Panasonic U-4LE1E5 Service Manual page 119

4. Mini VRF System Alarm Codes 3. Mini VRF System Alarm Codes
H01 Primary Current (Input) Detect of Overcurrent
1. Error Detection Method
• Primary current effective value detected overcurrent (trip current value).
Trip current value
Single-phase model
Heating
Cooling
2. Error Diagnosis
1 Power
1-1 Not satisfied with ±10% rated supply voltage
supply*
1-2 Extreme voltage fluctuations
1-3 Extreme distortion of voltage waveform
1-4 Instantaneous blackout may sometimes occur.
2 PC board
Has FUSE 1 blown?
2-1
wiring
Check the electrical conduction with tester.
2-2 Loose electrical wire connection
2-3 Replace CR board.
* Check not only in the outdoor unit stop mode but in the drive mode.
(for single-phase outdoor unit PC board)
hp = horsepower
4 hp 5 hp 6 hp
23.0A 26.5A 30.0A
22.0A 25.0A 28.0A
FUSE 1
Trip current value
3-phase model 4 hp
Heating 10.5A
Cooling 10.5A
(for 3-phase outdoor unit PC board)
5 - 31
Mini VRF SYSTEM
Mini VRF SYSTEM
Trouble Diagnosis
Trouble Diagnosis
hp = horsepower
5 hp 6 hp
12.0A 14.0A
12.0A 14.0A
Yes Check power supply
No 1-2
Yes Check power supply
No 1-3
Yes Check power supply
No 1-4
Yes Check power supply
No 2-1
2-3
Yes
No 2-2
Yes Correct wiring
No 2-3
FUSE 1
5