Column Refrigeration Service Manual
18
3.2 Electrical System (cont.)
Table 3.2. Electrical System Diagnostics/Troubleshooting
PROBLEM
CAUSE
SOLUTION
White Lights not Working
(Door Closed)
(Wine Units Only)
Is the unit in display mode?
Ensure unit is in display mode
Reed switch is closed
Check continuity of reed switch
(magnet on door)
Control Board White LED Illuminated
Green LED (LED6) should illuminate when
call for white lights
Check Power at control board
Connector P13 (Orange to Black) 12VDC
Loose Connection
Check connections
Blue Light not Working
(Door Closed)
(Wine Units Only)
Is the unit in display mode?
Ensure unit is in display mode
Is light intensity adjusted to Blue?
Adjust Intensity to Blue
Reed switch is closed
Check continuity of reed switch
(magnet on door)
Control Board Blue LED Illuminated
Green LED (LED5) should illuminate when
call for blue lights
Check power at control board
Connector P13 (Blue to Black) 12VDC
Loose Connection
Check connections
Hot Gas Valve Solenoid
(Freezer Only)
Is unit in Defrost Mode
Operates only when in defrost mode
Control Board LED Illuminated
Green LED (LED3) should be illuminated
during defrost
Check power at control board
Connector P12 (Yellow to Black) 12VDC
Check power at solenoid
Should be 12VDC
Check Continuity of coil
Coil resistance 11.1 ohms
Dampers
Loose Connection
Check connections
User Interface
No Illumination
Loose Connections
Door alarm activated
Door Open
Close Door
Missing/misaligned door magnet
Align or install door magnet
Defective reed switch
Evaluate and replace if defective