Panasonic OCU-CR200VF5 Service Manual page 26

Troubleshooting for Each Error Code
E 2 3
Indication
1. Ambient temperature sensor connector (2P1) disconnected or contact failure
Probable
2. Ambient temperature sensor failure
Cause
3. Control PCB (CS1-PCB) failed
1. Check if the connector (2P1) on the CS1-PCB is disconnected or loose.
2. Check the resistance value of the ambient temperature sensor, and check if the sensor
Check
and wiring is open or shorted.
[Method of checking]
Refer to "Method of Checking Sensor Characteristics" in the section "Failure Diagnosis".
1. Correct the attachment of the connector (2P1) on the CS1-PCB.
Corrective
2. Replace the ambient temperature sensor.
Action
3. Replace the control PCB (CS1-PCB).
E 2 7
Indication
1. Gas cooler fan motor is abnormal. (Locked, fan disengaged, failed)
Probable
2. Wiring anomaly
Cause
3. PCB failed
This alarm automatically recovers.
If the alarm does not recover automatically, check the following items 1 and 2.
1. Check if the fan motor is abnormal.
(1) Fan motor locked: Cannot turn by hand.
Check
(2) Fan disengaged: Fan has been disengaged or fractured.
(3) Fan motor internal PCB failed
2. Check the wiring.
(1) Check if the connector is correctly connected.
(2) Check if the wiring is not damaged.
1. Replace the fan motor or fan.
(1) Replace the fan motor.
(2) Replace the fan.
Corrective
2. Correct the wiring.
Action
(1) Correct the connection of the connector.
(2) If the wiring is damaged, replace the fan motor.
3. Replace the control PCB （CS1-PCB） or the inverter-PCB (fan motor).
Detected
Ambient temperature sensor anomaly
Content
Detected Gas cooler fan motor anomaly
Content (1st to 9th Trip)
26