How To Check The Parts - Mitsubishi Electric PUHZ-SW75VHA 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 doesn not come on.
The indoor unit does not receive a signal from
remote controller at a long distance.

10-5. HOW TO CHECK THE PARTS

PUHZ-SW75VHA(-BS).UK
PUHZ-SW100VHA(-BS).UK
PUHZ-SW100YHA(-BS).UK
Parts name
Thermistor (TH3)
Disconnect the connector then measure the resistance with a tester.
<Liquid>
(At the ambient temperature 10
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heatsink>
Thermistor (TH34)
<Comp. surface>
Fan motor Refer to next page.
(MF1,MF2)
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/LEV-C)
(Winding temperature 20 )
Gray
1
M
2
Orange
Red 3
Yellow 4
5
Black
OCH533A
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-SW120VHA(-BS).UK
PUHZ-SW120YHA(-BS).UK
Normal
TH4
160k - 410k
TH34
TH3
4.3k - 9.6k
TH6
TH7
39k - 105k
TH8
Normal
1435 150
SW75V SW100/120V
0.88 0.19
Gray - Black Gray - Red
How to Respond
get sweated and water drips down.
Check points
- 30 )
Abnormal
Open or short
Abnormal
Open or short
Normal
SW100/120Y
0.30
Normal
Gray - Yellow
46 3
40
Abnormal
Open or short
Abnormal
Gray - Orange
Open or short
Note