Microdrive Series Instruction Manual
4201-109 Rev I
35
1.7
SERVICE
WARNING:
OBSERVE THE SAFETY PRECAUTIONS
DETAILED AT THE BEGINNING OF THIS MANUAL
1.7.1 FAULT FINDING
Faults in the Microdrive will fall into one of three major
categories:
-
Incorrect settings, set-up or adjustment resulting
in unsatisfactory performance.
-
Protective fault operation with resulting display
message.
-
Electrical failure within the Microdrive.
Refer to the Microdrive problem solving chart (fig. 1.7) to
determine your best course of action.
1.7.2 RFI FILTERING
The Microdrive has been designed with an input filter to
minimise radio frequency interference (RFI). An additional
common mode input filter can be fitted if necessary to
reduce RFI even further. Please consult your supplier for
more information.
The Microdrive-3 (UD3) RFI Capacitor Earth Link
The UD3 is fitted with significantly sized radio frequency
filter capacitors. These are connected to earth via a
removable link. Occasionally the charging currents of these
capacitors may trip sensitive earth leakage protection
relays. If necessary the RFI filter capacitors may be
disconnected by shifting the earth link position.
WARNING:
BEFORE PROCEEDING ENSURE THE MICRODRIVE
IS ISOLATED AND STORED CHARGE IS
ALLOWED TO DISSIPATE
The earth link is located near the RFI filter capacitors on the
input of the UD3. It is marked on the PCB by the symbols
E, 0, 1 or RFI OFF, RFI GND. To disconnect the filter earth
connection, shift the link to the position marked 0 or RFI
OFF. To reconnect the filter earth connection, shift the link
to the position marked 1 or RFI ON.
1.6
MAINTENANCE
WARNING:
BEFORE MAINTENANCE
ENSURE MICRODRIVE IS ISOLATED
When situated in the appropriate environment (for the
Microdrive IP rating), the Microdrive is largely maintenance
free. However, in dusty environments, the main heatsink
should be cleaned regularly by blowing down with
compressed air to remove dust deposits. In addition,
occasionally inspect the interior of the Microdrive - any
deposits of dust, particularly on the PCBs, should be
cleaned using a soft brush or (gentle!) compressed air.
Check for any signs of deterioration due to environmental
conditions. Check for corroded components or tracks on
PCBs, signs of condensation or of excessive vibration.
Following inspection, reconfirm normal operation of the
Microdrive.
Summary of Contents for D3-2.5
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