Kohler 23EKOZD

TP-6953 7/19 127Section 7 Troubleshooting
Step Potential Cause
Explanation Troubleshooting
Fault: Bus Sensing Phases A and B are Reversed
1 The bus sensing for
phase A is connected to phase B of the paralleling bus and vice versa
Phase angle from generator to bus is about 180_ and bus rotation is backwards.
Verify wiring between bus sensing inputs and load side of paralleling breaker.
2 The wiring between the
generator and the paralleling breaker is incorrect
Phase angle from generator to bus is about 180_ and bus rotation is backwards.
Verify wiring between generator and paralleling breaker.
3 The generator
metering is not connected correctly
Phase angle from generator to bus is about 180_ and bus rotation is backwards.
Verify metering connections on the generator. L1 should connect to the phase A output lead. L2 to phase B, L3 to phase C, L0 to neutral.
Fault: Bus Sensing Phases B and C are Reversed
1 The bus sensing for
phase B is connected to phase C of the paralleling bus and vice versa
Phase angle from generator to bus is about - 120_ and bus rotation is
backwards.
Verify wiring between bus sensing inputs and load side of paralleling breaker.
2 The wiring between the
generator and the paralleling breaker is incorrect
Phase angle from generator to bus is about - 120_ and bus rotation is
backwards.
Verify wiring between generator and paralleling breaker.
3 The generator
metering is not connected correctly
Phase angle from generator to bus is about - 120_ and bus rotation is
backwards.
Verify metering connections on the generator. L1 should connect to the phase A output lead. L2 to phase B, L3 to phase C, L0 to neutral.
Fault: Bus Sensing Phases C and A are Reversed
1 The bus sensing for
phase A is connected to phase C of the paralleling bus and vice versa
Phase angle from generator to bus is about 120_ and bus rotation is backwards.
Verify wiring between bus sensing inputs and load side of paralleling breaker.
2 The wiring between the
generator and the paralleling breaker is incorrect
Phase angle from generator to bus is about 120_ and bus rotation is backwards.
Verify wiring between generator and paralleling breaker.
3 The generator
metering is not connected correctly
Phase angle from generator to bus is about 120_ and bus rotation is backwards.
Verify metering connections on the generator. L1 should connect to the phase A output lead. L2 to phase B, L3 to phase C, L0 to neutral.
Fault: Bus Sensing Not Connected
1 No wires connect the
bus sensing on the generator to the load side of the paralleling breaker
Wiring not connected between load side of the paralleling breaker and the bus metering.
Verify that the bus sensing is connected.
2 No leads connect the
generator output to the line side of the paralleling breaker
The leads connecting the output of the generator to the paralleling breaker are not connected.
Verify that the leads connecting the generator to the paralleling breaker are connected.