Mitsubishi Heavy Industries SRK60ZJX-S, Technical Manual

Page: 209 / 272

-
208
-
'10 • SR-T-091
FMo
1
2
3
4
5
6
＊
LED1
Red
LED1 (Red) check
Light continuously :Normal
Stays OFF : Anomalous
(Refer to page 32)
EEV
T2 T1
S
V
W
U
Red
White
Black
PWB ASSY(MAIN)
+ +
R
TRANSISTOR
POWER
CIRCUIT
SWITCHING POWER
W
V
U
P
NU
NV
NW
CNTH
CNFAN
+
ACTIVE
FILTER
UNIT
S-2
PWB ASSY(SUB)
S-1
CNSUB
CNMAIN
S
IN
R
IN
R
OUT
G1
1
2
3
4
1
2
3
4
1 2 3 4 5 6
2
R
O
S
O
(Noise filter)
N
L
250V 20A
F10
250V 10A
2
1
N
3
CN20S
C-2
T1
T2
TH1 TH2 TH3
CM
L
20S
CNEEV
1 2 3 4 5 6
Yellow Orange
Black
White
Black
White
Brown
Yellow/Green
Yellow/Green
Yellow/Green
White
Noise filter check:
There should be continuity.
There should be no shorts between phases.
F3 250V 1A
F2 250V 20A F8 250V 20A
Power supply check
Measure the power supply at L.N.
(It is normal if it is AC 220-240V.)
Must be conductive.
When fuse is blown,
replace it or check wiring.
DC Reactor continuity
Check: 50m or higher,
less than 100m
Ω
.
Power transistor module check:
Is there a short circuit, open
circuit or damage?
(See 53 page for the check
procedure.)
Fuse check: There should be continuity.
If faulty, replace the control PCB.
When the outdoor
unit fan motor is
anomalous:
(Refer to page 104)
Models SRC40,50,60ZIX-S
●
Outdoor unit check points
Check items with the *mark when the power is ON.
(6) Outdoor unit controller failure diagnosis circuit diagram
Must be conductive.
When blown, replace with F3 fuse.
Replace also fan motor.
F1
250V 2A
'09•SRK-DB-087D
(11) Outdoor unit inspection points
20ZJX-S, 25ZJX-S, 35ZJX-S
242.