Outdoor Unit Fan System Check; Power Supply Waveforms Check - Daikin ATXS35EV1B7 Service Manual

Check

5.1.7 Outdoor Unit Fan System Check

Check No.09 DC motor
5.1.8

Power Supply Waveforms Check

Check No.10 Measure the power supply waveform between pins 1 and 2 on the terminal board, and check
the waveform disturbance.
[Fig.1]
5.1.9 Inverter Units Refrigerant System Check
Check No.11
132
Check the outdoor unit fan system.
Outdoor unit fan running?
YES
Outdoor unit fan system
functioning.
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)
Refrigerant system check
Is
the discharge
thermister disconnected
from the holder?
NO
Check for gas leaks.
See the section on insufficient gas
detection.
Fan motor
NO
lead wire connector
disconnected?
NO
Go to Check No. 15.
[Fig.2]
YES
SiBE04-824
YES
Reconnect.
(R7159)
Correct the problem.
Replace the refrigerant.
(R8349)
Service Diagnosis