Technical information
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Installation, troubleshooting and maintenance
Luminaire’s installation
Familiarise yourself with the supplied installation instructions and
follow them during installation.
When testing the insulation of an installation, luminaires
equipped with HF-ballasts should have the phase and neutral con-
ductors interconnected. Measurement may only be made between
the interconnected phase neutral conductors and the protective
earth with maximum 500 V direct voltage. Once measuring is com-
plete do not forget to disconnect the phase and neutral conductors
before reconnecting these correctly to the terminal blocks.
What should be done if…
1. The fluorescent lamp does not ignite or the luminaire stays in standby mode?
First check that there is a voltage supply to the luminaire and that there are no short •
circuits.
Check that all the luminaire’s uorescent lamps are working. •
If the mains voltage is too low the uorescent lamp will not ignite. Do not continu-•
ously under run a luminaire, as this can damage the HF-ballast.
Component properties can change drastically in the cold, to a point where the HF-•
ballast no longer functions reliably. The uorescent lamp doesn't ignite safely, or the
HF-ballast immediately enters standby mode. Check the luminaire functions at room
temperature.
2. The fluorescent lamp flashes, does not ignite or goes out haphazardly
There is a uorescent lamp in the luminaire with the wrong output or wrong •
HF-ballast.
Continuous over voltage. Measure the luminaire’s mains voltage. •
A conductor is disconnected or is loose. Check the connections. •
In cold surroundings both the HF-ballast’s and the uorescent lamp’s properties •
change, to the point where the uorescent lamp cannot continue to burn.
Internal wiring between HF-ballasts and lamp holder too long. •
3. The fluorescent lamp’s cathode glows, but the lamp doesn’t ignite
Mains voltage too low. Measure the voltage on the luminaire.•
The starter in a luminaire with a conventional ballast could be defective.•
There is a uorescent lamp in the luminaire with the wrong output/type or wrong •
HF-ballast.
4. The fluorescent lamp’s ends darken or the cathodes flash
Check that the uorescent lamp is intact as set out in point 1. •
A conductor is disconnected or is loose. Check the connections as set out in point 1. •
It is recommended for some HF-ballasts intended for dimming, that the uorescent •
lamp is burnt in for 100 hours before dimming is allowed.
Note that it is perfectly normal for a uorescent lamp’s ends to darken after a long •
period of use, when it approaches the end of its normal service life.
5. There is a reduced fluorescent lamp life
Is the luminaire switched on regularly during the day? A uorescent lamp’s nominal •
life span is based on a three hours burning interval (eight ignitions per day). If, with a
conventional ballast you have signicantly more ignitions, the uorescent lamp’s life
span is shortened appreciably.
There is a uorescent lamp in the luminaire with the wrong output/type or wrong •
HF-ballast.
A bad contact in the power circuit can shorten the life span of the uorescent lamp.•
6. The luminaire gives less light than normal
The mains voltage is too low. Measure the voltage on the luminaire. •
When used in the cold the uorescent lamps luminous ecacy decreases greatly, at •
the same time, the HF-ballast’s properties change.
7. The earth-fault breaker or fuse trips when the lighting is igniting
There could be an earth fault or short circuit in the luminaire group. •
Too many luminaires in the same circuit. •
A measurement instrument connected incorrectly to the power circuit can trip an •
earth-fault breaker.
8. There is a problem with the dimming system
Always check before connecting that the luminaires are intended for the control unit •
used.
Connections for 1–10 V control circuits are marked (+) and (-). Check the polarity. •
If the number of luminaires is large or the control circuit is long, a signal amplifier •
in the control circuit may be necessary. Control circuits for digitally controlled HF-
ballasts have a maximum length of 250 m.
Checklist of actions when the fluorescent lamp does not ignite or
work correctly in luminaires with HF-ballasts:
1. Check that there is a voltage supply to the luminaire. Measure the supply voltage to
conrm it is at the correct level. On a luminaire with a dimmable HF-ballast, also check
the control voltage level, if applicable (analogue 1–10 V DC). Disconnect the control
circuit and check whether the lamp ignites (100 %).
2. Always disconnect the voltage for safety reasons when making the following checks.
On a luminaire with a dimmable HF-ballast even the control circuits should be discon-
nected.
3. Check that the uorescent lamps wattage and type correspond with that on the
luminaire label. Check that the HF-ballast type corresponds with the type stated on the
luminaire label.
4. Check that the uorescent lamp is tted correctly in the lamp holders (that the
uorescent lamp has been turned and fully inserted in the right position). Check the
lamp holders at the same time, making sure that the uorescent lamp makes good
contact (the holders should be well secured to the luminaire). If necessary remove dust,
dirt, grease, etc.
5. Replace a uorescent lamp that does not ignite with a new lamp that is known to
work (even a new uorescent lamp can be defective) and switch on the voltage. In
2-lamp luminaires both uorescent lamps should be replaced using uorescent lamps
known to work.
6. If the uorescent lamp does not ignite, switch o and check the cables for loose
connections. Make sure there is no insulating layer between the connections’ contact
surfaces. Loose connections are usually evident through blackening or soot.
7. Disconnect the supply voltage to the control gear for about 20 seconds and switch it
on again. The HF-ballast is generally designed to disconnect when it senses a defective
uorescent lamp or a break in the uorescent lamp circuit (point 5). The situation is
the same for the HF-ballast, if the uorescent lamp has not been turned in the lamp
holder, to the right position (point 4) or if there is a bad contact in the uorescent lamp
circuit (points 4 and 6). No HF-ballasts from any manufacturer can sense that a uores-
cent lamp has been replaced with a new one without the voltage being disconnected
and reinstated.
Cleaning luminaires
Luminaires should normally be cleaned in conjunction with re-lamping. Reective
surfaces ought to be cleaned when dust and other grime is discovered.
Electrical components or cabling must not be exposed to cleaning agent or water. It
is important to always disconnect the voltage before cleaning the luminaire body.
We stock appropriate cleaning kits. These can be used on all materials, both for
normal and heavy contamination.
A cleaning kit (Cat. no 94759) includes:
1 litre of concentrated general purpose cleaning agent (sucient for about 200 litres •
of mixed solution).
6 general cleaning cloths for wet cleaning.•
1 cleaning leather for wiping o.•
Cleaning instructions (can also be ordered separately from us).•
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