PREVOST H3-41 Maintenance Manual page 654

SECTION 18a: H3 SERIES BODY
ELECTRIC AWNING WINDOW – CONVERTER CHECKLIST
Check the electrical circuit
& proximity sensor
Check the release force
required to operate the
horizontal latch handle
Check Installation
Check for missing parts or
misaligned parts
50
PA1621 Maintenance Manual All Series
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.
Were the shipping blocks in place during installation?
C: Failure to remove the shipping blocks after installation can create interference between sash
and frame.
Have the shipping blocks been removed after installation?
D: The window is misaligned or not installed squarely.
Is there interference with any coach parts?
Is there proper clearance between the bottom of the outer glass and the belt-line trim /
seal?
A: The frame and sash are misaligned.
Is there any interference between the sash and frame?
Is there clearance between the sash and the rocker switch covers?
B: Releasing bar guides are missing.
Check that the releasing bar guides are installed. There should be 4 installed on H
windows, and 3 installed on XL2 windows.
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Revised Sept 2019