R.V.R. Elettronica HC3, Manual

Page: 24 / 64

HC3 - Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo) Pag. 24
CHAPTER 4
MAINTENANCE PROCEDURES
4.1 INTRODUCTION
This chapter provides general maintenance procedures of the HC3
Combiner.
4.2 SAFETY CONSIDERATIONS
WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!
When the transmitter is working, removing the top panel will expose lethal
voltages on the line voltage selector.
Ensure that the unit is disconnected from all sources of power before carrying
out any inspection or maintenance work.
MAINTENANCE LEVEL 1
4.3 ROUTINE MAINTENANCE
The only routine maintenance required by the combiner is the periodic
replacement of the cooling fan and the removal of accumulated dust.
The period between such action will depend on ambient operating conditions
such as temperature, air-borne dust levels and humidity.
It is advisable to check the unit every 6 months and to replace noisy or worn
fans.
Fans should be replaced as a metter of course after no more than 18 months
of operation.
MAINTENANCE LEVEL 2
CARD REPLACEMENT
WARNING: TO RE-INSTALL THE CARDS IS ENOUGH TO EXECUTE OPERATIONS SEQUENCE IN
THE OPPOSITE WAY.
4.4 ALARMS CARD REPLACEMENT
1) Open the top and bottom covers of the unit.
2) Remove the Telemetry and Remote cards mounted on the Alarms card
(see as reference the paragraphs of this chapter relative to these
cards).
3) Remove the screws securing the board on the front panel.