48
Check of compressor winding
D
Check of compressor
C
●
Disconnect the connector between compressor and IPM, and
measure resistance between the compressor terminals.
<<Measurement point>>
at 3 points
BLK-WHT
BLK-RED
WHT-RED
<<Judgment>>
0.82 to 1.01
"
at -10
:
to 40
:
of part temperature.
0[
"
] ···············abnormal [short]
Infinite[
"
] ·······abnormal [open]
NOTE 1.Be sure to zero the ohmmeter before measurement.
2.Winding resistance for each phase is 0.45
"
at 20
:
.
Check of compressor operation time
E
●
Connect the compressor and activate the inverter. Then measure
the time until the inverter stops due to overcurrent.
<<Operation method>>
Start heating or cooling operation by pressing the emergency
operation switch on the indoor unit. (Test-run mode)
<<Measurement>>
Measure the time from the start of outdoor fan running till the
stop of the inverter due to overcurrent.
<<Judgment>>
For reference
0~10 seconds·····················abnormal (short)
10~60 seconds···················abnormal (compressor lock-out)
60 seconds~5 minutes·······abnormal (refrigerant circuit defect)
more than 5 minutes···········normal
w
Measure resistace between the
lead wires at 3 points.
Outdoor fan starts
Abnormal
(Compressor short circuit 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
Check resistance of compressor.
Check compressor operation time.
Ok
Compressor is short or
open.
Replace compressor.
See
D
'Check of compressor winding'.
Is resistance
1~several
"
at -10
:
~ 40
:
of winding
temperature?
Does compressor run
continuously?
See
E
' Check of compressor operation time,'
No
Compressor is layer short
or lock-out.
Refrigerant circuit is
defective.
Replace compressor.
Check refrigerant circuit.
No
Yes
X1
"
X1
"
X1
"
2
3
W
U
V
1
WHT
Compressor motor
RED BLK
Yes
OB230-2.qxp 02.5.28 7:37 PM Page 48
