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GEM0650/0956/1256 A/W 

 

Control System Diagnostics 

 Page 

24 

 

The Control System consists of: 

Control Board 

Water Sensors 

Ice Sensors 

High Pressure Cut Out 

Low Pressure Cut Out 

 

 
If the unit is 

OFF

, check the 

control  board: 

 

 

1.  Is the Power 

OK

 light on?  If not check power to the unit.  If it has power, and the Power 

OK 

light is 

not

 on, 

check the high pressure and low pressure cut outs.  If they are both closed, replace the board.  If the 

POWER OK

 light is 

ON,

 go to the next step. 

 

2.  Is the Water 

OK

 light on?  If it is, go to the next step.  If not, check the water level in the reservoir.  If there is 

water in the reservoir, check that the water sensor is plugged in.  To check the water sensor: 

   a. Unplug the water sensor. 
   b. Pull the water sensor from the reservoir. 

 c. Place one ohmmeter lead on the sensor’s plug and the other on the sensor’s tip.  The meter should     

show nearly zero (0) resistance.  If it reads infinite resistance, check the tip for corrosion.  If it is clean and 
still reads open, replace the sensor.  

      OR, connect a copper wire to the wire where the water sensor plugs into and place the other end in the 

water.  The 

WATER

 

OK 

should go 

ON. 

 If it does not, replace the board. 

 

3. 

 Ice sensor Check

. Is the 

BIN FULL

 light 

OFF

?  If it is 

OFF

 and the 

SERVICE

 light is 

OFF

 and the unit is not 

running, replace the control board.   

  a. If it is 

OFF

 and the auger motor is running but the compressor is not, check the compressor contactor coil. 

  b. If it is 

ON

, the ice sensors may be blocked.  Remove them and check for mineral scale.  

 

 

4.

  High pressure 

cut out check. 

 

a

Disconnect electrical power. 

  b. Pull the wires off the high pressure cut out. 

   c. Use an ohmmeter to determine if the switch is 

OPEN

.  If it is, check the discharge pressure.  If the    

discharge pressure is less than 300 PSIG, replace the high pressure cut out.  

  d. If the high pressure cut out is open and the system has high discharge pressure, check for the cause. 
   
5.

  Low pressure 

cut out check. 

 

a.

 

Disconnect electrical power. 

  b. Pull the wires off the low pressure cut out. 

   c. Use an ohmmeter to determine if the switch is 

OPEN

.  If it is, check the suction pressure.  If the suction  

pressure is greater than 20 PSIG, replace the low pressure cut out.  

  d. If the low pressure cut out is open and the system has low suction pressure, check for the cause. 
 

Summary of Contents for GEM0650A/W

Page 1: ...ICE O Matic 11100 East 45th Ave Denver Colorado 80239 Part Number 9081350 01 Date 2 07 SERVICE AND INSTALLATION MANUAL GEM0650A W GEM0956A W and GEM1256A W GEM0655 Air...

Page 2: ......

Page 3: ...t E Mail Tech service iceomatic com Telephone Numbers Any Service communication must include 800 423 3367 All Departments Model Number 888 349 4423 Technical Assistance Only Serial number 303 371 3737...

Page 4: ...age 17 Bearing Maintenance Page 18 Sensor Maintenance Page 19 Air Cooled Maintenance Page 20 Auger Maintenance Page 21 Service Diagnosis Page 22 Control System Diagnostics Page 24 Removal and Replacem...

Page 5: ...er for carrier s inspection Visible Loss or Damage Any external evidence of loss or damage must be fully described and noted on your freight bill or express receipt and signed by the carrier s agent C...

Page 6: ...related to the replacement of non defective parts or components damage by fire flood or acts of God This warranty is valid only when installation service and preventive maintenance are performed by a...

Page 7: ...of condensate pumps for draining water is not recommended by ICE O Matic ICE O Matic assumes no responsibility for improperly installed equipment Water Filtration A water filter system should be inst...

Page 8: ...GEM0650 0956 1256 A W For The Installer Page 2 GEM0650 0655 0956A W...

Page 9: ...GEM0650 0956 1256 A W For The Installer Page 3 GEM1256A W...

Page 10: ...KGEMBIOD KBT25030 KGEMBIOD KGEMDIV Cornelius ED or DF150 KBT15022 R629088514 Cornelius Model KBT15022 R629088514 Cornelius Model Does not fit Cornelius ED or DF200 KBT25022 KGEM200 KBT25022 KGEM200 KB...

Page 11: ...oo far forward on the bin the opened door may not be stable resulting in an unexpected closing of the bin door If the ice machine is to be mounted on a bin or dispenser other than an ICE O Matic refer...

Page 12: ...heat and noise it produces are not objectionable Air cooled machines discharge hot air out the back and must have a minimum of 6 inches of clearance behind the ice machine Space for maintenance acces...

Page 13: ...nt should be followed Drains Air Cooled Models Connect a rigid drain tube to the 3 4 FPT drain fitting at the back of the cabinet The drain is a gravity type and a 1 4 inch per foot fall is the minimu...

Page 14: ...assis to earth ground Connect the ice machine to its own electrical circuit so it is individually fused Voltage variation must remain within the limitations even under starting conditions Note All ext...

Page 15: ...een made and checked for leaks _____5 Is the ice machine and storage bin level _____6 Is there a minimum of 6 inches of clearance at the back of the machine for proper service access and air circulati...

Page 16: ...air cooled models the condenser will begin to discharge warm air on water cooled models the water regulating valve will open and warm water will be discharged into the drain 5 The unit should soon be...

Page 17: ...maintains the water level in the evaporator at a constant level and it also contains the water level sensor Water Level Sensor Senses if there is water in the reservoir to make ice out of Will shut th...

Page 18: ...Controls the operation of the ice machine using input from the sensors and pressure controls Switches loads on and off thru relays Reference Photo Below Potential Relay The compressor start relay Mod...

Page 19: ...ry the sealing action being where the two faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker Divider Where the ice is compressed and...

Page 20: ...tactor 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...

Page 21: ...e bottom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the drain Water cooled models have a separate water circuit for the cooling wa...

Page 22: ...as water inside it After the evaporator the refrigerant now a low pressure vapor goes through the suction line back to the compressor where the cycle is repeated Typical Low Side Pressure Air Cooled...

Page 23: ...rvoir and the reservoir is nearly empty switch the master switch to OFF 11 After draining the reservoir as in step 6 wash and rinse the water reservoir 12 Go thru steps 13 18 to sanitize the ice machi...

Page 24: ...reads 5 Inspect the bearing There should be plenty of grease in sight If grease is needed the bearing and breaker should be removed to check the action of the bearing It should rotate freely 6 To remo...

Page 25: ...hey can see At least twice a year remove the bin control sensors from the base of the chute and wipe the inside clean as illustrated Water Sensor The ice machine uses a probe in the water reservoir to...

Page 26: ...f applicable The filter may be cleaned or replaced Clean the condenser the condenser may appear to be clean on the surface but it can still be clogged internally Check with a flashlight from the front...

Page 27: ...ion on removal of these parts see Removal and Replacement 1 Disconnect electrical power to the ice machine 2 Turn off the water supply to the ice machine 3 To remove the auger remove the front and top...

Page 28: ...r can t turn Circuit board has not yet shut it down Unit is shut down Circuit board has shut ice machine down due to high auger motor amp draw Check for cause of high amp draw including bearings gear...

Page 29: ...ator water seal leaks Check base of evaporator and drip pan If the seal leaks shut off the water remove the auger and replace the water seal Check the gear motor for water infiltration Excessive water...

Page 30: ...ere the water sensor plugs into and place the other end in the water The WATER OK should go ON If it does not replace the board 3 Ice sensor Check Is the BIN FULL light OFF If it is OFF and the SERVIC...

Page 31: ...crews from reservoir bracket and remove reservoir from ice maker 9 Reverse to reassemble Water Sensor Float Assembly Locking Tabs Ice Chute Slide Bin Controls to Remove Bin Controls Ice Level Sensors...

Page 32: ...mbly from auger and evaporator Fig 3 7 Service the bearing Check for rust rough spots and damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press is needed...

Page 33: ...r cover from the breaker Note Left hand Threads b Unscrew auger stud from top of auger c Unscrew four 4 Allen head cap screws holding breaker to evaporator d Lift up and remove breaker from evaporator...

Page 34: ...to the bottom of the evaporator slightly past the groove for the snap ring 2 Replace the snap ring and pull the water seal down against it 3 The part of the water seal that rotates with the auger must...

Page 35: ...at in the new evaporator at the old tubing connections 6 Install a new drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auge...

Page 36: ...four 4 cap screws holding the gear motor to the base of the machine remove the gear motor from the machine Note Bench test the gear motor check for oil leaks noise and amp draw To Inspect the Gear Mot...

Page 37: ...Remove the two 2 head bolt from the top end of the fan motor assembly Fig 1 5 Lift up the fan motors and bracket assembly about 1 2 inch and pull out the fan assembly out the right service access hole...

Page 38: ...e a sight glass and or a restricting device such as a Charge Faster installed in it for metering liquid into the low side of the system 1 After a through evacuation shut off the manifold valves and sw...

Page 39: ...GEM0650 0956 1256 A W GEM0650 Wiring Diagram Page 33 Wiring Diagram GEM0650 A W...

Page 40: ...GEM0650 0956 1256 A W GEM0956 Wiring Diagram Page 34 Wiring Diagram GEM0956 A W...

Page 41: ...GEM0650 0956 1256 A W GEM1256 Wiring Diagram Page 35 Wiring Diagram GEM1256 A W...

Page 42: ...GEM0650 0956 1256 A W GEM0655 Wiring Diagram Page 36 Wiring Diagram GEM0655 Air...

Page 43: ...________________________________________ ____________________________________________________________________________________________________________ __________________________________________________...

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