relatively loud click).
To increase the delay time, adjust the potentiometer marked “A” clockwise. After the floodlight relay times
out, repeat the cycle until the desired time is achieved. Re-connect the photocell wire to terminal No. 7.
special note:
Do not use the MANUAL-ON button on the FC-9 annunciator plate to set the entry delay
time. On the CF-2C (Issue 5), the MANUAL-ON button on the FC-9 instantly activates the floodlight
timer, bypassing the entry delay timer circuit.
A
DJUSTING
F
LOODLIGHT
T
IME
See Figure 5. The amount of time the floodlights remain on after the system is tripped may be adjusted from
15 seconds to 15 minutes. The normal floodlight time is 5-10 minutes.
To set the floodlight time, remove the photocell wire from terminal No. 7. Push the TRIP-TEST button.
Measure from the moment the floodlight relay clicks on to the moment it clicks off. Adjust potentiometer
"B" (clockwise for time increase) and repeat until desired time is achieved. Reconnect the photocell wire to
terminal No. 7.
A
DJUSTING
P
HOTOCELL
S
ENSITIVITY
See Figure 5. Photocell sensitivity determines the level of outdoor light at which the lights are allowed to
come on. The factory sets the floodlights to come on at dusk.
To set the photocell sensitivity, make all adjustments at the precise moment when the amount of daylight is
visible at which time you want the floodlights to come on. Adjust potentiometer "D" counter clockwise in very
small increments and push the TRIP-TEST button after each adjustment (see page 5). Stop adjusting at the
point where the floodlight relay clicks on. The floodlights will be allowed to turn on at that same daylight level
from then on.
A
DJUSTING
P
ROBE
S
ENSITIVITY
See Figure 5. Probe sensitivity is set at the factory and does not usually need to be adjusted. Factory setting
allows a single standard probe to cover a 12 foot wide driveway when installed beside it). Increasing the
sensitivity above the factory setting is not recommended unless the probe is located in a low sensitivity area.
When the probe is placed in the center of a driveway that is 18 feet wide or less, the sensitivity may be
decreased considerably, allowing the probe to be installed close to highway traffic, power lines, etc.
To adjust probe sensitivity, turn the potentiometer "G" clockwise to increase, counter-clockwise to decrease.
A typical setting should be such that the CF-2C reliably detects a small car going 5 MPH. You may increase
sensitivity if necessary. Be aware, increasing sensitivity may cause false alarms.
A
DJUSTING
T
RANSIENT
S
UPPRESSOR
See Figure 5. The factory setting for the transient suppressor circuit potentiometer "H" is in the "on" position
(fully clockwise). In this setting, short duration transient signals will be ignored. With the circuit activated, false
alarms from lightning will be reduced.
Note: if the probe sensitivity cannot be properly set as described in the "Adjusting Probe Sensitivity" section
above, turn off the transient suppressor by adjusting potentiometer "H" full counter-clockwise.
F
IELD
T
ROUBLESHOOTING
Preferred does not provide schematic diagrams or service manuals for our products. However, we try our
best to provide technical support through our 800 number and fast repair service for our products.
Before calling Preferred, refer to the “
Special Note
” sections under the following headings:
Initial power-up and exit delay, page 4;
Purchasing ground rod, page 5;
Using Probe Fault Mode to
test circuit board, page 5;
Entry delay time, p. 7.
When trouble-shooting a CF-2C system that is false alarming, check the ground system. House electrical
panel grounds can cause transient feedback that could cause false alarms.
To determine if false alarms are board related or probe system related, disconnect the probe and connect a
www.GateOpenerSafety.com | (800) 878-7829 | [email protected]
