U-Line 2175WCOL Service and Repair, Excessive Frost on evaporator, Noise, Refrigerator too warm

Section 3 - Service and Repair

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. 1 means ON and 0 means OFF.

To view the actual refrigerator (T1) temperature, hold the WARMER key until the actual temperature is displayed. To view the actual thermistor readings for 2-4, 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.

In the general section the methods to enter some other service modes are available.

TROUBLESHOOTING:

Error Codes

E1, E2, E7,
E8 & 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.
E3	This will be accompanied by a beep every minute. This
	signals that the door (or bottom drawer) has been left
	open for longer than 20 minutes. Close the door to
	reset. If the light and display do not go off when the
	door is closed, check to make sure the magnet is
	positioned properly.
E5	This signals that the unit has been above set-point for
	more than twelve hours by at least 10°. If the unit was
	just plugged in, leave for 24 hours to see if the problem
	is corrected. If it is not corrected, it is most likely a
	refrigeration system issue.
E6	This signals that the refrigerator section has been at
	least 10° below set-point for at least twelve hours. This
	would most likely be caused by a bad relay and the
	circuit board.
E10	This will be accompanied by a beep every minute. This
	signals that the top drawer has been left open for
	longer than 20 minutes. Close the door to reset. If the

light and display do not go off when the door is closed, check to make sure the magnet is positioned properly.

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

Excessive Frost on evaporator

Force a defrost cycle via the keypad input or shut down unit and thaw if frost is very thick. If the evaporator clears, it was due to some type of abnormal operation. If the unit will continue to be used in this manner, the defrost length can be lengthened in the service menu to prevent future issues. Extending this length may be detrimental to the refrigerator temperature. During very long defrosts the temperature may raise higher than desired.

During the forced defrost no heating will occur. This is just a prolonged off cycle.

Noise

Some noise is normal such as a hum from the fans/compressor.

Display is showing something other than “SP (38)” or “ER.”

Push one of the keys to see if the display is reset.

Turn unit on and off via the display pad.

Unplug unit, wait one minute and plug back in. If any of these steps returns the unit to operation, the unit was probably accidently entered into a service mode.

Display is showing a random snaking of characters or a degree symbol is flashing.

The unit is in a special showroom mode. Hold the COLDER key and press the LIGHT key three times to exit.

Display not illuminating but unit operating

First try to plug and unplug the unit. If the display still does not illuminate there is a four-wire pin connector running from the main board in the base to the display board. One of the wires is disconnected or damaged.

Unit is not operating—no cooling—no fans.

Unplug unit and plug back in. If main boards beeps when plugging in the unit then this is most likely a system problem, not a board issue.

If board does not beep when plugging in the unit, check the power supply to ensure the outlet is working. Also, check the fuse on the circuit board.

Refrigerator too warm

Check the actual refrigerator temperature. If set to 38°F, the actual temperature should be between 36°F and 40°F during normal operation. Recent door openings, product loading or defrost cycles will push the temperature higher for short time periods.

3-16