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Mitsubishi Electric PLA-RP1.6AA Service Manual Page 69

Mr. slim pla series ceiling cassettes.
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10-5. HOW TO CHECK THE PARTS
PLA-RP1.6AA.UK
PLA-RP2AA.UK
PLA-RP2.5AA.UK
PLA-RP3AA.UK PLA-RP3AA
PLA-RP4AA.UK PLA-RP4AA
PLA-RP5AA.UK PLA-RP5AA
PLA-RP6AA.UK PLA-RP6AA
Parts name
Room temperature
Disconnect the connector then measure the resistance using a tester.
thermistor
(TH1)
(Surrounding temperature 10:~30:)
Pipe temperature
thermistor/liquid(TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
Vane motor
Measure the resistance between the terminals using a tester.
(Surrounding temperature20:)
Fan motor
Measure the resistance between the terminals using a tester.
(Winding temperature 20:)
Relay connector
1
Red
1
White
2
2
3
Black
3
Protector
OFF:130:
ON :80i20:
Drain pump
Measure the resistance between the terminals using a tester.
(Winding temperature 20:)
Red
1
2
Red
Drain sensor
Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0:~60:)
1
2
3
.UK
1
.UK
1
.UK
1
.UK
1
Normal
4.3k"~9.6k"
Open or short
Normal
15k"
Open or short
Motor terminal
or
PLA-RP1.6,2,2.5,3AA.UK
Relay connector
PLA-RP3AA
Red-Black
White-Black
Normal
290"
Open or short
Normal
0.6k"~6.0k"
Open or short
Check points
Abnormal
(Refer to the thermistor)
Abnormal
Normal
PLA-RP4,5,6AA.UK
.UK
PLA-RP4,5,6AA
1
87.2"
28.7"
104.1"
41.6"
Abnormal
Abnormal
(Refer to the thermistor)
69
Abnormal
.UK
1
Open or short

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