Chapter 9: Maintenance - Delta Modulon DPH Series User Manual

Chapter 9: Maintenance

UPS
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1. UPS Cleaning:
Regularly clean the UPS, especially the slits, openings and filters, to ensure that
the air freely flows into the UPS to avoid overheating. If necessary, use an air
blower to clean the slits and openings and replace the filters regularly to prevent
any object from blocking or covering these areas.
2. UPS Regular Inspection:
a. Monthly check the filters and regularly replace them.
b. Biannually check the UPS and inspect:
1) Whether the UPS, LED indicators and alarm function normally.
2) Whether the UPS works in Bypass mode (normally, the UPS works in On-
Line mode). If yes, check if any error, overload, internal fault, etc. occur.
3) Whether the battery voltage is normal. If the battery voltage is too high or
too low, find the root cause.
Batteries
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The DPH series UPS uses the lead-acid batteries or lithium-ion batteries. Make sure
to replace batteries according to the battery life. The actual battery life depends on
the environment temperature, usage, and charging/ discharging frequency. High
temperature environments and high charging/ discharging frequency will quickly
shorten the battery life; thus, battery inspection and maintenance are required
periodically. Please follow the suggestions below to ensure normal battery life.
1. Keep usage temperature between 15°C ~ 25°C (59°F ~ 77°F).
2. When the UPS needs to be stored for an extended period of time, the lead-acid
batteries must be recharged once every three months and the charging time must
not be less than 24 hours each time. As for the lithium-ion batteries, please contact
your battery supplier for the charging frequency and charging duration.
Fans
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Higher temperature will shorten fan life. When the UPS is running, please check if all
fans work normally and make sure if air can move freely around and through the UPS.
If not, please replace abnormal fans.
NOTE:
Please ask your local dealer or customer service for more maintenance infor-
mation. Do not perform maintenance if you are not trained for it.
Delta UPS DPH 50-200kVA
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