Daikin 3MXM40N2V1B9 Installer's Reference Manual page 71

2MXM68+3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1D – 2021.03
Green LED-A
(a)
Diagnosis may not apply to some cases. For more details, refer to the service manual.
Diagnosis
Turn the power OFF and back ON, and check the LED
within approximately 3 minutes. If the LED is ON again,
the outdoor unit PCB is faulty.
(a)
Power supply fault.
15 Troubleshooting
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Installer reference guide
71