LG GBB530***F Series, Service Manual

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COMPRESSOR
1. Inverter Linear Compressor
1) Method to Measure Compressor Winding Resistance
Normal Determination Criteria.
The compressor winding resistance can be determined as normal if resistance values show the values as described in
below figure when measuring resistance values of the harness (connected with compressor) to connect.
Connect201(CON201) of the main PWB as shown in below figure.
Check for defect of the inverter linear compressor in following orders:
Defect Determination Criteria
•
Check connection status of the Compressor Connection Harness-P(Lead Wire) which is located at the M/C room where
resistance values measured at the CON201 Housing are shown as infinite or several hundred MΩ . Separate connecting
wires of the M/C room (A-point in Figure) and then measure resistance values at the connecting wires again. The
compressor can be determined as normal if resistance values are shown as standard resistance value. Check connection
status of a harness.
Defect at M/C room connection contact or CON201 Housing contact, short-circuit of harness)
•
Where resistance values measured at A-point are also shown as infinite or several hundred MΩ , disassemble a cover PTC
of the compressor terminal and check the terminal connecting status at the B-point in Figure.
•
Where there is no failure in the wiring status and resistance values are shown as infinite or several hundred MΩ , it may be
determined as defect of compressor.
•
Since if there is no failure in resistance values of the compressor, it may be defective Main PWB, replace the Main PCB
and check for normal operation of the compressor.
•
When determining any defect through resistance measuring, it can be determined as normal if resistance values show as
descried in the below figure by measuring
①
power and
③
common terminal or
②
full power and
③
common terminal.
However, resistance values are measured when measuring
①
power and
②
full but measuring is meaningless since they
cannot become criteria for determining defect (measuring not required).
Caution
1. Be sure to powering off the refrigerator and measure after several minutes has passed.
2. If not accurately measuring resistance, wrong determination may be guided. (Difference of resistance value of several W
or so may occur.)
Multi
Tester
CON201
Multi
Tester
Po : Power
Co : Common
N/C : Open terminal
Po N/C
Co
Multi
Tester
Multi
Tester
Because of ambient temperature or operating situations;
the values shown can have a slight devlation.
Earth
Hermetic terminal
Dead Short Check
Resistance
10 ~ 12 Ω
FLA102NAMA
OLP