Symptom: The Unit Is Not Heating Or Cooling As Expected; Symptom: Water Leakage; Symptom: Electrical Leakage; Symptom: Unit Does Not Function Or Burn Damage - Daikin 2AMXM40M4V1B9 Installer's Reference Manual

15 | Troubleshooting

15.3.2 Symptom: The unit is NOT heating or cooling as expected

15.3.3 Symptom: Water leakage

15.3.4 Symptom: Electrical leakage

15.3.5 Symptom: Unit does NOT function or burn damage

15.4 Solving problems based on LED behaviour

15.4.1 Fault diagnosis using LED on outdoor unit PCB

Installer reference guide
66
Possible causes
Wrong connection of the electrical
wires
Gas leakage
Marks on the wiring and piping do NOT
match
Possible causes
Incomplete thermal insulation (gas and
liquid piping, indoor portions of the
drain hose extension)
Improperly connected drainage
Possible causes
The unit is NOT earthed correctly
Possible causes
The wiring was NOT performed in
accordance with the specifications
LED is...
flashing
ON
OFF
Connect the electrical wires correctly.
Check for gas leakage.
Marks on the wiring and piping (room A,
room B, room C, room D, room E) for
each indoor unit MUST match.
Make sure the thermal insulation of the
piping and the drain hose is complete.
Secure the drainage.
Check and correct the connection of the
earth wiring.
Correct the wiring.
Diagnosis
Normal.
▪ Check the indoor unit.
▪ Turn the power OFF and back ON, and check the LED
within approximately
If the LED is ON again, the outdoor unit PCB is faulty.
1 Supply voltage (for power saving).
2 Power supply fault.
3 Turn the power OFF and back ON, and check the
LED within approximately
If the LED is OFF again, the outdoor unit PCB is
faulty.
Corrective action
Corrective action
Corrective action
Corrective action
3 minutes.
3 minutes.
2(A)MXM40+50 + 2(A)MXF40+50
R32 Split series
4P600463-3D – 2021.03