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Table 7-1 Troubleshooting Guide
Symptom
Cause
Remedy
Hoist lifts but will not
lower
Down circuit open
Check circuit for loose connections. Check down side of limit
switch for malfunction.
Broken conductor in
pendant (pickle) cord
Check the continuity for each conductor in the cable. If one is
broken, replace entire cable.
Faulty magnetic
contactors
Check coils for open or short circuit. Check all connections on
motor circuit. Check for burned contacts. Replace as needed.
Faulty switch in
pendant (pickle)
Check electrical continuity. Check electrical connections.
Replace or repair as needed.
Hoist lowers but will
not lift
Hoist overloaded
Reduce load to within rated capacity of hoist.
Low voltage in hoist's
power supply
Determine cause of low voltage and bring to within plus or minus
10% of the voltage specified on the motor nameplate. The
voltage should be measured at the hoist contactor.
Up circuit open
Check circuit for loose connections. Check up side of limit switch
for malfunction.
Broken conductor in
pendant (pickle) cord
Check the continuity of each conductor in the cable. If one is
broken, replace entire cable.
Faulty magnetic
contactor
Check coils for open or short circuit. Check all connections on
motor circuit. Check for burned contacts. Replace as needed.
Faulty switch in
pendant (pickle)
Check electrical continuity. Check electrical connections.
Replace or repair as needed.
Faulty friction clutch
Replace.
Hoist will not lift rated
load or does not have
the proper lifting speed
Hoist overloaded
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
10% of voltage specified on the motor nameplate. The voltage
should be measured at the hoist contactor.
Brake drags
Check motor brake adjustment for proper clearance.
Faulty friction clutch
Replace.
Load drifts excessively
when hoist is stopped
Motor brake not
holding
Clean and inspect brake lining. Check brake adjustment for
proper clearance.
Summary of Contents for TNER Series
Page 37: ...This Page Intentionally Left Blank 37...
Page 38: ...Figure 9 1 Housing and Motor Parts 38 9 1 Housing and Motor Parts...
Page 41: ...This Page Intentionally Left Blank 41...
Page 42: ...Figure 9 2 Gearing Parts 9 2 Gearing Parts 42...
Page 44: ...Figure 9 3 Hook Parts 9 3 Hook Parts 44...
Page 46: ...Figure 9 4 Chaining Parts 9 4 Chaining Parts 46...
Page 48: ...Figure 9 5 Electric Parts 9 5 Electric Parts 48...
Page 53: ...53 Appendix A Wiring Diagram...
Page 54: ...54...