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59
A1
A2
L3
L2
L1
T3
T2
T1
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10
~30
[50
°
F~86
°
F])
Thermistor (TH3)
<Outdoor pipe>
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<Low pressure saturated
temperature>
Thermistor (TH7)
<Outdoor>
Thermistor (TH8)
<Heatsink>
Normal
160k
~410k
4.3k
~9.6k
39k
~105k
TH4
TH3
TH6
TH7
TH8
Abnormal
Open or short
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20
[68
°
F])
Solenoid valve coil
<Four-way valve>
(21S4)
Motor for compressor
(MC)
Normal
Abnormal
Open or short
Measure the resistance between the terminals with a tester.
(Surrounding temperature 20
[68
°
F])
Normal
1183 ± 100
Abnormal
Open or short
Solenoid valve coil
<Bypass valve>
(SV1)
Refer to next page.
Fan motor(MF1,MF2)
1190 ± 100
0.188
Measure the resistance between the terminals with a tester.
(Winding temperature 20
[68
°
F])
Normal
Abnormal
Open or short
W
V
U
Normal
5.6
± 5%
Abnormal
Open* or short
Measure the resistance between the terminals with a tester.
*In case of open failure, check ACTM with a tester as well.
(Refer to 9-9. Test point ; the item of ACTM)
Rush current protect
resistor (RS)
only PUMY-P48NHMU
(1)
(-BS)
Note : As for P36NHMU and
P48NHMU
2
(-BS),rush current
protect resistor is mounted on noise
filter curcuit board. (20
±5% / 10W)
Measure the resistance between the terminals with a tester.
Coil (A1-A2)
Reference value : 1.45k
Normal
Abnormal
Open or short
Note : As for P36NHMU and
P48NHMU
2
(-BS),52C relay is
mounted on noise filter curcuit board.
(Reference value : 155
(typ))
Measure the resistance between the terminals with a tester.
Normal
Reference value : 0.04
Abnormal
Open or short*
*Because the resistor of the reactor is little, it is difficult to determine if it is short or normal with an ordinary tester.
52C relay (52C)
only PUMY-P48NHMU
(1)
(-BS)
Reactor (DCL)
9-7. HOW TO CHECK THE PARTS
PUMY-P48NHMU PUMY-P48NHMU
1
PUMY-P48NHMU
2
PUMY-P48NHMU-BS PUMY-P48NHMU
1
-BS PUMY-P48NHMU
2
-BS
PUMY-P36NHMU PUMY-P36NHMU-BS