U-Line 2175WCOL Operation, Service and Repair, CLR2160, Error Codes, General, Thermistor Outage

Section 3 - Service and Repair

OPERATION

CLR2160

GENERAL

Upon initial startup, this unit will enter mode number 5 which is a three-minute water fill regardless of the thermistor temperatures. This only occurs when the initial startup is caused by a power-up of the main board.

Following the three-minute water fill, the unit moves into mode 1 which is the freezing mode. In this mode the water is pumped from the sump trough over the ice maker grid by the circulation pump. This mode typically lasts 10-20 minutes and is regulated by the temperature of the thermistor mounted near the dryer (thermistor 4).

At the conclusion of the freeze cycle the unit will enter mode 2 which is the ice harvest. This harvest can last up to three minutes. During this mode the water trough also refills.

Before the next cycle begins, the custom electronic board determines whether the bin is full. A temperature below 34°F, or a temperature below 35°F for at least one hour will stop the unit from producing ice. The ice-making will always stop at the conclusion of a harvest cycle. It will never stop in the middle of a cycle.

The custom electronic board continuously monitors the optional P60 pump to ensure the drain line is not becoming restricted. In the event of a drain line obstruction, the display interface will show “P1.” If the drain remains restricted the unit will stop ice production until the drain clears. In the event of a partially restricted drain, reduced ice rate will be noticed as the unit continuously turns on and off to eliminate any chances of overfilling the unit with water. If no pump is used the pink jumper needs to be connected to the power cord in its place.

A cleaning mode is available through the user interface by using the key sequence described in the Controls Section. The cleaning mode lasts about 45 minutes, at which point the unit will sit idle for another 15 minutes. During this time the display will show “CL.” At the conclusion of the cycle the unit will automatically turn back on.

THERMISTOR OUTAGE

In the event that a thermistor fails, the unit will stop all functions and display “ER” on the user interface. The exact error can be accessed via the service mode.

SERVICE

The CLR2160 model uses four relays and two thermistors. There is a variety of built-in servicing features to aid in diagnosing the root problem associated with a unit.

To check to see which relays are currently operating, hold the COLDER key and press the ON/OFF key three times. When

entering the sequence, keep the COLDER key pressed until you completely release the ON/OFF key for the third time. The display will cycle through a series of numbers to tell which relays are energized. For example, if the unit was in ice-making mode the display would show 11 20 31 40 51 60 70. The first number is the relay number. In the second number, “1” means on and “0” means off. The relay information can be found in the Control Section.

Each relay can also be turned on and off individually to determine whether or not the board and component are operating. If a board is suspected of not operating correctly you can run through this sequence to ensure each component is turning on and off through the board correctly. Go into service mode and choose option #22. This will cycle every relay on and off showing 10 11 20 21 …. If a

component fails to turn on when the relay does, you can verify if there is voltage present by using a voltmeter to check the board output.

To view the actual thermistor readings, hold the WARMER and COLDER keys for about five seconds. The display will cycle through the three thermistors and their temperatures. If a thermistor is unused in a unit it will show a “0” reading. The CLR2160 uses thermistors 2 and 4. For thermistor 4 the display will only show up to “99.” In the event the temperature is higher than this the display will show a flashing “99.”

TROUBLESHOOTING

Error Codes

E1, E2, E9	Bad thermistor errors. Replace thermistor. Check
	for thermistor errors by accessing “View thermistor
	# status (2,19, 20, or 21).” If the error code is
	repeated, the thermistor is open or shorted. If a
	temperature is displayed, the thermistor is not
	defective.
P1	Pump circuit is detecting a drain problem. Consult a
	plumber to resolve the issue. If unit does not have a
	P60 installed, then the jumper wire is missing in
	place of the pump.

Any other error messages will not affect the operation of the CLR2160 model.

After checking the errors be sure to clear the error log by performing service option 12

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