Mitsubishi Electric MU-A18WV-E1 Service Manual page 27

10-2. Trouble criterion of main parts
MU-A18WV - MU-A24WV -
E1
Part name
Discharge temperature
thermistor(RT62)
MU-A30WV
Ambient temperature
thermistor(RT63)
MU-A30WV
Compressor
(MC)
INNER
PROTECTOR
160i 5: OPEN
90i10: CLOSE
Outdoor fan motor(MF)
INNER
PROTECTOR
MU-A18WV
135i 5: OPEN
w
( 87i15: CLOSE )
MU-A24WV
130i 5: OPEN
w
( 83i15: CLOSE )
MU-A30WV
135i 5: OPEN
w
( 87i15: CLOSE )
LEV(Expansion valve)
MU-A30WV
w Reference value
MU-A30WV -
E1
Check method and criterion
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
(Part temperature 0˚C ~ 40˚C)
Normal
120 k" ~ 800k"
Measure the resistance with a tester.
(Part temperature –10˚C ~ 40˚C)
Normal
5 k" ~ 60 k"
Measure the resistance between the terminals with a tester.
(Part temperature –10˚C ~ 40˚C)
Terminal
MU-A18WV
1.59 " ~ 1.95 "
C – R
C – S 2.65 " ~ 3.24 "
Measure the resistance between the terminals with a tester.
(Part temperature –10˚C ~ 40˚C)
Color of
lead wire
MU-A18WV
WHT – BLK 103 " ~ 126 "
89 " ~ 120 "
BLK – RED
–
BLK – YLW
–
YLW – RED
Measure the resistance with a tester.
(Part temperature : –10˚C ~ 40˚C)
Color of lead wire
WHT – RED
RED – ORN
41.0 " ~ 49.0 "
YLW – BRN
BRN – BLU
E1
Abnormal
Open or short-circuit
Abnormal
Open or short-circuit
Normal
MU-A24WV MU-A30WV
0.71 " ~ 0.87 " 0.56 " ~ 0.71 "
1.45 " ~ 1.77 " 1.43 " ~ 1.76 "
Normal
MU-A24WV MU-A30WV
63 " ~ 77 " 55 " ~ 68 "
–
79 " ~ 96 "
–
49 " ~ 61 "
–
22 " ~ 29 "
Abnormal
Normal
Open or
short-circuit
27
Figure
WHT C
P
AUX
Abnormal
S
Open or
short-circuit
RED
MU-A18/A24WV
MAIN
AUX
P
Abnormal
BLK
Open or
MU-A30WV
short-circuit
MAIN
AUX.1 AUX.2
BLK YLW
6
WHT
1
RED
4
ORN
P :INNER PROTECTOR
~
MAIN
R
BLK
RED ORN WHT
P
C
RED ORN WHT
LEV