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59
A1
A2
L3L2L1
T3
T2T1
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/Compressor
>
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/NHMUR1(-BS) and
P48NHMU
2
/NHMUR3(-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/NHMUR1(-BS) and
P48NHMU
2
/NHMUR3(-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-P36NHMU(-BS) PUMY-P36NHMUR1(-BS)
PUMY-P48NHMU(-BS) PUMY-P48NHMU
1(-BS) PUMY-P48NHMU2(-BS)
PUMY-P48NHMUR3(-BS)