Mitsubishi FDCVA302HENR User Manual

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107
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FDCVA302HENR
Outdoor unit controller failure diagnosis circuit diagram
●
Outdoor unit check points
Check items with the *mark when the power is ON.
0
20
40
60
80
100
120
140
160
180
200
020406080100 120 140
Temperature-resistance characteristics of
A/F thermistor (Tho-AF)
Thermistor resistance (k
Ω)
Temperature (˚C)
T21
T24 T25 T26 T27
M5
M5
T22
PWB4
PWB5
+
L
N
E
TB
1
2
3
Red
White
Orange
Gray
Gray
Brown
Red
White
Y/NG
Y/NG
LED1
Green
LED1
Green
LED2
Red
CM
Red
White
Blac
U
W
T28
T29
T30
Control PCB
(PWB1)
F5(20A)
F6(5A)
FM
01
T1
T2
T8
T9
T4 T10 T11
Noise filter
PCB(PWB3)
T5
T6
CNO2
CNO1
CNQ1
CNG1CNI1CNI3
CNG2CNI2CNI4
CNQ2
CNFAN
CNQ1
CNQ2
When the outdoor
unit fan motor is
abnormal:
(Refer to page 114)
Must be conductive.
When blown, replace with F3 fuse.
Replace also fan motor.
Must be conductive.
When blown, replace PCB.
Power supply check
Measure the power supply at L.N.
(It is normal if it is AC 220/240V)
V
CNW
CNW2
CNA1 CNIPCNA2
A/F thermistor
Inverter PCB
(PWB2)
F3(2A)
F4(2A)
Inspect noise filter.
Must be conductive.
No short-circuit allowed between phases.
Must be conductive.
When fuse is blown,
replace it or check wiring.
No abnormality like
breakage, swell, etc. allowed.
Voltage between terminals
When stopped : 280 V ~ 373 V
During operation : 380 V ~ 390 V
*

Mitsubishi FDCVA302HENR Specifications

General

Brand	Mitsubishi
Model	FDCVA302HENR
Category	Air Conditioner
Language	English