Fault Diagnosis 14
Revision 2.0c – 30 August 2013 HPC User Manual
6.0 Fault Diagnosis
NOTE
Contact your authorised JANDS Distributor for repairs or servicing.
In Australia refer all repairs to an authorised JANDS service agent or
return the faulty unit in suitable packaging to:
JANDS PTY LTD Service Dept,
2-26 Kent Rd
Mascot NSW 2020
Australia
6.1 Output protection
Each of the output circuits is protected by a fast-acting thermal/magnetic circuit
breaker. These breakers are designed to pass the rated current, but will disconnect the
output circuit for any overload condition (the larger the overload, the quicker the
disconnection). If a circuit breaker trips there’s either a fault which should be rectified
or the channel is overloaded.
6.2 Thermal Protection
The HPC dimmers feature temperature-controlled fan cooling. As the internal
temperature of the dimmer increases, the fan speed increases. The inlet and exhaust
areas of the chassis must be kept clear while the HPC is on.
The HPC continuously monitors the internal heatsink temperature. As the temperature
approaches the rated maximum the internal processor attempts to reduce the heat
build up by reducing the output levels. If the temperature continues to rise the dimmer
will shut down the output drive, however this should only be necessary if there is
inadequate ventilation or if the ambient temperature is above the rated maximum.
Refer to Section 7.1 Ventilation regarding HPC ventilation requirements.
6.3 Neutral-Earth Detection
The HPC includes a fault detector that monitors the Neutral-Earth (N-E) voltage – in
normal operation there should be little of no voltage difference between the Neutral
and Earth. If the voltage exceeds a predetermined amount the outputs are turned off.
The N-E fault detector may be disabled in the menu.
To Next Page
Loading...
Need help?
General
