Related Manuals for Hoshizaki SSE Series
Summary of Contents for Hoshizaki SSE Series
- Page 1 Hoshizaki Hoshizaki America, Inc. Professional Series Refrigerated Kitchen Equipment Model SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com Number: 73177 Issued: 4-14-2010 Revised: 9-17-2015...
- Page 2 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.
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Page 3: Table Of Contents
IMPORTANT This manual should be read carefully before 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. - Page 4 5. Guarded Access Menu ..................20 a) Temperature Setpoint ..................20 b) Defrost Frequency .................... 20 c) Temperature Display Scale (°F or °C) .............. 21 6. Service Menu ......................22 E. Compressor Thermal Overload and Short Cycle Protection ........23 F.
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Page 5: 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 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. -
Page 6: General Information
I. General Information A. Construction 1. One Section Top Cover Evaporator Case Cover Compressor and Compressor Electronic Unit Condenser Fan Motor Condenser Evaporator Condenser Air Filter Control Box Cover Evaporator Fan Motor Cabinet Thermistor Defrost Thermistor Front Panel Perimeter Heater Switch Display Board Power Switch... -
Page 7: Two Section
2. Two Section Compressor and Top Cover Compressor Electronic Unit Condenser Fan Motor Evaporator Condenser Case Cover Condenser Air Filter Control Box Cover Defrost Thermistor Display Board Cabinet Thermistor Evaporator Fan Motor Front Panel Evaporator Perimeter Heater Switch Power Switch Light Switch (glass door model) Control Board... -
Page 8: Three Section
3. Three Section Top Cover Compressor and Compressor Electronic Unit Condenser Fan Motor Evaporator Case Cover Front Panel Condenser Condenser Air Filter Defrost Thermistor Control Box Cover Cabinet Thermistor Evaporator Fan Motor Evaporator Display Board Power Switch Perimeter Heater Switch Door Control Board Door Lock... -
Page 9: Sequence Of Operation
(1b) Optional Time-Initiated Defrost The optional time-initiated defrost is factory set to 0 times per day. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. When set to greater than 0, defrost initiates when the defrost timer terminates. For further details, see "II.D.5.b) Defrost Frequency."... -
Page 10: Sequence Flow Chart
2. Sequence Flow Chart... -
Page 11: Display Board
C. Display Board 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., r23C). Afterward, the current cabinet temperature is displayed. The display board also allows for access to the guarded access menu and service menu. -
Page 12: Control Board
D. Control Board • A Hoshizaki exclusive control board is employed in all Hoshizaki Professional Series Reach-Ins. • All models are pretested and factory set CAUTION 1. The control board is fragile, handle very carefully. 2. The control board contains integrated circuits, which are susceptible to failure due to static discharge. -
Page 13: Control Board Layout
1. Control Board Layout... -
Page 14: Features
2. Features a) LED Display The display board identifies system details and diagnostic information. A ribbon cable connects the display board to the control board for system communication. Be sure to keep the ribbon cable at least 1-1/2" away from high voltage leads (100VAC or more) to protect against electrical noise. -
Page 15: Led Lights And Alarm Safeties Chart
3. LED Lights and Alarm Safeties Chart With proper power supply, the "POWER OK" LED energizes and remains on. LEDs 1 through 5 energize as the unit cycles through the sequence of operation. If an error occurs, the alarm code and cabinet temperature are displayed in 2-second intervals and an alarm sounds. - Page 16 Alarm Signals (continued) Alarm No. of Beeps Code (every 10 sec.) Problem Reset Options Defrost Thermistor After replacing thermistor, alarm During alarm, unit operates in the defrost resets. thermistor fail mode. Constant During alarm, press the display board Defrost Thermistor Fail Mode: Defrost occurs "RESET"...
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Page 17: Controls And Adjustments
Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact Hoshizaki Technical Support at 1-800-233-1940. a) Default Dip Switch Settings The S3 dip switch settings are factory-set to the following positions: S3 Dip Switch Dip Switch No. -
Page 18: C) Cabinet Light/Heated Glass Door (S3 Dip Switch 2)
Heated Glass Door (No Longer Applicable) d) 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 19: G) Dual Temp Unit (S3 Dip Switch 6)
g) Dual Temp Unit (S3 dip switch 6) Dual Temp units require S3 dip switch 6 be placed in the "ON" position for proper operation. CAUTION! Do not adjust S3 dip switch 6 out of the factory default position on this model. This dip switch must be left in the factory default position or this unit will not operate correctly. -
Page 20: Guarded Access Menu
• Defrost Termination Temperature: 40°F (4.4°C). • Defrost Initiated Time: Adjustable between 0 and 12 defrosts per 24 hrs. The factory default setting is 0. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. When changed, the defrost setting will take effect after the next defrost based on the previous setting. -
Page 21: C) Temperature Display Scale (°F Or °C)
3) To save the value, press the "ENTER" button repeatedly until you have cycled through the menu and the unit returns to normal display mode. If you do not cycle through the menu and no button is pressed within 15 seconds, the display returns to normal and the defrost frequency remains unchanged. -
Page 22: Service Menu
6. Service Menu From the service menu information regarding the functioning of the unit 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"... -
Page 23: Compressor Thermal Overload And Short Cycle Protection
E. Compressor Thermal Overload and Short Cycle Protection 1. Compressor Thermal Overload: When a temperature or amperage value is above the limit specified by the compressor manufacturer, a thermal overload activates, turning off the compressor. The compressor restarts when the thermal overload resets. •... -
Page 24: Technical Data
III. Technical Data A. Wiring Diagrams 1. RH_-SSE-XX (FG, HG, FS, or HS) Models Transformer Ouput 10V at 115VAC Input... -
Page 25: Ptr_Sse-Xxxx (Fsfs, Hshs, Fgfg, Hghg, Hghs) Models
2. PTR_SSE-XXXX (FSFS, HSHS, FGFG, HGHG, HGHS) Models... -
Page 26: Service Diagnosis
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. - Page 27 7) Startup–no component LEDs are on (LED 3 off for EvapFM operation): There is a 5-second delay while CB identifies program revision. Revision (r###) is shown on DB. After 5-second delay, DB shows current cabinet temperature and EvapFM energizes. 2.5 minute Comp delay timer starts. Diagnosis: Check that red "POWER OK" LED is on.
- Page 28 9) Defrost–LED 5 (ConFM) is on: Temperature-Initiated Defrost: Dth cools to 13°F (-10°C), CB initiates defrost. EvapFM and ConFM continue. Comp de-energizes. If ConFM is off, ConFM energizes once defrost starts. Time-Initiated Defrost: If the factory time-initiated setting is moved from 0 defrost per 24 hours, the unit enters the defrost cycle once the time of the new setting expires.
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Page 29: Control Board Check
B. Control Board Check Before replacing a control board 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 white (W) neutral wire to establish a good neutral connection when checking high voltages. -
Page 30: 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 31: Diagnostic Chart
D. Diagnostic Chart 1. Unit Not Cooling Problem Possible Cause Remedy [1] Unit does not a) Power Supply 1. Unplugged, off, blown fuse, 1. Turn on, reset, or replace. start. or tripped or defective circuit breaker. 2. Loose connection. 2. Tighten. 3. - Page 32 [3] Cool down g) Overload 1. Open. 1. Let compressor cool and overload does not start. reset. If overload does not reset, (compressor) replace compressor. If overload (continued) resets, check compressor amperage and operating voltage. 2. Clogged filter or condenser 2.
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Page 33: Evaporator Is Frozen Up
[5] Cabinet a) Setpoint 1. Incorrect. 1. Correct setpoint. Temperature Factory defaults: Too Low Refrigerator 36°F (2°C). b) Cabinet Thermistor 1. Defective. 1. Check and replace. c) Evaporator Fan Motor 1. Defective. 1. Replace. d) Control Board 1. Defective. 1. See "IV.B. Control Board Check." 2. -
Page 34: Removal And Replacement Of Components
V. Removal and 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 and unplug the unit from the electrical outlet before servicing. -
Page 35: Brazing
2. Brazing WARNING 1. R-134a itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). 2. R-134a itself is not explosive or poisonous. However, when exposed to high temperatures (open flames), R-134a can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous. -
Page 36: Removal And Replacement Of Compressor
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. -
Page 37: Removal And Replacement Of Compressor Electronic Unit
9) Remove the drier, then place the new drier in position. 11) Remove plugs from the suction, discharge, and process pipes. 12) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG. See "V.A.2. Brazing." 13) Use an electronic leak detector or soap bubbles to check for leaks. -
Page 38: Removal And Replacement Of Expansion Valve
D. Removal and Replacement of Expansion Valve Moisture in the refrigeration circuit may exceed drier capacity and freeze up at the expansion valve. 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. -
Page 39: Removal And Replacement Of Evaporator
E. Removal and Replacement of Evaporator 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. -
Page 40: Removal And Replacement Of Evaporator Fan Motor
F. Removal and Replacement of Evaporator Fan Motor 1) Raise the front panel, then move the power switch to the "OFF" position and unplug the unit. 2) Remove the evaporator case cover and panels. 3) Remove the screws securing the evaporator fan bracket, then remove the evaporator fan bracket and fan motor. -
Page 41: Removal And Replacement Of Door Closure Spring
H. Removal and Replacement of Door Closure Spring WARNING Wear eye protection and use caution when removing the tension screw (step 3). 1) Raise the front panel. Then, move the power switch to the "OFF" position and unplug the unit. 2) Remove the wire cover. -
Page 42: Door Re-Hinging
I. Door Re-Hinging 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... -
Page 43: Removal And Replacement Of Thermistors
K. Removal and Replacement of Thermistors This section covers removal and replacement of the cabinet and defrot thermistors. For a thermistor check procedure, see "IV.C. Thermistor Check." CAUTION 1. The thermistors are fragile; handle very carefully. 2. Do not shorten or cut the thermistor leads. 1. -
Page 44: Cleaning Instructions
VI. Cleaning Instructions 1. Stainless Steel Exterior Wipe the exterior occasionally with a clean, soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up. 2. Stainless Steel Interior Spills should be wiped up promptly to avoid unpleasant odors. The cabinet interior should be cleaned periodically with a mild soap or detergent.