Troubleshooting - Mitsubishi Electric PLFY Series Technical & Service Manual

10

TROUBLESHOOTING

10-1. HOW TO CHECK THE PARTS
PLFY-P20VCM-E.TH
PLFY-P20VCM-E .TH PLFY-P25VCM-E
1
Parts name
Thermistor (TH21)
Disconnect the connector then measure the resistance with a tester.
(Room temperature
(At the ambient temperature 10:~30:)
detection)
Thermistor (TH22)
(Pipe temperature
detection/ Liqid)
Thermistor (TH23)
(Pipe temperature
detection/ Gas)
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20:~30:)
White
M
Orange
Red
Blue Yellow
Fan motor (MF)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)
P
BLK YLW BRN RED ORN
BLU
WHT
: Thermal fuse 145˚C ± 2˚C
P
Linear expansion
Disconnect the connector then measure the valve resistance with a tester.
valve (LEV)
Blue
Brown
M
Yellow
White
Red
Orange
Drain pump (DP) Measure the resistance between the terminals with a tester.
(At the ambient temperature 20:~30:)
Relay
connector
Yellow
1
2
Yellow
Drain sensor (DS)
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0:~60:)
1
2
3
PLFY-P25VCM-E.TH
Normal
4.3k"~9.6k" Open or short
Connector Normal
Red — Yellow
Red — Blue
Red — Orange
Red — White
PLFY-P20VCM-E
WHT-BLK 302"~327"
BLK-BLU 91"~100"
BLU-YLW 38"~42"
YLW-RED
265"~288"
RED-BRN
Normal
White-Red Yellow-Brown Orange-Red
150k" i10%
Normal
290" Open or short
Normal
0.6k"~6.0k" Open or short
PLFY-P32VCM-E.TH
.TH PLFY-P32VCM-E
1
Check points
Abnormal
Refer to the next page for the details.
Abnormal
300" Open or short
Normal
PLFY-P25VCM-E PLFY-P32VCM-E
(1) (1)
390"~423" 378"~409"
82"~90" 157"~170"
28"~32" 44"~49"
158"~172" 306"~332"
Blue-Brown
Abnormal
Abnormal
Refer to the next page for the details.
18
PLFY-P40VCM-E.TH
.TH PLFY-P40VCM-E
1
Abnormal
PLFY-P40VCM-E
(1) (1)
312"~338"
137"~149"
Opened or
44"~49"
short-circuited
296"~321"
Abnormal
Refer to the next
page for the details.
Open or short
.TH
1