Panasonic U-72MF2U9 Service Manual page 180

3. 3WAY Alarm Codes
H08, H27 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
1
2
3
4
5
6
7
8
9
H08, H27
H08 : OIL1 thermistor for the oil of 1st compressor has failure. (OIL1)
H27 : OIL2 thermistor for the oil of 2nd compressor has failure. (OIL2)
This alarm occurs when a connector connection (pins 1 and 2 for 1st compressor, and pins 4
and 5 for 2nd compressor) is open.
Disconnected connector
Check that the connector is securely connected.
(1) Connect the connector.
(2) Correct the connection at connector pins 1 and 2, or pins 3 and 4.
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3WAY VRF SYSTEM
Trouble Diagnosis