Unit installation

using the LED display

If an LED bulb does not light after you replace a UV lamp, you

need to verify the electrical output of the ballast connected to that

specific UV lamp. This is done by testing the ballast open circuit

voltage. This should be done by an electrician or qualified

facilities personnel. Follow these recommended procedures:

1. Turn power “off” to the UV unit.

2. Remove the socket cover.

3. Identify the “faulty” UV lamp which corresponds to the

number on the LED display.

4. Remove the lamp socket(s) from the “faulty” UV lamp base.

5. Use a voltmeter and set an operating range at >700 VAC.

6. Measure the open circuit voltage:

For single-ended (SE) UV lamps: connect the voltmeter across

the receptacles of the lamp socket.

For double-ended (DE) and high temperature (HT) UV

lamps: connect one end of the voltmeter to one end of the lamp

socket and the other end of the voltmeter of the opposite end of

the lamp socket.

7. Turn power “on” to the UV unit.

8. Record the reading.

9. Turn power “off.”

10. Listed below please find the open circuit voltages for the

various ballasts:

If the voltage reading is zero or a number above or below the

acceptable ranges, this indicates a ballast fault, and the ballast

connected to the “faulty” UV lamp must now be replaced.

If the voltage reading is within acceptable ranges but the LED

does not light, the LED board has failed and needs to be replaced.

Refer to the Replacement Parts Lists in the back of this manual to

identify the proper ballast and/or LED part number.

UV Lamp Operational Display Panel

Ballast type

120 Volt Electronic 240 Volt Magnetic 240 Volt HE

550-650 575-675 450-660

CAUTION! AvoidCAUTION! Avoid

CAUTION! Avoid

touching the lamptouching the lamp

touching the lamp

tip after you re-tip after you re-

tip after you re-

move the lampmove the lamp

move the lamp

socket. This is asocket. This is a

socket. This is a

shock hazard.shock hazard.

shock hazard.