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GEDA
®
1500 Z/ZP
Malfunctions - Diagnosis – Repair
BL076 GB Edition 07.2015
75 / 84
Operating Manual
Fault
Cause
Remedial action
Red control light
illuminates
Overload protection has
triggered
Reduce the load
Motor does not
attain full
performance
Voltage drop of more than
10%
Select a supply cable or
extension cable with a
greater cross section
Platform has
ascended too high
(Refer to
Chapter
Top landing-level limit switch
defective
Fault in the electrical system
Test/replace top landing-level
limit switch
Check system
Platform has run
too low
(Refer to
Chapter
Fault in the electrical system
Air gap for the brake is too
large
Check system
Adjust air gap
The platform
access door ground
station does not
open.
Platform is stationary, not
stopped by the
DOWN
limit
switch
Door lock defective
No voltage
Move platform to the
DOWN
limit switch
Door
EMERGENCY
unlock.
Replace defective lock
Connect power supply
5.3
Fault rectification
5.3.1
Motor is not producing full output
−
Voltage drop of more than 10% of the rated voltage.
−
Select supply cable with larger cross-section.
−
If overloaded, the integrated thermal switch turns off the control
current. Work can continue after a certain cool-down period (possibly
reduce load).
Refrain from repeated overheating/overloading. - Otherwise the
service life of the motor/brakes will be shortened.
5.3.2
Platform moved too high
The platform
EMERGENCY
limit switch can reach the upper
EMERGENCY
limit switch bar if
−
The up limit switch is defective,
−
there is a malfunction in the electrical system.
Action:
•
Operate motor brake using the manual release lever (refer to