Sub-Zero UC-24 series Service Manual page 23

Under Counter (UC-24) Series
Manual Component Activation Mode
Manual Component Activation Mode energizes the cooling system for five (5) minutes, allowing a Service Technician
to check for proper voltage readings at activated components without having to wait for the zone to call for cooling.
To initiate Manual Component Activation Mode the unit must be ON, then press and hold the desired COLDER key
and the POWER key for ten (10) seconds (See Figures 3-41 and 3-42). All cooling functions for that zone will begin
and the zone compartment temperature will be displayed in the left display area of the LCD, with the right display
area showing the thermistor location.
NOTES:
• If a COLDER and the POWER keys are pressed and held for less than ten (10) seconds, Diagnostic Mode will be
initiated. This was covered earlier in the section.
• In the model UC-24C, if the refrigerator COLDER key and POWER key are pressed for ten (10) seconds, the baf-
fle control will energize, but the compressor, condenser fan motor and evaporator fan motor will switch to OFF
mode.
• It is possible to toggle through the other temperature readings as in Diagnostic Mode, but in this case the temper-
ature readings will last for five (5) minutes rather than twenty seconds.
• The compressor overload could prevent the compressor from energizing.
• Manual Component Activation Mode will end five (5) minutes after it is initiated. It is possible to end this five (5)
minute run time and return to normal operation by pressing the POWER key. If this is done, note that the electron-
ic control will observe a three (3) minute minimum compressor OFF time when the unit is switched back ON. This
is to protect the compressor and its electricals.
Figure 3-41. (Model UC-24C) Initiate Manual Component Activation Mode (Freezer Zone Shown) -
Press and Hold Freezer COLDER Key and POWER Key for 10 Seconds
Figure 3-42. (Models UC-24B, UC-24R, UC-24RO) Initiate Manual Component Activation Mode -
Press and Hold COLDER Key and POWER Key for 10 Seconds
Electronic Control System
3-23
#7003933 - Revision B - November, 2007
Press and hold
for 10 seconds
Press and hold
for 10 seconds