Viking DFUW244CL, Service Manual

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PROBLEM POSSIBLE CAUSE CORRECTION
E2 error code along with audible alarm (6 /per
min.) - condenser low amp
Condenser fan motor wire disconnected.
Faulty condenser fan motor.
Faulty power board. Check wiring to fan motor
Replace condenser fan motor.
Replace power board.
E3 error code along with audible alarm (6 /per
min.) - upper thermistor
Disconnected thermistor plug
Shorted thermistor
Faulty thermistor Check connection on rear of user interface board.
Ohm and replace if necessary.
Ohm and replace if necessary
E4 error code along with audible alarm (6 /per
min.) - lower thermistor
Disconnected thermistor plug.
Shorted thermistor.
Faulty thermistor. Check connection on rear of user interface board.
Ohm and replace if necessary.
Ohm and replace if necessary
Service Diagnostics Mode is not engaging WARMER keypad was not depressed and held
firmly while pressing the COLDER keypad 4
times within 5 seconds.
Depress and hold WARMER keypad firmly
while pressing the COLDER keypad 4 times
within 5 seconds. Audible beep will sound at
every key stroke
Service Diagnostics Mode is not disabling WARMER keypad was not depressed and held
firmly while pressing the COLDER keypad 4
times within 5 seconds.
Depress and hold WARMER keypad firmly
while pressing the COLDER keypad 4 times
within 5 seconds. Audible beep will sound at
every key stroke
Service Diagnostics Mode is automatically
disabled After 5 minutes of no keypad functions, the
Diagnostics Mode will automatically disable
Re-enter the diagnostics mode to continue.
Compartment temperature to warm. Frosted evaporator coil.
Compartment fan not working
Return air damper not closing-tape securing
damper has come loose.
Heater/fan assembly not disabling
Air leak at rear of cabinet.
Bad door gasket / seal.
Divider seal on door is by-passing air.
Open or out of range thermistor.
Broken or loose connection on communication
cable, U/I board, or main power board.
Older version of software is installed.
Replace, current version is 1.9
Replace compartment fan.
Remove divider and repair.
Faulty main power board. Replace
Remove back panel to make sure all wire and
tubing portals are properly sealed. Seal using
permagum or RTV.
Check for worn or torn gasket - replace.
Gasket pulling away from inner door pan - seal
with superglue or RTV.
Inspect and replace door divider seal if needed.
Ohm and replace thermistor if needed
Check cable connections at U/I board and main
power board.
Check wire continuity from one end of the com
-
munication cable harness to the opposite - OL
reading means a broken harness - replace.
A close visual inspection of all terminal block
pins could reveal any broken connections.
Compartment temperature to cold Bad fan/heater assembly
Check heater continuity - Resistance of heater/
fan assembly should be 7.5 Ohms @70
°
F.
61
11.1 Problem / Cause / Correction, continued.
2010 - Viking Preferred Service SMR-0005