Alpha Technologies CXPS 48-1.8-M2, 48V Pos Gnd - Manual (Page 40)

Argus Technologies Ltd. 053-991-C0 Rev A WC
Printed in Canada. © 2008 Argus Technologies Ltd. ARGUS and CORDEX are trademarks of Argus Technologies Ltd. All Rights Reserved. Page 26 of 28
8 Maintenance
Although very little maintenance is required with Argus systems, routine checks and adjustments are
recommended to ensure optimum system performance. Qualified service personnel should do repairs.
The following table lists a few maintenance procedures for this system. These procedures should be performed at
least once a year.
WARNING: HIGH VOLTAGE AND SHOCK HAZARD.
Use extreme care when working inside the shelf while the system is energized.
Do not make contact with live components or parts.
Circuit cards, including RAM chips, can be damaged by static electricity. Always wear a grounded
wrist strap when handling or installing circuit cards.
Ensure redundant modules or batteries are used to eliminate the threat of service interruptions
while performing maintenance on the system’s alarms and control settings.
Procedure Date Completed
Clean ventilation openings
Inspect all system connections (re-torque as necessary)
Verify alarm/control settings
Verify alarm relay operation
Table G–Sample maintenance log
To order more breakers refer to the options listed in the Specifications Section at the front of this manual. Always
replace circuit breakers with the same type and rating.
Consult factory for all replacement parts.
8.1 Fan Replacement
1. Shut off the unit and unlatch (rotate 1/4-turn) the front fastener that secures the power module to the shelf.
2. Slide the module 10 cm (4”) out of the shelf and wait two minutes for module capacitors to discharge.
3. Remove the screws (each side) that secure the front panel to the module chassis.
4. Slide the front panel out.
5. Disconnect the fan power lead wires and front panel ribbon cable from the module.
6. Remove the screws that secure the fan to the front panel.
7. Note the direction of airflow and remove the fan from the front panel.
8. Install the replacement fan following the preceding steps in reverse order.
8.2 MOV Replacement
The MOVs (metal oxide varistor) are used to protect the power modules from power line surges and the surges
caused by lightning strikes. High capacity surges may permanently damage MOVs but they are easily replaced in
the field using the following procedure:
1. Shut off the unit and unlatch (rotate 1/4-turn) the front fastener that secures the power module to the shelf.
2. Slide the module 10 cm (4”) out of the shelf and wait two minutes for module capacitors to discharge.
3. Turn the module around to face the back of the unit and remove the screw (module bottom toward the rear)
securing the MOV cover.
4. Remove the cover and locate the MOV printed circuit board (PCB).
5. Remove the screws that secure the MOV PCB.
6. Decontaminate the area and unit with flux remover or a similar cleaning compound. This is to remove any
metallic particles or carbon, which may have been deposited when the MOV failed.
7. Install the replacement MOV PCB following the preceding steps in reverse order.