Airwell AWAU-YDV1010-H13, Service Manual

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164
Failure code
Outdoor
digital
display tube:
115-0,1
Indoor wired
controller:
73
Indoor unit LED status
LED5 Failure description:
DC over-voltage of module 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 power voltage
is too high and results in over
voltage after rectification;
◆
Check if the cabinet is
correctly wired.
3. Abnormity confirmation
conditions
Raise failure alarm when
power voltage>DC642V.
INV control board recovers
automatically when voltage
<DC642V.
4. Possible causes
◆
Incorrect connection may
result in over voltage alarm;
◆
High power voltage may
result in over voltage.
Check if the supply voltage is normal.
Check if the cabinet is wired correctly.
Test if the voltage of DC bus is above 642V.
Replace and compare the
neighboring electrical cabinet
by troubleshooting.
Rewire the cabinet in accordance
with wiring diagram.
The detection circuit of variable
frequency board is damaged.
Replace the board.
Adjust the supply voltage.
Y
Y
Y
N
N
N