How To Check Power Components - LG SV008iS5-2 Manual

5.4 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.
R
S
T
Diode Module Check
Check point
R, S, T – P1
R, S, T – N
Charge Resistor Check
Check point
Contactor terminals
DB (Dynamic Braking) IGBT (Option)
Check point
B2 - N
G - N
IGBT Module Check
Check point
B2 - N
G - N
Contactor P1
Charge resistor B1
B2
+
Electrolytic capacitors
G
E
N
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
Chapter 5 - Troubleshooting & Maintenance
P2
G
E
G
E
N
Dynamic Braking Unit (Option) for 15~30HP models
80
G G
E E
G G
E E
U
V
W