Troubleshooting Guide


SYMPTOM


CORRECTIVE ACTION
LAMPS WILL
NOT OPERATE
1. Make sure lamps are properly seated in sockets.
2. Replace blown lamp(s).
3. Reseat or change starter (preheat only).
4. Verify that fixture is wired properly.
5. Verify that fixture is grounded (all fluorescent fixtures must be
    grounded).
6. Test ballast.

SLOW or ERRATIC
STARTING

1. Check ground (fixture must be grounded for reliable starting).
2. Check ballast label for correct lamp and verify that correct lamp is
    installed in the fixture.
3. Verify that fixture is wired properly.
4. Check for low supply voltage.
5. Be sure all lamps are properly seated in sockets.
6. Test ballast.
 
BLINKING, “SNAKING”, or FLICKERING 1. Turn fixture on and off several times at one-half hour intervals.
2. Check ambient temperature and change to ballast rated for conditions
    if below 50°F.
3. Check for fans or air conditioner blowing across lamps.
4. Verify that fixture is wired properly.
5. Allow fixture to remain on for 24 - 48 hours. This will allow proper
    “seasoning” of the lamps.
6. Check supply voltage.

REDUCED LIGHT
OUTPUT

1. Check for ambient temperature significantly above or below 77°F.
2. Check for fans or air conditioning blowing across lamps.
3. Verify that fixture is wired properly.
4. Test ballast.
 
RADIO INTERFERENCE 1. Move electronics at least 10 feet from lamps.
2. Install Radio Interference Filter.
3. Improve equipment grounding or install shielded grounded radio
    antenna.
4. Install a fixture with an electronic ballast.

REPEAT CYCLING
(ON/OFF)

1. Check ballast label for correct lamp and verify that correct lamp is
    installed in the fixture.
2. Verify that fixture is wired properly.
3. Check voltage supply.
4. Check for high ambient temperatures. Ventilate or suspend fixture.
5. Test ballast.
 
FIXTURE “HUMS” 1. Verify that ballast is securely fastened to ballast housing.
2. Verify that fixture is grounded properly.
3. Allow fixture to remain on for 24 - 48 hours. This will allow proper
    “seasoning” of the ballast.
4. Install a fixture with an electronic ballast.