Service Manual

GSM-204-523
Replacing a heater mat
31st Oct 01
Maintenance Information: Horizon macro outdoor
68P02902W04-A
CONTROLLED INTRODUCTION
Maint. 4–11
Replacing a heater mat
Introduction to
heater mat
replacement
The auxiliary equipment housing contains four heater mats; mounted on each
battery tray. Equipment installed in the housing, such as batteries, must be
removed to gain access to the mats.
Heater mat
replacement
procedure
To replace a heater mat:
WARNING
Isolate the auxiliary equipment housing from the main
cabinet by switching off the EXT BATT circuit breaker on
the dc circuit breaker panel in the main cabinet before
commencing work.
1. Open the cabinet door, then open the lid and switch off the circuit breakers
on the power distribution box.
2. Disconnect the fan cable, the front panel earth bonding cable and remove
the front panel.
3. Remove any equipment or batteries that are installed in the cabinet.
4. Unplug the power connector at the battery tray for the heater mat that is to
be replaced.
5. Remove the mat from the battery tray.
The procedure for removing the heater mat is now complete.
Replacement is a reversal of the removal procedure.