Ampetronic d series, Installation And User Manual

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Ampetronic D Series Installation Handbook & User Guide Page 36
Failed AC power fuse in rear of unit
Unplug the loop and AC power supply from amplifier, and replace the failed fuse with the spare fuse
in AC power input fuse tray .
Reconnect the AC power supply and switch on . If the fuse fails again, return the unit to Ampetronic
for evaluation - it may well be covered under warranty, which will be invalidated by removing the
cover . If the fuse does not fail a 'loop error' may be indicated, but shows that the unit is working
correctly . Re-connect the loop and switch the power off then on again to reset loop error .
If the fuse fails when the loop is re-connected to the unit, then the loop could be shorted to
electrical mains (and building) earth. This can happen even if no audio signal is present, as the
short to earth is likely to cause an instability / oscillation / feedback condition to develop . A loop
cable short to earth most commonly occurs where flat copper tape is installed on a metal-clad
raised access flooring system. If the insulation on the flat copper tape is abraded (for example by a
piece of metal swarf trapped below the copper tape), the conductor could short to the earthed tiles.
When installing on raised access floors, it is advisable to insulate beneath the flat copper tape
installation using Ampetronic PWT or similar tape .
The loop short to earth may only be completed when a person steps on the tape in the affected
location, which can create significant difficulties when diagnosing the cause of fuse failure. Contact
Ampetronic for further advice if a unit is suffering recurring but untraceable failure of the rear panel
fuse .
14. UPDATING FIRMWARE & WEB INTERFACE
N.B. Driver firmware and Web Interface software must be updated at the same time as the
version must match .
Updating Firmware
a) Contact Ampetronic for the appropriate version to copy to a USB Stick.
b) Insert USB Stick into rear of unit and power up,
c) Wait for the display to show ‘PLS REMOVE STICK AND CYCLE POWER’
Updating Web Interface
a) Contact Ampetronic for the latest .bin file
b) Browse to the IP Address of the Web Interface and enter the URL extension /mpfsupload
c) Choose file and upload
d) Wait for the message ‘MPFS Update Successful’ to be displayed and follow the ‘Site main page’
link
15. ACCESSORIES
Rack mounting unit blank
10mm wide, 0 .1mm / 18mm wide, 0 .25mm / 20mm wide, 0 .15mm thick copper cable/tapes
Direct Burial Cable
Printed Warning Tape
WiFi Kit (Nano Router, Battery, USB cable, Ethernet cable)
Details of all products and services provided by Ampetronic can be found at www .ampetronic .co