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LICHTTECHNIK
6. Trouble Shooting 6.1 Does supply voltage correspond with ballast required voltage? Dual voltage
Guide ballasts are autoswitching.
6.2 Connect ballast to power supply and test earth (LED “PE” has to be on).
6.3 Check power supply: The three LEDs "L1", "L2" and L3" must be lit to show that all
three phases are supplied with line voltage. The red LED "MAINS FAULT" indicates that
the Ballast switched off due to line overvoltage ( >270V
eff
against neutral). Possible
cause may be the exchange of one phase with the neutral wire. The ballast will stay in this
protection mode until it is disconnected from mains.
6.4 Ensure correct lamp is fitted with correct distribution and cables.
6.5 Ensure ON/OFF Switches are in "OFF" position. Connect the lamp heads with ARRI
Splitbox 575-Six to the ballast.
Set ON/OFF switches to "ON".
After approx. 1 seconds lamps should ignite.
6.6 If lamp does not strike, the lamp heads safety switch may be broken - check if lens
door is fully shut and the lens safety switch is activated.
6.7 Is there a good power supply to the ballast?
6.8 If a ballast / multicore cable / splitbox / luminaire does not work then all four units
should be considered faulty.
Do not try a suspected luminaire with another ballast - you may end up with two faulty
ballasts!
To check if a ballast is good, run it with a known good luminaire and known good
multicore cable and splitbox.
6.9 If a module cuts out after running a few minutes there are a number of possible
failures:
l The lamp itself may be faulty or at the end of its life.
l The thermal cutout in the module may have activated due to extreme ambient
temperature or exposure to direct sunlight in hot summer conditions.
l The ventilation might be restricted. In such a case the ballast can be used after it had
cooled down and the condition causing the overheating is removed.
l If the power supply exceeds the limits or has spikes or dropouts the ballast switches
off to protect itself. If running on a generator the output for all three phases should be
regulated between 95 - 260V~ (against Neutral).
l Earth leakage of luminaires or head to ballast cables will also cause the protection
circuit to be activated. Test the module with a known good luminaire. If cables are
suspect, they should be exchanged with known good cables.
If a ballast is found to be faulty ideally it should be returned together with the luminaire,
multicore cable and splitbox to the ARRI-service location for examination.