Project:
LV Energy Storage Inverters ESI
Issued by:
Servicing report
Date:
Page 2 of 4
200 Maintenance instructions
Manual Energy Storage Inverter ESI-S
10.7.2 Standard maintenance procedure
Ambient conditions and derating condition (inverter running)
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Check the ambient temperature (< 40°C/104°F) (if > 40°C/104°F, derating is required)
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Check the installation altitude (< 1000m/3300ft) (if > 1000m/3300ft, derating is
required)
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Check the ventilation (room and enclosure)
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Ensure that no conductive dust is present in and around the inverter enclosure
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Rating factor (temperature > 40°C/104°F or altitude > 1000m/3300ft)
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Rating (%)
Inverter operating status record (inverter running)
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Inverter load graphs
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Vdc load (%)
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Ipeak load (%)
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Irms load (%)
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Temp (%)
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Inverter running in derated mode due to temperature limitation?
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Temp-load around 100% and other load indicators low? (Y/N)
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‘T-Limit’ indicator on digital output monitor on? (digital output 6 by default) (Y/N)
If answer if ‘Y’ to any of the two questions above, check inverter cooling.
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ESI operation hours
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Fan operation hours
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If fan operation hours are multiple of 40000 hrs for units up to 60A and of 35000 hrs /
27000 hrs for units with higher ratings, exchange fan.
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Event logging window
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Abnormal events present? (Y/N)
If ‘Y’, describe them in the ‘comments’ section of this report.
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Total number of faults recorded by the system
Describe them in the ‘comments’ section of this report.
Shut down the inverter, remove supply to the unit
Wait for 25 minutes for DC capacitors to discharge
Remove the inverter protective cover (right hand side) and open the auxiliary fuse box
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Ensure that components do not carry dangerous voltage levels anymore.
Inspect and clean the inverter
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All components/cabling looks OK? (Y/N)
IF ‘N’, describe the problems in the ‘comments’ section of this report.
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Remove all dust deposits in and around the inverter (fans, heatsinks, control board, …)
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Remove loose components if present in enclosure