171
Failure code
Outdoor
digital display
tube: 120,
121-0, 1
Indoor wired
controller: 78,
79
Indoor unit LED status
LED5
Failure description:
Abnormal power supply of the inverter
control board 1 and 2
20 times
Outdoor unit LED status
LED1
LED2
Normal
Normal
1. Model
Failure diagnosis and troubleshooting
Flow Logic III series
Diagnosis
Troubleshooting
2. Abnormity detection method
◆
Check if the supply voltage
is abnormal.
◆
Check if the PTC or relay
contacts or not.
◆
Check if the DC bus voltage
is normal.
◆
Check if the DC power
supply of inverter board is
normal.
3. Abnormity confirmation
conditions
The power supply of inverter
control board is interrupted
instantly.
4. Possible causes
◆
The supply voltage is found
with abnormal fluctuations.
◆
The PTC or relay does not
contact.
◆
The inverter control board is
in poor performance.
Check if the supply voltage is normal
Check if the electrical
cabinet is correctly wired.
Check if the PTC or relay is contacted .
Check if the voltage between P
and N is less than 420V.
Check the rectifier bridge,
electrolytic capacitor, electric
reactor in variable frequency
loop.
Reconnect or re-fix it in
accordance with circuit
diagram.
Adjust or replace PTC or relay.
The DC bus voltage of variable
frequency board is abnormal,
replace the board.
Adjust the power supply.
Y
Y
Y
Y
N
N
N
N
Содержание AWAU-YDV1010-H13
Страница 1: ...SYJS 03 2017 REV A Edition 2017 03 Service Manual Flow Logic III...
Страница 56: ...54 7 Operation range...
Страница 102: ...100 Power module driver board 0151800090B and 0151800090...
Страница 103: ...101 Filter board MHW505A012...
Страница 187: ...Airwell reserves the right to make change without any notice...