83
Table 7-1 Troubleshooting Guide
Symptom
Cause
Remedy
Hoist will not operate
Brake does not
release
Check motor brake adjustment for proper clearance.
. Replace brake if needed.
Faulty Hoist VFD
Check fault codes (Reference
Section 7.2
). Reset VFD by pressing
the Emergency Stop Button on pendant. Replace as needed.
Emergency Stop
Depressed on Push
Button Pendant Control
“Hbb” will appear on the dual speed unit’s VFD display when the
Emergency Stop Button is depressed. Turn the Emergency Stop
Button clockwise to unlock the controls and allow hoist operation.
Defect in control
transformer
Check transformer coil for signs of overheating. Disconnect
transformer and check for open winding.
Motor burned out
Replace motor frame/stator, shaft/rotor, and any other
damaged parts.
Broken conductor in
Pendant Cord
Check for intermittent continuity in each conductor of the Pendant
Cord. Replace entire Pendant Cord if continuity is not constant.
Faulty Hoist and/or
Trolley VFD
Check fault codes (Reference
Section 7.2
). Reset VFD by
pressing the Emergency Stop Button on pendant. Replace as
needed.
Trolley 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.
Motor overheated
and thermal overload
protector has tripped
See Troubleshooting Problem "Motor or brake overheating".
Improper, loose, or
broken wire in trolley
electrical system
Shut off power supply, check wiring connections in the trolley
switch box, on hoist control panel and inside push-button
pendant.
Emergency Stop
Depressed on Push
Button Pendant
Control
“Hbb” will appear on the dual speed unit’s VFD display when
the Emergency Stop Button is depressed. Turn the
Emergency Stop Button clockwise to unlock the controls and
allow hoist operation.
Motor burned out
Replace motor frame/stator, shaft/rotor, and any other
damaged parts.
Trolley drifts
excessively when
stopping
Motor brake not
holding
Clean and inspect brake lining. Check motor brake tolerances.
Replace if necessary
Faulty Trolley VFD
Check fault codes (Reference
Section 7.2
). Reset VFD by
pressing the Emergency Stop Button on pendant. Replace as
needed.
VFD Deceleration
parameter adjusted
incorrectly
(Dual Speed only)
Readjust VFD Deceleration parameter (Reference Section
3.11).
Motor or brake
Excessive duty cycle
Reduce frequency of trolley movement.
Summary of Contents for Harrington RY Series
Page 15: ...15 2 3 Part Names Figure 2 1 RY Part Names...
Page 42: ...42 Figure 3 20 Hoist Upper and Lower Limit Switch ULLS...
Page 57: ...57 Table 5 8 Various shapes that require the wire rope to be replaced...
Page 67: ...67 Table 6 9 Motor Brake Gap Capacity Code Brake Gap G inch mm RY030 RY050 0 032 0 8...
Page 104: ...104 9 3 Trolley Frame Parts Figure 9 3 Trolley Frame Parts...
Page 112: ...112 9 10 Hoist Motor Parts Figure 9 10 Hoist Motor Parts...
Page 114: ...114 9 11 Trolley Motor Parts Figure 9 11 Trolley Motor Parts...
Page 116: ...116 9 12 Control Panel Box Parts Figure 9 12 Control Panel Box Parts...
