Service manual

Si04-115 Check
Service Diagnosis 91
6.1.7 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.
"
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)
6.1.8 Inverter Units Compressor/Refrigerant System Check
Check No.15
[Fig.1] [Fig.2]
Compressor/refrigerant system
check
Faulty compressor.
Replace the compressor.
To next step.
(R1967)
YES
NO
Does
the equipment stop
frequency due to startup
error?
∗ Check if there are any damage on refrigerant piping.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.