Samsung Electronics 240
Troubleshooting
▪ Diagnosis 3 : Check Inverter PBA defect with Tester
1. Power Off.
2. Wait more than 15 minutes after the Power Off as in case of IPM failure, discharge mode may not work properly.
3. Remove all of the Inverter PBA connectors and wire that is fixed as screw. (Include wire that is fixed to compressor and DC Reactor.)
4. Prepare the digital multi tester.
Division
Measured Point
Criterion Remark
+ -
Measure
the resistance values
P-IGBT U
More than 500KΩ
Measurement error can occur for reasons
such as the initial measurement
condenser discharge.
Measured over at least three times.
P-IGBT V
P-IGBT W
U N-IGBT
V N-IGBT
W N-IGBT
Measure the diode
voltage values
U P-IGBT
0.3~0.7V
V P-IGBT
W P-IGBT
N-IGBT U
N-IGBT V
N-IGBT W
4-4-12 Case study – E461/361 & E464/364 & E466/366 (cont.)
4-4 Case study for trouble shoots (cont.)
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