How To Check Power Components - LG SV-iS5 Instruction Manual

Chapter 8 - Troubleshooting & Maintenance

8.4 How to Check Power Components

Before checking the power components, be sure to disconnect AC Input supply and wait until the Main Electrolytic
Capacitors (DCP-DCN) discharge.
Contactor
Charge resistor
R
Electrolytic
S
capacitors
T
n Diode Module Check
Check point
R, S, T – P1
R, S, T – N
n Charge Resistor Check
Check point
Contactor terminals
n DB (Dynamic Braking) IGBT (Option)
Check point
B2 - N
G - N
n IGBT Module Check
Check point
B2 - N
G - N
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P1 P2
B1
G
E
B2
+
G
E
G
E
N
N
Dynamic Braking Unit (Option) for 15~30HP models
Resistance to be Good
50 k ohms or more
50 k ohms or more
Resistance to be Good
Depending on model
Resistance to be Good
50 k ohms or more
A few kilo ohms
Resistance to be Good
50 k ohms or more
A few kilo ohms
186
G G
E E
G G
E E
U
V
W