-
103
-
BK
250V 15A
FUSE
1 Phase
220-240V 50Hz
Power Source
BK
L
T2
T1
A
UNIT
EARTH
Y/G
Y/G
3
2
1
WH
N
BK
WH
RD
OR
OR
N_1
P_1
BK
RD
N_1
P_1
DC-N
DC-P
PWB3 (CAPACITOR)
BK
RD
CNG
PWB1 (MAIN)
PWB2 (POWER)
A
EEV
B
EEV
HEATER
CNC
CNT
CNK
CNJ
CND
CNB
FMo
20S
L-1
AC.N
AC.N
AC.L
AC.L
BL
GR
BL
GR
L
AF_L2
AF_L1
OR
OR
V
CM
W
BK
RD
WH
U
Y/G
G2
T3
B
UNIT
CNH
CNG
G3
CNH
CNG
CNP
CNO
WH
WH
BK
BK
BR
3
2
1
CNI
RD
N-1
Tho-D
Tho-C
Tho-A
Tho-R
●
Inspection of resistance value of discharge-
pipe thermistor.
Remove the connector and check the resistance value.
See the section of thermistor characteristics on page 96.
●
Inspection of electronic expansion valve
To test if there is voltage.
(Voltage is only applied to the electronic expansion valve when the valve angle is be-
ing changed.)
Red to white
Red to Orange
Brown to yellow
Brown to blue
If the expansion valve does not operate as shown above, it is defective.
Normal if there is approximately DC 5 V 10 seconds
after the power supply is turned on.
}
●
Display lamp inspection
•
LED 5 (Abnormality display lamp - Red)
•
LED 3 to 4: (Light display for each room -
Green)
ON or flashing: Protection function operating
ON when there is a serial signal being re-
ceived among each of the indoor units.
OFF during ignition, stop (including no
connection), abnormality
*
●
Power supply and serial
signal inspection
1
to
2
: AC220/230/240V
2
to
3
: Normal if the voltage
oscillates between DC 0
and approx. 12V
●
Inspection of inductor conductivity
Remove the connector and check for conductivi-
ty. It must be conductive.
●
Inspect power
transistor.
Remove the fasten
terminal and test
output voltage.
*
Check fuse. There should be conductivity.
CAUTION – HIGH VOLTAGE
High voltage is produced in the control box. Don't touch
electrical parts in the control box for 5 minutes after the
unit is stopped.
u
*
Check these points with the power supply on.
S
SCM40ZF-S, 45ZF-S
Black
Red
White
Yellow/Green
BK
RD
WH
Blue
Yellow
BL
Brown
BR
Gray
GR
Orange
OR
YL
Y/G
Color symbol
LED E
ERROR
(b) Outdoor unit inspection points
Summary of Contents for SRRM25ZF-S
Page 126: ...MEMO ...