Fuse blows when power is connected. 1

Load lamp blinks during the day, but remains on at night. 2

Load lamp blinks at night but remains off during the day. 3

Load stays on. 4

Load stays off. 5

Photocontrol operates normally for a short time, then remains on. 6

5

Line voltage exceptionally high.

Consult local utility to check voltage at photocontrol and take steps to correct the condition.

4

Line voltage exceptionally low.

4 5

Photocontrol not rated at voltage being used.

Replace photocontrol with unit of correct voltage rating

4 6

Contacts welded due to excessive Load.

Reposition photocontrol and connect only the permissible load

4

Not enough light strikes “eye” of photocontrol in daytime.

Replace photocontrol in direction of the greatest amount of natural light.

3

Light from the load is directly or indirectly shining on “eye” of photocontrol

Reposition photocontrol so that it is not subject to artificial light sources.

1 2 3 4 5

Incorrect wiring

Refer to wiring diagram.

Precision photocontrols are designed for trouble-free performance. Their basic components consist of a light-sensitive photocell and either a thermal style or a relay type switch. The cell measures the amount of light present, when it falls below a prescribed foot candle level, the cell turns outdoor lighting “on”. When the required amount of light is present again, the cell turns lighting “off”. There is nothing to set or adjust.

Installation:
Important installation considerations when installing a Precision photocontrol:
1. Always turn off the power at the fuse or breaker box before installing your photocontrol.
2. Be sure to position your photocontrol so that the light sensitive “window” is turned in the direction of the greatest amount of natural light. While not essential to the control’s operation, a northern orientation assures a more uniform turn-on and turn-off. Rows of trees, close buildings, etc., directly in front of the “window” will cause lights to turn on at too high a light level. Also, if the control is located where it is subjected to artificial light sources higher than its turn-on value,lights will not turn on at night.
3. Make sure that your photocontrol voltage rating matches the line voltage supply to be used
4. Wire photocontrol by following the appropriate wiring diagram below. Be sure to comply with national, state and local electrical codes.