Panasonic U-8ME1E81 Service Manual page 163

4. 2WAY Alarm Codes
H08, H27, H28 Alarm
Alarm code H08, H27, H28
Alarm meaning Trouble (open circuit) with the oil sensor (connection) at compressor 1, compressor 2,
or compressor 3
Alarm conditions This alarm occurs when a connector connection (pins 1 and 2 for compressor 1, pins 4
and 5 for compressor 2, and pins 7 and 8 for compressor 3) is open.
Probable cause Disconnected connector
Check Check that the connector is securely connected.
Correction (1) Connect the connector.
(2) Correct the connection at connector pins 4 and 5.
Example —
Notes
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2WAY SYSTEM
Trouble Diagnosis
6