OZ Lifting Products OZ Builder's Hoist OM - Manual (Page 11)

Trouble Shooting
If the hoist fails to start after several attempts or the hoist’s operation appears to
be defective check the following:
OBSERVED
ANOMALY
POSSIBLE CAUSE SOLUTION
No Reaction
after
pressing the
buttons on
the control
pendant
No power Check power source
Disconnection of plug, power cord or pendant cord Replace or repair
Damaged motor resulting from overload Replace
Burnt diode assy Replace
Considerable voltage drop Adjust to rated voltage
Wearing of carbon brushes Replace carbon brushes
Brake
distance too
long
Wearing of lining, pressed plate and pawl Replace
Disconnection of electronic generated braking Repair nut cord or Replace D type resister
Voltage Too high Adjust to rated voltage
No overwinding
Prevention
while swivel
hook
touches
limit lever
Disconnection of electronic generated braking Repair nut cord or Replace D type resister
Malfunction of limit switch Replace
Lifting
speed too
slow
Overload Reduce Load
Considerable voltage drop Adjust to rated voltage and check the section of the
power cord
Electrical
leakage or
shock
Burnt motor resulting from overload Replace motor
Wearing of carbon brushes Replace carbon brushes and clean any carbon powder
in the motor
Water invaded motor or push button Dry it or replace motor if badly saturated
Abnormal
sound in
gear box
Insufficient oil resulting from oil leakage Replace oil seal and refill with sufficient oil
Distortion of gear box Repair
pg.11
All mechanical or electrical work must be carried out by a qualified tradesperson.