PREVOST H3-41 Maintenance Manual page 801

Actuator Replacement
1. Push the vertical latch handle downwards to
release the track and then unlatch the
window using the horizontal latch handle.
2. Remove actuator access cover by taking out
screws #1 (8x).
3. Take out screws #2 (2x) and remove
horizontal latch handle and guide.
4. Take out the guide screws #3 (4x) and
remove releasing bar.
5. Unplug connectors from defective actuator,
unscrew nuts #4 (2x) and remove the
actuator.
6. Reverse operations for reinstallation.
ELECTRIC AWNING WINDOW – CONVERTER CHECKLIST
Check the electrical circuit
& proximity sensor
Check the release force
required to operate the
horizontal latch handle
Check Installation
A: The latching system will not operate without power.
Is there electrical power to the latching circuit? The horizontal latch handle, on the sill sash
will be seen to move if there is power on this circuit, or it can be checked with an electrical
tester. If there is no power to this circuit when the window is closed and either rocker
switch are switched "ON", there is a problem with the electrical system.
B: The Proximity Sensor on the sash may not be switching power to the latching circuit if the
magnet is not getting close enough to the switch OR the Proximity Sensor may be broken (or stuck
in one position).
Is the proximity sensor switching when the window is closed?
A: If the pull force required to move the latch is more than 20lbs the window will not latch properly.
Average pull force during testing by manufacturer is 12lbs -15lbs.
What is the force required to release the handle? Check using a force gauge (same test
done by manufacturer).
A: If the window is too tightly installed OR if the sequence for tightening the clamping frame screws
Is incorrect the window may not close properly.
Was the window installed correctly?
Was the correct sequence (see below) used when tightening the clamping frame screws?
B: Removing the shipping blocks before the window is installed can create major problems.
PA1621 Maintenance Manual All Series | Revised Sept 2019
SECTION 18b: X3 SERIES BODY
Motor Replacement
1. Push the vertical latch handle downwards to
release the track and then unlatch the
window using the horizontal latch handle
2. Take out the screw at the lower end of the
track to let free the swiveling arm roller.
3. Remove actuator access cover by taking out
screws #1 (8x).
4. Loosen the set screws #5 (rotate the arm to
get to the second set screw) and disengage
the swiveling arm from the motor shaft
extension.
5. Unplug motor connector and dismount motor
and support assembly.
6. The shaft extension is glued to the motor
shaft. It has to be heated to break the
binding to permit removal. Loosen set screw
#6 and remove the shaft extension. Also
loosen screw #7 and remove motor from the
support.
Reverse operations for reinstallation.
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