Ice-O-Matic GEM1256A/W Electrical Sequence, Shut Down, Control Board Protection Devices, To Reset

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Electrical Sequence

GEM0650/0956/1256 A/W

Electrical Sequence

Electrical Sequence:

There are 7 indicator lights on the control board:

●WTR-OK:(Water OK) Green. Normal=Glowing. Glow when there is water in the reservoir.

●PWR-OK:(Power OK) Green. Normal=Glowing. Glows when the power board has power and is functional.

●Service: Red. Normally Off.

●Freeze: Red. Normally glowing when making ice.

●Bin Full: Red. Normally Off when making ice.

●LED1: White. Located next to the Control Board’s Compressor Relay. Normally glowing when making ice.

●LED2: White. Located next to the Control Board’s Auger Motor Relay. Normally glowing when making ice.

If the machine is switched OFF at the mode switch, but otherwise ready to go, switching the mode switch ON does the following:

●The PWR-OKlight glows.

●If there is water in the float reservoir, the WTR-OKlight glows.

●After 10 seconds the Freeze, LED1 and LED3 lights glow and the machine starts up.

Start Up:

●The compressor relay and auger motor relay become energized, connecting power to the windings of the auger motor and contactor coil.

●The contactor is energized, connecting power to the compressor, and the compressor starts.

●As ice is made it passes between the ice level sensors but because it is not a continuous stream it only interrupts the sensor’s infrared beam momentarily. The bin full light remains off and the machine stays on until ice builds up in the bin and blocks the path between the sensors for 6 seconds or longer. When that occurs the bin full light glows and the machine shuts down.

Shut Down:

●The compressor relays opens, LED1 goes out. ●The compressor contactor opens.

●The auger motor stays on for 1 more minute, clearing out ice in the evaporator, and then ●The auger motor relay opens, LED3 goes out and the auger motor stops.

The compressor will not restart until 2 minutes or more have passed after last shutdown. If the path between the ice level sensors remains clear for more than 10 seconds the ice machine will restart.

Control Board Protection Devices:

●When the water level in the reservoir falls below the water level sensor’s tip, the WTR-OKlight goes out and the machine shuts down. When water refills the reservoir the WTR-OKlight glows and the machine starts up again.

●If the auger drive motor currents becomes excessive the compressor and auger drive motor will be switched OFF and the Service light will blink. The control board will restart the auger drive motor in 4 minutes. If during the first 60 seconds after restart the auger motor current stays within limits, the compressor is restarted and the machine returns to normal operation. If the auger motor’s current is excessive within 60 seconds after restart, the process will be repeated once more. If during that try the current is still excessive the machine shuts down and must be manually reset. The Service light will then be glowing continuously.

To Reset:

●Switch power to the unit off and then back on.

Other Protection Devices:

●If the high pressure control cut out switch opens the machine will stop immediately. It will automatically reset when the high pressure falls below its cut in point.

●If the low pressure control cut out switch opens the machine will stop immediately. It will automatically reset when the pressure rises above its cut in point.

●The mode (ON-OFF)switch is the manual control for the complete machine, but it is not a service disconnect.

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Contents GEM0655 Air SERVICE AND INSTALLATION MANUALGEM0650A/W,GEM0956A/W and GEM1256A/W Page GEM0650/0956/1256 A/W ForwardKeep this manual for future reference PageTable Of Contents Table of ContentsFreight Claim Procedure Inspect PromptlyVisible Loss or Damage Concealed Loss or DamageWarranty ICE-O-MaticLimitation of Warranty Filing a ClaimFor the Installer Installation GuidelinesElectrical Specifications AdjustmentsFor The Installer GEM0650/0655/0956A/WGEM1256A/W Ice Machine Specifications Bin ApplicationLocation Storage BinIce machine Water LimitationsGEM 0650/0956/1256 A/W For the Plumber Water InletWATER COOLED MODELS AIR COOLED MODELSFor the Electrician Electrical ConnectionsWater Cooled Models Air Cooled ModelsGEM0650/0956/1256A/W Final Check ListStart Up Start UpPre-StartInspection Component Description Air Cooled Model ShownGEM0650/0956/1256 A/W Component Description Ice Sweep Bearing Breaker/Divider Auger Evaporator Motor Water SealTo Reset Electrical SequenceElectrical Sequence Shut DownOperation Water Water SystemHigh Pressure Cut Out- Automatic Reset Low Pressure Cut Out- Automatic ResetOperation: Performance Typical Low Side PressureSanitizing and Cleaning ICE MAKING SYSTEM: In place cleaningscheduled at a minimum of twice a year KEEP OUT OF THE REACH OF CHILDRENNote Left Hand Threads Bearing MaintenanceBearing Maintenance Water Sensor Sensor MaintenanceBin Control Sensor Maintenance Air Cooled Clean the air cooled condenserGEM0956 GEM0650Auger Maintenance 1. Disconnect electrical power to the ice machineAuger 2. Turn off the water supply to the ice machineService Diagnosis SymptomPossible Cause Probable CorrectionService Diagnosis Control System Diagnostics 4.High pressure cut out checkBin Controls Ice Level Sensors R&R- Water Reservoir, Bin ControlWater Reservoir To Remove the Breaker Bearing Assembly R&R-Bearingand BreakerR&R-Auger To Remove the AugerR&R-WaterSeal To Remove the Water SealRemoval of the Water Seal To Replace the Water SealTo Reassemble the Evaporator and Auger R&R-EvaporatorTo Replace the Evaporator To Remove and Repair the Gear Motor Assembly R&R-GearMotorTo Check the Gear Motor To Inspect the Gear MotorR&R-FanBlade and Motor Refrigeration Service Instructions for Liquid Charging R404AGEM0650 Wiring Diagram Wiring Diagram GEM0650 A/WGEM0956 Wiring Diagram Wiring Diagram GEM0956 A/WGEM1256 Wiring Diagram Wiring Diagram GEM1256 A/WGEM0655 Wiring Diagram Wiring Diagram GEM0655 AirService History What to Do Before Calling for Service
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