41
7.0
Troubleshooting
!
WARNING
HAZARDOUS VOLTAGES ARE PRESENT IN THE TROLLEY AND IN CONNECTIONS BETWEEN
COMPONENTS.
Before performing ANY maintenance on the equipment, de-energize the supply of electricity to the equipment, and
lock and tag the supply device in the de-energized position. Refer to CSA Z460, “Control of hazardous energy –
Lockout and other methods”.
To avoid a shock hazard,
DO NOT
perform
ANY
mechanical or electrical maintenance on the trolley or hoist within 5
minutes of de-energizing (disconnecting) the trolley or hoist. This time allows the internal VFD capacitor to safely
discharge.
Only trained and competent personnel should inspect and repair this equipment.
NOTICE
Do Not perform “withstand voltage” test or “insulation resistance” measurement (megger) with the VFD connnected.
Do Not remove power to the hoist or trolley during operation.
Do Not connect power to the output of the VFD.
When handling VFD provide ESD protection.
Table 7-1 Troubleshooting Guide
Symptom
Cause
Remedy
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.
Faulty VFD
Check fault codes (Reference Section 3.5). Reset VFD by
pressing the Emergency Stop button on the pendant. Replace as
needed.
Emergency Stop
Depressed on Push
Button Pendant Control
“Hbb” will appear on the 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.
DPC fuse blown out
Check the continuity of the fuse (Reference Section 3.4.11).
Replace DPC if necessary.
Summary of Contents for SMR2Q Series
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Page 46: ...46 9 1 Electric Parts Figure 9 1 1 Electric Parts...
Page 48: ...48 9 2 Pendant and Power Supply Parts Figure 9 2 1 Pendant and Power Supply Parts...
Page 50: ...50 9 3 Side Plates and Suspension Parts Figure 9 3 1 Side Plates and Suspension Parts...
Page 52: ...52 9 4 Motor Parts Figure 9 4 1 Motor Parts...
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