Reference: 38741
Issue date: 2018-JUL-24
Revision: L
Page 32 of 37
11. Trouble shooting
Problem
Probable cause
Solution
Hoists do not work when
pressing the ‘up/down’
push button.
GREEN
‘OK’ light OFF
No Main power
Check power and see if the power cord
is properly plugged and connected or go
down using the emergency manual
descent
Three phase hoists only:
Phases are reversed
Use screwdriver to reverse phases on
the phase reversal power plug of the
CCB.
Hoists do not work when
pressing the ‘up/down’
push button.
RED warning light ON
Emergency stop button has
been depressed
Release emergency stop button
Both hoists are not
connected to the CCB
Check that both hoists are correctly
plugged in the CCB
During reeving, the hoist
works in the ‘up’ direction,
but the suspension rope
does not reeve through
Steel wire rope is not
entering the hoist properly
Remove steel wire rope and repeat
reeving procedure (refer to Tip under
‘Reeving Steel Wire Rope’)
Hoists work for just a
moment in the “up”
direction and then stop.
RED warning light ON
The platform is overloaded
Remove excessive load to automatically
reset overload
The hoists do not work in
the up/down direction
RED warning light ON
Top limit switch has been
activated
Check for obstruction
(E.g. hitting the striker plate).
Lower by manual brake release.
Hoist hums, starts slowly or
is sluggish, or fails to lift
the loaded platform.
Serious voltage drop
Check the power supply and the
specifications of the power supply cable
Single phase hoist only:
Start capacitor is defective
Hoist to be checked by an approved
service centre
Service brake failure
Hoist to be checked by an approved
service centre
The hoists work for a long
time and then stop.
The electric motors are hot.
RED warning light ON
The thermal protection has
been activated
Let the motors cool down to reset
automatically.
Tip:
The ‘no power’ descent will still
operate when the overheating protector
is tripped.
The hoist turns both in the
‘up’ and ‘down’ direction,
but the platform does not
come down
The slack rope safety
device is activated, and
platform has come to rest
on an obstruction
Go up to come off the obstruction.
Slack rope lever does not
pivot properly
Slack rope mechanism is
contaminated by grit or
corrosion
Clean and lubricate slack rope safety
device
Platform goes up but
doesn’t go down.
Overspeed safety device is
activated.
Immediately stop operating downwards
to prevent rope jam. See 12.8 and 12.9
IF PROBLEM PERSISTS, CONTACT YOUR LOCAL SERVICE REPRESENTATIVE.
