Discharging Temp. Sensor Td Too Low Protection; Communication With Inverter Module Failure - Haier InoSens MRV SI AU032FSEUA Service Manual

[43] Discharging temp. sensor Td too low protection

If the sensor characteristic
If the teminal of sensor
In cooling mode, when the
indoor unit off if the EEV can't
Check if refrigerant

[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
can't completely close
Measure if voltage of
CN28 on connecting board
changes by multimeter
is correct
Yes
is fixed well
Yes
completely close
No
is too much
Yes
No
Yes
Replace module
No
Replace the sensor
No
Reconnect
Replace of adjustment the
Yes
indoor unit EEV
Yes
Recharge refrigerant
No
Yes
Replace wire
No
Replace connecting board
68
Re-connect