Mitsubishi SUZ-A09VR - Page 53

53
Check of compressor
D
Check of compressor winding
E
Check of compressor operation time
F
● Disconnect the connector (CN61) between compressor and power
transistor module, and measure the resistance between the
compressor terminals.
Measurement point at 3 points of lead wire.
at 3 points
BLK-WHT
BLK-RED
WHT-RED
<<Judgement>>
Refer to page 50.
0["] ···············Abnormal [short]
Infinite["] ·······Abnormal [open]
NOTE 1. Be sure to zero the ohmmeter before measurement.
2. Winding resistance for each phase at 20:.
Refer to page 6 and 7.
●Connect the compressor and activate the inverter. Then measure
the time until the inverter stops due to over current.
<<Operation method>>
[For SLZ/SUZ]
Start heating or cooling operation by pressing the EMERGENCY
OPERATION switch on the indoor unit. (Test-run mode)
[For SEZ/SUZ]
Start heating or cooling operation by pressing the TEST button
twice on the remote controller. (Test-run mode)
<<Measurement>>
Measure the time from the start of outdoor fan running to the
stop of the inverter due to over current.
<<Judgement>>
For reference
0~10 seconds·····················Abnormal (compressor short)
10~60 seconds···················Abnormal (compressor lock-out)
60 seconds~5 minutes·······Abnormal (refrigerant circuit defect)
more than 5 minutes···········Normal
Outdoor fan starts
Abnormal
(Compressor winding short or layer short)
Abnormal
(Compressor lock-out)
Abnormal
(Refrigerant circuit defect, etc.)
Normal
0 sec.
10 sec.
60 sec.
5 min.
Normal
(1~several ")
Abnormal
(0" ····· short)
Abnormal
(infinite····· open)
Ohmmeter indication
Start
Ok
Replace the compressor.
E "Check of compressor
winding" on page 53.
Is the compressor normal?
No
Replace the compressor.
No
Yes
X1
"
X1
"
X1
"
23
W
U
V
1
WHT
Compressor motor
RED BLK
Yes
F "Check of compressor
operation time" on page
53. Does the compressor
operate continuously?
Is the compressor
operation time more than
10 seconds?
No
Check the refrigerant circuit.
Yes
<Judgement scale>
[SUZ-A09VR.TH SUZ-A12VR.TH]
OC304A --2qxp 04.6.29 8:34 AM Page 53