Service manual
34
Phone Calls From Customers How to Respond Note
This is not a malfunction.
This may occur when the operation gets started in
the room of high humidity.
A white mist is expelled from the indoor unit.
Cooling; when pipes or piping joints are cooled, they
get sweated and water drips down.
Heating; water drips down from the heat exchanger.
* Make use of optional parts “Drain Socket” and
“Drain pan” if these water needs to be collected and
drained out for once.
Water or moisture is expelled from the outdoor
unit.
Batteries are being exhausted. Replace them and
press the reset button of remote controller.
The display of wireless remote controller gets dim
or does not come on.
The indoor unit does not receive a signal from
remote controller at a long distance.
1
2
3
4
5
M
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10~30)
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 20)
Thermistor (TH3)
<Liquid>
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heatsink>
Thermistor (TH34)
<Comp. Surface>
Normal
160k~410k
4.3k~9.6k
39k~105k
TH4
TH34
TH3
TH6
TH7
TH8
Abnormal
Open or short
Normal
Red - White Red - Orange
Red - Yellow
Red - Blue
Abnormal
46±4
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20)
Solenoid valve coil
<Four-way valve>
(21S4)
Motor for compressor
(MC)
Linear expansion valve
(LEV-A/ LEV-B)
For SW40-50
Normal
Abnormal
Open or short
Abnormal
Open or short0.64
Open or short
Refer to next page.
Fan motor(MF1)
2350±170
Measure the resistance between the terminals with a tester.
(Winding temperature 20
)
Normal
W
V
U
Red
Blue
Orange
Yellow
White
10-6. HOW TO CHECK THE PARTS
PUHZ-SW40VHA PUHZ-SW40VHA-BS
PUHZ-SW50VHA PUHZ-SW50VHA-BS
OCH525