Trouble Shooting - Mitsubishi PKFY-P63VFM-A Technical & Service Manual

8

TROUBLE SHOOTING

8-1. How to check
Parts name
Room temperature Disconnect the connector then measure the resistance using a tester.
thermistor (TH21) (Surrounding temperature 10:~30:)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
Fan motor (MF) Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:)
FAN
3
Red 1
White
2
3
1
Black
5
Protector
Linear expansion Disconnect the connector then measure the resistance valve using a tester.
valve (Surrounding temperature 20:)
(LEV)
Blue
4
Brown
6
M
2
Yellow
5 3
1
White
Red
Orange
Drain-up machine (DP)
Measure the resistance between the terminals using a tester.
(Optional) (Surrounding temperature 20:~30:)
1
3
Only
PKFY-P63VFM-A
PKFY-P63VFM-A
1
PKFY-P100VFM-A
PKFY-P100VFM-A
1
Drain sensor (DS)
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Optional) (Surrounding temperature 0:~60:)
1
2
3
Only
PKFY-P63VFM-A
PKFY-P63VFM-A
1
PKFY-P100VFM-A
PKFY-P100VFM-A
1
Vane motor (MV) Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:~30:)
4
Orange
M
5
Red
2
Pink
6 1
3
Yellow Brown Blue
Disconnect the connector then measure the resistance using a tester.
Dew prevention
heater (H2)
PKFY-P63VFM-A
PKFY-P100VFM-A PKFY-P100VFM-A
Normal
4.3k"~9.6k" Open or short
Motor terminal or
Relay connector
PKFY-P63VFM-A
99.5" i10%
Red-Black
103.5" i10%
White-Black
Normal
(1)-(5) (2)-(6)
White-Red Yellow-Brown
150k" i10%
Normal
56"~96" Open or short
Normal
0.6k"~6.0k" Open or short
Connector Normal
Brown — Yellow
Brown — Blue
186~214"
Red — Orange
Red — Pink
Normal
2k" i5%
Open or short
PKFY-P63VFM-A
1
Check points
Abnormal
(Refer to the next page for a detail.)
Normal
PKFY-P100VFM-A
62.6" i10%
74.0" i10%
(3)-(5) (4)-(6)
Orange-Red Blue-Brown
Abnormal
Abnormal
Abnormal
Open or short
Abnormal
14
PKFY-P63VFM-A
PKFY-P100VFM-A
1
Abnormal
Open or short
Abnormal
(Refer to the next
Open or short
2
2
page for a detail.)