Yale Mtrac YMT-M Series, Translation Of Original Operating And Maintenance Instructions

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 Mtrac endless winch

Problem

Possible cause

Fault elimination

Winch neither travels 
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

 (optional) has trig-

gered and holds the load 

on the 

safety rope

 as a consequence 

of a 

broken suspension rope 

or

damage to the winch

Stop working immediately

 and

require 

assistance (manufacturer or supplier of 
the winch)

C

Load is caught

e.g. on an obstacle

Free the load. Check system for 
safety.

Problem

Possible cause

Fault elimination

Winch 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  Load is caught 

e.g. on an obstacle

Remove obstacle 

Check system for safety

E  Winch is overloaded, 

lifting 

force limitation has switched off 
the winch

Reduce the load 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 defec-

tive 

(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

5.  Eliminating malfunctions

In the case of malfunctions, act calmly and carefully 
in order to avoid serious injuries:

1)  Inspections and repairs of the electrical equipment must only be 

carried out by qualified electricians or by an authorised hoist service 
company. Circuit diagrams can be found in the control system of the 
Yale endless winch.

Always pull the power plug before opening the electric 
box on the winch or the control system!

2)  Repairs of Yale endless winches and safety locks must only be car-

ried out by Yale Industrial Products or by an authorised hoist service 
company!