ETC Matrix MkII Rack - Manual (Page 24)

Matrix Mk.II Rack Installation Manual
Appendix A
Troubleshooting
Power loss
Total power failure
If all power to the rack fails (if it is not already obvious, the processor’s three phase
indicators will be off when there is a total power loss) initially check if the main
supply breaker has tripped. If not, check if there is any other equipment supplied
from the same source and whether or not that is working correctly. If other
equipment is working correctly, trace the supply route back to where the supply
splits to the rack and investigate the cause for the loss at that point.
Single or dual phase failure
Due to Matrix II’s distributed fusing design within the rack, a loss of one or two
phases could be caused by several different faults.
o If the processor indicates a phase has been lost, and yet all modules in the rack
are displaying power on, switch off all power to the rack and check the processor
supply fuses at the rear (top row of the fuse panel).
o If the processor indicates a phase has been lost, and the corresponding column
of modules appear to have switched off (indicator LEDs are off), check the mains
supply for a tripped phase breaker or fuse.
Single module power failure
If all power is lost to one module only, initially check the module supply fuse (63A)
on the Matrix fuse panel (only check with the main power off) and replace it if
necessary.
Single channel power failure
If there is no output from one channel only (this will be reported by DimSTAT, on
the Processor and the module), it can indicate that the MCB or RCBO has tripped,
or there is an electronic failure within the module.
RCD tripping
RCD tripping on installation
If an RCD trips during initial testing of the rack, it is almost certain there is a load
wiring problem. It is vital that both the live and neutral conductors of each channel
are routed together and connected to the corresponding phase and neutral outputs
from the same module. If the cause is not obvious, check first that there is no load
plugged into the circuit (the load may be at fault). With the load wiring isolated,
check there are no loose strands between terminals that could allow a leakage
current between the phase, neutral or earth connection.
RCD tripping after previously working correctly
Check that the load plugged into the circuit is not at fault by performing a PAT test
on the luminaire. If the load is not at fault, recheck the circuit to make sure there
isn’t another load connected in parallel which could be experiencing a leakage
current between L and E or N and E.