Panasonic OCU-CR200VF5 Service Manual page 24

Troubleshooting for Each Error Code
E 0 7
Indication
1. Suction gas temperature sensor connector (2P5) disconnected or contact failure
Probable
2. Suction gas temperature sensor failure
Cause
3. Control PCB (CS1-PCB) failed
1. Check if the connector (2P5) on the CS1-PCB is disconnected or loose.
2. Check the resistance value of the suction gas temperature sensor, and check if the sensor
Check
and wiring are 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 (2P5) on the CS1-PCB.
Corrective
2. Replace the suction gas temperature sensor.
Action
3. Replace the control PCB (CS1-PCB).
E 1 0
Indication
1. Compressor discharge gas temperature went up to 118C or over.
Probable
2. Discharge gas temperature sensor failure
Cause
3. Discharge connector on CS1-PCB connection anomaly.
1. Check the cause of discharge gas temperature exceeding 118C.
(1) Split cycle electronic expansion valve (MOV3) failed.
[Method of checking]
Refer to "Method of Checking Coil Resistance of Electronic Expansion Valve" in the
section "Failure Diagnosis".
(2) Compressor failure, etc.
Check
2. Check the resistance value of the discharge gas temperature sensor, and check if the
sensor and wiring are open or shorted.
[Method of checking]
Refer to "Method of Checking Sensor Characteristics" in the section "Failure Diagnosis".
3. Check if the discharge connector of the CS1-PCB has a connection anomaly.
1. Replace the split cycle electronic expansion valve (MOV3) or the compressor.
(1) Check the attachment condition of split cycle electronic expansion valve (MOV3) along
(2) Check for any abnormal sounds in the compressor, or winding resistance and
Corrective
Action
2. Replace the discharge gas temperature sensor.
3. Correct attachment of discharge connector.
with its coil. In case of anomaly, replace the expansion valve (MOV3).
insulation resistance. In case of anomaly, replace the compressor.
Detected
Suction gas temperature sensor anomaly
Content
Detected Discharge gas temperature anomaly
Content (1st and 2nd Trip)
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