Inspection Procedures Corresponding To Detail Of Trouble; Sensor Error; Indoor Fan Motor Error - Mitsubishi Electric SRK05CR-S Technical Manual

(6) Inspection procedures corresponding to detail of trouble

Sensor error

Is connector connection good?
YES
Is sensor resistance value good?
YES
Replace PCB.
◆ Sensor temperature characteristics
(Room temp., indoor heat exchanger temp.)
(Broken wire)
30
25
20
15
10
5
(Short circuit)
- 10
0 10

Indoor fan motor error

Is connector connection good?
YES
Is the output of the indoor unit
PCB normal?
Power source reset
Is normal state restored?
YES
Malfunction by temporary
noise
NO
Correct connection.
NO
Replace sensor.
20 30 40 50 60 70
Temperature (˚C)
NO
Correct connector connection
NO
Replace indoor PCB
Replace fan motor (If anomaly
NO
persiste after replacing fan motor,
replace indoor PCB)

- -
'15 • SRK-T-171
[Broken sensor wire,
connector poor connection]
[Defective fan motor, connector poor
connection, defective indoor PCB]