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Hoshizaki TempGuard FH1-SSB, Service Manual, Page: 3 / 63

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Hoshizaki TempGuard FH1-SSB Service Manual Download Page 3

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Please review this manual. It should be read carefully before the unit is serviced or 
maintenance operations are performed. Only qualified service technicians should service 
and maintain the unit. This manual should be made available to the technician prior to 
service or maintenance.

CONTENTS

I. Specifications ...................................................................................................................... 5

A. Nameplate Ratings........................................................................................................ 5
B. Dimensions ................................................................................................................... 6

1. Notes for All Units .................................................................................................... 6
. RH1-SSB(-HD), FH1-SSB(-HD), RFH1-SSB-HD, RH1-SSB-GD ............................ 7
3. RH-SSB(-HD), FH-SSB(-HD), RFH-SSB(-HD), RH-SSB-GD ......................... 8
4. RH3-SSB(-HD), FH3-SSB(-HD), RFH3-SSB(-HD), RH3-SSB-GD ......................... 9
5. PTR1SSB-xxxx, PTR1-SSB01-10 ......................................................................... 10

II. General Information ......................................................................................................... 11

A. Sequence of Operation and Timing Charts ................................................................. 11

1. Refrigerator and Refrigerator Side of Dual Temp Models ...................................... 11
. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier ..... 13
3. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later ........ 15
4. Freezer Side of RFH1-SSB-HD ............................................................................. 17

B. Display Board .............................................................................................................. 19
C. Control Board .............................................................................................................. 0

1. Location ................................................................................................................. 0
. Control Board Layout ............................................................................................. 1

D. Settings and Diagnostics ............................................................................................. 

1. Guarded Access Menu  ......................................................................................... 

a) Temperature Setpoint  ...................................................................................... 
b) Defrost Frequency   ......................................................................................... 
c) Temperature Display Scale (°F or °C) .............................................................. 3

. Diagnostics Menu  ................................................................................................. 4

E. Alarm Signals and Countermeasures ......................................................................... 5
F. Compressor Protector .................................................................................................. 6
G. Perimeter Frame Heater ............................................................................................. 6
H. Glass Door Heater ...................................................................................................... 6

III. Service Diagnosis ........................................................................................................... 7

A. Diagnosis Chart .......................................................................................................... 7
B. Thermistor Check ........................................................................................................ 30

IV. Removal and Replacement of Components ................................................................... 31

A. Service for Refrigerant Lines ...................................................................................... 31

1. Refrigerant Recovery ............................................................................................. 31
. Brazing .................................................................................................................. 31
3. Evacuation and Recharge ..................................................................................... 3

B. Removal and Replacement of Compressor ................................................................ 33
C. Removal and Replacement of Expansion Valve ......................................................... 34
D. Removal and Replacement of Evaporator .................................................................. 35
E. Removal and Replacement of Evaporator Fan Shroud Assembly .............................. 36
F. Removal and Replacement of Heat Shield on FH-SSB(-HD) .................................... 37
G. Removal and Replacement of Door Gasket ............................................................... 37

Summary of Contents for TempGuard FH1-SSB

Page 1: ...Hoshizaki A Superior Degree of Reliability www hoshizaki com Models TempGuard Commercial Refrigerators Freezers Hoshizaki America Inc Number 73077 Issued 3 8 1999 Revised 2 21 2007 SERVICE MANUAL ...

Page 2: ... 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 Service 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com Web Site www hoshizak...

Page 3: ...except freezer side of RFH1 SSB HD auxiliary code P6 and later 15 4 Freezer Side of RFH1 SSB HD 17 B Display Board 19 C Control Board 20 1 Location 20 2 Control Board Layout 21 D Settings and Diagnostics 22 1 Guarded Access Menu 22 a Temperature Setpoint 22 b Defrost Frequency 22 c Temperature Display Scale F or C 23 2 Diagnostics Menu 24 E Alarm Signals and Countermeasures 25 F Compressor Protect...

Page 4: ...er 47 D1 RH1 SSB GD auxiliary code N6 and earlier 48 D2 RH1 SSB GD auxiliary code P5 and later 49 E1 RH2 SSB GD auxiliary code N6 and earlier 50 E2 RH2 SSB GD auxiliary code P5 and later 51 F1 RH3 SSB GD auxiliary code K0 52 F2 RH3 SSB GD auxiliary code N6 and later 53 G1 FH1 SSB HD auxiliary code P5 and earlier 54 G2 FH1 SSB HD auxiliary code P6 and later 55 H1 FH2 SSB HD auxiliary code P5 and ea...

Page 5: ...15 5 450 250 31 4 OZ RIR2 SSB51 02 115 60 1 11 0 450 200 18 2 OZ PTR1SSB xxxx PTR1 SSB01 10 115 60 1 12 0 450 250 15 5 OZ Design Pressure PSIG Refrigerant AC Supply Voltage Amperes Refrigerator Freezer R 404A HI LO HI LO Refrigerator Freezer RFH2 SSB RFH2 SSB HD 115 60 1 19 450 200 450 250 12 2 OZ 15 2 OZ RFH3 SSB RFH3 SSB HD 115 60 1 22 450 200 450 250 18 2 OZ 15 2 OZ RFH1 SSB HD 115 60 1 16 0 45...

Page 6: ...r RFH2 SSB 554 8 21 8 1507 59 3 22 3 22 3 11 5 11 5 RFH2 SSB HD 554 8 21 8 681 7 26 8 22 3 22 3 11 5 11 5 RFH3 SSB 554 8 21 8 1507 59 3 48 3 22 3 25 3 11 5 RFH3 SSB HD 554 8 21 8 681 7 26 8 48 3 22 3 25 3 11 5 RFH1 SSB HD 554 8 21 8 681 7 26 8 9 1 10 5 11 5 total Depth with Doors Open Door Opening Total Refrigerated Volume ft3 Total Shelf Space ft2 Width mm in Height mm in PTR1SSB FSFS 2 177 85 9 ...

Page 7: ... 2 RH1 SSB HD FH1 SSB HD RFH1 SSB HD RH1 SSB GD mm in ...

Page 8: ... 3 RH2 SSB HD FH2 SSB HD RFH2 SSB HD RH2 SSB GD mm in ...

Page 9: ... 4 RH3 SSB HD FH3 SSB HD RFH3 SSB HD RH3 SSB GD mm in ...

Page 10: ...10 5 PTR1SSB xxxx PTR1 SSB01 10 mm in ...

Page 11: ...ressor off Note Condenser fan and evaporator fan are on Evaporator temperature reaches 40 F defrost terminated 1 Compressor on 2 Condenser fan on Normal cycling continues Note The start circuit of the compressor is timed such that at power up and during any compressor off time there will be at least a 2 1 2 minute delay before the compressor will start The only exception is when the overload activ...

Page 12: ...12 b Timing Chart For refrigerator and refrigerator side of Dual Temp models ...

Page 13: ...elay 1 Compressor start up 2 Condenser fan start up 3 Evaporator fan start up POWER ON Board Self Check Display reads r_ is board revision Frame heaters on Cycle Off Cut out temperature reached Minimum 2 5 minutes 1 Compressor off 2 Condenser fan off 3 Evaporator fan off Defrost Start Preprogrammed time interval 1 Compressor off 2 Evaporator fan off 3 Condenser fan off 4 Defrost heater on 5 dEF di...

Page 14: ...14 b Timing Chart For freezer except freezer side of RFH1 SSB HD auxiliary code P5 and earlier ...

Page 15: ...on 2 5 minute delay 1 Compressor start up 2 Condenser fan start up Cycle Off Cut out temperature reached Minimum 2 5 minutes 1 Compressor off 2 Condenser fan off Cycle On Cut on temperature reached Minimum 2 5 minutes 1 Compressor on 2 Condenser fan on Defrost Start Preprogrammed time interval 1 Compressor off 2 Evaporator fan off 3 Condenser fan off 4 Defrost heater on 5 dEF displayed Defrost End...

Page 16: ...16 b Timing Chart For freezer except freezer side of RFH1 SSB HD auxiliary code P6 and later ...

Page 17: ...ndenser fan start up 3 Evaporator fan start up Cycle Off Cut out temperature reached Minimum 2 5 minutes 1 Compressor off 2 Condenser fan off Cycle On Cut on temperature reached Minimum 2 5 minutes 1 Compressor on 2 Condenser fan on Defrost Start Preprogrammed time interval 1 Compressor off 2 Evaporator fan off 3 Condenser fan off 4 Defrost heater on 5 dEF displayed Defrost End Defrost thermistor ...

Page 18: ...18 b Timing Chart For freezer side of RFH1 SSB HD ...

Page 19: ... top of the door and the front panel From this area information regarding the functioning of the unit can be obtained When the unit is turned on the first display reads r_ where indicates the board revision level From the display board various electronic controls and functions can also be adjusted See D Settings and Diagnostics ...

Page 20: ...evices or parts on the board in the field Always replace the whole board assembly if it goes bad 5 Do not short out power supply to test for voltage 6 Keep the thermistors clogged filter leads door switch leads pressure switch leads and ribbon cable at least 1 1 2 away from high voltage leads AC 100 volts or more to protect against electrical noise 1 Location The control box the control panel and ...

Page 21: ...ght is off when the evaporator fan is receiving power and on when the evaporator fan is not receiving power from the board Evercheck Control Board K9 red K1 white K5 black K4 red grey cabinet K3 white orange defrost Alarm Reset Button Output Test Button K6 white K2 white Transformer K8 Communication Cable Dual Temp only K7 Display Cable Dip Switch Thermistors X3 X2 X1 X4 X5 X5 Relay Condenser Fan ...

Page 22: ...e menu and no button is pressed in 15 seconds the display will return to normal and the setpoint will remain unchanged b Defrost Frequency 1a Defrost for Refrigerators Control Board Revision 22 and earlier This unit uses an off cycle defrost When a sensor in the evaporator coil reaches 13 F 10 C 8 F 13 3 C for Pass Thru the unit enters defrost When the sensor reaches 40 F 4 4 C the unit ends defro...

Page 23: ...u and the unit returns to the normal display mode If you do not cycle through the menu and no button is pressed in 15 seconds the display will return to normal and the defrost frequency will remain unchanged Note The change in the defrost setting will take effect after the next defrost based on the previous setting If it is desired that this change in interval timing take effect immediately turn t...

Page 24: ... hours total run time in the last 24 hours Value is every 24 hours 5 50 Right two digits represent compressor on time percentage for the last 5 run cycles A run cycle begins when the compressor switches from off to on and ends the next time it switches from off to on See diagram below Example 50 run time over the last 5 run cycles Value is calculated as follows Percent on time On time last 5 cycle...

Page 25: ... alternate with dEF instead of temperature 5 beeps every ten seconds Defrost Alarm Defrost has taken longer than 1 hour Control board has terminated defrost Press RESET Alarm will stop and E3 will clear If 4 consecutive defrosts take more than 1 hour a qualified service technician must be called For the service tech to reset this alarm press ALARM RESET on the control board itself E4 6 beeps every...

Page 26: ... Both Display and Beeps Door open longer than 3 minutes Close door During alarm press RESET to silence buzzer for 3 minutes Note Moving the diagnostic menu item 3 to ON resets all alarms regardless of whether or not the setpoints are reached This is a complete clearing of all alarms See II D 2 Diagnostics Menu for details F Compressor Protector When a combined temperature amperage value is above t...

Page 27: ...ntrol Board 1 Defective 1 Replace control board j Compressor Overload 1 Defective Contacts open 1 Replace k Compressor 1 Open windings 1 Check continuity and replace l Relay Condensing Unit 1 Bad contacts 1 Replace 2 Open coil winding 2 Check and replace 2 Compressor will not run draws current and trips on overload a Voltage 1 Too low 1 Call electrician b Start Relay 1 Bad contacts 1 Replace 2 Ope...

Page 28: ...Thermistor 1 Defective 1 Check and replace i Control Board 1 Defective 1 Replace 6 Cabinet temperature display indicator does not illuminate properly a Board Connection 1 Bad connection between control board and display board 1 Check connection b Display Board 1 Defective 1 Replace c Control Board 1 Defective 1 Replace 7 Cabinet inside temperature too low a Thermistor 1 Defective 1 Check and repla...

Page 29: ...ssing control board ALARM RESET 10 Condensate water overflow a Cabinet Contents 1 Loading of large volumes of warm moist uncovered product 1 Cover product with plastic wrap b Location of Unit 1 Unit located near high humidity source such as fryer steamer etc 1 Relocate c Seals 1 Poor sealing around evaporator door gaskets 1 Adjust or replace d Environment 1 Extreme environment and door opening con...

Page 30: ... Temperature Resistance kΩ F C 0 17 8 13 69 10 12 2 10 48 32 0 0 6 00 50 10 0 3 96 70 21 1 2 57 90 32 2 1 71 To check a thermistor for resistance follow the steps below 1 Turn power off and disconnect connectors K3 and K4 on the board 2 Remove the thermistor 3 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes 4 Check for a resistance between thermistor le...

Page 31: ... using an electronic leak detector 1 Refrigerant Recovery The unit is provided with refrigerant access valves Using proper refrigerant practices recover the refrigerant from the access valves and store it in an approved container Do not discharge the refrigerant into the atmosphere 2 Brazing WARNING 1 Refrigerant R 404A itself is not flammable at atmospheric pressure and temperatures up to 176 F 8...

Page 32: ...uge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump Never allow the oil in the vacuum pump to flow backward 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the low side valve and high side valve on the service manifold 5 Disconnect the vacuum pump and attach a refriger...

Page 33: ... 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the terminal cover on the compressor and disconnect the compressor wiring 5 Remove the hold down bolts washers rubber grommets and sleeves 6 Remove the discharge and suction pipes 7 Remove the compressor Unpack the new compressor package 8 Attach the rubber grommets of the prior compressor 9 Place the com...

Page 34: ...the expansion valve Place the new expansion valve in position 6 Remove the drier then place the new drier in position 7 Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 250 F 121 C 8 Check for leaks using nitrogen gas 14...

Page 35: ...frigerant and store it in an approved container 4 Remove the insulation tubing and disconnect the evaporator inlet and outlet tubing Elevate evaporator to avoid overheating of evaporator housing 5 Place the new evaporator in position 6 Remove the drier then place the new drier in position 7 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 8 Evacuate the system and charge it with refrig...

Page 36: ...ded Solution Order HS 3541 that contains a motor Shinko brackets blade and all fasteners required for mounting to the shroud using the existing threaded holes For details see the unit s parts list b Unit s evaporator shroud has four threaded holes and a Jakel motor Solution Order a new motor Shinko brackets fan blade and the appropriate fasteners listed in the unit s parts list Attach the brackets...

Page 37: ...nlet and outlet tubes as shown in the illustration Note All clips are shown in the illustration in the correct orientation for installation Slide the parts onto the evaporator brackets using the tabs on the support clips G Removal and Replacement of Door Gasket Remove old gasket by pulling it directly out of the vinyl gasket retainer Thoroughly clean the gasket area with mild soap and water prior ...

Page 38: ...tridge 7 Replace the spring with one of the same color Be certain that the spring ends are engaged in both the spring cartridge and the top of spring guide pin 8 Repeat steps 1 through 7 for additional doors as necessary 9 Reverse procedure to reassemble door s to cabinet Note Tighten spring guide pin one complete rotation to set proper spring tension Bushing Cover Hinge Stop Pin Pivot Pin Hinge W...

Page 39: ...shown in the diagram below 7 Rev 11 or lower control boards will work only with the round light switches 4A0487 01 These switches are on front of the cabinet behind the doors 8 Rev 12 and higher will work on both round and square door switches For round switches dip switch 3 must be flipped on For square switches leave the dip switch off 9 Verify dip switches are set correctly See the unit s wirin...

Page 40: ...wall J Door Re Hinging except glass doors The door on any unit is reversible as shown below The instructions for re hinging are provided in the kits listed below Convert Door Type Kit Number Right to Left Full HS 3527 Left to Right Full HS 3528 Right to Left Half HS 3529 Left to Right Half HS 3530 ...

Page 41: ...r to remove dirt and grease 4 Air Filter Check the filter at least once a month If it is dirty use warm water and a neutral cleaner to wash the filter See II E 10 Clogged Filter Alarm The filter is located behind the upper front panel This filter can be removed by bending the condenser filter bracket back sliding the filter up and out and allowing the bracket spring back into place 5 Condenser Che...

Page 42: ...nfirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Cut out closed 500 10 PSIG Cut in open 330 10 PSIG VI Wiring Diagrams A1 RH1 SSB HD auxiliary code L5 and earlier ...

Page 43: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG A2 RH1 SSB HD auxiliary code M5 and later ...

Page 44: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Cut out closed 450 10 PSIG Cut in open 320 10 PSIG B1 RH2 SSB HD auxiliary code L5 and earlier ...

Page 45: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG B2 RH2 SSB HD auxiliary code M5 and later ...

Page 46: ... the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Aux code H0 J0 Aux code J1 to L5 Cut out closed 450 10 PSIG 500 10 PSIG Cut in open 320 10 PSIG 330 10 PSIG C1 RH3 SSB HD auxiliary code L5 and earlier ...

Page 47: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG C2 RH3 SSB HD auxiliary code M5 and later ...

Page 48: ... diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Cut out closed 450 10 PSIG Cut in open 320 10 PSIG Note High pressure switch changed at auxiliary code N6 to normally closed See D2 for details D1 RH1 SSB GD auxiliary code N6 and earlier ...

Page 49: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG D2 RH1 SSB GD auxiliary code P5 and later ...

Page 50: ... diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Cut out closed 500 10 PSIG Cut in open 330 10 PSIG Note High pressure switch changed at auxiliary code M5 to normally closed See E2 for details E1 RH2 SSB GD auxiliary code N6 and earlier ...

Page 51: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG E2 RH2 SSB GD auxiliary code P5 and later ...

Page 52: ...cing the unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Cut out closed 400 10 PSIG Cut in open 270 10 PSIG F1 RH3 SSB GD auxiliary code K0 ...

Page 53: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG F2 RH3 SSB GD auxiliary code N6 and later ...

Page 54: ... diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally open Cut out closed 500 10 PSIG Cut in open 330 10 PSIG Note High pressure switch changed at auxiliary code M6 to normally closed See G2 for details G1 FH1 SSB HD auxiliary code P5 and earlier ...

Page 55: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG G2 FH1 SSB HD auxiliary code P6 and later ...

Page 56: ...t the diagram located on the evaporator case cover Pressure Switch normally open Aux code H0 J0 Aux code J1 J2 Cut out closed 450 10 PSIG 500 10 PSIG Cut in open 320 10 PSIG 330 10 PSIG Note High pressure switch changed at auxiliary code L5 to normally closed See H2 for details H1 FH2 SSB HD auxiliary code P5 and earlier ...

Page 57: ...he unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG H2 FH2 SSB HD auxiliary code P6 and later ...

Page 58: ...d or servicing the unit confirm that you have the proper wiring diagram by checking against the diagram located on the top front cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG I RFH1 SSB HD 1 Refrigerator ...

Page 59: ...nit confirm that you have the proper wiring diagram by checking against the diagram located on the top front cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG I RFH1 SSB HD 2a Freezer auxiliary code P5 and earlier ...

Page 60: ... unit confirm that you have the proper wiring diagram by checking against the diagram located on the top front cover Pressure Switch normally open Cut out open 490 10 PSIG Cut in closed 370 20 PSIG I RFH1 SSB HD 2b Freezer auxiliary code Q5 and later ...

Page 61: ... HD See diagram for RH2 SSB HD See diagram for FH1 SSB HD CAUTION Before diagnosing and or servicing the unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover J RFH2 SSB HD K RFH3 SSB HD ...

Page 62: ...r servicing the unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG L RIR2 SSB51 02 ...

Page 63: ...cing the unit confirm that you have the proper wiring diagram by checking against the diagram located on the evaporator case cover Pressure Switch normally closed Cut out open 490 10 PSIG Cut in closed 370 20 PSIG M PTR1SSB xxxx PTR1 SSB01 10 ...

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