Panasonic U-8ME1E8E Service Manual page 163

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