© 2018 Columbus McKinnon Corporation. All Rights Reserved
12
P/N: EL-680 REV AA JULY 2018
TABLE 3. TROUBLESHOOTING
TROUBLE
CAUSE
REMEDY
Hook Fails to Stop
End of Travel
1. Improperly adjusted
brake.
2. Worn brake listings.
3. Magnetic reversing
controller
malfunction.
1. Adjust per ADJUSTMENT AND REPAIRS
SECTION.
2. Replace when excessively worn.
3. Check out reversing controller.
Hoist Does Not
Respond to
Pushbutton
1. Power failure in
supply lines.
2. Wrong voltage or
frequency.
3. Brake does not
release.
4. Improper connections
in hoist or pushbutton
station.
5. Faulty magnetic
controller.
1. Check circuit breakers, switched and
connections in power lines.
2. Check voltage and frequency of power supply
against the rating on the hoist nameplate.
3. Check brake adjustment. See ADJUSTMENT
AND REPAIRS SECTION. Check connection to
brake coils for open and short circuit.
4. Check all connections at line connectors and on
terminal block.
5. Check coils for open or short circuit. Check all
connections in control circuit. Check for burned
contacts. Replace as needed.
Hook Does Not Stop
Promptly
1. Hoist overloaded.
2. Brake not holding.
1. Reduce load to within rated capacity of hoist.
2. Check brake adjustment. See ADJUSTMENT
AND REPAIRS SECTION. Check brake linings
for wear.
Hook Moves in Wrong
Direction
1. Three-phase
reversal.
2. Improper
connections.
1. Reverse any two wires (except the green ground
wire) at the power source.
2. Check all connections against wiring diagram.
Hook Raises But Will
Not Lower
1. “Down” circuit open.
2. Broken conductor in
pushbutton cable.
3. Faulty magnetic
controller.
1. Check circuit for loose connections. Check
“Down” limit switch for malfunction.
2. Check each conductor in the cable. I one is
broken, replace entire cable.
3. Check coils for open or short circuit. Check all
connections in control circuit. Check for burned
contacts. Replace as needed.
Hook Lowers But Will
Not Raise
1. Hoist overloaded.
2. Low Voltage.
3. Broken conductor in
pushbutton cable.
4. Faulty magnetic
controller.
1. Reduces load to within rated hoist capacity.
2. Determine cause of low voltage and bring up
within plus or minus 10% of the voltage specified
on the hoist.
3. Check circuit for loose connections. Check “UP”
limit switch for malfunction.
4. Check each conductor in the cable. If one is
broken, replace entire cable.
5. Check coils for open or short circuit. Check all
connections in control circuit. Check for burned
contacts. Replace as needed.
Lack of Proper Lifting
Speed
1. Hoist overloaded.
2. Brake not releasing
fully.
3. Low Voltage.
1. Reduce load to within rated capacity of hoist.
2. Check brake adjustment. See ADJUSTMENT
AND REPAIRS SECTION.
3. Bring up within plus or minus 10% of the voltage
specified on the hoist.
