Troubleshooting
Installation Guidelines for Air-Cooled Generators
43
1057 VSCF
Overvoltage
RED
Unit shuts down
during operation
or starting.
Check the
LEDs/Screen
for alarms.
Probable causes are:
1) The generator has been overloaded. Remove load and
attempt to restart unit.
2) Generator has started into a severe load. Manually
operate generator breaker and try to restart unit. If prob-
lem persists, remove load and attempt to restart unit
again.
1058 VSCF DC
Undervoltage
RED
Unit shuts down
during operation
or starting.
Check the
LEDs/Screen
for alarms.
The DPE winding supplies this voltage.
1) Alternator damage. Contact servicing dealer.
1059 VSCF
Field Loss
RED
Unit shuts down
during starting.
Check the
LEDs/Screen
for alarms.
Unit detects no output voltage while starting.
1) Alternator damage. Contact servicing dealer.
1061 VSCF
Field Loss
RED
Unit shuts down
during operation.
Check the
LEDs/Screen
for alarms.
Unit detects loss of output voltage while running.
1) Alternator damage. Contact servicing dealer.
1060 Big Fan Failure
RED
Unit shuts down
during operation.
Check the
LEDs/Screen
for alarms.
This alarm occurs when the AVR electronics temperature
exceeds 70 C. Possible causes are:
1) AVR filter faulty. Replace AVR filter.
2) Intake or exhaust air path is blocked. Check intake and
exhaust.
3) The BIG fan is not running (only runs when the engine
is running).
KEEP FINGERS AWAY FROM FAN HOUS-
ING- PERSONAL INJURY CAN OCCUR IF FAN IS RUN-
NING.
Contact servicing dealer.
4) Air leak in AVR enclosure. Contact servicing dealer.
5) Engine running too hot. Inspect air intake and exhaust.
6) Ambient temperature has risen above 60º F. Derate the
generator output per specifications.
If message is displayed when generator is stopped, also
check SMALL fan. Small fan RUNS for 60 minutes after
generator is stopped and keeps electronics cool during
heat soak.
1065 Overfrequency
RED
Unit shuts down
during operation.
Check the
LEDs/Screen
for alarms.
Probable causes are:
1) Overload. Remove load and attempt to restart unit.
2) RPM sensor has failed. Contact servicing dealer.
3) Stepper motor problem. Contact servicing dealer.
1066 VSCF Speed
mismatch
RED
Unit shuts down
during Operation
or starting.
Check the
LEDs/Screen
for alarms.
1) Fuel problem (pressure loss). Check fuel supply and
attempt to restart unit.
2) Large overload. Remove load and attempt to restart
unit.
3) Throttle or engine problem. Contact servicing dealer.
1070 Small fan
failure
YELLOW
“Small fan failure”
is displayed. If
unit was running
in AUTO, it will
continue to run for
one hour to cool
electronics with-
out fan.
Check the
LEDs/Screen
for alarms.
Small fan current incorrect. Probable causes are:
1) Fan wiring or mechanical problem. Contact servicing
dealer.
2) Air path is blocked. Check AVR filter.
KEEP FINGERS AWAY FROM FAN HOUSING- PER-
SONAL INJURY CAN OCCUR IF FAN IS RUNNING.
Table 8-3. G-Flex™ Diagnostics (Continued)
Ecode/Active
Alarm
LED Problem
Things to
Check
Possible Causes/Solution
