Solenoid Valve (Cwb1760Fd); Display Error Codes - EdgeStar CWB8420DZ Service Manual

The foam blocks at the two sides of evaporator are lost or damaged. Replace the foam.
The temperature sensor has failed.
The compressor operates continuously & independent from the set temperature.
At the same time the condenser fan motor does not operate. The POWER PCB has failed
and must be replaced.
NOTE: Before starting the services as above, please unplug the appliance and open the
door for more than 24 hours to let the ice on the evaporator melt completely.

9.4.12 Solenoid Valve (CWB1760FD)

If the left zone is too low a temperature or freezing and the right zone is not cooling test the
solenoid valve:

Remove the power leads from the solenoid.

Connect the solenoid valve directly to external power – a clicking sound should come from
the valve as you disconnect and reconnect power. If not, the valve is defective.

If the right zone of the unit starts cooling it means the solenoid valve is OK. Replace the
Power PCB. Otherwise replace the solenoid valve.

9.5 Display Error Codes

9.5.1 "E1"
"E1" indicates the corresponding air temperature sensor is an open circuit. It may be
caused by the following reasons:
The temperature sensor is defective – Replace the thermistor.
-
The Power PCB is defective – Replace the Power PCB.
-
The Control PCB is defective – Replace the Control PCB.
-
The connecting wire is defective ( e . g . screw has made the wires short circuit) –
-
Reroute a new wire.
The temperature sensor wire is loose or out of the terminal on the Power PCB. –
-
Reconnect wire.
The sensor wire is not connected with the internal wire. – Reconnect wire.
-
9.5.2 "E2"
"E2" indicates the corresponding air temperature sensor is a short circuit. It may be caused
by the following reasons:
The temperature sensor is defective – Replace the thermistor.
-
The Power PCB is defective – Replace the Power PCB.
-
The Control PCB is defective – Replace the Control PCB.
-
The connecting wire is defective ( e . g . screw has made the wires short circuit) –
-
Reroute a new wire.
9.5.3 "E3"
"E3" indicates the defrost sensor in the evaporator is an open circuit. It may be caused by
the following reasons:
The temperature sensor is defective – Replace the thermistor.
-
The Power PCB is defective – Replace the Power PCB.
-
The Control PCB is defective – Replace the Control PCB.
-
The connecting wire is defective ( e . g . screw has made the wires short circuit) –
-