OZ Lifting Products OZ Electric Series, Руководство оператора

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EN pg.17
9. TROUBLESHOOTING:
Table 8-7 Troubleshooting Guide
Symptom Cause Remedy
Hoist will not
operate
Loss of power Check circuit breakers, switches, fuses and connections on power lines/
cable.
Wrong voltage or frequency Check voltage and frequency of power supply against the rating on the
nameplate of the motor.
Hoist overload Reduce load to within rated capacity of hoist.
Improper, loose or broken wire
in the hoist electrical system
Shut off power supply, check wiring connections on hoist control panel
and inside push button pendant.
Brush wear Inspect both motor brushes per Table 8-2 and replace if necessary.
Fuses burned out Replace fuses.
Motor burned out Replace motor frame/stator, shaft/rotor and any other damaged parts.
Hoist lifts but
will not lower
Faulty switch in pendant Check electrical continuity. Check electrical connections. Replace or
repair as needed.
Broken conductor in pendant
cord
Check the continuity for each conductor in the cable. If one is broken,
replace the entire cable.
Hoist lowers
but will not lift
Hoist overload Reduce load to within rated capacity of hoist.
Worn friction clutch Repair by a qualified person trained in the repair of hoists and proper
friction clutch adjustment procedures. Replace as needed.
Broken conductor in pendant
cord
Check the continuity for each conductor in the cable. If one is broken,
replace the entire cable.
Faulty switch in pendant Check electrical continuity. Check electrical connections. Replace or
repair as needed
Low voltage in hoist’s power
supply
Determine cause of low voltage and bring to within plus or minus 5% of
the voltage specified on the motor nameplate. The voltage should be
measured at the hoist contactor.
Hoist will
not lift rated
load or does
not have the
proper lifting
speed
Hoist overload Reduce load to within rated capacity.
Low voltage in hoist’s power
supply
Determine cause of low voltage and bring to within plus or minus 5% of
the voltage specified on the motor nameplate. The voltage should be
Faulty friction clutch If abnormal operation or slippage occurs do NOT attempt to disassem-
ble or adjust the Mechanical Load Brake with Friction Clutch. Replace
the worn or malfunctioning Mechanical Load Brake with Friction Clutch
as an assembly with a new, factory adjusted part.
Load drifts
excessively
when hoist is
stopped
Motor demagnetized Motor demagnetizing is generally caused from using the hoist beyond
its duty rating. Replace stator assembly and reduce usage to comply
with the duty rating stated.
Improper gear oil Replace oil with the correct gear oil.
Hoist operates
intermittently
Loose connection in circuit Check all wires and terminals for bad connections. Replace as needed.
Collectors making poor contact Check movement of spring loaded arm, weak spring, connections and
shoe. Replace as needed.
Broken conductor in pendant
cord
Check for intermittent continuity in each conductor in the pendant cord.
Replace the entire pendant cord if continuity is not constant.