Hoshizaki FS-1022MLH-C service manual Bin Control Check, Infrared Sensor Check

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D. Bin Control Check

1. Infrared Sensor Check

IMPORTANT

Make sure S1 dip switch 7 is in the "ON" position. This allows the control board to monitor the infrared sensor along with the mechanical backup bin control.

1)Remove the front panel.

2)Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet.

3)Remove the control box cover and access CB. Confirm that S1 dip switch 1, 2, 3 are in the proper position for your application. See "II.C.3.b) Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, 3)."

4)Confirm that IS is connected to the K6 connector on CB. Wipe down the IS lens with a clean, warm, damp cloth. If the bottom of the icemaker is not accessible in your application, remove the thumbscrew securing the IS housing, then remove the housing from the base. See Fig. 3.

5)Make sure the control switch is in the "ICE" position, then plug the icemaker into the electrical outlet.

6)Move the power switch to the "ON" position to start the automatic icemaking process.

Check that the IS green LED is on. The green LED confirms 20VDC power from CB to IS and remains on constantly. Diagnosis: If the green LED is not on, confirm 20VDC at K6 connector dark blue (DBU) to brown (BR). If 20VDC is present and the green LED is off, IS is bad and must be replaced. If not, see step "3) IS Power Supply," under "IV.C. Control Board Check."

7)Make sure the "GM" LED on CB is on. There is a delay of at least 30 seconds before the "GM" LED turns on after power-up. After the "GM" LED turns on, press the "SERVICE" button on CB to bypass the 5-minute ice purge cycle. WARNING! Risk of electric shock. Care should be taken not to touch live terminals.

8)"GM" and "COMP" LEDs are on. Use an object to cover IS lens. The yellow LED on IS turns on (flashing or steady). The yellow LED flashes when ice is at the outer limit of its range and turns steady as ice nears. After the yellow LED turns on (flashing or steady), IS shutdown delay timer starts . See "II.C.3.b)Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, 3)." Comp and FMR should de-energize immediately after the shutdown delay timer terminates. Five minutes later, GM should de‑energize. Diagnosis: If the yellow LED is not on after covering the lens, IS is bad and must be replaced. If the unit remains on after IS shutdown delay timer terminates and the 5-minute ice purge timer terminates, CB is bad and must be replaced. If IS fails to shut down the icemaker and the level of ice activates MBC, the icemaker shuts down within 10 seconds of MBC opening and a 9-beep alarm sounds. To reset, move the power switch to the "OFF" position, and then back to the "ON" position.

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Contents SRC-10H Hoshizaki AMERICA, INC Contents Page Serious injury Important Safety InformationIndicates important information about the use and care UnitFor SRC FS-1022MLH-C Specifications IcemakerSRC-10H Condensing UnitIcemaker FS-1022MLH-C II. General Information ConstructionCondensing Unit a SRC-10H Icemaking Unit Sequence Cycles and Shutdown Sequence of OperationDrain Cycle Shutdown Cycle Sequence Flow Chart Control Board Sequence Flow Chart FS-1022MLH-C/SRC-10HControl Board Control Board Control Board LayoutNo. of Beeps Type of Alarm Reset Options Every 5 sec LED Lights and Audible Alarm SafetiesSequence Step Energized Components Min MaxControls and Adjustments S1 Dip Switch Setting Infrared Sensor Shutdown DelaySeconds 1.6 minutes Factory Default S1 Dip Switch Setting Dispense Time S1 Dip Switch Setting Drain Timer IntervalBackup S1 Dip Switch MechanicalShutdown Delay Bin ControlIII Wiring Diagrams Control Low-Pressure Switch Safety Low-Pressure Switch Manual ResetHigh-Pressure Switch FS-1022MLH-C with SRC-10H Performance DataIV. Service Diagnosis Diagnostic ProcedureIce Production Check Page Page Page Control Board Check 5VDC Page Infrared Sensor Check Bin Control CheckMechanical Backup Bin Control Check Page Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Page Diagnostic Charts No Ice ProductionNo Ice Production Possible Cause Startup No Ice Production Possible Cause Shutdown Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery BrazingEvacuation and Recharge R-404A Important Notes for Component Replacement Evaporator Assembly Components. See FigComponent Evaporator Assembly Upper Bearing Wear Check Removal and Replacement of CutterRemoval and Replacement of Auger Removal and Replacement of Extruding HeadRemoval and Replacement of Evaporator Page Removal and Replacement of Gear Motor 6b. Lower HousingPage Cleaning and Sanitizing Instructions VI. Cleaning and MaintenanceCleaning Solution Cleaning ProcedureFloat Switch Assembly Reservoir Cover Sanitizing Procedure Initial Sanitizing SolutionSanitizing Procedure Final Maintenance Frequency Area Task Maintenance SchedulePreparing the Icemaker for Long Storage Remove the water from the icemaker water supply lineDrain the evaporator
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