Midilift XLplus
Maintenance Guide
Jan
2014
Issue
4
33
17.4 Overspeed
lift
Depending on when the lift was installed, an overspeed governor test switch may be present. This switch can be
used to activate the overspeed governor remotely (from the test controls box within the upper landing controller)
Access the upper landing controller and check the test controls box located near the bottom of the electrical
enclosure. If there is a button marked ‘OSG test’ then the lift has been fitted with remote activation.
To activate the overspeed governor using this button, simply drive the lift in the required direction and press and
hold the ‘OSG test’ button until safety gear activates (Ensure that G1 – G1A has been linked out).
If the lift is not fitted with the remote activation then follow the flow diagram below to activate the overspeed
governor manually.
When the user switches to
full speed the overspeed
governor will now simulate
overspeed (over 0.2m/s)
Access overspeed governor
and switch rope to test
grove.
Access lift pit, lock off
tension pulley and remove
tension pulley packers.
Re fit tension pulley and
undo locking bolts (with
packers removed).
0.25
0.2
Access overspeed governor
and switch rope to test grove.
Access lift pit, lock off tension
pulley and remove tension
pulley packers.
Re fit tension pulley and undo
locking bolts (with packers
removed).
Re programme the inverter so
that the lift will run at an
increased frequency (
17.5
Set the lift to run at 80.0 Hz
,
pg 30).
When the user switches to full
speed the overspeed
governor will now simulate
overspeed (over 0.25m/s)
What is the tripping
speed of the
overspeed
governor? This can
be found on the
governor name
plate.
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