Panasonic OCU-CR200VF5 Service Manual page 31
Outdoor type refrigeration unit
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Troubleshooting for Each Error Code
E 6 4
Indication
1. Overload caused excess current exceeding the protection level.
Probable
Cause
2. Input power supply anomaly (Voltage drop)
1. Check the cause of overload operation.
Check if gas cooler fan motor anomaly (E27, E28) exists.
Check
2. Check if any anomaly exists in the power supply.
(1) Check if any problem exists in the wiring connection of power input (loose terminal,
(2) Check if any anomaly existed in the power supply (voltage drop, etc.).
1. Eliminate the cause of overload.
When the gas cooler fan motor anomaly (E27 or E28) is present, refer to the description of
error code E27.
Corrective
Action
2. Eliminate anomaly in the power supply.
(1) Correct the connection of the power input wiring.
(2) Eliminate the cause of power supply anomaly (Repair the power supply unit, etc.).
E 6 6
Indication
1. Overload caused out-of-sync
Probable
2. Compressor motor is abnormal (locked)
Cause
3. Inverter hardware failed
1. Check the cause of overload operation.
Check if gas cooler fan motor anomaly (E27, E28) exists.
Check
2. Check if the compressor motor is abnormal.
Check if the current value is not too high (approx. 10 A in several seconds).
1. Eliminate the cause of overload.
When the gas cooler fan motor anomaly (E27 or E28) is present, refer to the description of
error code E27.
2. Eliminate anomaly in the power supply.
Corrective
(1) Correct the connection of the power input wiring.
(2) Eliminate the cause of power supply anomaly (Repair the power supply unit, etc.).
Action
3. Replace the compressor.
4. Replace the inverter-PCB.
wire breakage, etc.).
Detected
Inverter overload (1st to 9th Trip)
Content
Detected
Inverter out of sync (1st to 9th Trip)
Content
31
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