Trouble Shooting Check Chart for
Medium Pressure |
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| Symptom | Possible Cause | Corrective Action | ||
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| End of Life | Replace lamp | |||
| Poor Socket Contact | Check lamp for tightness in the socket | |||
| Low Supply Voltage | Check if primary input is <10% of rated primary voltage of ballast. If so, correct regulation | |||
| Low Socket Voltage | Check ballast tap and connections | |||
| Failed Ballast | Replace ballast | |||
| Abnormally Low Ambient Temperature |
Use ballast rated for low temperature operation | |||
| Defective Igniter | Replace igniter | |||
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| Over wattage/excessive lamp current loading (may be evidenced by burnt seals, melted connector, bulged arc tube or discolored bulb.) This happens due to: | ||||
A. |
Use of failed or improper ballast | Replace ballast or lamp to make them compatible | ||
B. |
Ballast wrong for supply voltage and frequency | Used ballast compatible with supply voltage and frequency | ||
C. |
Shorted
capacitors (for constant wattage and constant watt auto-transformer circuits) |
Replace capacitors | ||
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| Failing ballast | Replace ballast and use compatible ballast | |||
| Low ballast open circuit volts | Replace ballast and use compatible ballast | |||
| Supply voltage di | Do not allow supply voltage to dip below -10% of rated primary volts of the ballast | |||
| Poor electrical connection | Check contacts and wiring | |||
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| Insufficient open circuit voltage, hard starter |
Check supply voltage, starter. Replace lamp |
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| End of life depreciated lamp | Replace lamp | |||
| Wrong Lamp for Ballast | Use matching ballast | |||
| Incorrect tap or low supply voltage | Correct tap-connection, regulate supply voltage per ballast requirements |
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| Dirty lamp or fixture | Clean lamp and fixture routinely | |||
| Early blackening or bulging of arc tube, caused by over wattage, incorrect ballast, etc. |
Match tap connection to line voltage, use matched lamp and ballast |
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| Failed capacitor | Replace capacitor | |||
