Power Supply Waveforms Check - Daikin FTX25JVEA9 Service Manual

Troubleshooting - Outdoor Unit Related
3.4.13

Power Supply Waveforms Check

Check No.13 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check
the waveform disturbance.
"
"
[Fig.1]
3.4.14 Total Operating Current Check
Check No.14
308
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)
Clamp A
Clamp B
n Clamp the
connecting wires
down with clamps A
and B as shown in
the diagram.
[Fig.2]
n
When connecting the power
supply cord, do not peel back
more than 30mm of the cable
insulation from the power supply
terminal board, in order to be
able to pull the connecting
terminal board around.
Si18-201
Service Diagnosis