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® 2018 Valco Companies, Inc.
APPENDIX 4 - Troubleshooting - continued
10. Inlet/Curtain Settings
Full opening not enough or
too much.
10.1a
Check the Fan Groups On and Full Opening Size menu items to make sure both are
correct.
10.1b
Is the cable machine at the end of its run? Maybe it is geared wrong. Change the
pulley system to allow a wider opening.
10.1c
Check run time and full opening distance. If these are not correct, the inlet/
curtain will not open properly for any setting.
Not opening when fans
run.
10.2a
Have you set them up to open proportionally to number of fan groups running? See
the
Operation Manual
for setting up inlets and curtain openings.
Not shutting completely.
10.3a
Is the Minimum Opening Size correct? Choose zero if you want them to shut all
the way.
10.3b
If the Equipment Status screen shows a 0 inch opening and the machine is on
the Close limit then use a manual winch to close the device completely.
11. Position Sensor
I keep getting Out of Po-
sition Alarms.
11.1a
Run the calibration process for the position sensor that appears to be causing
the problem. Refer to the
Operation Manual
for instructions. Check the position
sensor to controller wiring.
11.1b
Check whisker switch wiring and operation; compare to Current Equipment
Status screen.
12. Static Pressure
My inlets or curtains are
opening more than they
need.
12.1a
Under the inlet or curtain menu, check the Fan Groups On X Open Size XX” menu
items. These settings are minimum openings for your inlets with a given number
of fan groups on.
My inlets aren’t responding
to fans going on.
12.2a
Fan groups for exhausting air should be marked Yes for proportional control in the
fan menus.
My Fan On Static Pressure
Below alarm is not work-
ing.
12.3a
The alarm’s delay time must be set for less than the fan run time. The alarm is
checked only when one or more fans set as proportional are running.
My inlets keep moving and
can’t find a proper posi
-
tion.
12.4a
Are you trying to run two groups of static pressure controlled devices at once?
For example, two sets of inlets? Set one to open automatically to fixed positions
(Operating mode: Natural only) and the other to respond to static pressure.
12.4b
Increase the Static Pressure Pause Timer setting in the inlet menu.
12.4c
Full Open and Full Close distances and times need to be set accurately.
12.4d
Setpoint Close and Open may be too tight to the Static Pressure Setpoint.
Static Pressure reading
.250 constantly.
12.5a
The static pressure sensor is not connected to input terminal.
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