Kohler 14EKOZD Installation Manual page 69

Step Potential Cause
Fault: Bus Sensing Connected to Generator Side of Breaker
1 Bus metering is
connected to the wrong
side of the paralleling
breaker
2 Breaker is closed and
status feedback is not
connected
Fault: Failure to Open
1 Wiring between CB trip
relay and trip coil is not
connected
2 CB trip relay is not
receiving 24V power
TP-7045 3/18c
Explanation
The controller sees the bus voltage always
matches the generator voltage, even when
the breaker contacts indicate that the
breaker is open.
The controller sees that the bus voltage
always matches the generator voltage,
even when the breaker contacts indicate
that the breaker is open.
The CB trip relay is releasing, but the coil in
the breaker is not energizing, hence the
breaker is not opening.
The CB trip relay is releasing, but there is
no voltage to apply to the trip coil. This is
most likely to occur when the generator has
a 12V battery and there is an external
battery bank to operate the circuit breaker.
Troubleshooting
Verify the bus metering is connected on the
load side of the paralleling breaker.
Verify the paralleling breaker control wiring
is connected correctly and the status
feedback is connected to an "A" contact.
Verify wiring to the trip coil (A4) is
connected correctly.
Verify the CB trip relay has a 24VDC
supply which is common to the CB close
relay and charge motor.
Section 9 Paralleling Generator Sets 69