Models: HP24CO, CS, DO, DS, HK24CO, DO, HM24CO
Electronic Control:
Dixell (XR72CX)
Defrost Style:
Programmed Cycle
Cabinet Lighting:
Lights are controlled through a manual on/off switch as well as through the door
switch.
Evaporator Fans:
Is controlled by the door switch during Cooling Mode
LOAD
COOLING MODE
UPPER
COMPARTMENT***
COOLING MODE
LOWER
COMPARTMENT***
OFF MODE
DEFROST
Compressor
Energized
Energized
De-Energized
De-Energized
Condenser Fan
Energized
Energized
De-Energized
De-Energized
Upper
Evaporator Fan
Energized
De-Energized
De-Energized
De-Energized
Liquid Line
Solenoid Valve
Energized
De-Energized
De-Energized
De-Energized
Lower
Evaporator Fan
Energized
Energized
De-Energized
Energized
Return to
Residential Refrigeration
and Front Venting Commercial Refrigeration
Service Manual
Table 8-16. HP24CO, CS, DO, DS, HK24CO, DO, HM24CO Load Operation Modes
*Defrost is elapsed time initiated and terminated (See controller programs)
**Fan motors are off/delayed after defrost (see controller programs)
***When upper compartment is calling for cooling the AUX illuminates (waits for lower compartment
to call for cooling)
Note:
During upper compartment cooling mode, majority of refrigerant is feed to the upper evaporator to
bring upper compartment down to temperature first. Upon temperature being satisfied, liquid line
solenoid and upper evaporator fan motor turn off.
Electrical System Repair Instructions
Page 8-23