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21
844 MPS Troubleshooting Chart
Light Emitting Diodes (LEDs)
Condition
Open Stop FSW FCC FCA
Solution
Normal when gate
is half opened
OFF ON ON ON ON
None
Normal when gate
is opened
OFF ON ON OFF ON
None
Normal when gate
is closed
OFF ON ON ON OFF
None
Gate tries to close
when gate is
already closed
OFF
ON
ON
OFF
ON
Change the limit switch
connection (see Figs. 13, 15, or
17, depending on your control
panel).
Gate tries to open
when gate is
already opened
OFF
ON
ON
ON
OFF
Change the limit switch
connection (see Figs. 13, 15, or
17, depending on your control
panel).
Gate will not open
or close
OFF
ON
ON
OFF
OFF
•
Check limit switch for open
circuit.
•
To test control panel limit
switch logic, remove limit
switch wiring and install
jumpers between the
terminals. Both the FCA
and FCC lights should
illuminate. If they do not,
replace the limit switch.
Motor will not run
OFF
OFF
OFF
OFF
OFF
Check fuses and main 220 VAC
power
Gate will not close
OFF
ON
OFF
OFF
ON
Check that reversing devices
are not triggering the gate to
remain open.
Gate will not open
or close
OFF
OFF
ON
OFF
ON
Check for a jumper between
terminals 1 and 3. If you have
no stop device, you must have
a jumper between these
terminals.
Upswung.com
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