Liebert 1500 - Manual (Page 43)

Maintenance 37
5.0 M AINTENANCE
5.1 General
The following is a list of general preventive maintenance procedures which should be performed
periodically as required according to the environmental conditions and customer maintenance
policy to ensure trouble free operation of the Helios DC System 4000/48:
• clean all ventilation openings
• if these are used, clean or replace the air filters on the rectifiers
• tighten all electrical connections
• check for hot fuses or breakers (loose, undersized or overloaded)
• verify alarms and alarm thresholds
• verify calibration settings
• verify rectifier settings
The voltage and alarm settings of the controller and rectifiers are based on the type of batteries
used with the power system. The recommended settings for various types of batteries can be
found in SL-60026, Voltage Level Limits for Power Plants, Rectifiers and Controllers. If unlisted
models of batteries are used, it may be necessary to follow specific customer or manufacturer
requirements.
The following is list of the tools and test equipment required to adjust the equipment in the Helios
DC System 4000/48:
• a potentiometer screwdriver, Bourns No. 60 or equivalent
• a digital voltmeter, Fluke 8050A or equivalent
• a dummy load, 5 kVA
5.1.1 Helios Monitor 3000/48
If the power system is equipped with a Helios Monitor 3000/48, refer to the user manual,
SL-60015, for maintenance and troubleshooting information.
5.1.2 Controller and Rectifiers
The controller and the rectifiers need little maintenance. The following should be checked period-
ically in order to ensure trouble free operation.
Cleaning
Clean the front panels and the LED display screens with a soft cloth and isopropyl alcohol.
Calibration
Verify the calibration of the alarm and control thresholds at least once a year. Follow the calibra-
tion instructions detailed in the appropriate user manual.
Storage
The rectifiers contain aluminum electrolytic capacitors. For this reason, they shall be either kept
in operation, or energized once a year for at least two hours in order to maintain the electrolytic
capacitors in good condition.
!
WARNING
PREVENTING DAMAGE TO THE EQUIPMENT
DO NOT ATTEMPT ANY OTHER REPAIR THAN THOSE LISTED
BELOW. IF ANY PROBLEM PERSISTS, CONTACT LIEBERT
GLOBAL SERVICES AT 1-800-LIEBERT.