Airwell VVFA Series Service Manual page 56

[43] Discharging temp. sensor Td too low protection
If the sensor characteristic
In cooling mode, when the
indoor unit off if the EEV can't
[46] Communication with inverter module failure
Check if communication wire
between connecting board and
module is connected normally
In cooling mode, when the
indoor unit off if the EEV
CN28 on connecting board
changes by multimeter
is correct
Yes
If the terminal of
sensor is fixed well
Yes
completely close
No
Check if refrigerant
is too much
Yes
can't completely close
No
Measure if voltage of
Yes
Replace module
No
Replace the sensor
No
Replace of adjustment the
Yes
indoor unit EEV
Yes
Recharge refrigerant
No
Yes
Replace wire
No
Replace connecting board
54
Reconnect
Re-connect