12
12
Mtrac winch for passenger elevation
Problem
Possible cause
Fault elimination
Platform neither trav-
els up nor down but
the motor turns when
the UP/DOWN button
is pushed
Never continue to operate!
A Rope jam inside the winch
Damaged/incorrect wire rope or
rope lead-off not possible
Stop working immediately and require
assistance (manufacturer or supplier of
the winch)
B Safety lock
has triggered and
holds the platform
on the safety
rope
as a consequence of a
bro-
ken suspension rope
or
dam-
age to the winch
Stop working immediately
and
require
assistance (manufacturer or supplier of
the winch)
Note section 4.6
C
Platform is caught
e.g. on an obstacle
Move platform free. Check system
for safety.
Problem
Possible cause
Fault elimination
Platform only travels
down but not up,
motor does not turn
when the UP button is
pushed
Only continue travelling, if there no longer is a safety risk!
D Platform is caught
e.g. on an obstacle
Remove obstacle
Check platform for safety
E Winch is overloaded,
lifting force limitation has
switched off the winch
Reduce the load on the platform or
distribute it more evenly
F Fault in UP circuit
of the con-
trol system
Check contactors and wiring, repair, if
required
G One phase has failed
Check supply line and fuse links
H No motor output
a) Start-up capacitor defective
b) Centrifugal force switch de-
fective
(only for single-phase motors)
a) Check start-up capacitor and re-
place if necessary
b) Measure current on auxiliary wind-
ing, repair only possible by Yale
Industrial Products
I Brake rectifier defective
Replace brake rectifier
Summary of Contents for YaleMtrac
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