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PE 2008T
PE 2003T
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Safety devices controlling carriage misalignment: prevents one carriage from lowering
when the carriage is stuck. (1, Fig. 14 and 1, Fig. 16).
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Safety valves (hydraulic diagram): they prevent the lowering of the carriages in case of
sudden pressure drop in the hydraulic system.
Low-voltage additional electric circuit: this circuit cannot originate any «electric shock».
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Overhead safety shut-off system (12, Fig. 1): stops upward movement when the vehicle is
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about to hit the overhead crossbeam.
5.5 EMERGENCY LOWERING
WARNING: When an «emergency lowering» of the carriages is carried out, the mechanical
safety locks of the carriage braking are cut-off.
The following operations shall thus be carried out only:
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When lift does not go down due to a power failure or in case of power cut-off;
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In case of absolute need;
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By a single qualified operator;
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If the lift area is delimited and made accessible to a single operator.
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Emergency carriage lowering procedure:
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If the lift is in the braking position, the safety locks will not open. The following operations
will be possible only if the lift features an emergency manual pump to be used to raise
lift so as to release the safety mechanical locks, supplied upon request with the relevant
instructions for use.
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Release the safety mechanical locks by operating the pneumatic valve manually (if a source
of compressed air is available) turning the screw (1, Fig. 22)
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If no compressed air sources are available, loosen the nut (2, Fig. 13) and pull the rope (3,
Fig. 12) to open the safety mechanical locks (Fig. 12 A). Re-tighten the nut. Repeat the
same procedure for the other column.
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Proceed with a manual lowering manoeuvre as follows:
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Fully remove EV1 solenoid valve cover (2, Fig. 22), and then press needle (3, Fig.23) very
slowly to move carriages down.
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Once this operation is completed, fully screw solenoid valve cover (2, Fig. 22) and take the
manual opening device (1, Fig. 22) for pneumatic solenoid valve EVP to its original position
(Fig. 22).
DANGER: Carefully carry out the operation described at the previous point.
CAUTION: After recovering the lift ordinary operation, carry out 2-3 UP/DOWN runs
with the lift unladen and check that the safety devices work normally as described at the
following point 6.1.
PE 2009T
75
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