U-Line 2175R User Manual

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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.