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Curtiss-Wright | EL120 Rev. G PN60914 10/10/19
86
TROUBLESHOOTING PROCEDURES
This section provides you with guidelines and hints on troubleshooting various problems
that may be encountered during installation and operation of your Exlar GS/X Series
actuator.
Symptom / Trouble
Possible Cause / Troubleshooting Procedure
No response from actuator.
1. Check amplifier for faults that may indicate
problem.
2. Check to insure that amplifier is enabled.
3. Check for proper wiring.
Actuator seems to be enabled
(receiving current) but is not
operating or is operating
erratically.
1. Amplifier may be improperly tuned. Check all
gain settings.
If a motor file or parameters specific to your amplifier/actuator
combination have been supplied by Exlar, be sure that they
are entered or downloaded properly.
2. Amplifier may be set up improperly for the
particular motor being used. Check amplifier
settings for number of poles, voltage, current,
resistance, inductance, inertia, etc.
3. Feedback wiring may be incorrect.
4. Feedback conductors are touching, or
feedback cable may be damaged.
5. Motor phases are wired incorrectly or in
incorrect order. (R,S,T).
6. Feedback (resolver or encoder) is improperly
aligned. Contact Exlar.
Actuator cannot move load.
1. Load is too large for the capacity of the
actuator or too much friction is present.
2. Excessive side load.
3. Misalignment of output rod to load.
4. Amplifier has too low of current capacity or is
limited to too low of current capacity.
Actuator housing moves or
vibrates when shaft is in
motion.
1. Check actuator mounting. Insure that the
actuator is securely mounted.
2. Amplifier is improperly tuned (wrong gain
settings.) Tune amplifier.
Output rod rotates during
motion and thus does not
provide proper linear motion.
1. Install Exlar anti-rotation assembly or
incorporate anti-rotation into the application.
Brake does not hold load in
place.
1. Load is larger than the capacity of the brake.
-check load level against actuator rating
-oil lubricated units reduce holding capacity of the brake
2. Brake is not engaged. (Power is not removed,
or only partially removed from brake).
3. Brake is being used as other than a power
loss holding brake.
Actuator is overheating.
1. Insufficient cooling for application
requirements. See oil cooling section of this
manual or Exlar catalog or contact Exlar engineering.
2. Actuator is being operated outside of
continuous ratings.
3. Amplifier is poorly tuned causing excessive
unnecessary current to be applied to motor.
Check Gain settings.
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