Daikin FTXG25EV1BS Service Manual Page 255

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SiEBE12-625 Check
Service Diagnosis 245
6.1.9 Power Supply Waveforms Check
Check No.10 Measure the power supply waveform between pins 1 and 3 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)
6.1.10 Inverter Units Refrigerant System Check
Check No.11
[Fig.1] [Fig.2]
Refrigerant system check
Check for gas leaks.
See the section on insufficient gas
detection.
Conduct the check after operating the
equipment for a sufficient length of time.
Correct the problem.
Conduct vacuum drying.
Replace the refrigerant.
Is the
discharge thermister
disconnected from the
holder?
(R1445)
YES
YES
YES
Is any moisture found in
sight glass.
NO
NO
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