Hoshizaki SSB Service Manual
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Hoshizaki SSB Service Manual

Hoshizaki SSB Service Manual

Ssb series professional and tempguard series refrigerated kitchen equipment
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Professional and TempGuard Series
Refrigerated Kitchen Equipment
Models
SSB
SERVICE MANUAL
Number: 73077
Issued: 3-8-1999
Revised: 5-22-2012

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Summary of Contents for Hoshizaki SSB

  • Page 1 Hoshizaki Hoshizaki America, Inc. Professional and TempGuard Series Refrigerated Kitchen Equipment Models SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com Number: 73077 Issued: 3-8-1999 Revised: 5-22-2012...
  • Page 2 Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, send an e-mail message, or write to the Hoshizaki Technical Support Department for assistance. Phone: 1-800-233-1940; (770) 487-2331 Fax: 1-800-843-1056;...

  • Page 3: Table Of Contents

    6. Roll Thru ........................ 15 B. Sequence of Operation ....................16 1. Sequence Cycles and Shutdown ................16 a) Refrigerator and RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator ......16 b) Freezer and RFH1-SSB(-HD)(-HS)(-HSE) Freezer .......... 18 2. Sequence Flow Chart .................... 23 a) Refrigerator ...................... 23 b) Freezer ......................
  • Page 4 A. Diagnostic Procedure ....................38 1. Refrigerator and RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator ........39 2a. Freezer (auxiliary code P-5 and earlier) and RFH1-SSB(-HS)(-HSE) Freezer ... 43 2b. Freezer (auxiliary code P-6 and later) and RFH1-SSB-HD Freezer ..... 47 B. Control Board Check ....................52 C.
  • Page 5 VII. Wiring Diagrams ......................67 A1. RH1-SSB(-HD) (auxiliary code L-5 and earlier) ............67 A2. RH1-SSB(-HD)(-CF) (auxiliary code M-5 and later) ..........68 B1. RH2-SSB(-HD) (auxiliary code L-5 and earlier) ............69 B2. RH2-SSB(-HD) (auxiliary code M-5 and later) ............70 C1.

  • Page 6: Important Safety Information

    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 appliance or damage to property. WARNING Indicates a hazardous situation which could result in death or serious injury.
  • Page 7 WARNING, continued • THIS APPLIANCE MUST BE GROUNDED. This appliance is equipped with a NEMA 5-15 three-prong grounding plug to reduce the risk of potential shock hazards. It must be plugged into a properly grounded, independent 3-prong wall outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have a qualified electrician replace it with a properly grounded, independent 3-prong wall outlet.
  • Page 8 WARNING, continued • Open and close the doors with care. Doors opened too quickly or forcefully may cause injury or damage to the appliance or surrounding equipment. • Do not use combustible spray or place volatile or flammable substances near the appliance. They might catch fire. • Keep the area around the appliance clean. Dirt, dust, or insects in the appliance could cause harm to individuals or damage to the appliance. • Do not tightly pack the cabinet. Allow some space between items to ensure good air flow. Also allow space between items and interior surfaces. • Do not throw anything onto the shelves or load any single shelf with more than 120 lb. (54.5 kg) of product. They might fall off and cause injury. • This appliance is designed only for temporary storage of food. Employ sanitary methods.

  • Page 9: Specifications

    Supply Model Voltage Amperes Ref. Freezer Ref. RFH1-SSB-HD 115/60/1 16.0 9.5 oz. 12.0 oz. RFH1-SSB(-HS)(-HSE) 115/60/1 12.1 oz. 9.1 oz. RFH2-SSB(-HD) 115/60/1 16.6 12.2 oz. 15.2 oz. RFH3-SSB(-HD) 115/60/1 18.2 oz. 15.2 oz. See the nameplate for electrical and refrigeration specifications. The nameplate is located on the right side wall of the cabinet interior.

  • Page 10: General Information

    Control Box Cover Thermostatic Expansion Valve Defrost Thermistor Front Panel Evaporator Fan Motor Display Board Cabinet Thermistor Door Power Switch Control Board Control Box Light Switch (glass door model) Door Switch Door Lock Door Latch Door Gasket Model Shown: RH1-SSB-FG...

  • Page 11: Two Section

    Condenser Fan Motor Condenser Thermostatic Compressor Condenser Air Filter Expansion Valve Display Board Defrost Evaporator Thermistor Fan Motor Evaporator Front Panel Cabinet Thermistor Door Switch Door Power Switch Control Board Control Box Perimeter Heater Switch Door Lock Door Gasket Model Shown: RH2-SSB...

  • Page 12: Three Section

    Fan Motor Condenser Defrost Thermistor Evaporator Condenser Air Filter Display Board Cabinet Thermistor Control Box Cover Light Switch (glass door model) Front Panel Power Switch Door Switch Control Board Control Box Door Lock Door Handle Door Gasket Door Model Shown: RH3-SSB-FG...

  • Page 13: Pass Thru

    4. Pass Thru Perimeter Heater Switch Top Cover Evaporator Case Cover Condenser Fan Motor Thermostatic Compressor Condenser Air Filter Condenser Expansion Valve Defrost Thermistor Cabinet Thermistor Control Box Cover Evaporator Front Panel Fan Motor Evaporator Power Switch Door Switch Control Board Display Board Control Box Door...

  • Page 14: Roll-In

    Condenser Air Filter Display Board Evaporator Fan Motor Control Box Cover Cabinet Thermistor Front Panel Power Switch Control Board Control Box Perimeter Heater Door Switch Switch Door Lock 3-Sided Door Gasket Door Rack Sweep Guide Ramp Gasket Model Shown: RIR1-SSB...

  • Page 15: Roll Thru

    Evaporator Condenser Fan Motor Condenser Display Board Condenser Air Filter Control Box Cover Evaporator Fan Motor Rear Panel Power Switch Control Board Control Box Rack Guide Perimeter Heater Switch Door Lock Door Switch Door Gasket Door Ramp Model Shown: RTR1-SSB...

  • Page 16: Sequence Of Operation

    (r ##) appears on DB. Note: There is a minimum 2.5-minute Comp on time and 2.5-minute Comp off time. RFH1-SSB(-HS)(-HSE): Power is supplied to CPM as soon as the power switch is placed in the "ON" position. F/S controls CPM operation. a) Refrigerator and RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator 1) Startup No Component LEDs are on.
  • Page 17 C). EvapFM and ConFM continue. 2.5 minute Comp ° ° delay timer terminates. Comp energizes. 2) RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator–LEDs 4 (Comp and ConFM) and 5 (unused) are on. LED 3 (EvapFM on) is off: DTh warms to 40 F (4 ° °...

  • Page 18: B) Freezer And Rfh1-Ssb(-Hd)(-Hs)(-Hse) Freezer

    2.5-minute Comp delay timer terminates. Comp, ConFM, EvapFM, DrH, PH, and MH energize. 2.5 min. Comp minimum run timer starts. 3a) Cool Down Achieved: Freezer (auxiliary code P-5 and earlier) and RFH1-SSB(-HS) (-HSE) Freezer LED 3 (EvapFM off) is on: CB monitors cooling of the cabinet via CTh. CTh cools to F (1.7...
  • Page 19 ° ° terminates. Comp, ConFM, EvapFM, DrH, PH and MH energize. 5a) Defrost: Freezer (auxiliary code P-5 and earlier) and RFH1-SSB(-HS)(-HSE) Freezer (1) Time-Initiated Defrost or Manual-Initiated Defrost a1) Freezer (auxiliary code P-5 and earlier)–LEDs 1 (DH) and 3 (EvapFM off) are on: DT terminates or manual defrost initiated. 20-minute minimum defrost timer starts.
  • Page 20 DH de-energizes. 5-minutes later, Comp and ConFM energize. a2) RFH1-SSB(-HS)(-HSE) Freezer–LEDs 4 (Comp and ConFM) and 5 (DrH, PH, and MH) are on: DTh warms to 100°F (38°C) or 1-hour defrost timer terminates. DH de-energizes. 5-minutes later, Comp, ConFM, DrH, PH, and MH energize.
  • Page 21 LED 3 (EvapFM on) is off: DTh cools to 70°F (21°C) or lower, EvapFM energizes. a2) RFH1-SSB-HD Freezer–LEDs 4 (Comp and ConFM) and 5 (CPH and DrH (auxiliary code Q-5 and later)) are on. LED 3 (EvapFM on) is off: DTh cools...
  • Page 22 LED 3 (EvapFM on) is off: When CTh reads 15°F (8.3°C) above setpoint or less, cabinet temperature is displayed on DB. Defrost is complete. 1b) FH1-SSB-HD Freezer–LEDs 4 (Comp and ConFM) and 5 (CPH and DrH (auxiliary code Q-5 and later)) are on. LED 3 (EvapFM on) is off: When CTh reads 15°F (8.3°C) above setpoint or less, cabinet temperature is...

  • Page 23: Sequence Flow Chart

    Comp de-energized EvapFM energized ConFM de-energized Note: • 2.5-minute minimum compressor on and off time. • Evaporator fan motor de-energizes when door is open. • 20-minute minimum defrost time. • Perimeter heater controlled by perimeter heater switch. Legend: Comp-compressor • Glass door (-GD models) heater controlled by glass door heater switch. ConFM-condenser fan motor • RFH1-SSB(-HS)(-HSE): Condensate pump motor has CTh-cabinet thermistor DTh-defrost thermistor power supply as soon as the power switch is placed in the "ON" position. Condensate pump motor energizes as EvapFM-evaporator fan motor needed via the float switch.

  • Page 24: B) Freezer

    ConFM-condenser fan motor • 20-minute minimum defrost time. CTh-cabinet thermistor • 1-hour maximum defrost time. DB-display board • Perimeter heater controlled by perimeter heater switch DH-defrost heater (except RFH1-SSB(-HS)(-HSE)). DTh-defrost thermistor • Glass door (-GD models) heater controlled by glass door EvapFM-evaporator fan motor heater switch. • RFH1-SSB(-HS)(-HSE): Perimeter heater and mullion heater are controlled through the control board and turn on and off with compressor when S3 dip switch 8 is in the off position.

  • Page 25: Display Board

    C. Display Board 1. Location When the power switch is moved to the "ON" position, the control board revision appears on the display board. "r ##" indicates the control board revision level (e.g., r 23). Afterward, the cabinet temperature is displayed. The display board also allows for access to the guarded access menu and service menu. From the guarded access menu, the cabinet setpoint, defrost frequency, and temperature display scale can be adjusted. For further details, see "II.E.1. Guarded Access Menu." From the service menu, information regarding appliance functions can be obtained. For further details, see "II.E.2. Service Menu."...

  • Page 26: Control Board

    D. Control Board • A Hoshizaki exclusive control board is employed in Hoshizaki Professional and TempGuard Series refrigerators and freezers. • All models are pretested and factory-adjusted • For a control board check procedure, see "III.B. Control Board Check." NOTICE • The control board is fragile; handle very carefully. • The control board contains integrated circuits, which are susceptible to failure due to static discharge. It is especially important to touch the metal part of the appliance before handling or replacing the control board. • Do not touch the electronic devices on the control board or the back of the control board. • Do not change wiring and connections. Do not misconnect terminals.

  • Page 27: Control Board Layout

    2. Control Board Layout 5 0 / 0 2 / 2 1 2 1 0 0 8 8 2 3 : # G w D : E T A D V E R D L 3 2 - 2 6 8 2 A 2 - S O H , A C P : E L T I T : V E R B C P 5 0 / 0 2 / 2 1...

  • Page 28: Controls And Adjustments

    40°F (4°C) the appliance ends defrost. The cabinet temperature is not displayed during defrost, "dEF" is displayed in its place. This revision also feature an adjustable time-initiated defrost along with the normal temperature-initiated defrost. The time-initiated defrost is factory set at 0. Before changing this setting, contact the Hoshizaki Technical Support Department for recommendations. To change the time-initiated defrost, follow the steps in "(3) Defrost Frequency Adjustment" later in this section.

  • Page 29: C) Temperature Display Scale (°F Or °C)

    This appliance uses a time-initiated heated defrost. It is preset at the factory to defrost 6 times per day for general conditions. However, if it is determined that this interval does not suit conditions, the interval can be changed. To change, see "(3) Defrost Frequency Adjustment" below. Contact the Hoshizaki Technical Support Department for recommendations. Note that since the defrost is heated, it will have a tendency to raise cabinet temperature. Defrost termination temperature is 100°F (38°C).

  • Page 30: Service Menu

    2. Service Menu From the service menu, information regarding the functioning of the appliance can be obtained. To access the service menu, press and hold the up and down buttons and the "ENTER" button simultaneously for 3 seconds. Scroll through the service menu list using the "ENTER" button. Change options using the up/down arrows. To exit, press the "ENTER" button until normal display mode returns. To exit the service menu at any point, press and hold the "ENTER" button for 3 seconds or the service menu display remains on the display board for 10 minutes after the last keystroke, then automatically reverts to normal operation (cabinet temperature display).

  • Page 31: Led Lights And Alarm Safeties Chart

    3. LED Lights and Alarm Safeties Chart If an error occurs, the alarm code and cabinet temperature are displayed in 2-second intervals and an alarm sounds. See the table below for a description of the problem. Alarm Signals Alarm Alarm Code Sound Problem Reset Options...
  • Page 32 Alarm Signals Alarm Alarm Code Sound Problem Reset Options Cabinet Thermistor Malfunction Alarm Cabinet thermistor disconnected, shorted or open. Check connection and continuity. Cabinet thermistor has failed. Reconnect or replace as needed. After replacing cabinet thermistor, alarm resets. During alarm, press "RESET" to silence Constant buzzer buzzer for 5 minutes.

  • Page 33: Default Dip Switch Settings

    OFF OFF OFF OFF OFF ON OFF ON RFH1-SSB(-HS)(-HSE) Freezer OFF OFF OFF OFF OFF ON OFF OFF RFH2-SSB(-HD) Freezer Aux. Code P-5 and Earlier OFF OFF OFF OFF OFF ON OFF OFF RFH2-SSB(-HD) Freezer Aux. Code P-6 and Later OFF OFF OFF OFF OFF ON ON OFF RFH3-SSB(-HD) Freezer Aux.

  • Page 34: A) Appliance Operation (Freezer/Refrigerator) (S3 Dip Switch 1)

    Heated Glass Door (-GD models) c) Door Switch Type (S3 dip switch 3) Hoshizaki has utilized both normally open and normally closed door switch contact styles. S3 dip switch 3 is used to select the type of switch used on a particular model.

  • Page 35: E) Display Board Operation (S3 Dip Switch 5)

    e) Display Board Operation (S3 dip switch 5) The display board may be disabled by moving S3 dip switch 5 to the "ON" position. When the display board is disabled, the control board operates in default mode. Default Mode: Compressor on 5-minutes, then off 5-minutes. Factory set, no adjustment required. S3 Dip Switch Setting Display Board Status No.

  • Page 36: H) Dual Temp Freezer Component Control (S3 Dip Switch 8)

    Condensate Pan Heater and Drain Heater (aux. code Q-5 and later) RFH1-SSB(-HS)(-HSE) Freezer Drain Heater, Perimeter Heater, and Mullion Heater RFH2-SSB(-HD) and RFH3-SSB(-HD) Condenser Fan Motor S3 Dip Switch Setting Dual Temp Freezer Component Control No. 8 LED 5 (X5 relay) on All CB K9 pin #2 components cycle on and off with compressor.

  • Page 37: Compressor Protector, Short Cycle Protection, And High-Pressure Switch

    Note: Time may vary with compressor protector or high-pressure switch activation. 3. High-Pressure Switch If pressure on the high-side of the appliance exceeds Hoshizaki specifications, the high-pressure switch activates and interrupts the compressor circuit, de-energizing the compressor until the pressure returns to an acceptable level. For further details, see "III. Service Diagnosis".

  • Page 38: Service Diagnosis

    III. Service Diagnosis WARNING • This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Risk of electric shock. Use extreme caution and exercise safe electrical practices. • Moving parts (e.g., fan blade) can crush and cut. Keep hands clear. • Make sure all food zones are clean after the appliance is serviced. For cleaning procedures, see "V.A. Cleaning Instructions." A. Diagnostic Procedure The diagnostic procedure is basically a sequence check that allows you to diagnose the electrical system and components. Before proceeding, check for correct installation, proper voltage per appliance nameplate.

  • Page 39: Refrigerator And Rfh1-Ssb(-Hd)(-Hs)(-Hse) Refrigerator

    2.5 minute Comp delay timer terminates. Comp and ConFM energize. 2.5 min. Comp minimum run timer starts. 8b) Cool Down–RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator: LEDs 4 (Comp and ConFM) and 5 (unused) are on: EvapFM continues. 2.5 minute Comp delay timer terminates. Comp and ConFM energize. 2.5 min. Comp minimum run timer starts.
  • Page 40 ConFM Diagnosis: RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator: If ConFM does not energize, check for 115VAC at CB K1 connector pin #10 (GY wire) to a neutral (W wire). If 115VAC is not present, replace CB. If 115VAC is present, check for 115VAC at Comp relay black (BK  wire) and red (R wire) to a neutral (W wire). If 115VAC is not present on the black (BK wire), check wiring connections.
  • Page 41 (BR wire) to a neutral (W wire). If 115VAC is not present, replace CB. If 115VAC is present, check that ConFM blade is not binding and ConFM continuity is good. c2) ConFM Diagnosis: RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator: Check for 115VAC at K1 connector pin #10 (GY wire) to a neutral (W wire). If 115VAC is present, replace CB.
  • Page 42 ConFM Diagnosis: RFH1-SSB(-HD)(-HS)(-HSE) Refrigerator: If ConFM does not energize, check for 115VAC at CB K1 connector pin #10 (GY wire) to a neutral (W wire). If 115VAC is not present, replace CB. If 115VAC is present, check for 115VAC at Comp relay black (BK wire) and red (R wire) to a neutral (W wire). If 115VAC is not present on the black (BK wire), check wiring connections.

  • Page 43: 2A. Freezer (Auxiliary Code P-5 And Earlier) And Rfh1-Ssb(-Hs)(-Hse) Freezer

    2a. Freezer (auxiliary code P-5 and earlier) and RFH1-SSB(-HS)(-HSE) Freezer 7) Startup–LED 3 (EvapFM off) is on: 2.5 min. Comp delay timer starts. Cabinet temperature appears on DB. 8a) Cool Down–Freezer (auxiliary code P-5 and earlier): LEDs 4 (Comp) and 5 (ConFM) are on. LED 3 (EvapFM on) is off: 2.5 min. Comp delay timer terminates.
  • Page 44 DrH, PH, and MH Diagnosis: RFH1-SSB(-HS)(-HSE) Freezer: If heaters do not energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral (W wire). If 115VAC is not present, replace CB. If 115VAC is present, check PH/MH switch.
  • Page 45 CB K1 connector pin #3 (DBU wire) to a neutral (W wire). If 115VAC is present, replace CB. f) DrH, PH, and MH Diagnosis: RFH1-SSB(-HS)(-HSE) Freezer: If heaters do not de-energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral (W wire). If 115VAC is present, replace CB.
  • Page 46 Comp relay. Next, check that the fan blade is not binding and that ConFM continuity is good. e) DrH, PH, and MH Diagnosis: RFH1-SSB(-HS)(-HSE) Freezer: If heaters do not energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral (W wire).

  • Page 47: 2B. Freezer (Auxiliary Code P-6 And Later) And Rfh1-Ssb-Hd Freezer

    If 115VAC is not present, replace CB. If 115VAC is present, check EvapFM blade for binding and EvapFM continuity. 8a) Cool Down–Freezer: LEDs 4 (Comp) and 5 (ConFM) are on (except RFH1-SSB-HD). LED 3 (EvapFM on) is off: 2.5 min. Comp delay timer terminates. EvapFM continues.
  • Page 48 If 115VAC is not present, check continuity of Comp relay contacts. If closed, replace Comp relay. c) CPH and DrH Diagnosis: RFH1-SSB-HD Freezer: If heaters do not energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral (W wire). If 115VAC is...
  • Page 49 3 (EvapFM off) are on: DT terminates or manual defrost initiated. DH, DrH, DctH, and CordH energize. "dEF" displayed on DB. If energized, Comp, ConFM, and EvapFM de-energize. 1b) RFH1-SSB-HD Freezer–LEDs 1 (DH), 3 (EvapFM off), and 5 (CPH and DrH (auxiliary code Q-5 and later)) are on: DT terminates or manual defrost initiated. CPH and DrH (auxiliary code Q-5 and later) continue. DH energizes. "dEF"...
  • Page 50 (W wire). If 115VAC is not present, replace CB. Next, check that the fan blade is not binding and that ConFM continuity is good. b2) ConFM Diagnosis: RFH1-SSB-HD Freezer: If ConFM does not energize, check for 115VAC at CB K1 connector pin #10 (GY wire) to a neutral (W wire). If 115VAC is not present, replace CB.
  • Page 51 LED 3 (EvapFM on) is off: DTh cools to 70°F (21°C) or lower, EvapFM energizes. 1b) RFH1-SSB-HD Freezer–LEDs 4 (Comp and ConFM) and 5 (CPH and DrH (auxiliary code Q-5 and later)) are on. LED 3 (EvapFM on) is off: DTh cools to 70°F (21°C) or lower, EvapFM energizes.

  • Page 52: Control Board Check

    B. Control Board Check Before replacing a CB that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. Always choose a neutral (W wire) to establish a good neutral connection when checking high voltages.

  • Page 53: Thermistor Check

    C. Thermistor Check In the event the cabinet thermistor reading is out of range, the compressor operates on a fixed time basis of 5-minutes on and 5-minutes off. In the event the defrost (evaporator) thermistor reading is out of range, defrost initiation occurs every 6 hours and terminates based on cabinet thermistor temperature.

  • Page 54: Clogged Filter Thermostat And High-Pressure Switch

    D. Clogged Filter Thermostat and High-Pressure Switch Confirm the air filter is clean and ConFM is energized and fan blade turns freely. Check that the condenser coil is not clogged or restricted. Confirm that appliance location meets factory requirements: • This appliance is not intended for outdoor use. Normal operating ambient temperature should be within 45°F to 100°F (7°C to 38°C).

  • Page 55: Diagnostic Chart

    E. Diagnostic Chart Before consulting the diagnostic charts, check the following: • Check the setpoint. For factory default settings, see "II.E.1.a) Temperature Setpoint." • Make sure the doors are not left open or opened too often and that they are sealing properly. • Make sure product is not blocking airflow or that the cabinet is not overloaded with warm or hot product. Product should be cooled before putting it in the appliance. • Check for correct installation and proper voltage per appliance nameplate. This appliance is not intended for outdoor use. Normal operating ambient temperature should be within 45°F to 100°F (7°C to 38°C).
  • Page 56 Appliance Not Cooling - Possible Cause 14. Compressor Relay a) Bad contacts. b) Open coil windings. 15. Compressor Protector a) Dirty condenser. b) Condenser fan not operating. c) Defective. 16. Start Relay a) Defective 17. Start Capacitor a) Defective. 18. Compressor a) Defective.

  • Page 57: Replacement Of Components

    IV. Replacement of Components WARNING • This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Move the power switch to the "OFF" position, then unplug the appliance from the electrical outlet before servicing. A. Service for Refrigerant Lines WARNING • Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA-certified service personnel. • Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG).

  • Page 58: Brazing

    2. Brazing WARNING • R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). • R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames), 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 (140 PSIG). Do not use 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.

  • Page 59: Important Notes For Component Replacement

    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. For the required refrigerant charge, see the nameplate. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.

  • Page 60: Removal And Replacement Of Evaporator Fan Shroud Assembly

    1. Note for RH1-SSB(-HD), RH1-SSB-GD, and Refrigerator Side of RFH2-SSB(-HD) For RH1-SSB(-HD) aux. code M5_____B and earlier, RH1-SSB-GD aux. code L0 and earlier, and refrigerator side of RFH2-SSB(-HD) aux. code M5 and earlier, there was a non-interchangeable part change. If your appliance falls into this time frame and you need to replace parts in the evaporator fan shroud assembly, review the scenarios below and follow the appropriate solution.

  • Page 61: Removal And Replacement Of Heat Shield On Fh2-Ssb(-Hd)

    D. Removal and Replacement of Heat Shield on FH2-SSB(-HD) The heat shield was added to the evaporator assembly at auxiliary code M6. To replace the shield, follow the instructions below. 1) Remove the original heat shield by lifting the evaporator up and sliding the heat shield out.

  • Page 62: Removal And Replacement Of Door Closure Spring

    E. Removal and Replacement of Door Closure Spring WARNING Wear eye protection and use caution when removing the tension screw (step 4). 1) Raise the front panel. Then, move the power switch to the "OFF" position and unplug the appliance. 2) Remove the wire cover. 3) Remove the bushing cover from the top of the spring guide pin. 4) Insert a small drift pin or long leg of an allen wrench into one of the threaded tension screw holes in the spring guide pin.

  • Page 63: Door Re-Hinging (Except Glass Doors)

    F. Door Re-Hinging (except glass doors) The door on any appliance 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...

  • Page 64: Maintenance

    V. Maintenance A. Cleaning Instructions WARNING • Before cleaning the appliance, move the power switch to the "OFF" position and unplug the appliance to prevent electric shock by unexpected entrance of water into the appliance or injury by moving parts. • Before cleaning the appliance, move all foods into another clean refrigerator or freezer. • Do not splash water directly onto the appliance. This might cause short circuit, electric shock, corrosion, or failure. • Before using a sanitizer such as inert soap and sodium hypochlorite (chlorine bleach), thoroughly read the manufacturer’s instructions on its proper usage. IMPORTANT • To prevent damage to the plastic surfaces, do not use the following: thinner, benzine, alcohol, petroleum, soap powder, polishing powder, alkaline cleaner,...

  • Page 65: Maintenance

    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 or power cord is damaged, replace it. Be sure to connect the ground wire. C.

  • Page 66: Disposal

    VI. Disposal WARNING When preparing the appliance for disposal, remove the door to reduce the risk of children getting trapped. Leave the shelves in place so that children may not easily climb inside. This appliance contains refrigerant and must be disposed of in accordance with applicable national, state, and local codes and regulations.

  • Page 67: Wiring Diagrams

    VII. Wiring Diagrams A1. RH1-SSB(-HD) (auxiliary code L-5 and earlier) NOTICE 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.

  • Page 68: A2. Rh1-Ssb(-Hd)(-Cf) (Auxiliary Code M-5 And Later)

    A2. RH1-SSB(-HD)(-CF) (auxiliary code M-5 and later) NOTICE 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.

  • Page 69: B1. Rh2-Ssb(-Hd) (Auxiliary Code L-5 And Earlier)

    B1. RH2-SSB(-HD) (auxiliary code L-5 and earlier) NOTICE 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.

  • Page 70: B2. Rh2-Ssb(-Hd) (Auxiliary Code M-5 And Later)

    B2. RH2-SSB(-HD) (auxiliary code M-5 and later) NOTICE 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.

  • Page 71: C1. Rh3-Ssb(-Hd) (Auxiliary Code L-5 And Earlier)

    C1. RH3-SSB(-HD) (auxiliary code L-5 and earlier) NOTICE 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.

  • Page 72: C2. Rh3-Ssb(-Hd) (Auxiliary Code M-5 And Later)

    C2. RH3-SSB(-HD) (auxiliary code M-5 and later) NOTICE 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.

  • Page 73: D1. Rh1-Ssb-Gd (Auxiliary Code N-6 And Earlier)

    D1. RH1-SSB-GD (auxiliary code N-6 and earlier) NOTICE 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.

  • Page 74: D2. Rh1-Ssb-Gd (Auxiliary Code P-5 And Later)

    D2. RH1-SSB-GD (auxiliary code P-5 and later) NOTICE 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.

  • Page 75: E1. Rh2-Ssb-Gd (Auxiliary Code N-6 And Earlier)

    E1. RH2-SSB-GD (auxiliary code N-6 and earlier) NOTICE 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.

  • Page 76: E2. Rh2-Ssb-Gd (Auxiliary Code P-5 And Later)

    E2. RH2-SSB-GD (auxiliary code P-5 and later) NOTICE 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.

  • Page 77: F1. Rh3-Ssb-Gd (Auxiliary Code S-5 And Earlier)

    F1. RH3-SSB-GD (auxiliary code S-5 and earlier) NOTICE 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.

  • Page 78: F2. Rh3-Ssb-Fg(-Hg) (Auxiliary Code T-5 To V-5)

    F2. RH3-SSB-FG(-HG) (auxiliary code T-5 to V-5) NOTICE 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.

  • Page 79: F3. Rh3-Ssb-Fg(-Hg) (Auxiliary Code A-5 And Later)

    F3. RH3-SSB-FG(-HG) (auxiliary code A-5 and later) NOTICE 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.

  • Page 80: G1. Fh1-Ssb(-Hd) (Auxiliary Code P-5 And Earlier)

    G1. FH1-SSB(-HD) (auxiliary code P-5 and earlier) NOTICE 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.

  • Page 81: G2. Fh1-Ssb(-Hd) (Auxiliary Code P-6 To S-5)

    G2. FH1-SSB(-HD) (auxiliary code P-6 to S-5) NOTICE 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.

  • Page 82: G3. Fh1-Ssb(-Hd) (Auxiliary Code S-6 And Later)

    G3. FH1-SSB(-HD) (auxiliary code S-6 and later) NOTICE 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.

  • Page 83: H1. Fh2-Ssb(-Hd) (Auxiliary Code P-5 And Earlier)

    H1. FH2-SSB(-HD) (auxiliary code P-5 and earlier) NOTICE 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.

  • Page 84: H2. Fh2-Ssb(-Hd)(-Hdcu) (Auxiliary Code P-6 And Later)

    H2. FH2-SSB(-HD)(-HDCU) (auxiliary code P-6 and later) NOTICE 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.

  • Page 85: Rfh1-Ssb-Hd

    I. RFH1-SSB-HD 1. Refrigerator N/O Close on Clogged Filter Temperature Thermostat Rise N/C Open on Pressure Rise Control Transformer Output 10VAC at 115VAC Input * High-Pressure Switch Cut-out 490± PSIG RFH1-SSB-HD Main Wiring Power Cord Connections Cut-in 370± PSIG Control Board...

  • Page 86: 2A. Freezer (Auxiliary Code P-5 And Earlier)

    I. RFH1-SSB-HD 2a. Freezer (auxiliary code P-5 and earlier) N/O Close on Temperature Rise Clogged Filter Thermostat N/C Open on Pressure Rise Control Transformer Output 10VAC at 115VAC Input * High-Pressure Switch Control Board Automatically Adjusts Cut-out 490±10 PSIG to N/O or N/C...

  • Page 87: 2B. Freezer (Auxiliary Code Q-5 And Later)

    I. RFH1-SSB-HD 2b. Freezer (auxiliary code Q-5 and later) N/O Close on Temperature Rise Clogged Filter Thermostat N/C Open on Pressure Rise Control Transformer Output 10VAC at 115VAC Input * High-Pressure Switch Control Board Automatically Adjusts Cut-out 490±10 PSIG to N/O or N/C...

  • Page 88: Rfh1-Ssb(-Hs)(-Hse)

    J. RFH1-SSB(-HS)(-HSE) 1. Refrigerator N/O Close on Temperature Rise N/O Close on Pressure Rise Control Transformer Output * High-Pressure Switch 10VAC at 115VAC Input Control Board Cut-out 270±10 PSIG Automatically Adjusts Cut-in 190±20 PSIG to N/O or N/C High-Pressure Switch...

  • Page 89: Freezer

    J. RFH1-SSB(-HS)(-HSE) 2. Freezer...

  • Page 90: Rfh2-Ssb(-Hd)

    K. RFH2-SSB(-HD) See diagram for See diagram for FH1-SSB(-HD) RH1-SSB(-HD) L. RFH3-SSB(-HD) See diagram for See diagram for FH1-SSB(-HD) RH2-SSB(-HD) NOTICE 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...

  • Page 91: Ptr1Ssb01-10

    M. PTR1SSB01-10 NOTICE 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.

  • Page 92: Ptr1Ssb(-Fsfs)(-Hshs)

    N. PTR1SSB(-FSFS)(-HSHS) NOTICE 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.

  • Page 93: Ptr1Ssb(-Fgfg)(Hghs)(-Hghg) (Auxiliary Code T-5 And Earlier)

    O. PTR1SSB(-FGFG)(HGHS)(-HGHG) (Auxiliary Code T-5 and Earlier NOTICE 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.

  • Page 94: Ptr1Ssb(-Fgfg)(-Hghs)(-Hghg) (Auxiliary Code T-6 And Later)

    P. PTR1SSB(-FGFG)(-HGHS)(-HGHG) (Auxiliary Code T-6 and Later NOTICE 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.

  • Page 95: Ptr2Ssb(-Fsfs)(-Hshs)

    Q. PTR2SSB(-FSFS)(-HSHS) NOTICE 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.

  • Page 96: Ptr2Ssb(-Fgfg)(-Hghg)

    R. PTR2SSB(-FGFG)(-HGHG) NOTICE 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.

  • Page 97: Rir1-Ssb

    S. RIR1-SSB NOTICE 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.

  • Page 98: Rir2-Ssb

    T. RIR2-SSB NOTICE 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.

  • Page 99: Rir2-Ssb51-02

    U. RIR2-SSB51-02 NOTICE 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.

  • Page 100: Rtr1-Ssb

    V. RTR1-SSB NOTICE 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.

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