Mitsubishi SCM71ZJ-S1 User Manual

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76
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'11 • SCM-SM-110
Fan motor resistance check
Models SCM40, 45, 50, 60, 71, 80 Models SCM100,125
Models SCM40, 45, 50, 60, 71, 80 Models SCM100,125
Measuring point Resistance when normal
Measuring point Resistance when normal
DC15V
Notes(1) Remove the fan motor and measure it without power cnnected to it.
(2) If the measured value is below the value when the motor is normal, it means that the fan motor is fauly.
DC several (0‐6V)
DC several V(0‐6V)
DC several V(0‐5V)
DC280V⑥ - ④
③ - ④
② - ④
① - ④
DC15V
Measuring point Resistance when normal
DC several V(0‐6V)
DC several V(0‐5V)
DC280V① - ④
⑤ - ④
⑥ - ④
⑦ - ④
DC15V
Outdoor main PCB
GND
DC280V
⑥-④(Red - Blue) 20 MΩ or higher
20 kΩ or higher③-④(Brown - Blue)
Measuring point Resistance when normal
①-④(Red - Blue) 20 MΩ or higher
20 kΩ or higher⑤-④(Brown - Blue)
CNFAN
Red
Blue
Brown
Orange
White
FM0
⑥ ④⑤ ③ ②
①
⑥ ④⑤ ③ ②
①
DC several (0‐6V)
Outdoor main PCB
DC280V
CNFAN
Red
Blue
Brown
Orange
White
FM0
⑦⑧⑨ ⑤⑥ ③④
①②
⑦⑧⑨ ⑤⑥ ③④
①②
DC15V
GND
(a)

Inspection of electronic expansion valve
6
White
Yellow
Orange
Blue
Red
5 4
3
2
1
• Inspection of electronic expansion valve as a separate unit
Measuring point Resistance when normal
(b)

Outdoor unit fan motor check procedure
②
sub
main
outdoor
main
main
main
(SCM100,125: ⑥)

Mitsubishi SCM71ZJ-S1 Specifications

General

Brand	Mitsubishi
Model	SCM71ZJ-S1
Category	Air Conditioner
Language	English