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SiBE12-933_A
Check
Service Diagnosis
217
5.1.6 Discharge Pressure Check
Check No.08
5.1.7 Outdoor Unit Fan System Check (With DC Motor)
Check No.09
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.
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)
(R7158)
High
Discharge pressure check
Is the stop valve open?
Is the connection pipe
deformed?
Are the heat exchanger
and air filter dirty?
NO
NO
NO
YES
YES
YES
Not dirty
Dirty
Replace the compressor.
Open the stop valve.
Replace the pipe installed at
the site.
Clean.
Replace the compressor.
(R7159)
Check the outdoor unit fan system.
Outdoor unit fan running?
YES
Outdoor unit fan system
functioning.
NO
NO
YES
Fan motor lead wire
connector
disconnected?
Go to
Check No. 15
.
Reconnect.
[Fig.1]
[Fig.2]