Hoshizaki FS-1022MLH-C IV. Service Diagnosis, Ice Production Check, Diagnostic Procedure

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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.

3.Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

4.CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the unit is serviced. Make sure that none have fallen into the dispenser unit/storage bin.

5.Make sure all food zones in the icemaker and dispenser unit/storage bin are clean after the unit is serviced. For cleaning procedures, see "VI. Cleaning and Maintenance."

A. Ice Production Check

To check production, prepare a bucket or pan to catch the ice and a set of scales to weigh the ice. After the icemaker has operated for 10 to 20 minutes, catch the ice production for 10 minutes. Weigh the ice to establish the batch weight. Multiply the batch weight by 144 for the total production in 24 hours.

B. Diagnostic Procedure

This diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components. Before proceeding, check for correct installation, adequate water supply (minimum of 10 PSIG, maximum of 113 PSIG) and proper voltage per unit nameplate. Check that the 24VAC 1A fuse and the 115VAC 3A GM fuse are good. When checking for high-voltage (115VAC), always choose a white (W) neutral wire to establish a good neutral connection. When checking for low-voltage (secondary) (24VAC), always choose a light blue (LBU) neutral wire to establish a good neutral connection. If the icemaker is in alarm, see "II.C.2. LED Lights and Audible Alarm Safeties."

Note: EH energizes when "GM" LED turns on. CB X1 Comp relay energizes PDS. Pressure rises in the refrigeration system and closes CLPS. MC is energized when CLPS closes, energizing Comp and FMR.

1)Remove the front panel, then move the power switch to the "OFF" position.

2)Unplug the icemaker from the electrical outlet.

3)Remove the control box cover and access CB.

4)Check the S1 dip switch settings, see "II.C.3.a) Default Dip Switch Settings" to assure that they are in the correct positions. For proper operation of IS, confirm that S1 dip switch 7 is in the "ON" position.

5)Startup – "POWER OK" LED is on. Plug the icemaker into the electrical outlet, then move the power switch to the "ON" position. Move the control switch to the "ICE" position. CB "POWER OK" LED and IS green LED should be on. Diagnosis "POWER OK" LED: CB POWER OK" LED is off. Check for proper supply voltage (115VAC) input to the control transformer. If 115VAC is not present, check the power switch and breaker. Next, check for proper 24VAC outpout voltage from the control transformer. Check CB

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Contents SRC-10H Hoshizaki AMERICA, INC Contents Page Indicates important information about the use and care Important Safety InformationSerious injury UnitFor SRC Specifications Icemaker FS-1022MLH-CCondensing Unit SRC-10HII. General Information Construction Icemaker FS-1022MLH-CCondensing Unit a SRC-10H Icemaking Unit Sequence of Operation Sequence Cycles and ShutdownDrain Cycle Shutdown Cycle Control Board Sequence Flow Chart FS-1022MLH-C/SRC-10H Sequence Flow ChartControl Board Control Board Layout Control BoardSequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Reset Options Every 5 sec Energized Components Min MaxSeconds 1.6 minutes Factory Default Controls and AdjustmentsS1 Dip Switch Setting Infrared Sensor Shutdown Delay S1 Dip Switch Setting Drain Timer Interval S1 Dip Switch Setting Dispense TimeShutdown Delay S1 Dip Switch MechanicalBackup Bin ControlIII Wiring Diagrams High-Pressure Switch Control Low-Pressure SwitchSafety Low-Pressure Switch Manual Reset Performance Data FS-1022MLH-C with SRC-10HIce Production Check IV. Service DiagnosisDiagnostic Procedure Page Page Page Control Board Check 5VDC Page Bin Control Check Infrared Sensor CheckMechanical Backup Bin Control Check Page Float Switch Cleaning Float Switch Check and CleaningFloat Switch Check Page No Ice Production Possible Cause Startup Diagnostic ChartsNo Ice Production No Ice Production Possible Cause Shutdown Removal and Replacement of Components Service for Refrigerant LinesEvacuation and Recharge R-404A Refrigerant RecoveryBrazing Component Important Notes for Component ReplacementEvaporator Assembly Components. See Fig Evaporator Assembly Removal and Replacement of Cutter Upper Bearing Wear CheckRemoval and Replacement of Extruding Head Removal and Replacement of AugerRemoval and Replacement of Evaporator Page 6b. Lower Housing Removal and Replacement of Gear MotorPage Cleaning Solution VI. Cleaning and MaintenanceCleaning and Sanitizing Instructions Cleaning ProcedureFloat Switch Assembly Reservoir Cover Sanitizing Solution Sanitizing Procedure InitialSanitizing Procedure Final Maintenance Maintenance Schedule Frequency Area TaskDrain the evaporator Preparing the Icemaker for Long StorageRemove the water from the icemaker water supply line
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