Daikin J Series Manuel de service Page 100

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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.
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