Panasonic S-160PE1R5B Technical Data & Service Manual page 186

4. Mini VRF System Alarm Codes
P05 AC Power Supply Trouble
1. Error Detection Method
• Instantaneous blackout
Zero-cross (waveform input of power supply) error
•
DC voltage charge failure
•
2. Error Diagnosis
Note : The work involved in diagnosing each of the items is extremely dangerous, so turn the power off at the breaker before
performing the tests.
1 Check
the power
1-1
supply &
the wiring
1-2
1-3
1-4
2 Check the
outdoor
2-1
unit CR
PC board
5
3 Check the
3-1
outdoor
unit HIC
PC board
3-2
4 Final check 4-1
■
Outdoor Unit Control HIC PCB
ACXA73-2760* : (U-160PZH2R5)
(Single-phase outdoor unit HIC PC board)
RE1
RE2
NU
W
V
U
P
Is the voltage on each of the
terminal boards within + 10%
of the rated voltage?
Power wiring N-phase is connected.
Power wiring L2 and N are reverse connected. (3-phase only)
Turn the power back on and check again.
Is the alarm triggered again?
The connector CN-RY on the outdoor CR PC board is
connected properly (locked). (3-phase only)
Are the wires (RE1, RE2) from the reactor firmly installed?
Turn the power back on and check again.
Is the alarm triggered again?
There may be a instantaneous blackout failure.
If there is nothing abnormal, see what happens.
1-4 : Single-phase model
Yes
1-2 : 3-phase model
Check for open circuit and the voltage at the breaker.
No
If a problem is found, fix it and check again.
ACXA73-3104* : (U-160PZH2R8, U-180PZH2R8,
U-200PZH2R8, U-224PZH2R8)
(3-phase outdoor unit HIC PC board)
RE2
RE1
NU
W
V
U
P
5-22
Mini VRF SYSTEM
Trouble Diagnosis
Yes Correct wiring.
No 1-3
Yes Correct wiring.
No 1-4
3-1 : Single-phase model
Yes
2-1 : 3-phase model
No 4-1
Yes 3-1
Correct wiring.
No
(connector)
Yes 3-2
No Correct wiring.
Replace the outdoor
Yes
unit HIC PC board.
No 4-1