SCANCLIMBER 65H Series, Instruction Manual

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O p e r a t i n g i n s t r u c t i o n s
20
V115E_09.20
Series-65H Hoist Pos 3
3.9.2 The Top Safety Limit
When the hoist has reached the safety limit, the reason for
this must always be thoroughly cleared up, and the pos-
sible fault repaired prior to restarting the hoist.
The safety limit is allowed to be bypassed only by a per-
son well familiar with the hoist’s operation and in charge
of its maintenance and installation.
After the bypass of the safety limit do not forget to take the
key off the switch. The key must not be kept in the hoist-
control panel, but in possession of the site’s supervision or
the person in charge of the hoist’s maintenance.
Possible reasons for the hoist reaching the
top safety limit:
• The cams of the top limit and the safe -
ty limit at the upper end of the mast
are not correctly adjusted in relation
to each other. The distance between
these limits is shorter than the braking
distance required for the hoist.
• The brakes of the lifting engines are not
correctly adjusted or for instance one
of the brakes does not work. That is why
the braking distance becomes longer
than normally and the hoist reaches
the safety limit.
• Frequency inverter fault - does not re -
act on PLC signals
• The mast’s top limit switch is not work -
ing and only the safety limit stops the
upward movement.
3.9.2.1 Top Safety Limit Reset
Lower the hoist from the top safety limit
by releasing the engine brakes manually.
Open the engine brakes by pushing care-
fully lever simultaneously towards the end
of the engines on the ventilator’s side. See
that the speed does not become too fast.
In too fast speed the safety brake stops the
hoist.
DO NOT USE the test box at the top
safety limit.
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