LG GBB530***F Series, Service Manual

Page: 22 / 92

- 22 -
FCT0 Trip
Stroke Trip
Locked Piston Trip
Current Trip
IPM Fault
Communication
Error
App.
A-Inv.
A-Inv.
A-Inv.
A-Inv.
A-Inv.
A-Inv.
Requirement Waiting Time
30”
1’00”
2’30”
6’00”
20”
-
The number of LED
blinking
1
2
5
6
7
8
2) Method to Determine Defect of Inverter Linear Drive
Determination of Comp Operation
Separate the back cover at the rear of refrigerator and determine for possible operation while touching the compressor with
the hands with insulation gloves worn.
Comp Operation
- Determine possible trip by checking operation status if cold air comes out after opening the doors of the R-Room.
Protective Logic (Trip)
- To protect the compressor from abnormal operation, this logic is used to temporally stop the refrigerator when abnormal
operation occurs and to re-operate it after abnormal signal disappears.
Compressor protection Logic Table
* If LED of PCB is blinking, Refer to next page.
Initial, Motor sensing Voltage > 2.5V+20%
Piston overruns the designed range.
Piston is locked.
Current overruns the designed range
IPM pin 14 output voltage = low (IPM Short,
High current input, or low voltage input)
Checksum error
COMPRESSOR
Point A Point B
Multi
Tester
Multi
Tester
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
Point D V U
W
Resistance
12.3~15.1
12.6~15.4
Mode
BMG089NAMV
BMG089NHMV
Po
w
er
Sa
ve
Comon