3
Installation Troubleshooting Chart
Symptom Possible Cause Suggested Remedy
No Power Opening. No power to control box/blown
fuse.
Verify 120VAC 60HZ power is present at terminals 3 & 4 on
control box terminal strip. Check fuse. Replace only with 5 amp
(3AG type) fuse.
Actuator(s) not connected
properly.
Be sure a timer module board is rmly in place in “A,” “B” & “S”
slots. Operate actuator(s). LED on timer module should light
when actuator is used. If not, briey short actuator terminal in
the control box. If LED lights, check wiring to actuators for an
open circuit. If it does not light, check for voltage at terminals 9
&10. Voltage should read from 11.75 to 13.25V DC. If there is no
reading, disconnect leads from terminals 9 & 10. Short actuator
terminals. If LED lights, check for short circuit in actuators.
Fire alarm system causing open
circuit on terminals 1 & 2.
Shunt terminals 1 & 2 with power off. Restore power. If control
operates when actuator terminals in the control box are shorted,
an open circuit exist in wiring to re alarm. When Auto-Equalizer
is not used with re alarms, terminals 1 & 2 must be permanently
shorted with a shunt.
IMPORTANT! When Auto-Equalizer is connected to re alarm,
make sure shunt is removed from terminals 1 & 2. Terminals 1 &
2 are one leg of 120V line.
No input to Auto-Equalizer
operator.
Disconnect tubing from Auto-Equalizer operator. Try actuator and
verify that air is coming out of tubing. If not, trace tubing to control
box, checking for breaks or kinks in air line.
Air lines obstructed with dirt or
ice.
Clean or thaw lines and reroute if necessary. Eliminate dips near
cold zones. If freezing is a repeated problem, desiccant lter may
need to be changed.
Air valves not working. Make sure air valve leads are plugged into main board. (Be sure
valves in system are plugged into connectors “A” & “B”.)
Low or no air inlet pressure to
control box.
Check compressor output to make sure air shut-off is open. 80
psi must be available at the control box. If not, check compressor
and lines.
No air output to Auto-Equalizer
operator.
Check pressure gauge in control box. Adjust as required, if
necessary. Check for leaking or damaged lines in control box.
Power opening will not time
out.
Scanner maintaining signal to
control box.
Make sure lenses are clean and there are no obstructions in front
of scanner. Model 909 or 939 proximity scanner may “see” an
opposite wall. Adjust range as described earlier.
Switch circuit maintaining
contact.
Check for short circuit or error in wiring to actuator.
Air valve blocked open with
contaminant.
Cycle valve several times by momentarily shorting actuator
terminals. This should clear valve.
Control box exhaust restricted. Exhaust mufer may be clogged. Clean in alchohol or mineral
spirits.
