Service Manual

GSM-204-523
General maintenance procedures
31st Oct 01
Maintenance Information: Horizon macro outdoor
68P02902W04-A
CONTROLLED INTRODUCTION
Maint. 2–5
General maintenance procedures
Type of
procedures
The general maintenance procedures involve the following:
 Cleaning air inlet and outlet grilles.
 Checking and cleaning fans (only necessary if an overtemperature alarm
has occurred).
 Checking normal operation.
 Mechanical inspection of the cabinet, including inspection and lubrication
of locks and hinges.
 Periodic check of the installation.
WARNING
Potentially lethal voltages and high energy sources are
present in the cabinet when the external ac mains isolator
switch is set to the on position and/or batteries are
connected. Remove rings, watches and jewellery before
starting these procedures, and exercise extreme caution
when working on the equipment.
Assumptions -
door, lid and
TMS front cover
Any requirement to open or close a door, a lid, or remove/refit a TMS front cover
is assumed in the following procedures. Shutting the door or the lid is assumed
at the end of any procedure. Detailed descriptions of cabinet access procedures
are given in Maintenance support procedures.
Cleaning inlet
and outlet
grilles
Air is drawn in and expelled through the TMS front cover grille, at the base of
the front of the cabinet.
The following procedure should be followed to clean inlets, ducts and outlet
grilles:
 Open the cabinet doors and examine door ducts and recirculation air
apertures. Clean as necessary, taking care to avoid damage.
 Remove the TMS front cover and clean the grilles as necessary.
 Examine the TMS unit ambient air inlet and outlet grilles. Clean as
necessary, taking care to avoid damage.
 Use a brush to ensure the area under and around the TMS is clear of
debris.
 Refit the TMS front cover.
 Close the doors.