Mitsubishi Electric CITY MULTI PEFY-P-NMLU-E Series Technical & Service Manual

13
7
TROUBLE SHOOTING
7-1. How to check the parts
Room temperature
thermistor
(TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Trans
Fan motor
Fan motor
Linear expansion
valve
Disconnect the connector, then measure the resistance using a tester.
(Sorrounding temperature 10°C~30°C[50°F~86°F])
Disconnect the connector and measure the resistance using a tester.
Measure the resistance between the terminals using a tester. (at 20˚C[68°F])
Measure the resistance between the terminals using
a tester.
Disconnect the connector then measure the resistance valve using a tester.
Drain Pump
(Drain water lift up kit)
Drain sensor
(Drain water lift up kit)
Disconnect the connector then measure the resistance
valve using a tester.
(Sorrounding temperature 20°C~30°C[68°F~86°F])
(Refer to the thermistor characteristic graph)
Normal
4.3kΩ~9.6kΩ
Abnormal
Open or short
CNT(1)-(3)
Normal
App.15Ω
CN3T(1)-(3) App.4Ω
Abnormal
Open or short
Motor terminal
or
Relay connector
Normal
P40· 50 P63
Abnormal
Gray-Orange 68.8 Ω
Open or short
Gray-Black
Gray-Brown
Gray-Blue
53.73 Ω
59.92 Ω
74.17 Ω
47 Ω
37.29 Ω
39.81 Ω
49.8 Ω
P71
32.9 Ω
27.56 Ω
30.64 Ω
38.31 Ω
P80
33.3 Ω
27.1 Ω
28.56 Ω
36.82 Ω
P100·125·140
14.05 Ω
9.11 Ω
9.87 Ω
12.89 Ω
Motor terminal
or
Relay connector
Normal Abnormal
Red-White 6.68Ω
Open or short
White-Black
Red-Black
Brown-Gray
6.68Ω
6.68Ω
8.144Ω
Gray-Yellow
Brown-Yellow
8.144Ω
8.144Ω
Normal
(1)-(5)
White-Red
150Ω ±10%
Abnormal
Open or short
(2)-(6)
Yellow- Brown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown
CNT
3T
1
3
CN3T
1
2
3
4
5
6
7
8
9
Gray
Blue
Black
Orange
Blown
Red
Red
Protector
Relay connector
Protector
Relay connector
4
1
8
9
2
5
3
6
Brown
Red
Orange
Orange
White
Gray
Black
Yellow
1
3
Red
Red
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
Parts name Check points
PEFY-P15~54
PEFY-P72·96
Measure the resistance between the terminals using a tester. (at 20˚C[68°F])
Normal
399Ω
Abnormal
Open or short
(Refer to the thermistor characteristic graph)
<Thermistor characteristic graph>
Room temperature thermistor(TH21)
Liquid pipe thermistor(TH22)
Gas pipe temperature thermistor(TH23)
Drain sensor(DS)
Thermistor R
0=15kΩ ± 3%
Fixed number of B=3480kΩ±2%
Rt=15exp { 3480( ) }
0˚C 15kΩ
10˚C 9.6kΩ
20˚C 6.3kΩ
25˚C 5.2kΩ
30˚C 4.3kΩ
40˚C
32˚F
50˚F
68˚F
77˚F
86˚F
104˚F 3.0kΩ
0
10
20
30
40
50
-20 -10 0 1020304050
Temperature
(˚C)
- 4 1432506886 104 122
[˚F]
Resistance (KΩ)
1
273+t
1
273
0˚C/6.0kΩ, 10˚C/3.9kΩ
20˚C/2.6kΩ, 25˚C/2.2kΩ
30˚C/1.8kΩ, 40˚C/1.3kΩ
1
3

Mitsubishi Electric CITY MULTI PEFY-P-NMLU-E Series Specifications

General

Brand	Mitsubishi Electric
Model	CITY MULTI PEFY-P-NMLU-E Series
Category	Air Conditioner
Language	English