How To Check The Parts - Mitsubishi Electric PUHZ-SW40VHA Service Manual

Phone Calls From Customers
A white mist is expelled from the indoor unit.
Water or moisture is expelled from the outdoor
unit.
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.

10-6. HOW TO CHECK THE PARTS

PUHZ-SW40VHA
PUHZ-SW50VHA
Parts name
Thermistor (TH3) Disconnect the connector then measure the resistance with a tester.
<Liquid> (At the ambient temperature 10 ~30 )
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heatsink>
Thermistor (TH34)
<Comp. Surface>
Fan motor(MF1) Refer to next page.
Solenoid valve coil Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 )
<Four-way valve>
(21S4)
Motor for compressor Measure the resistance between the terminals with a tester.
(Winding temperature 20 )
(MC) U
V
W
Linear expansion valve
Disconnect the connector then measure the resistance with a tester.
(LEV-A/ LEV-B) (Winding temperature 20 )
For SW40-50
Red
M
1
Blue
2
Orange
3
Yellow
4
White
5
OCH525
This is not a malfunction.
This may occur when the operation gets started in
the room of high humidity.
Cooling; when pipes or piping joints are cooled, they
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.
Batteries are being exhausted. Replace them and
press the reset button of remote controller.
PUHZ-SW40VHA-BS
PUHZ-SW50VHA-BS
Normal
TH4
160k ~410k
TH34
TH3
TH6
4.3k ~9.6k
TH7
39k ~105k
TH8
Normal
2350±170
Normal
0.64
Red - White Red - Orange
How to Respond
get sweated and water drips down.
Check points
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Normal
Red - Yellow
46±4
34
Note
Abnormal
Red - Blue
Open or short