Panasonic U-4LE1E5, Service Manual, Page: 112 / 133

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5
Mini VRF SYSTEM
Trouble Diagnosis
3. Mini VRF System Alarm Codes
H02 PAM Error
Error Detection Method
Error Diagnosis
Error is detected by over-voltage and overcurrent of DC side.
1.
2.
•
1-1
1-2
1-3
1-2
Check power supply
1-3
Yes
No
1 Power
supply*
Yes
No
2-1
2-2
2-3
Correct connection
2-2
Correct connection
or wiring
2-3
Yes
No
2 PC board
wiring
Yes
No
Extreme voltage fluctuations
Extreme distortion of voltage waveform
Check power supply
2-1
Yes
No
Check power supply
Loose electrical wire connection
Is HIC PC board connector (CN-PAM) poorly connected or
opened with wire?
Replace HIC PC board.
Check not only in the outdoor unit stop mode but in the drive mode.
*
Not satisfied with +10% rated supply voltage
SM830195-00.indb 33 2011/09/30 15:41:34 SM830195-01̲Mini VRF SYS.indb 32 SM830195-01̲Mini VRF SYS.indb 32 2011/12/20 16:32:44 2011/12/20 16:32:44