31
[SUZ-KA25/35/50VA3.TH]
D Check of compressor winding
Disconnect the connector 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 [
Ω
] ················Abnormal [short]
Infinite [
Ω
] ·······Abnormal [open]
NOTE
: Be sure to zero the ohmmeter before measurement.
* Measure the resistance between the lead wires at 3 points.
E Check of compressor operation time
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
0 second
1 second
2 seconds
10 seconds
10 minutes
<<Judgement>>
Check the refrigerant circuit.
Check the stop valve.
Replace the compressor.
No
Does the compressor run for 10 seconds or
more after it starts?
After the compressor is heated with a drier,
does the compressor start?
Compressor start failure. Activate pre-heat control.
(Refer to 10-2. "PRE-HEAT CONTROL SETTING")
Yes
Yes
F Check of compressor start failure
Confi rm that
1
~
4
is normal.
• Electrical circuit check
1
Contact of the compressor connector
2
Output voltage of inverter P.C. board and balance of them (See 11-5.
B
)
3
Direct current voltage between DB61(+) and (-) on the inverter P.C. board
4
Voltage between outdoor terminal block S1-S2
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 11-5
B
.)
<<Measurement>>
Measure the time from the start of compressor to the stop of
compressor due to overcurrent.
Heating part
*1 Heat the compressor with a drier for
about 20 minutes. Do not recover
refrigerant gas while heating.
OCH530
