Cutler-Hammer - Eaton Canada

Solutions To Drive Problems
TROUBLESHOOTING
Message Possible
Causes
MOTOR FAULT
HS OVER TEMP
EXTERNAL FAULT
MOTOR PARAM FAULT
THERMAL OVERLOAD
EE PROM FAIL
SINGLE PHASE
1. Excessive load on
motor.
2. Motor leads are open.
Heat sink has exceeded
198¡F (92¡C):
1. Ambient temperature
high.
2. Blocked air flow.
3. Fan not operating.
4. Excessive load on
motor.
5. Impedance below 1%.
1. External fault line
has been opened.
2. Inadequate resistors in
optional Dynamic
Brake package.
Motor Related Parameter
keypad entries are
inconsistent. Example:
Maximum Speed is lower
than Minimum Speed.
Indicates calculated
motor temperature has
exceeded rating
EEPROM in drive circuit
failed.
Excessive load on single
phase input
Suggested
Remedies
1. Reduce load on motor.
2. Check motor leads.
1. Compare room air
temperature to
specifications.
2. Check for blocked air
flow.
3. Check fan operation.
4. Reduce load on motor.
5. Install 1% line reactor.
Reset external fault
contact.
Check the Motor Related
Parameters. See Section 4,
Using The Parameters, for
the ranges of these
parameters.
Reduce load on motor.
Replace drive, contact your
Cutler-Hammer service
representative.
1. Check for high line
voltage at each input
phase is present (Drive
terminals L1, L2, and L3).
2. If this display occurs on
a 240V AF93/IS903,
please contact your
Cutler-Hammer service
representative.
AF93/IS903 Instruction Manual
5-5