Subzero WOLF ICB WS Series Service Manual page 30

Electronic Control System
Manual Valve Activation Mode
Manual Valve Activation Mode forces the refrigerant valve to feed refrigerant to the desired evaporator, while ener-
gizing the appropriate evaporator fan motor along with the the compressor and condenser. Once initiated, the mode
lasts for five (5) minutes, during which time the chosen evaporator's temperature is displayed at the control panel.
Along with allowing the real time evaporator temperatures to be observed, this mode allows for the activated compo-
nents to be physically inspected for proper operation and electrically tested.
To initiate Manual Valve Activation Mode, the unit must be ON, then press and hold the desired compartment COLD-
ER key and POWER key for ten (10) seconds; the evaporator temperature will then be displayed in the left display
window, the right display window will show the thermistor location code and the appropriate cabinet compartment
icon will be illuminated.
NOTES:
• If the COLDER and POWER keys are pressed and held for less then ten (10) seconds, Diagnostic Mode will be
initiated. This was covered earlier in the section.
• It is possible to toggle through the other temperature readings, as in Diagnostic Mode, but in this case the tem-
perature readings will last for five (5) minutes rather than ten (10) seconds.
• The compressor overload could prevent the compressor from energizing.
• Manual Valve Activation Mode will end five (5) minutes after initiated. It is possible to end this five (5) minute run
time and return to normal operation by switching the unit OFF then back ON. If this is done, note that the elec-
tronic control will observe a three minute minimum compressor OFF time when the unit is switched back ON.
This is to protect the compressor and its electricals.
Figure 3-35. Initiating Refrigerant Valve Activation Mode - Press and Hold Desired COLDER Key and
#7013455 - Revision A - April, 2009
International W
International W
(See Figure 3-35).
POWER Key for 10 Seconds
ine Storage
ine Storage
Press and hold for 10 seconds
3-18
Series
Series
(ICBWS)
(ICBWS)