Jands FP12, Руководство по эксплуатации

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Fault Diagnosis 5-2
Revision 0.1 – 3 June 1999 FP12 DIMMER USER MANUAL
5.3 Phase fault indication
The three blue PHASE LEDs will show when all three power input phases are present.
WARNING
IF ONE OR MORE PHASE LEDS IS OFF, IMMEDIATELY DISCONNECT
POWER TO THE DIMMER AND CHECK THE MAINS SUPPLIES AND
WIRING BEFORE RE-CONNECTING POWER TO THE DIMMER.
Although the dimmer will survive most power supply faults, indications of unusual or
potentially dangerous power conditions should never be ignored.
5.4 Thermal protection
The FP12 dimmers feature temperature-controlled fan cooling. As the internal
temperature of the dimmer increases, the fan speed also increases.
The internal heatsink temperature is constantly monitored by the dimmer. If the heatsink
temperature rises above the specified maximum, the dimmer will automatically shut
down the output drive. The fan will continue to cool the heatsink during the shut down
period.
The electronic shutdown is backed up by a buried cutout, which shuts down power to all
electronics other than the cooling fan should the temperature continue to rise.
Even though the FP12 is a fan-cooled dimmer, it is very important that adequate
ventilation is provided when in use, particularly around the sides of the chassis. If air
circulation to the air vents is blocked and/or the ambient air temperature is too high, the
dimmer will shut down and the status LED will flash until the temperature is reduced.
Refer to section 6.1 Dimmer Ventilation regarding FP12 ventilation requirements.
5.5 Over-voltage
The FP12 incorporates an over-voltage cutout that constantly monitors the incoming
mains voltage. If the mains voltage rises above the specified maximum the dimmer will
shut down and the status LED will flash until the over-voltage condition is removed.