Check
SiUS071735EA
101
Service Diagnosis
5.2 Indoor Fan Motor Connector Check
Check No.02
1. Turn the power supply OFF.
2. With the fan motor connector disconnected, measure the resistance between each pin, then
make sure that the resistance is more than the value mentioned in the following table.
5.3
Power Supply Waveforms Check
Check No.11
Measure the power supply waveform between No. 1 and No. 2 on the terminal block, and check the
waveform disturbance.
Check if the power supply waveform is a sine wave (Fig.1).
Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2).
Measuring points
Judgement
White - Blue
1 M
Ω
or more
Orange - Blue
100 k
Ω
or more
Brown - Blue
100
Ω
or more
Red - Blue
100 k
Ω
or more
White
Orange
Brown
Blue
—
—
Red
FG
Vsp
Vcc
GND
—
—
Vdc/Vm
X8A
(R25080)
Fig.1
Fig.2
Summary of Contents for FDMQ-R Series
Page 12: ...SiUS071735EA 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiUS071735EA 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 120: ...Check SiUS071735EA 109 Service Diagnosis 15 18 24 class R25105 1 2 3 4 Multimeter...
Page 122: ...Check SiUS071735EA 111 Service Diagnosis 15 18 24 class R20704 W V U DC_P1 DC_N1...
Page 140: ...Piping Diagrams SiUS071735EA 129 Appendix RX24RMVJU A 3D092249A...
