Troubleshooting Chart
Problem
Cause
Solution
Fuse blows when
Load exceeds fuse rating.
Reduce load to within fuse rating.
power is connected.
Photo control is incorrectly wired.
Check wiring.
Short in wiring.
Load lamp blinks
Photo control is incorrectly wired.
Rewire as shown in wiring diagram.
during the day, but is
on at night.
Load lamp blinks at
Too much light is striking photo eye.
Reorient or relocate photo control.
night, but is off during
Light from load is shining or being reflected
Relocate or reorient light source.
the day.
on eye of photo control.
High pressure sodium lamp is at end of life.
See high pressure sodium note below.
Load stays on.
Line voltage is exceptionally low.
Have power company check voltage at control.
Photo control is not rated at voltage being used.
Replace control with unit of correct voltage
Contacts are welded due to excessive load.
Replace control and connect only rated load.
Not enough light strikes photo control eye.
Reorient or relocate photo control.
Load stays off.
Lamp and/or ballast is burned out.
Replace lamp and/or ballast
Line voltage is exceptionally high.
Have power company check voltage at control.
Photo control is not rated at voltage being used.
Replace control with unit of correct voltage.
Too much light strikes eye of photo control at night.
Reorient or relocate photo control.
Photo control operates
Contacts are welded due to excessive load.
Replace photo control and connect only rated
normally for a short
load or smaller.
time, then remains on.
Photo control fails to
Photo control damaged by lightning or other high-
Replace photo control. Consider installing “LA”
switch off and photo-
energy transient.
Model Control, lightning arrestor or surge
cell shows evidence of
protection device in circuit.
burning or arcing
across serpentine
pattern.
High pressure sodium
With these lamps the end-of-life failure mode is one
Replace lamp and/or ballast.
or mercury vapor end-
of cycling (the initial cycling period may be as
of-life failure.
long as one-hour but will shorten to as little as one
minute).
IMPORTANT NOTE:
The load being controlled by your photo
control will be on even if installation is done
during daylight hours. Allow a few minutes for
the photo control to operate and turn the
load off.To test the control in daylight, cover
the photo eye completely and wait for the
load to switch on (up to five minutes may be
needed). If this does not work, switch breaker
off and wait ten minutes. Switch breaker on.
The load should be on.
If within three (3) years from the date of purchase, this product fails due to a defect in material or workmanship, Intermatic Incorporated will repair or replace it,
at its sole option, free of charge. This warranty is extended to the original household purchaser only and is not transferable. This warranty does not apply to: (a)
damage to units caused by accident, dropping or abuse in handling, acts of God or any negligent use; (b) units which have been subject to unauthorized repair,
opened, taken apart or otherwise modified; (c) units not used in accordance with instructions; (d) damages exceeding the cost of the product; (e) sealed lamps
and/or lamp bulbs, LED’s and batteries; (f) the finish on any portion of the product, such as surface and/or weathering, as this is considered normal wear and
tear; (g) transit damage, initial installation costs, removal costs, or reinstallation costs.
INTERMATIC INCORPORATED WILL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. SOME STATES DO NOT ALLOW THE
EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO
YOU. THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES. ALL IMPLIED WARRANTIES, INCLUDING THE WARRANTY
OF MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY MODIFIED TO EXIST ONLY AS CONTAINED
IN THIS LIMITED WARRANTY, AND SHALL BE OF THE SAME DURATION AS THE WARRANTY PERIOD STATED ABOVE. SOME STATES DO NOT
ALLOW LIMITATIONS ON THE DURATION OF AN IMPLIED WARRANTY, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
This warranty service is available by either (a) returning the product to the dealer from whom the unit was purchased, or (b) mailing the product, along with proof
of purchase, postage prepaid to the authorized service center listed below. This warranty is made by: Intermatic Incorporated/After Sales Service/7777 Winn Rd.,
Spring Grove, Illinois 60081-9698/815-675-7000 http://www.intermatic.com Please be sure to wrap the product securely to avoid shipping damage.
INTERMATIC INCORPORATED
SPRING GROVE, ILLINOIS 60081-9698
158KP12068
