GE VALUTROL MAIN CONTROL MODULE Instructions Manual page 15

GEK-24994
TABLE II FAULT CONDITIONS
A fault has occurred if the fault relay contact (FLT) is open or if the "READY TO RUN" light if off. The
conditions that can initiate a fault are as follows:
1. No three phase power.
2.
Loss of an incoming phase.
3.
Incorrect phase rotation.
4.
AC power fuse blown.
5.
Control fuse is open.
6. Power supply plus or minus DC fuse is open.
**
7.
Instantaneous overcurrent (IOC) level exceeded.
B. Motor thermo-switch (OLD). (If connected to fault circuitry).
*
9. Timed over current (TOC) - electronic.
(If
connected to fault circuitry).
**
10. Loss of motor field.
11. External Fault Stop momentarily released from Common.
12. Other special functions to System Trip(SYS) or External Fault Stop inputs.
13. System Trip input(SYS) momentarily connected to +10 volts.
14. RESET button depressed or RSET input momentarily connected to Common with motor rotating.
15. RESET button held depressed or RSET input held connected to Common.
16. Diagnostic mode selected with the motor rotating.
17. Oscillator (OSC) failed - "on."
' "
lB. Tachometer fault (loss of tachometer signal).
**
19. Overspeed.
20. Trip actuated from ACC (by AC overcurrent or SCR commutation failure).
>10
May not be provided. Refer to instructions on Motor Field Supply and System elementary diagram.
**
Can be caused by
LOC REF
and
CUR REI .
settings in Static Diagnostic mode.
After the fault condition has been cleared and the motor has come to standstill, the drive can be RESET by any
of the following three methods:
#
1. Momentarily remove the three-phase power and re-apply.
# 2. Push the RESET button.
#
3. Momentarily connect RSET to common.
#
If
all fault conditions have been cleared but the drive fails to RESET, the RSTOP adjustment may be set
too low.
15