Display On Ballast Unit; Protective Circuits In The Ballast Unit - Broncolor HMI F1600 Mode D'emploi

8. DISPLAY ON BALLAST UNIT

Mains switch (2)
Illuminated: mains voltage is present. The unit is switched on.
Not illuminated: The unit is switched off or not connected to the mains voltage.
Indicator for earth conductor (3)
Illuminated: The unit is switched on and the earth conductor is correctly connected.
Not illuminated: The unit is switched off or the earth conductor is not correctly connected.
Lamp control display (4)
Illuminated: The lamp is switched on and the unit is functioning correctly.
Not illuminated: The lamp and/or the ballast unit is switched off or not connected to the mains
supply.
(5a–c) operating mode display
(7a, b) display shows that the lamp has been identified

9. PROTECTIVE CIRCUITS IN THE BALLAST UNIT

The HMI 800.1600 ballast unit features monitoring electronics with detailed fault diagnosis.
Overvoltage protection: If the applied voltage is greater than 260 V, the ballast unit either
switches off automatically, or cannot be switched on. Button (4) blinks to indicate this.
Low-voltage protection: If the applied voltage is below 90 V, the ballast unit either switches off
automatically, or cannot be switched on. Button (4) blinks to indicate this.
Current limitations: When a 1600 W lamp is operated on a mains voltage below 95 V, the lamp
output is automatically reduced to prevent the current exceeding 18 A. Button (7a) blinks to
indicate this. Should the voltage rise above 95 V again during operation, the output will remain
unchanged at the reduced level, so as to avoid continual changes in lighting.
Thermal monitoring: If the operating temperature of the unit is exceeded, the ballast unit
automatically regulates the output gradually down to max. 50 %. This lowering of the output
allows the user time to recognise the situation and to prevent or delay a total shutdown. If a
shutdown occurs, for safety reasons, the unit does not automatically switch on again. The lamp
must be switched on again manually.
Igniter circuit protection: If the bulb fails to trigger, ignition is blocked for 30 seconds after
about ten attempts at ignition in succession.
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