Kohler G220 User Manual

TP-6322 9/04 17Section 4 Troubleshooting
Problem Possible Cause Corrective Action
ATS fails to operate
and no LEDs are lit
No power to the transfer
switch/controller.
Close circuit breakers leading from power sources to the
transfer switch. Troubleshoot power to the system. See Section
4.2.
Generator set does
not start when the
normal source fails
Generator set master switch is in the
OFF position or the batteries are not
charged or connected.
Place the generator set master switch in the AUTO position.
Check that the generator set batteries are charged and
connected.
Engine start circuit is malfunctioning. Troubleshoot. See Section 4.5.
Generator set is malfunctioning. See the generator set operation or service manual.
Generator set does
not start with the
exerciser
Exerciser switch is in the Disable
position.
Place the exerciser switch in the Enable position to enable
normal exerciser operation. Move the exerciser switch to the
Set position to test the exerciser and reset the exerciser timer.
See Section 2.3 for exerciser operation.
Generator set master switch is in the
OFF position or the batteries are not
charged or connected.
Place the generator set master switch in the AUTO position.
Check that the generator set batteries are charged and
connected.
Engine start or exerciser circuit is
malfunctioning.
See Section 4.5 first to troubleshoot the engine start circuit, then
see Section 4.6 to troubleshoot the exerciser.
Generator set is malfunctioning. See the generator set operation or service manual.
Generator set does
not shut down
Generator set master switch is in the
RUN position.
Place the generator set master switch in the AUTO position.
The engine start circuit is
malfunctioning, the exerciser is
operating, or the exerciser circuit is
malfunctioning.
If the exerciser has recently been in the Set position or is in the
Enable position, wait for the exerciser period of 20 minutes to
end. If the generator set continues to run, see Section 4.5 first
to troubleshoot the engine start circuit, then see S ection 4.6 to
troubleshoot the exerciser.
Time delay engine cooldown (TDEC)
has not timed out. (after retransferring
the load to the normal source)
Check operation. Enough time must pass for the time delay
engine cooldown (TDEC, 2 minutes) timer to time out.
Generator set is malfunctioning. See the generator set operation or service manual.
ATS starts the
h
Generator set circuit breaker is open. Close circuit breakers leading from the generator set to the ATS.
generator when
normal fails but fails
t
o
t
r
a
n
s
f
e
r
t
h
e
l
o
a
d
Time delay normal-to-emergency
(TDNE) has not timed out.
Check operation. Enough time must pass for the time delay
normal-to-emergency (TDNE, 2 seconds) to time out.
t
o
t
rans
f
er
t
h
e
l
oa
d
to the emergency
source
Generator voltage is out of range or
emergency source sensing circuits
are malfunctioning.
Check the emergency source voltage. Repair or adjust
generator set if the output voltage is it is out of range, otherwise
see Section 4.9.
Contactor operation problems. Troubleshoot. See Section 4.3.
ATS fails to
retransfer the load
Normal source circuit breaker is open. Close circuit breakers leading from the normal source to the
transfer switch.
to the normal
source after the
n
o
r
m
a
l
s
o
u
r
c
e
Time delay emergency-to-normal
(TDEN) has not timed out.
Check operation. Enough time must elapse for the time delay
emergency-to-normal (TDEN, 12 seconds) timer to time out.
norma
l
source
returns
Normal source voltage levels are out
of range or the normal source sensing
circuits are malfunctioning.
Check the normal source voltage. If the normal source voltage
is within range see Section 4.10.
Contactor operation problems. Troubleshoot. See Section 4.4.
Contactor
h
i
i
Debris is in the contactor mechanism. Clean the contactor assembly. See Section 3.1.2.
mechanism is
b
i
n
d
i
n
g
Outer mechanism needs lubrication. Lubricate the outer mechanism. S ee Section 3.1.2.
b
i
n
d
i
ng
Contactor mechanism is damaged. Replace the contactor assembly.
ATS operates
erratically or
operates out of
specifications
Power supply problems/loose
connections, incorrect transfer switch
controller operation/calibration.
For erratic operation, check wiring for loose connections
especially those t hat supply power to the controller or in the
affected circuit. Check the power supply. See Section 4.2. See
Section 4.8 for problems related to time delays in the operating
sequence except for the exerciser. See Section 4.6 for
problems related to exerciser time delays. For problems related
to dropout and pickup specifications see Section 4.9 for the
emergency source or Section 4.10 for the normal source.
Figure 4-1 Troubleshooting Chart

Kohler G220 Specifications

General

Brand	Kohler
Model	G220
Category	Switch
Language	English