Troubleshooting
Samsung Electronics 4-73
IPM [IGBT] breakdown diagnostics (Inverter PCB)
1. Preparations before checking
1) Power Off.
2) IPM failure, discharge mode may not work properly. Therefore, wait more than 15 minutes after the Power Off.
3) Remove all of the Inverter PCB connectors and wir e that is fixed as screw.
(In
clude wire that is fixed to compressor and DC Reactor.)
4) Prepar e the digital multi test er.
2. Inspection Method
1) Refer to Figure1 and Table1, respectively the resistance value and diode voltage value measure .
2) According to the criterion in Table 1 to det
ermine whether the failure of IPM.
Division
Measured Point
Criterion Remark
+-
Measure
the resistance values
P-IGBT U
More than
500 Ꮒ
Measurement error can occur for reasons s
uch as the initial measurement condenser
discharge.
Measured over at least three times.
P-IGBT V
P-IGBTW
UN-IGBT
VN-IGBT
W N-IGBT
M
easure the diode
voltage values
U P-IGBT
0.3~0.7V
V P-IGBT
WP-IGBT
N-IGBT U
N-IGBT V
N-IGBTW
< Table 1 >
< Figure 1 >
ࢉ؟ 3&%
Inverter PCB
To Next Page
Loading...
