Mitsubishi Heavy Industries SCM71ZS-W User Manual

-
99
-
'19 • SCM-SM-276
(ii) Fan motor resistance check
Models SCM71, 80
Measuring point Resistance when normal
Measuring point Resistance when normal
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 V(0-6V)
DC280V⑥ - ④
③ - ④
② - ④
DC15V
⑥-④(Red - Blue) 20 MΩ or higher
③-④(Brown - Blue) 20 kΩ or higher
Models SCM71, 80
DC15V
DC several (0-6V)
Outdoor unit main PCB
GND
DC280V
CNFAN
Red
Blue
Brown
Orange White
FM0
⑥ ④⑤ ③ ②
①
⑥ ④⑤ ③ ②
①
(a)

Inspection of electronic expansion valve
6
White
Yellow
Orange
Blue
Red
54
3
2
1
• Inspection of electronic expansion valve as a separate unit
Measuring point Resistance when normal
(b)

Outdoor fan motor check procedure
②
unit sub
outdoor
unit main
unit main
main
(i)
(ii)
(iii)
(iv)
DC
source
(i) Outdoor unit main PCB output check

Mitsubishi Heavy Industries SCM71ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM71ZS-W
Category	Air Conditioner
Language	English