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This section provides basic troubleshooting information. Specific causes to problems are best identified by thorough inspections
performed by personnel instructed in safety, operation and maintenance of this equipment. The chart below provides a brief guide to
common trolley symptoms, probable causes and remedies.
TROUBLESHOOTING
Symptom
Cause
Remedy
Trolley will not operate.
No electrical supply to trolley.
Check electrical system connections, cords and fuses.
Trolley is overloaded.
Reduce load to within rated capacity.
Damaged gear wheel and/or drive shaft.
Inspect gear wheel and drive shaft gear teeth.
Replace damaged parts.
Control voltage transformer damaged or
burned out.
Check voltage and frequency at trolley. Ensure they
are within specifications on nameplate. Replace
transformer.
Emergency Stop engaged.
Disengage Emergency Stop button.
Trolley continues to move when
controls are released.
Optional brake is slipping.
Check trolley is equipped with optional brake. Check
brake spring and brake adjustment. Check brake
discs are clean.
Trolley does not move load or does
not travel at rated speed.
Motor may be damaged.
Remove and disassemble motor as described in the
“MAINTENANCE” section. Examine all parts and
replace any that are worn or damaged.
Insufficient electrical supply.
Verify electrical voltage, phase, voltage drop and
amperes under load/no-load conditions.
Trolley wheels are slipping.
Clean beam track and trolley wheels.
Trolley runs in opposite direction of
Control Pendant operation.
Power cables (L1 and L2) are incorrectly
located.
Reverse the two power cables (L1 and L2).
Control Pendant is operated but
trolley does not operate.
Control Pendant may be damaged.
Check Control Pendant for signs of damage. Refer to
“INSPECTION” section.
Motor may be damaged.
Remove and disassemble motor as described in the
“MAINTENANCE” section. Examine all parts and
replace any that are worn or damaged.
No electrical supply to trolley.
Check electrical system connections, cords, fuse,
transformer and circuit breaker.
Trolley runs slow.
Improper electrical supply.
Verify electrical voltage, phase, voltage drop and
amperes under load/no-load conditions.
Oily or sticking brake discs.
Disassemble, clean and dry discs.
Motor may be damaged.
Remove and disassemble motor as described in the
“MAINTENANCE” section. Examine all parts and
replace any that are worn or damaged.
Brake Solenoid hums, buzzes or
vibrates.
Brake Solenoid air gap(s) incorrect.
Reset air gap(s). Refer to “MAINTENANCE”
section.
Motor hums or travel speed is slow.
Oily or sticking brake discs.
Disassemble, clean and dry discs.
Brake disc tabs may be binding in brake
cage.
Check brake discs slide freely in brake cage.
Electrical leak.
Poor grounding (earth).
Correctly ground (earth) power supply. Check wiring
for broken wires.
Foreign material or moisture on electrical
connectors.
Dry or remove foreign material which may have
accumulated on electrical parts.
Short in power supply system.
Check all switches, connections and circuit breakers
in power supply line for damaged insulation or
contact with trolley frame.
