Daikin SUPER MULTI NX G Series Service Manual page 164

Check
6.1.8 Power Supply Waveforms Check
Check No.10
Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check
the waveform disturbance.
 Check to see if the power supply waveform is a sine wave (Fig.1).
 Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2)
[Fig.1]
6.1.9 Inverter Units Refrigerant System Check
Check No.11
155
Refrigerant system check
Is the
discharge pipe
thermistor disconnected
from the holder?
NO
Check for refrigerant leakage.
See the section on refrigerant
shortage detection.
[Fig.2]
YES
SiUS12-928_A
Place the thermistor.
Replace the refrigerant.
(R8380)
Service Diagnosis