Panasonic U-4LE1R8 Service Manual page 82

3. Mini VRF System Alarm Codes
P05 Power Supply Error
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
supply &
the wiring
1-1
1-2
2 Check the
2-1
outdoor
unit CR
board
2-2
3 Final check
3-1
Sigle-phase outdoor unit HIC board
3
Common in RE1 and RE2
*
4hp, 5hp: Plug-in type
6hp: Fastening screw type
Is the voltage on each of the terminal boards within + 10% of the
rated voltage?
Turn the power back on and check again. Is the alarm triggered
again?
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.
RE1
3-phase outdoor unit HIC board
RE2*
3-42
Mini VRF SYSTEM
Trouble Diagnosis
Yes 1-2
Check for
open circuit and
the voltage at the
No
breaker. if a problem
is found, fix it and
check again.
Yes 2-1
No 3-1
Yes 2-2
No Correct wiring
Replace the outdoor
Yes
unit HIC PC board.
No 3-1
RE2
RE1