H08, H27, H28 Alarm - Panasonic U-8ME1E81 Service Manual

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
3-21
2WAY SYSTEM
Trouble Diagnosis
1
2
3
4
5
6
7
8