72
Check of compressor
D
Check of compressor winding
E
Check of compressor operation time
F
● Disconnect the connector (CN61) between compressor and intelligent
power module, and measure the resistance between the compressor
terminals.
Measurement point at 3 points of lead wire.
BLK-WHT
BLK-RED
WHT-RED
<<Judgment>>
Refer to 12-4..
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 4. SPECIFICATION.
Normal
(1~several )
Abnormal
(0 ······ short)
Abnormal
(infinite······ open)
Ohmmeter indication
Ok
Replace the compressor.
"Check of compressor
winding".
Is the compressor normal?
No
Replace the compressor.
No
Yes
X1
X1
X1
23
W
U
V
1
WHT
Compressor motor
RED BLK
Yes
"Check of compressor
operation time". Does the
compressor operate
continuously?
Is the compressor
operation time more than
10 seconds?
No
Check the refrigerant circuit.
Yes
●Connect the compressor and activate the inverter. Then measure
the time until the inverter stops due to over current.
<<Operation method>>
[For wireless remote controller use model]
Start heating or cooling operation by pressing the EMERGENCY
OPERATION switch on the indoor unit. (Test-run mode)
[For wired remote controller use model]
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
compressor due to over current.
<<Judgment>>
For reference
0~10 seconds······················Abnormal (compressor short or poor contact)
(compressor lock-out)
10 seconds~5 minutes········Abnormal (refrigerant circuit defect)
more than 5 minutes············Normal
Outdoor fan starts
Abnormal
(Compressor winding short or layer short)
(compressor connector poor contact)
(compressor lock-out)
Abnormal
(Refrigerant circuit defect, etc.)
Normal
0 second
10 seconds
5 min.
[SUZ-KA25/35VA(H).TH]
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