvapFM and MH continue Comp and ConFM energize 2 minute temperature display delay timer starts 2 minutes later cabinet temperature appears on DM Defrost Diagnosis Defrost Initiation Has cooled to 8 6 F 13 C or lower Confirm DTh status See IV C Thermistor Check If DTh is in proper range confirm that Comp and ConFM de energize If not check for 115VAC between CM C1 and CM N5 If 115VAC is present and DTh is within proper range CM is defective and must be replaced If there is no voltage between CM C1 and CM N5 and Comp and ConFM do not de energize check for 115VAC between CR terminal 4 and neutral If 115VAC is present between CR terminal 4 and neutral CR is defective and must be replaced Defrost Termination Has DTh warmed to 40 F 4 4 C If not yet confirmed confirm DTh status See IV C Thermistor Check If DTh is in proper range has Comp and ConFM energized If not check for 115VAC between CM C1 and CM 5 If 115VAC is not present CM is defective and must be replaced If 115VAC is present between CM C1 and CM 5 check for 115VAC on CR coil terminals 5 and 6 If 115VAC is not present between CR 5 and CR 6 check continuity of HPS If open allow time for HPS to reset If HPS
40. ntrol Module If three dashes appear on the display module when energized the compressor and display module are off To turn the compressor and display module on press and hold the upper and lower buttons until the temperature appears on the display CAUTION The three dashes must be cleared otherwise the compressor will not run and product will be lost C Door Re Hinging This unit 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 an HS kit from your local Hoshizaki distributor is required See the table below CAUTION Improper installation of the HS kit may result in the doors not closing completely and or the gaskets not sealing correctly For further details contact your local Hoshizaki distributor or Hoshizaki Technical Support at 1 800 233 1940 Convert HS Kit Number Right Hinge to Left Hinge HS 3725 Left Hinge to Right Hinge HS 3726 40 VI Cleaning and Maintenance Instructions A Cleaning WARNING 1 Before cleaning the unit move the power switch to the OFF position and unplug the unit to prevent electric shock by unexpected entrance of water into the unit or injury by moving parts 2 Before cleaning the unit move all foods into another clean refrigerator or freezer 3 Do not splash water directly onto the unit This might cause short circuit
41. nuity 13 minute temperature display delay timer terminates Confirm cabinet temperature appears on DM 5 minutes after EvapFM energizes If components fail to start after delay timer terminates CM is defective and must be replaced 10 MH and PH Diagnosis Check that MH and PH energize Check for 115VAC at MH and PH If 115VAC is not present check power supply and continuity of power switch If 115VAC is present check amp draw of MH or PH If an amp reading is not present check the continuity of MH or PH Legend CM control module Comp compressor ConFM condenser fan motor CR compressor relay CTh cabinet thermistor DH defrost heater DM display module DSR door switch relay DTh defrost thermistor EvapFM evaporator fan motors HPS high pressure switch MH mullion heater PH perimeter heater TXV thermostatic expansion valve 32 B Control Module Check Before replacing control module that does not show visible defect and that you suspect is bad always conduct the following check procedure This procedure will help you verify your diagnosis Always choose white W neutral wire to establish good neutral connection when checking high voltages Also confirm that there is good neutral connection to the control module terminal 5 Alarm Reset To silence the alarm press and release the upper or lower button with power For alarm information see 11 0 2 Alarm Safeties Startup Cool Down 1 Check all wiring
42. on cabinet thermistor temperature To check thermistor resistance follow the steps below Move the power switch to the OFF position then unplug the unit Remove the control box cover Disconnect and remove the thermistor in question Immerse the thermistor sensor portion in glass containing ice and water for 2 to 3 minutes 5 Check the resistance between the wires at the thermistor connector Normal reading is within 16 0 to 16 7 If outside the normal reading replace the thermistor 6 Reconnect and replace the thermistor in its correct position See V B Important Notes for Component Replacement 7 Plug the unit back in Move the power switch to the ON position 1 2 3 4 s r 34 D Diagnostic Chart Before consulting the diagnostic charts check the following Check the setpoint For factory default settings see II C 2 a Default Settings Make sure the doors are not left open or opened too often and that they are sealing properly Make sure the cabinet is not overloaded with warm or hot product or product blocking airflow Product should be allowed to cool before putting in the unit Check for correct installation and proper voltage per unit nameplate This unit is not intended for outdoor use Normal operating ambient temperature should be within 45 F to 100 F 7 C to 3890 The unit should not be located next to ovens grills or other high heat producing equipment The unit sh
43. ould be a minimum of 4 11 cm from side walls and a minimum of 10 25 cm overhead clearance should be provided for proper ventilation Check the control module using the steps in IV B Control Module Check 1 Unit Not Cooling three section receptacle box only top receptacles have power 2 Cord and Plug a Loose connection On three section model check receptacle box cord and plug and one section and two section cords b Defective and plugs hdd 5 Control Module a In alarm or displayed See 11 0 2 Alarm Safeties and 3 Control Module Check 10 Compressor Relay m 35 14 Evaporator Clogged or frozen See 2 Evaporator is Frozen Up 15 Refrigerant Refrigerant Lines a Gas leak b Refrigerant lines restricted 2 Evaporator is Frozen Up 3 Defrost Fails to Terminate Defrost Fails to Terminate Possible Cause 1 Defrost Thermistor a Out of position or defective 2 Control Module a Defective 36 V Replacement of Components WARNING 1 This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire 2 Move the power switch to the OFF position then unplug the unit from the electrical outlet before servicing 3 Make sure all food zones in the icemaker and storage bin are clean after the unit is serviced For cleaning procedures see VI Cleaning
44. over the refrigerant from the access valves and store it in an approved container Do not discharge the refrigerant into the atmosphere 37 2 Brazing WARNING 1 R 134a and R 404A themselves are not flammable at atmospheric pressure and temperatures up to 176 F 80 C 2 R 134a and R 404A themselves are not explosive or poisonous However when exposed to high temperatures open flames R 134a and R 404A 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 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 140PSIG DO NOT use R 134a or R 404A 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 CAUTION 1 Always install a new drier every time the sealed refrigeration system is opened 2 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 3 When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 121 C 2 Use an electronic leak detector or soap bubbles to check for leaks Add a t
45. perature or high temperature alarm Hi appears on DM and Comp ConFM and EvapFM energize 2 Cool Down Achieved CM monitors cooling of the cabinet CTh CTh cools to 3 F 1 7 C below setpoint EvapFM MH and PH continue Comp and ConFM de energize 3 Cool Down Restart CTh warms to 3 F 1 7 above setpoint EvapFM MH and PH continue Comp and ConFM energize 4 Defrost dEF is displayed during defrost There is a 5 minute minimum defrost time and a 1 hour maximum defrost time Temperature Time Initiation cools to 32 F 0 C then a 4 hour cumulative Comp run timer starts Once 4 hour cumulative Comp run timer terminates and DTh is at or below 32 F 0 C defrost begins DH energizes MH and PH continue Comp ConFM and EvapFM de energize b Manual Initiation Manual defrost may be initiated by pressing and holding the lower button until dEF appears on DM MH and PH continue DH energizes Comp ConFM and EvapFM de energize c Termination 1 After Temperature Time Initiation DTh warms to 59 F 15 C 3 minute Comp delay timer starts 8 minute EvapFM delay timer starts and 13 minute temperature display delay timer starts MH and PH continue DH de energizes 3 minute Comp delay timer terminates Comp and ConFM energize 5 minutes later 8 minute EvapFM delay timer terminates and EvapFM energizes 5 minutes after EvapFM energizes 13 minute temperature display delay timer terminates and cabinet
46. present check DS continuity If 115VAC is present check DSR continuity and contact continuity between terminals 6 and 4 If coil or contacts are open DSR is bad and must be replaced If DSR is good check EvapFM continuity b Cool Down Diagnosis Confirm that Comp and ConFM energize and cabinet temperature appears on DM If not confirm 115VAC between CM L3 and CM N5 If 115VAC is not present confirm wiring connections are secure for both the power wire CM L3 and the neutral wire CM N5 If 115VAC is present and DM is off check that the display cable between CM and DM is not disconnected reconnect if loose If DM is still off CM or DM may be bad so replace both Next check that Comp and ConFM are energized If not check for 115VAC between CM C1 and CM N5 If 115VAC is present between CM L3 and CM N5 above and not between CM C1 and CM N5 check CTh status See IV C Thermistor Check If CTh ohm reading is in proper range CM is bad and must be replaced If 115VAC is present between CM C1 and CM N5 check for 115VAC on CR coil terminals 5 and 6 If 115VAC is not present between CH 5 and CR 6 check continuity of HPS If open allow time for HPS to reset If HPS does not reset replace HPS and diagnose reason for HPS activation See IV A 1 7 c HPS Activation If 115VAC is present between CR 5 and CR 6 and Comp and ConFM not energized check for 115VAC between CR terminal 4 and neutral and CR terminal 1 and neutral If 115
47. race 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 or R 404A as a mixture with pressurized air for leak testing 3 Evacuation and Recharge 1 Attach a vacuum pump to the system Be sure the charging hoses are connected to both high and low side access valves 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 Open the gauge manifold valves 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 38 4 Close the low side valve and high side valve on the gauge manifold 5 Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder Remember to loosen the connection 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 ARI Standard 700 latest edition be used 6 A liquid charge is required when charging an R 404A system to prevent fractionation and optional when charging an R 134a system Place the service cylinder on the scales if the service cylinder is not equipped with
48. s or other high heat producing equipment The unit should not be located in corrosive environment The unit should be minimum of 4 11 cm from side walls minimum of 10 25 cm overhead clearance should be provided for proper ventilation 8 Cool Down Achieved CTh cools to 3 F 1 7 C below setpoint EvapFM and PH continue Comp and ConFM de energize Diagnosis If Comp and ConFM do not de energize confirm CTh status See Thermistor Check If CTh ohm reading is in proper range and Comp and ConFM do not de energize CM is defective and must be replaced 9 Defrost Temperature Time Initiated Defrost Once DTh cools to 32 F 0 C a 4 hour cumulative Comp run timer starts Once DTh is at or below 32 F 0 C and 4 hour cumulative Comp run timer terminates MH and PH continue DH energizes and Comp ConFM and EvapFM de energize Defrost Termination DTh warms to 59 F 15 C MH and PH continue DH de energizes 3 minute Comp delay timer starts 8 minute EvapFM delay timer starts 3 minutes on manually initiated defrost and 13 minute temperature display delay timer starts 3 minute Comp delay timer terminates Comp and ConFM energize 5 minutes later 8 minute EvapFM delay timer terminates and EvapFM energizes 5 minutes after that 13 minute temperature display delay timer terminates and cabinet temperature appears on DM Defrost Diagnosis Defrost Initiation Has cooled to 32 F 0 C or
49. temperature returns to DM 2 After Manual Initiation DTh warms to 59 F 15 C MH and PH continue DH de energizes 3 minute Comp EvapFM delay timer starts 13 minute temperature display delay timer starts 3 minute Comp EvapFM delay timer terminates Comp ConFM and EvapFM energize 10 minutes later 13 minute temperature display delay timer terminates and cabinet temperature returns to DM Note There is a 4 hour minimum defrost interval Legend CM control module Comp compressor ConFM condenser fan motor CTh cabinet thermistor DH defrost heater DM display module DTh defrost thermistor EvapFM evaporator fan motor MH mullion heater PH perimeter heater 2 Sequence Flow Charts a Refrigerator QUN 4 euin SI 5115 Aejdsip p seziBjeue ep duo USYM syeys JAW duo 2 150JJep u LA seziB1eue ueuw SES uo 2 JOJSIUWJSY jeuiqgo u 5 SH uo peuedo si Joop jeddn Jesuepuoo yJuo2 USYM pue 4 UO peuedo s 100p JOSSSIdWod dwog Jejeay Uol INW HIN JOJOW SJON pezi amp ieue ep
Download Pdf Manuals
Related Search