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3.19 Fault finding
-tube blackening,
-lamp type and wattage must correspond to that required by ballast label,
-lamp orientation designation incorrect for application (base up, base down).
1B:Visual inspection of components
-damaged ballast, starter or capacitor,
-evidence of moisture or excessive heat,
-loose, disconnected, pinched or frayed leads,
-incorrect wiring,
-ballast, starter and capacitor must correspond with lamp type and lamp wattage for the actual mains supply voltage.
1C:Visual inspection of installation
-incorrect wiring,
-blown fuses, switched circuit breakers or contactors,
-hot cables,
-damaged lampholders.
1D:Visual inspection of mains supply
Verify that the correct line voltage is being supplied and that phase and neutral are connected in accordance with the the wiring diagram.
2: Quick fix for restoring lighting
After the visual inspection and repair, replace any defective component, starting with the lamp and
3:Trouble-shooting checklist
When, after following points 1 and 2, a failure still exists, some tests will have to be carried out.
Fault I: lamp shows bright flash and does not ignite again.
• Possible cause:
-no ballast, incorrect ballast,
-capacitor across the lamp instead of across the mains.
Fault II: newly replaced lamp does not ignite.
• Action:
-disconnect starter and measure mains voltage and
-if equal, replace the starter,
-if not equal, replace the ballast,
-if equal and not igniting with new starter and lamp, check lampholder and circuit contacts.
Fault III: lamp remains in glow stage, does not ignite properly or only lamp ends (electrodes) do emit some light.
• Possible cause:
-lamp was damaged in previous overload,
-starter defect or
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