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2. Evaporator Frozen Up

Evaporator Frozen Up - Possible Cause

1. Evaporator

a) Dirty.

2. Evaporator Fan Motor

a) Fan blades binding.
b) Defective.

3. Defrost Thermistor

a) Out of position or defective.

4. Control Module

a) Defective.

5. Compressor Relay

a) Defective.

6. Refrigerant Charge/Refrigerant

Lines

a) Low.
b) Component restriction (TXV, cap tube, drier).

7. Defrost Heater (freezer)

a) Defective.

8. Defrost Thermostat (freezer)

a) Defective.

3. Defrost: Control Module

Refrigerator Defrost Fails to Initiate - Possible Cause

1. Defrost Thermistor (Confirm

DTh status. See "II.D. Thermistor
Check.")

a) Defrost initiation temperature 8.6°F (-13°C) not achieved. See "1. Not

Cooling."

b) Out of position or defective.

2. Compressor Relay

a) Defective.

3. Control Module

a) Defective.

Refrigerator Defrost Fails to Terminate - Possible Cause

1. Defrost Thermistor (Confirm

DTh status. See "II.D. Thermistor
Check.")

a) Defrost termination temperature 40°F (4.4°C) not achieved.

b) Defective.

2. Compressor Relay

a) Defective.

3. Control Module

a) Defrost thermistor connection loose.
b) Defective.

Freezer Defrost Fails to Initiate - Possible Cause

1. Defrost Thermistor (Confirm

DTh status. See "II.D. Thermistor
Check.")

a) Defrost initiation temperature 32°F (0°C) not achieved. See "1. Not

Cooling."

b) Out of position or defective.

2. Compressor 4-hr. cumulative run

timer not satisfied.

a) Check compressor operation. See "1. Not Cooling."

3. Control Module

a) Defective.

Freezer Defrost Fails to Terminate - Possible Cause

1. Defrost Thermistor (Confirm

DTh status. See "II.D. Thermistor
Check.")

a) Defrost termination temperature 59°F (15°C) not achieved.
b) Defrost thermistor connection loose.

2. Defrost Heater

a) Defrost thermostat defective.
b) Defective.

3. Compressor Relay

a) Defective.

4. Control Module

a) Defective.

Содержание Reach-In S-Series

Страница 1: ... A Superior Degree of Reliability www hoshizaki com Models Reach In S Series Commercial Series Refrigerated Kitchen Equipment Hoshizaki America Inc Number 73207 Issued 8 3 2015 Revised 11 20 2015 SERVICE MANUAL ...

Страница 2: ...on is not covered under warranty Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance 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...

Страница 3: ... Service Diagnosis 11 1 Refrigerator 12 2 Freezer 14 C Control Module Check 19 D Thermistor Check 20 E Diagnostic Tables 21 III Controls and Adjustments 23 A Control Module 23 1 Display Icons 23 2 Display Layout 23 3 Control Module Connections 24 B Temperature 25 1 Default Settings 25 2 Temperature Setpoint 25 3 Changing the Temperature Display Scale F or C 25 C Defrost 26 D Alarm Safeties 26 E Sa...

Страница 4: ...pliance must be installed in accordance with applicable national state and local codes and regulations 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 or damage to existing wiring This could lead to heat generation or fire To...

Страница 5: ...plash pour or spray water directly onto or into the appliance This might cause short circuit electric shock corrosion or failure Do not make any alterations to the appliance Alterations could result in electric shock injury fire or damage to the appliance The appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience a...

Страница 6: ... 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 Do not store items near the air ou...

Страница 7: ...or Gasket Control Box Power Switch Door Lock Model Shown CR1S FS Light Compressor Power Cord Door Switch Evaporator Cabinet Thermistor Defrost Thermistor Evaporator Fan Shroud Thermostatic Expansion Valve Light Switch glass door models only Condensate Pan Pressure Relief Valve Condensate Tube and Spring ...

Страница 8: ...or Fans quantity depends on model Evaporator Thermostatic Expansion Valve Compressor Condensate Pan High Pressure Switch Drier Condenser Fan Condenser Defrost Thermistor Defrost Heater and Defrost Thermostat freezer only Cabinet Thermistor ...

Страница 9: ...oint 4 Defrost 2 Hr Comp Cumulative Run Timer Terminates EvapFM energized Comp de energized ConFM de energized 5 Defrost Termination DTh warms to 40 F 4 4 C or 1 Hr Maximum Defrost Timer Terminates Note a EvapFM de energizes when door is opened on FS models and when upper door is opened on HS models b 2 min minimum Comp on timer starts when Comp energizes c 2 min minimum Comp off timer starts when...

Страница 10: ...te a EvapFM de energizes when door is opened on FS models and when upper door is opened on HS models b 2 min minimum Comp on timer starts when Comp energizes c 2 min minimum Comp off timer starts when Comp de energizes d 5 min minimum defrost time e 1 hr maximum defrost time f 3 min Comp ConFM delay timer starts when defrost termination temperature is met g 7 minute EvapFM delay timer starts when ...

Страница 11: ... appliance must not be located in a corrosive environment Minimum Clearance Side Top Rear 3 8 cm 12 31 cm 1 3 cm The diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components Before proceeding check for correct installation and proper voltage per nameplate Always choose a neutral W to establish a good neutral connection when checking high voltages If...

Страница 12: ...15VAC is present at CLS BK and CL is not energized replace CL FS HS CL Diagnosis Open the door upper on HS and confirm CL is energized If not with the door open check for 115VAC at DSR 5 BK to neutral W and DSR 1 V or Y to neutral W If 115VAC is not present at DSR 5 BK confirm power supply and continuity of power switch If 115VAC is present at DSR 5 BK and not present at DSR 1 V or Y check DS cont...

Страница 13: ...uring defrost There is a 20 min minimum defrost time a 1 hr maximum defrost time and a 2 hr minimum defrost interval 1a Time Initiated When 2 hr cumulative Comp run timer terminates defrost starts off cycle EvapFM continues Comp and ConFM de energize 1b Manually Initiated To initiate a manual defrost press the manual defrost button on display Defrost icon turns on and if energized Comp and ConFM d...

Страница 14: ...tral W If 115VAC is not present at DSR 5 BK confirm power supply and continuity of power switch If 115VAC is present at DSR 5 BK and not present at DSR 1 V or Y check DS continuity If DS is disengaged and contacts are closed DSR energized replace DS If DSR is de energized and 115VAC is present at DSR 5 BK and not at DSR 1 V or Y to neutral W replace DSR If 115VAC is present at DSR 1 V or Y and CL ...

Страница 15: ...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 TXV and 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 8 Cool Down Achieved...

Страница 16: ...e Defrost Diagnosis 1a Temperature Time Initiation Has DTh cooled to 32 F 0 C or lower Before proceeding confirm DTh status See II D Thermistor Check Has 4 hr Comp cumulative run timer satisfied 1 CM Diagnosis Confirm defrost icon turns on dEF is displayed and Comp and EvapFM icons turn off If not replace CM 2 DH and DrH Diagnosis Confirm DH and DrH energize If not check for 115VAC at CM H4 O to n...

Страница 17: ... CR 6 R to neutral W If 115VAC is present at CR 4 BK to neutral W but not at CR 6 R to neutral W replace CR If 115VAC is present at CR 6 R and Comp or ConFM are not energized check Comp start components Comp protector internal on 1 section external on 2 section and Comp motor winding continuity If ConFM is not energized check ConFM fan blades for binding and motor winding continuity 2 7 min EvapFM...

Страница 18: ...on 1 section external on 2 section and Comp motor winding continuity If ConFM is not energized check ConFM fan blades for binding and motor winding continuity EvapFM Confirm EvapFM icon turns on and EvapFM energizes If not confirm doors are closed and DS engaged Next check for 115VAC at CM F5 Y or W BU to neutral W If 115VAC is not present replace CM If 115VAC is present check for 115VAC at DSR 4 ...

Страница 19: ...115VAC at CM C1 R or V to neutral W If 115VAC is not present replace CM Defrost 7 Manual Defrost Check Press the manual defrost button briefly If on Comp and EvapFM icons turn off Defrost icon turns on and dEF is displayed 8 Confirm Comp ConFM and EvapFM freezer de energize Check for 115VAC at CM C1 R or V to neutral W for Comp and ConFM then at CM F5 Y or W BU freezer to neutral W for EvapFM If d...

Страница 20: ... timer In the event the freezer defrost thermistor reading is out of range E2 alarm defrost initiation occurs every 4 hr of cumulative compressor run time and terminates based on cabinet thermistor temperature To check thermistor resistance follow the steps below 1 Move the power switch to the OFF position then unplug the appliance 2 Remove the control box cover 3 Disconnect and remove the thermis...

Страница 21: ...b Faulty 5 Control Module See III D Alarm Safeties and II C Control Module Check a In alarm b Defective 6 Door Switch a Not engaged b Defective 7 Door Switch Relay a Loose connection b Defective 8 Evaporator Fan Motor a Defective 9 High Pressure Switch a Dirty condenser b Ambient temperature too warm c Condenser fan motor not operating d Refrigerant overcharge e Refrigerant lines or components res...

Страница 22: ...t Fails to Terminate Possible Cause 1 Defrost Thermistor Confirm DTh status See II D Thermistor Check a Defrost termination temperature 40 F 4 4 C not achieved b Defective 2 Compressor Relay a Defective 3 Control Module a Defrost thermistor connection loose b Defective Freezer Defrost Fails to Initiate Possible Cause 1 Defrost Thermistor Confirm DTh status See II D Thermistor Check a Defrost initi...

Страница 23: ...feties NOTICE The control module is fragile handle very carefully Do not change wiring and connections Never misconnect terminals Do not short out power supply to test for voltage 1 Display Icons Control Module Icons Icon Meaning Compressor Compressor running Defrost Appliance is in defrost cycle See II B Service Diagnosis for details Evaporator Fan Motor Icon is Applicable to Freezers Only Evapor...

Страница 24: ...ompressor R L2 Power Supply BK N3 Neutral W F5 Evaporator Fan Motor Y Freezer H4 Defrost Heater O Freezer Cabinet Thermistor Defrost Thermistor Auxiliary Code XX and Earlier Auxiliary Code XX and Later C1 Compressor V L2 Power Supply BK N3 Neutral W F5 Evaporator Fan Motor W BU Freezer H4 Defrost Heater O Freezer ...

Страница 25: ...emperature 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 app...

Страница 26: ...n off E02 Defrost Thermistor Malfunction Alarm Defrost thermistor has failed Beeps for 10 sec then silent for 50 sec To silence the alarm press and release the up button Appliance cycles on and off with cabinet thermistor Hi High Temperature Alarm Refrigerator Cabinet temperature has remained above 57 F 13 9 C for more than 2 hr Freezer Cabinet temperature has remained above 26 F 3 3 C for more th...

Страница 27: ... is off or the high pressure switch has opened For further details see II B Service Diagnosis On refrigerators and 1 section freezers the compressor protector is an internal protector On 2 section freezers the compressor protector is an external protector 2 Short Cycle Protection There is a 2 min minimum off time and on time for the compressor Note Time may vary with compressor protector or high p...

Страница 28: ...ressure using nitrogen gas 140 PSIG DO NOT use R 134a or R 404A as a mixture with pressurized air for leak testing NOTICE 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 and R 404A appliances can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing pa...

Страница 29: ...nstall the new drier with the arrow on the drier in the direction of the refrigerant flow 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 ...

Страница 30: ...ng 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 If necessary add any remaining charge to the system through the low side NOTICE To prevent compress...

Страница 31: ...er make sure the defrost thermistor wire is not touching the defrost heater C Door Reversal The 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 an HS kit from your local Hoshizaki distributor is required See the table below NOTICE Improper installatio...

Страница 32: ...ric shock do not touch the power switch or plug with damp hands Before performing maintenance move all foods into another clean refrigerator or freezer 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 w...

Страница 33: ...o the OFF position and unplug the appliance Do not plug in unplug the appliance to start stop operation Make sure the power switch is in the OFF position before plugging in or unplugging the appliance to reduce the risk of electric shock 1 Before shutting down the appliance move the stored food into another refrigerator or freezer 2 Reach over the front panel and move the power switch to the OFF p...

Страница 34: ...f 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 applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel ...

Страница 35: ... FSL HS HSL 9 450 250 7 5 CR2S FS HS 7 240 120 12 CR2S FGY 6 2 14 CF2S FS HS 11 450 250 17 CF2S FGY 9 8 CR3S FS HS 115 60 1 12 240 120 1 Section 11 2 Section 12 CF3S FS HS 208 230 115 60 1 16 450 250 1 Section 8 2 Section 17 See the nameplate for electrical and refrigerant data The nameplate is located inside the cabinet We reserve the right to make changes in specifications and design without pri...

Страница 36: ...ET LIGHT DOOR OPEN DOOR SWITCH R L N 115 60 1 W START RELAY DOOR SWITCH RELAY POWER SWITCH BK BK EVAPORATOR FAN BK BK BK BK GR GND EVAPORATOR FAN BK BK HIGH PRESSURE SWITCH 4 0 6 1 COMPRESSOR RELAY 7 8 6 4 2 5 3 1 LBU V DBU BK W W BK BK W BK W W BK R W W BK GY BK 10 11 BK R BK DBU BK LBU BK W W W C BR BU B D CABINET THERM BR BU 3A8726 012 CR1S FS FSL W W BK BK W BK BK DBU BK W R W BK W W W W W STA...

Страница 37: ...LAY POWER SWITCH BK BK EVAPORATOR FAN BK BK BK BK GR GND EVAPORATOR FAN BK BK HIGH PRESSURE SWITCH 4 0 6 1 COMPRESSOR RELAY 7 8 6 4 2 5 3 1 LBU V DBU BK W W BK BK W BK W W R W W BK GY BK BK 10 11 13 12 14 GR GND EVAPORATOR FAN BK BK CABINET LIGHT DOOR OPEN DOOR SWITCH BK W R BK BK BK BK W DBU W W V V LBU BK CONTROL MODULE 6 F 5 H 4 L 2 C 1 N 3 A DEFROST THERM C BR BU B D CABINET THERM BR BU CR2S F...

Страница 38: ...FS HS CR2S FGY FS HS CR_S FGY CR2S FGY CR_S FS HS CR1S FGY CR1S FS CR1S HS CR2S FGY CR2S FS CR2S HS High Pressure Switch Cut out 300 10 PSIG Cut in 190 20 PSIG 3 CR1S FGY FS FSL HS HSL CR2S FGY FS HS and CR3S FS HS Auxiliary Code E 6 and Later ...

Страница 39: ...39 4 CF1S FS FSL HS HSL Auxiliary Code E 5 and Earlier Defrost Thermostat Cut out 120 F 5 F 49 C 3 C Cut in 70 F 5 F 21 C 3 C High Pressure Switch Cut out 490 10 PSIG Cut in 370 20 PSIG ...

Страница 40: ...1S FS HS CF1S HS PROTECTOR INTERNAL Defrost Thermostat Cut out 120 F 5 F 49 C 3 C Cut in 70 F 5 F 21 C 3 C High Pressure Switch Cut out 490 10 PSIG Cut in 370 20 PSIG 5 CF1S FS FSL HS HSL Auxiliary Code E 6 and Later ...

Страница 41: ...41 6 CF2S FS HS Auxiliary Code E 5 and Earlier Defrost Thermostat Cut out 120 F 5 F 49 C 3 C Cut in 70 F 5 F 21 C 3 C High Pressure Switch Cut out 490 10 PSIG Cut in 370 20 PSIG ...

Страница 42: ...XTERNAL CF2S HS CF2S FGY CF2S FS HS Defrost Thermostat Cut out 120 F 5 F 49 C 3 C Cut in 70 F 5 F 21 C 3 C High Pressure Switch Cut out 490 10 PSIG Cut in 370 20 PSIG 7 CF2S FS FSL HS HSL Auxiliary Code E 6 and Later ...

Страница 43: ...stem To 1 Section System Power Cord Receptacle Box Top Receptacle Top Receptacle To 2 Section System To 1 Section System Power Cord Receptacle Box Top Receptacle Top Receptacle Note Only the top receptacles have power Note Only the top receptacles have power ...

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