Electric Chain Hoists (Single Brake)
Model NECH
PAGE: 55
NECH-0214
ACI Hoist & Crane | 2721 NE 4th Ave Pompano Beach, FL 33064| 954.367.6116
Visit WWW.ACIHOIST.COM for the most current information
Table 8.1
8.0 TROUBLESHOOTING
If the hoist operates erratically, or not at all the hoist should be taken out of service. Any problem should be diagnosed
and corrected before the hoist is returned to regular service. Refer to Table 8.1 for some problem areas to consider and
investigate.
Table 8.1
Troubleshooting Guide
Problem
Possible Cause
Corrective Action
Hoist will not operate.
Power failure in power lines.
Check circuit breakers, switches and connections
in power lines. Check power collectors.
Wrong voltage or frequency.
Check voltage and frequency, or power supply.
Check voltage required on motor data plate against
power supply.
No control voltage.
Check transformer fuses. If blown, check for
grounding and/or short in the pushbutton station.
Check the transformer coil for signs of overheating.
Replace transformer if burned out. Verify the
transformer secondary is the same voltage as the
coils to which it is connected.
Motor overheated.
Check voltage and frequency, or power supply.
They must match with the data on the nameplate.
Improper, loose or broken wire
connection
Check wiring connections. Check connections in
pushbutton station and limit switches.
Brake does not release.
Check connections and lead wires. Check
connections in control devices.
Control transformer damaged.
Check transformer fuses, coil and open winding.
Motor burned out.
Replace the motor.
Hook moves in the
wrong direction.
Reverse phasing.
Interchange any tow power supply line leads.
Improper electrical connections.
Check all connections with the wiring diagram
Hook lifts but will not
lower.
Lowering circuit open.
Check circuit for loose connections. Check lower
limit switch (if provided).
Broken conductor in pendant
cable.
Check continuity of each conductor in the cable. If
one is broke, replace the cable.
Improper electrical connections.
Check all connections with the wiring diagram
Lowering circuit open.
Check circuit for loose connections. Check lower
limit switch (if provided).
Broken conductor in pendant
cable.
Check continuity of each conductor in the cable. If
one is broke, replace the cable.
Disconnect power and lockout/tagout the disconnecting means before performing
service to electrical parts of this equipment.
Only a qualified person should perform service to electrical parts of this equipment.
