I AM WORKING ON A BCM95 THAT WILL NOT CYCLE THROUGH THE HARVEST CYCLE. I JUST REPLACED THE CONDENSER FAN. FAN WORKS GOOD, COMPRESSOR RUNS, UNIT COOLS DOWN WELL. THE UNIT SEEMS TO BE STUCK IN THE FREEZING CYCLE. AFTER 2 HOURS OF RUNNING, STILL NO MOVEMENT OF THE CAM GEAR OR ICE BAR / PADDLE. ALSO, NO WATER IN THE TRAY. MANUALLY DEPRESSED THE HOLD SWITCH TO CYCLE UNIT. CAN HEAR WATER SOLENOID BUZZ, BUT NO WATER. AM SURE I NEED A NEW SOLENOID, BUT AM CONFUSED WHY THE UNIT DID NOT CYCLE TO ACTIVATE THE WATER SOLENOID IN THE FIRST PLACE. ANY ASSISTANCE WOULD BE GREATLY APPRECIATED.
These units take a full cycle to get to the fill cycle, so you won't get ice on the first cyle unless you manually fill the tray when you first power it on. You may have some air in the water line and need to cycle a few times to fully bleed the air out. Also check the water inlet for debris in the filter screen using a small brass brush, then bleed out air -with water on- while tightening back hose connection avoiding need to bleed while cycling. Lyle
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CM3 Operational Sequence.
From Off, push and release the freeze button.
1. If sump is full,water pump starts.If sump is not full,water valve opens to fill it.
2. Compressor starts when sump is full.Air cooled fan motor starts too.
3. water pump stops early in freeze cycle for 30 seconds.
4. Sump refills after pump starts.
5. In low ambient condition,fan motor may begin to cycle on and off.
6. Freeze continues until water level in sump drops to preset point. Exceptions: SCE275 must fill sump two more times.
7. Fan may shut off before the end of freeze.
8. Harvest begins. Hot gas valve opens,pump stops.
9. Pump restarts, inlet water valve opens to fill and overflow the reservoir.
10. Harvest continues for preset first cycle harvest time.
11. If bin is not full, cycle repeats ( compressor stays on). If bin is full, unit shuts off at the end of harvest.
OK with that out of the way unless you unplugged any wires cleaning the machine should not have caused any problems. First cut off water and pull water supply line from water inlet valve look in the end of valve there is a screen in there it could be stopped up. If the valve screen is not stopped up then put supply water line back on and turn water back on. power the CM3 controller off. push freeze button. now with a voltage meter check at the water inlet valve to make sure you are getting power to the valve.If you are then either valve is stopped up or valve is bad. If you are not getting power to valve then replace the CM3 controller now make sure the bin full light is not on because if it is this will not let controller go back to a freeze cycle.
Is the machine producing ice thick enough to come off the evaporator plate? the machine will try to harvest 3 times before it locks out on long harvest. Harvest cycle: The compressor and hot gas valve are both powered during the harvest cycle. The fan and pump are off at this time. The machine stays in the harvest cycle until the evaporator thermistor senses 52 DEG F. If the bin is not full, the unit goes into another freeze cycle. I would check the Thermistor
So is the unit going into a harvest and not going back to a freeze cycle? dose it dump a batch of ice but wont go back into a freeze cycle? before you reset it have you pulled the front cover to see what code it is giving? any time you have to reset it that means it locked its self out on a fault. if unit freezes and go's into a harvest and dumps the ice but dose not go back into freeze cycle check the door switch when the ice dumps the deflector door opens a magnetic switch which tells the board the harvest has finished and then the freeze cycle begins. Now if there is no ice falling off the plate to open the door then the board will time out and try 3 more times to make ice before it locks it out. the same go's for the harvest.
1. Possible cause. Water leak. Check purge valve, water curtain, sump, sump hose.
2. Air filters clogged. Clean air filters.
3. Dirty condenser. Clean condenser.
4. Restricted location, intake air to hot. Have machine moved.
5. Ice thickness sensor dirty or disconnected. Check ice thickness sensor probe.
6. Water distributor dirty. Remove and clean water distributor.
7. Inlet water valve leaks through during freeze cycle. Check water inlet valve.
8. Connected to hot water. Check for bleed through from missing check valve in building water supply.
9. Incomplete harvest. Check harvest system.
10.High pressure cut out opened. Check fan motor pressure control, check fan motor, check controller using test mode.
11. Fan motor pressure control open. Check fan pressure control.
12. Fan motor not turning. Check fan motor, check fan blade,check controller using test mode.
13.Water pump not pumping. Check pump motor,check controller using test mode.
14. Pump hose disconnected. Check hose.
15. Compressor not operating. check compressor contactor, check controller using test mode.
Check compressor start components, check PTCR resistance and temperature, check compressor voltage, check compressor windings.
16. Low refrigerant charge. Add some refrigerant and restart unit. If cycle time imporves, look for a leak.
17. Hot gas valve leaks through during freeze. Check hot gas valve for hot outlet during freeze.
18. Thermostatic expansion valve bulb loose. Check bulb.
19. Thermostatic expansion valve producing very low or high superheat. Check evaporator superheat, Change TXV if incorrect.
20. Compressor inefficent. Check compressor amp draw, if low and all else is correcy, change compressor.
First check to make sure condenser fan is running during freeze cycle. Now check to make sure condenser coil is clean. Her is all the specks on the machine.
1. Ice production ( 500 at 70/50
2. BTUs per hour ( 7000)
3. Maximum times in Minutes. ( 50 freeze, 14 harvest.
4. Refrigerant charge ( R-404A ) ( A-D series: AC 32oz, WC 20 oz. E series AC 23 oz, WC 14 oz, F series AC 23 oz, WC 13 oz
5. Suction pressure ( PSIG ) 35-37 - end of freeze, 120-125-Peak in harvest.
6. Discharge pressure ( PSIG ) 240-260- 5 min in freeze.
165-175- minimum in harvest.
7. Metering device.( TXV plus distributor, E series and higher have two TXVs. superheat 3 to 15 deg F.
8. Average comp.amps. 10-11 during freeze, 11-12 during harvest.
9. Batch Weight. 6.5-7 lb
10. cycle time, 23 minutes @ 90/70. 19 minutes @ 70/50
DO THE BASICS:
Change the water filter
Add ice machine cleaner and go by the directions.
What should be kept clean?
There are 5 things to keep clean:
1. The outside cabinet & door.
2. The ice storage bin.
3. The condenser.
4. The ice making system.
5. The ice scoop.
The ice storage bin should be sanitized
occasionally. It is usually convenient to sanitize the
bin after the ice making system has been cleaned,
and the storage bin is empty.
A sanitizing solution can be made of 1 ounce of
household bleach and two gallons of hot (950F. -
1150F.) water. Use a clean cloth and wipe the
interior of the ice storage bin with the sanitizing
solution, pour some of the solution down the drain.
Allow to air dry.
How to clean the condenser.
The condenser is like the radiator on a car, it has
fins and tubes that can become clogged. To clean:
1. Remove the kickplate.
2. Locate the condenser surface.
3. Vacuum the surface, removing all dust and lint.
Caution: Do not dent the fins.
4. Replace the kickplate.
1. Clean the machine as explained on the next
2. Turn off the water supply.
3. Drain the water reservoir. See page 24, Spray
Pump Repair and follow the instructions to remove
the pump hose (step 2, bottom hose only).
4. Disconnect the incoming water line at the inlet
5Remove control box cover and turn the timer
into the harvest cycle.
6. With the machine operating, blow air through
the inlet water valve; a tire pump could do the job.
7. Drain pump models should have about 1¤2 gallon
of RV antifreeze (propylene glycol) poured into the
ice storage bin drain.
Note: Automotive antifreeze must NOT be used.
8. Replace control box cover. Switch off and
unplug the machine.
There are three items that may be adjusted: Cube
Size, Harvest Time, and Bin Level. Note: Cube
Size and Harvest Time adjustments should only be
done by a qualified service person.
Cube size control.
The cube size control should only be adjusted to
bring the cubes to the correct shape, the overall
size cannot be adjusted. Try to adjust the cube
size control when the ice machine is in the harvest
cycle, or in the first 10 minutes of the freeze cycle.
1. Open the door and remove the control box
2. Locate the cube size adjustment screw, and to
make fuller cubes, turn the screw clockwise about
1/4 turn. This will make the freezing cycle longer.
3. To shorten the freezing cycle and make cubes
that are not as full, turn the adjustment screw 1/4
4. After the next freezing cycle, the cubes should
have responded to the adjustment, if another
adjustment is required, do it early in the freeze
F - - - - - - - Freeze Cycle
F flashes- - - - Freeze Cycle is Pending
H - - - - - - - Harvest Cycle
H flashes- - - - Manual Harvest
b - - - - - - - Bin is Full
C - - - - - - - Clean Cycle
L - - - - - - - Board Locked
d - - - - - - - Test Mode
O - - - - - - - Off
E - - - - - - - Self Test Failed
1 flashes- - - - Max Freeze - Retrying
1 - - - - - - - Max Freeze Time Shut Down
2 flashes- - - - Max Harvest - Retrying
2 - - - - - - - Max Harvest Time Shut Down
3 - - - - - - - Slow Water Fill
4 - - - - - - - High Discharge Temp
5 - - - - - - - Sump Temp Sensor Failure
7 - - - - - - - Discharge Temp Sensor Failure
8 flashes - - - Short Freeze - Retrying
8 - - - - - - - Short Freeze - Thin ice
All 4 Upper Lights Flashing - Unit Remotely Locked Out
have you got the equipment to change this solenoid valve? you will need a vacuum pump to evacuate the system once you have changed the valve, and the equipment to charge the system with refrigerant (gas).