Installation
5-1
WMX SERIES DIMMER
OPERATING
MANUAL
5.0 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 Service Dept,
Unit 2 / 26 Kent Rd
Mascot NSW 2020
Australia
5.1 Output
protection
Each of the twelve output circuits is protected by a 10 Amp 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).
NOTE: 3-pin GPO outlet sockets are rated at 10 Amps. Dimmer channels should
not be loaded beyond the socket capacity.
The breakers protect the dimmer’s output devices from short-circuit loads, faulty wiring
looms and save on expensive dimmer repairs. A tripped circuit breaker indicates a load
fault that requires immediate attention.
If a short-circuit lamp or output cable is plugged into the dimmer, the breaker will trip
to disconnect the fault from the dimmer. In nearly all circumstances, this is quick
enough to prevent damage to the output devices.
In some circumstances however, a triac failure may be experienced, although these
devices are usually quite reliable and robust. If a triac does fail, it will either turn a
channel on to full (triac short-circuit), or turn it off (triac open-circuit). If a triac fault
should occur, that channel may be isolated by manually tripping that channel’s circuit
breaker.
These breakers have been specified for electrical protection, reliability and safety. They
will allow repeated turn-on surges to cold lamps without failure, while still protecting
the triacs. The breakers will interrupt large short-circuit fault currents without damage.
5.2 DMX
faults
The WMX dimmer features an “Output Hold” facility that “remembers” the last
received DMX message. In the event of a cable being unplugged or severed, the WMX
dimmer rack will continue to output the “Held” DMX levels until a new DMX message
is provided. If no new data is received within 10 minutes the outputs are driven to 0.
The
DMX
LED will flash slowly if the DMX signal is removed.
Note that control consoles, when powered down, may transmit spurious DMX data
which can unintentionally cause dimmer channels to turn on. Disconnect mains power
when not in use.
Summary of Contents for WMX
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