Discharge Pressure Check - Daikin F-Series Service Manual

Check
5.1.7

Discharge Pressure Check

Check No.08
Discharge pressure check
5.1.8 Outdoor Unit Fan System Check (With DC Motor)
Check No.09
5.1.9 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.
[Fig.1]
242
High
YES
Is the stop valve open?
YES
Is the
connection pipe deformed?
YES
Are the heat exchanger and
air filter dirty?
Not dirty
Check the outdoor unit fan system.
Outdoor unit fan running?
YES
Outdoor unit fan system
functioning.
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)
NO
NO
NO
Dirty
NO
Fan motor lead wire
connector disconnected?
NO
Go to Check No. 15.
[Fig.2]
SiBE12-712
Replace compessor.
Open the stop valve.
Replace the pipe installed at
the site.
Clean.
Replace the compressor.
(R3049)
YES
Reconnect.
(R2857)
Service Diagnosis