Chapter 8 - Troubleshooting & Maintenance
8-6
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) is discharged.
1) Disconnect the power input line (R, S, T) and the inverter output to the motor (U, V, W).
2) Verify whether the inverter terminal R, S, T, U, V, W, B1 (or P/L1), N is shorted or open by changing the polarity of the
tester.
3) Verify capacitor has discharged before testing.
4) The tester should display several mega-ohms when open. The tester can display terminal is shorted for a short time and
then display several mega-ohms because of the electrolytic capacitor. The tester should display x
Ω
~ xx
Ω
when
terminal is shorted. If all measured values are about the same, individual modules are OK.
4) Diode module and IGBT module checking points:
Test Polarity
Test Polarity
Elements
+ -
Measured
Value
Element
+ -
Measured
Value
R DCP+ Short
R N Open
D1
DCP+ R Open
D4
N R Short
S DCP+ Short
S N Open
D2
DCP+ S Open
D5
N S Short
T DCP+ Short
T N Open
Diode
Module
D3
DCP+ T Open
D6
N T Short
U B1 Short
U N Open
Tr1
B1 U Open
Tr4
N U Short
V B1 Short
V N Open
Tr3
B1 V Open
Tr6
N V Short
W B1 Short
W N Open
IGBT
Module
Tr5
B1 W Open
Tr2
N W Short
R
G
E
G
E
G
E
G
E
G
E
G
E
S
T
U
V
W
G
E
P1 P2
B1
N
Dynamic Braking Unit (Option) for 15~30HP models
N
Charge resistor
Contactor
+
Electrolytic
capacitors
B2
D1
D2
D3
D6
D5
D4
Tr5
Tr3
Tr1
Tr2
Tr6
Tr4
DCP+
Summary of Contents for 30 HP30
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Page 18: ...Chapter 1 Installation 1 6 BLANK ...
Page 28: ...Chapter 1 Installation 1 16 Notes ...
Page 39: ...Chapter 2 Operation 2 11 Notes ...
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Page 60: ...Chapter 4 Operation Examples 4 14 Notes ...
Page 83: ...Chapter 5 Parameter List 5 23 Notes ...
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Page 92: ...Chapter 6 Parameter Description DRV 6 8 Notes ...
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Page 106: ...Chapter 6 Parameter description FU1 6 14 Notes ...
Page 126: ...Chapter 6 Parameter Description FU2 6 34 Notes ...
Page 144: ...Chapter 6 Parameter Description I O 6 52 Notes ...
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Page 188: ...Chapter 7 Options 7 26 Type 1 Max 400 Watt Type 2 Max 600 Watt A ...
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