82
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.
load or does not have
the proper lifting speed
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 VFD.
Faulty Hoist VFD
Check fault codes (Reference
Section 7.2
). Reset VFD by
pressing the Emergency Stop Button on pendant. Replace as
needed.
Brake drags
Check motor brake adjustment for proper clearance.
Open phase (single
phase operation) –
Motor “growling”
sound.
Check for an electrical “open” in the power source/supply and
correct.
Improper Braking
Resistor
Inspect Braking Resistor for breakage.
Load drifts excessively
when hoist is stopped
Motor brake not
holding
Clean and inspect brake lining. Check motor brake tolerances.
Replace if necessary
Faulty Hoist VFD
Check fault codes (Reference
Section 7.2
). Reset VFD by
pressing the Emergency Stop Button on pendant. Replace as
needed.
Hoist and/or Trolley
Motor or brake
Overheating
Excessive load
Reduce load to within rated capacity of hoist.
Excessive duty cycle
Reduce frequency of lifts and/or trolley movement.
Wrong voltage or
frequency
Check voltage and frequency of power supply against the rating
on the nameplate on the motor.
Brake drags
Check motor brake adjustment for proper clearance.
Extreme external
heating
Above an ambient temperature of 104°F, the frequency of hoist
operation must be reduced to avoid overheating of the motor.
Special provisions should be made to ventilate the hoist or
otherwise shield it from the heat.
Hoist and/or Trolley
operates intermittently
Collectors making
poor contact
Check movement of spring loaded arm, weak spring,
connections, and shoe. Replace as needed.
Loose connection in
circuit
Check all wires and terminals for bad connections. Replace as
needed.
Содержание Harrington RY Series
Страница 15: ...15 2 3 Part Names Figure 2 1 RY Part Names...
Страница 42: ...42 Figure 3 20 Hoist Upper and Lower Limit Switch ULLS...
Страница 57: ...57 Table 5 8 Various shapes that require the wire rope to be replaced...
Страница 67: ...67 Table 6 9 Motor Brake Gap Capacity Code Brake Gap G inch mm RY030 RY050 0 032 0 8...
Страница 104: ...104 9 3 Trolley Frame Parts Figure 9 3 Trolley Frame Parts...
Страница 112: ...112 9 10 Hoist Motor Parts Figure 9 10 Hoist Motor Parts...
Страница 114: ...114 9 11 Trolley Motor Parts Figure 9 11 Trolley Motor Parts...
Страница 116: ...116 9 12 Control Panel Box Parts Figure 9 12 Control Panel Box Parts...
Страница 119: ...119 This Page Intentionally Left Blank...