Generac Power Systems Power Zone Pro Sync Owner's Manual page 44

Troubleshooting
Alarm Display Text
MPS GEN ADDED
PLC GEN
DISABLED
CURRENT
PROTECTION
OVER CURRENT
PROTECTION
ENGINE STALLED
STARTER NOT
ENGAGED
BOSCH
THROTTLE STUCK
40
Description
There is an additional generator
connected to the MPS that is not
accounted for. Verify the MPS
configuration is correct or remove
a generator from the
system.
The generator has been disabled
by a PLC program.
The output current of the
generator has exceeded the I
algorithm limits. There is likely
one or more alternator phases
shorted.
The output current of the
generator has limited to 300%
rated current for ten consecutive
seconds. There is likely one or
more alternator phases shorted.
The engine speed sensor
indicates the speed dropped
below 400 RPM when it was
expected to be above 1,200
RPM. This is often due to loss of
fuel or an engine speed sensor
fault. When this alarm occurs, the
Main Controller will shut down
and attempt to restart the engine.
The starter was commanded to
engage, but the battery voltage
readings indicate the starter did
not actually engage. This is likely
due to the starter not interlocking
with the ring gear, the starter
solenoid failing, the starter
contactor failing, or the starter
relay failing.
The Bosch throttle plate is not
moving to the commanded
position while powered or it is not
resting at the commanded
position while not powered. This
is likely due to the throttle being
jammed, the throttle motor
becoming weak, the actuator
driver module failing, or the
throttle sensor failing.
Set Alarm
The MPS was configured
with a set number of
generators, and the Main
Controller is seeing
communication from more
than the configured
amount.
A PLC program has
overridden the generator
and shut it off.
2
The I T algorithm threshold
2
T for over current protection
was exceeded.
300% rated current was
maintained for ten seconds.
The engine speed sensor
indicates the speed
dropped below 400 RPM
when it was expected to be
above 1,200 RPM.
The battery voltage did not
dip the expected amount
during cranking that would
signify the starter engaging.
The following conditions
will set the fault:
•
Throttle more than 12%
open when off.
• Throttle more than 14%
away from the target
and not moving quickly
enough toward the
target.
Clear Alarm
Remove the extra
generator or fix the MPS
configuration. The
warning will clear once
the communications
issue is resolved.
This warning will clear
automatically when the
PLC program is no
longer disabling the
generator.
Turn keyswitch to OFF.
Verify no line faults are
present. Clear the alarm
using the Display.
Turn keyswitch to OFF.
Verify no line faults are
present. Clear the alarm
using the Display.
This warning is cleared
every time the generator
is restarted.
The alarm will clear
automatically after it has
been acknowledged
using the Display.
Turn the keyswitch OFF.
Verify the throttle is not
stuck and the Main
Controller is indicating
the correct throttle
position. Clear the alarm
using the Display.
Owner's Manual for Power Zone Pro Sync