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Hoshizaki Temp Guard PTR1SSB01-10 Service Manual

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TempGuard
HOSHIZAKI
PASS THROUGH
TM
MODEL
PTR1SSB01-XX
with
SERVICE MANUAL
NUMBER:
ISSUED:
SEPT. 24, 2002
REVISED:
JUNE 9, 2004
73102

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Summary of Contents for Hoshizaki Temp Guard PTR1SSB01-10

  • Page 1 TempGuard PTR1SSB01-XX SERVICE MANUAL HOSHIZAKI PASS THROUGH MODEL with NUMBER: 73102 ISSUED: SEPT. 24, 2002 REVISED: JUNE 9, 2004...
  • Page 2 Service Manual. 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 or write to the HOSHIZAKI Technical Support Department for assistance.

  • Page 3: Table Of Contents

    I. ELECTRONIC CONTROL OPERATION ... 4 1. NORMAL ELECTRONIC CONTROL PROCESS FLOW ... OPERATION FOR REFRIGERATOR ... 4 2. TIME - TEMPERATURE CONTROL CHART FOR REFRIGERATOR ... 5 3. DISPLAY BOARD ... 6 4. ALARM / ALERT SIGNALS ... 8 5.

  • Page 4: Electronic Control Operation

    I. ELECTRONIC CONTROL OPERATION 1. NORMAL ELECTRONIC CONTROL PROCESS FLOW OPERATION FOR REFRIGERATOR POWER ON Board Self Check Display Read R## (## is chip revision) 1) Frame heaters on 2) Evaporator fan on Cycle On (Cut-on Temperature reached) Continues as normal cycling [Minimum 2.5 minutes]...

  • Page 5: Time - Temperature Control Chart For Refrigerator

    2. TIME - TEMPERATURE CONTROL CHART FOR REFRIGERATOR...

  • Page 6: Display Board

    3. DISPLAY BOARD The Display Board is located on the right hand side of the painted Control Panel between the top of the Door and the Front Panel. From this area information regarding the functioning of the unit can be obtained.
  • Page 7 When unit is turned on, first display is “R##”, where “##” indicates chip revision level. 1) TEMPERATURE DISPLAY • The cabinet temperature is displayed (factory set is °F, but can be changed to read °C). • The cabinet temperature is updated every 20 seconds. 2) GUARDED ACCESS MENU Three settings can be viewed and changed from this menu: 1.

  • Page 8: Alarm / Alert Signals

    4. ALARM / ALERT SIGNALS (*EXCLUDING GLASS DOOR MODELS) ALARM ERROR MESSAGE “E1” every 2 3 beeps every ten seconds, seconds alternating with cabinet temp. readout “E2” every 2 4 beeps every 10 seconds, seconds alternating with cabinet temp. readout 6 beeps “E4”...
  • Page 9 ALARM ERROR MESSAGE 8 beeps “E6” every 2 sec- every 10 onds, alternating with seconds cabinet temp. 9 beeps “E7” every 2 sec- every 10 onds, alternating with seconds cabinet temp. 1 beep “CF” every 2 sec- every 10 onds, alternating with seconds cabinet temp.;...
  • Page 10 a) HIGH TEMPERATURE ALARM FUNCTION abinet temp. has exceeded set temp. by 10°F or more for more than 2 hours, When c an alarm buzzer sounds 3 beeps every 10 seconds, and an error message “E1” flashes every 2 seconds, alternating with the cabinet temperature readout. Reset Options: If temperature has returned to setpoint range, pressing “RESET”...
  • Page 11 c) HIGH PRESSURE ALERT FUNCTION In order to protect the compressor if the discharge pressure reaches a preset value (outside the normal operating range), a switch will temporarily stop the compressor. At another preset pressure, the compressor will attempt to restart. If the switch is triggered 3 times in 1 hour, the buzzer will sound 6 beeps every 10 seconds, and “E4”...

  • Page 12: Defrost

    f) CLEAN FILTER ALERT FUNCTION The unit is equipped with a filter for protecting the condenser from dirt, oils, grease, etc. The filter promotes clean condenser surfaces and efficient operation and should be checked monthly and cleaned when necessary. The unit is also equipped with a sensor to determine if this filter is excessively dirty.

  • Page 13: Start-Up Delay

    6 . START-UP DELAY 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. Note: The compressor must run 2 1/2 minutes minimum during every run cycle. 7.

  • Page 14: Diagnostic Menu

    9. DIAGNOSTIC MENU Access to Diagnostic Menu is gained by pressing and holding the up/down arrows and ENTER button together for three seconds. Scroll through menu options using the “ENTER” button. Change options using up/down arrows. Reset alarm conditions using “RESET” button.
  • Page 15 6 45 Number in right three digits represents Compressor run time for the last run cycle. Example: 45 minutes of Compressor run time in last run cycle. 7 45 Has no meaning on Pass Through models. 8 67 Number in right two digits represents highest temperature recorded during the last high temperature alarm.
  • Page 16 IF DISPLAY REASON READS AIR FILTER ELEMENT NEEDS CLEANING. WHEN CABINET TEMPERATURE HAS EXCEEDED SET TEMPERATURE BY 10°F OR MORE FOR MORE THAN 2 HOURS. CABINET TEMPERATURE 8°F BELOW SETPOINT FOR 1 HOUR OR MORE. HIGH PRESSURE ALARM. SWITCH. CALL FOR SERVICE. HIGH VOLTAGE ALARM.

  • Page 17: Control Board

    10. CONTROL BOARD 1) A HOSHIZAKI exclusive solid-state control is employed in all Hoshizaki Pass Throughs. 2) A Printed Circuit Board (“Control Board”) includes a stable and high quality control system. 3) All models are pretested and factory-adjusted. 1. Fragile, handle very carefully.
  • Page 18 A: Condenser Fan Relay B: Compressor Relay C: Defrost Heater Relay D: Door Heater Relay E: Evaporator Fan Relay High Voltage Legend: brown: Power to Condenser Fan, after relay contact made black #1: Power to Condenser Fan Relay before contact gray: Power to external Compressor Relay, after Board Relay contact made black #2: Power to Compressor Relay...

  • Page 19: Service Diagnosis

    II. SERVICE DIAGNOSIS PROBLEM Compressor will a) Power Supply not start—no current draw. b) Cord and Plug c) Ground Fault Circuit Interrupter d) Transformer e) Wiring to Controller Board f) Voltage g) High Pressure Switch h) Thermistor i) Controller Board j) Compressor overload k) Compressor l) Relay (Condensing...
  • Page 20 PROBLEM POSSIBLE CAUSE Compressor runs a) Voltage intermittently and trips on overload. b) Condenser Filter c) Refrigerant Line or Component d) Condenser Fan Motor e) Refrigerant f) Location of unit Cabinet inside a) Thermistor defective. temperature too high; Compressor b) Compressor Relay defective. (LED 4 is ON. 115V to Relay Coil.) will not start.
  • Page 21 PROBLEM a) Bad connection between Control Board and Display Cabinet tempera- Board ture display b) Display Board defective indicator does not c) Control Board defective illuminate properly. a) Thermistor defective. Cabinet inside temperature too b) Compressor relay defective; contacts welded. c) Circuit Board defective.
  • Page 22 Thermistor Service Procedure A thermistor (Semiconductor) is used for a cabinet control sensor and defrost termination sensor. The resistance varies depending on temperatures. No adjustment is required. If necessary, check for resistance between Thermistor leads, and visually check the Ther- mistor mounting.

  • Page 23: Removal And Replacement Of Components

    5) Disconnect the Vacuum Pump, and attach a Refrigerant Service Cylinder to the High-side line. 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 No.

  • Page 24: Brazing

    6) A liquid charge is recommended for charging an R-404A system. Invert the service cylinder. Open the High-side, Service Manifold Valve. 7) Allow the system to charge with liquid until the pressures balance. 8) If necessary, add any remaining charge to the system through the Low-side. Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the Low-side access port with the unit running.

  • Page 25: Removal And Replacement Of Compressor

    3. REMOVAL AND REPLACEMENT OF COMPRESSOR Note: When replacing a Compressor with a defective winding, be sure to install the Start Capacitor, Overload and Start Relay. 1) Turn off the power supply, and unplug the unit. 2) Remove the panels. 3) Recover the refrigerant and store it in an approved container.

  • Page 26: Removal And Replacement Of Drier

    4. REMOVAL AND REPLACEMENT OF DRIER Always install a new Drier every time the sealed refrigeration system is opened. Do not replace the Drier until after all other repair or replacement has been made. 1) Turn off the power supply, and unplug the power supply. 2) Remove the panels.

  • Page 27: Removal And Replacement Of Expansion Valve

    5. REMOVAL AND REPLACEMENT OF EXPANSION VALVE 1) Turn off the power supply, and unplug the unit. 2) Remove the panels. 3) Recover the refrigerant and store it in an approved container. 4) Remove the insulation and the Expansion Valve Bulb on the suction line. 5) Remove the Expansion Valve Cover, and disconnect the Expansion Valve using brazing equipment or tubing cutter.

  • Page 28: Removal And Replacement Of Evaporator

    6. REMOVAL AND REPLACEMENT OF EVAPORATOR 1) Turn off the power supply, and unplug the unit. 2) Remove the panels and the Top Cover over the Evaporator. 3) Recover the refrigerant and store it in an approved container. 4) Remove the Insulation Tubing, and disconnect the Evaporator Inlet and Outlet Tubing .

  • Page 29: Removal And Replacement Of Door Closure Spring

    8. REMOVAL AND REPLACEMENT OF DOOR CLOSURE SPRING Wear eye protection and use caution when removing the tension screw [step 2)]. 1) Open the Front Panel Assemby to gain access to the upper hinge brackets. 2) Remove the bushing cover from the top of the spring cartridge assembly. Pivot Pin Hinge Washer Bushing Cover...

  • Page 30: Removal And Replacement Of Control Board

    8) Replace the cartridge assembly with one of a like spring color. Blue for left hand hinged door and black for right hand hinged door. Be certain that the spring ends are engaged in the cartridge and the tension spindle assembly. 9) Repeat steps 1 through 8 for additional doors as necessary.

  • Page 31: Door Re-Hinging

    10. DOOR RE-HINGING (STEEL DOORS ONLY) 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 Half HS-3529 Left to Right Half HS-3530 The door hinges on the right cabinet wall.

  • Page 32: Cleaning Instructions

    IV. 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.

  • Page 33: Wiring Diagram

    V. WIRING DIAGRAMS 1. PTR1SSB01-XX...

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