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REPLACING LAMPS

When replacing a lamp connected to an CD-250, use the Air Gap Isolation feature 
for safety. If you have more than one CD-250 controlling one or various loads in 
a multi-way wiring confi guration, apply the instructions below to all CD-250s for 
safety.

1.   Push in the Air Gap Switch shown in Figure 5 so that it clicks and locks into a 

depressed position below the surface of the rest of the CD-250. This engages 
the Air Gap, which stops electricity from fl owing to the connected load.

2.  After replacing the lamp(s), press the Air Gap Switch so that it returns to a 

position that is fl ush with the surface of the rest of the CD-250. This allows the 
dimming sensor to control the lighting load correctly.

3.  The CD-250 then calibrates its dimming range to the load’s wattage rating by 

briefl y dimming the load up and down from its minimum output (approx. 10%) 
to its maximum.

TROUBLESHOOTING

Check the position of the Air Gap Switch on all CD-250s before beginning 
troubleshooting.

Lighted switch is OFF, no load response to ON/OFF/DIM button(s) press or to 
any of the RH-253 momentary wall switches (if applicable):

•   Make certain that the circuit breaker is on and functioning.

  Lighted switch is ON, no load response to ON/OFF/DIM button(s) press or to 

any of the RH-253 momentary wall switches (if applicable):

•   Check the controlled dimmable lighting load(s). Make sure that the load(s) 

connected to the CD-250s is (are) between 25- 500 watts.

•   The lighting load (s) may not appear to be ON if the last used dimming level 

was very low. To verify if this is the case, fi rmly tap the ON/OFF/DIM button 
one time. The amber LED should turn off. Next, press and hold the ON/OFF/
DIM button to turn UP the lighting level. If the lights do not get brighter, call 
technical support.

Load will not turn OFF automatically:

•   Press the ON/OFF/DIM button. If the controlled load turns OFF, go to next 

step.

•   The time delay can be set from 15 seconds to 30 minutes. Check the time 

delay setting for each CD-250 in your multi-way confi guration. Ensure that all 
CD-250s have the same time delay setting. Ensure that there is no movement 
within any of the sensors’ view for the set time period. Hot air currents and 
heat radiant devices can cause false detection. Make sure the sensor is at 
least 6 feet (2 meters) away from devices that are a signifi cant heat source 
(e.g., heater, heater vent, high wattage light bulb).

If load does not respond properly after following troubleshooting, turn OFF 

power to the circuit then check wire connections or call technical support.

COVER PLATES

WattStopper CD wall switches fi t behind industry standard decorator style switch 
cover plates.

WARRANTY INFORMATION

WattStopper warranties its products to be free of defects in materials 
and workmanship for a period of five (5) years. There are no obligations 
or liabilities on the part of WattStopper for consequential damages 
arising out of, or in connection with, the use or performance of this 
product or other indirect damages with respect to loss of property, 
revenue or profit, or cost of removal, installation or reinstallation.

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2800 De La Cruz Boulevard, Santa Clara, CA 95050

Technical Support: 800.879.8585 • www.wattstopper.com

09566r2 9/2010

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