Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 282

Resolución de averías
Check of compressor
C
Refer to 11-5.D "Check of
compressor winding".
Is the compressor normal?
Refer to 11-5.E "Check of
compressor operation time".
Does the compressor
operate continuously?
OK
Check of compressor winding
D
● Disconnect the connector (CN61) between the compressor and
intelligent power module, and measure the resistance between the
compressor terminals.
<<Measurement point>>
at 3 points
BLK-WHT
BLK-RED
WHT-RED
<<Judgement>>
Refer to 11-4.
0[ ] ···············Abnormal [short]
Infinite[ ] ·······Abnormal [open]
NOTE: 1. Be sure to zero the ohmmeter before measurement.
Check of compressor operation time
E
●Connect the compressor and activate the inverter. Then measure the
time until the inverter stops due to over current.
<<Operation method>>
Start heating or cooling operation by pressing EMERGENCY
OPERATION switch on the indoor unit.
(Test run operation : Refer to 8-3.)
<<Measurement>>
Measure the time from the start of compressor to the stop of compressor
due to over current.
282
No
Yes
No
Yes
Measure the resistance between the
lead wires at 3 points.
Replace the compressor.
Refer to 11-5.F "Check of compressor start failure".
<<Judgement>>
For refrence
0 second
1 second
2 seconds
10 seconds
10 minutes
Compressor starts
Abnormal
(IPM failure)
(Compressor winding short)
Abnormal
(Compressor lock out)
(Starting defect)
Abnormal
(Poor contact,)
(Outdoor P.C.board defect)
(disconnected connector)
Abnormal
(Refrigerant circuit defect)
(closed valve)
Normal