Wolf Sub-Zero ICB400 Series Service Manual page 29

Electronic Control System
WINE STORAGE TROUBLESHOOTING INPUT OPERATIONS
The following few pages explain troubleshooting input operations performed at the control panel, namely: Diagnostic
Mode, Manual Valve Activation Mode and Temperature Log Recall.
Diagnostic Mode
Initiating Diagnostic Mode allows the Service Technician to observe real-time temperature readings from all thermis-
tors without temperature averaging. If errors were registered by the thermistors or the defrost system, "Error Codes"
will also be displayed during diagnostic mode.
To initiate Diagnostic Mode, the unit must be ON, then press and hold either COLDER key, and press the POWER
key, then release both keys
time temperature of the thermistor, the right display area will show the thermistor location code, and all LCD indica-
tors will illuminate. Pressing either COLDER key or either WARMER key while in Diagnostic Mode will toggle to the
next or previous thermistor location, respectively.
NOTE: If the COLDER and POWER keys are pressed and held for ten (10) seconds, Manual Valve Activation Mode
will be initiated (this is covered later in the section).
NOTE: Diagnostic Mode will end ten (10) seconds after the last key stroke.
Figure 3-28. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, Then the POWER Key
Figure 3-29. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key
Figure 3-30. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key
Figure 3-31. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key
7011544 - Revision A - November, 2008
International W
International W
(See Figure 3-28). If no error codes are registered, the left display area will show real-
(See Figure 3-29, 3-30 and 3-31)
("UE" Indicates Upper Evaporator)
("LE" Indicates Lower Evaporator)
("UP" Indicates Upper Compartment)
("LO" Indicates Lower Compartment)
ine Storage
ine Storage
(ICB400)
(ICB400)
3-16
Series
Series