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#7040748 - Revision A - September, 2016
MODEL UW-24
MODEL UW-24
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 compressor and condenser. Once initiated, the mode
lasts for five minutes, during which time the chosen evaporator’s temperature is displayed on 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 10 seconds; the evaporator temperature will then be displayed in the left display win-
dow, the right display window will show the thermistor location code and the appropriate cabinet compartment icon
will be illuminated. (See Figure 2-34).
NOTES
:
• If the COLDER and POWER keys are pressed and held for less then 10 seconds, Diagnostic Mode will be initiat-
ed.
• 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 minutes rather than seconds.
• The compressor overload could prevent the compressor from energizing.
• Manual Valve Activation Mode will end five minutes after initiated. It is possible to end this five minute run time
and return to normal operation by switching the unit OFF then back ON. If this is done, note that the electronic
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 2-34. Initiating Refrigerant Valve Activation Mode - Press and Hold Desired COLDER Key and
POWER Key for 10 Seconds
Press and hold for 10 seconds
