174 Maintenance instructions
Manual Energy Storage Inverter ESI-S
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Ensure that the DC capacitors have completely discharged before going to step
4.
10.3.4Step 4: Inspect and clean the inverter
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Inspect the inverter visually for any condition that could indicate an abnormal
inverter stress (e.g. abnormal appearance/colour of components and wires)
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Remove all dust deposits in and around the unit. Pay special attention to the fan
and the heatsink. Indeed, the heatsink picks up dust from the cooling air and the
ESI might run into overtemperature faults if the heatsink is not cleaned regularly.
Pay special attention to this item if the inverter has experienced shut downs due
to over temperature in the past.
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Ensure that no loose particles are left in the unit that could cause consequential
damage.
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Ensure that the control card is free of dust. If necessary remove dust from it with
a soft brush.
10.3.5 Step 5: Check the condition of the unit contactors and fuses
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Ensure that the AC and DC contactor can move freely.
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If bad fuses are found (upstream or in the unit), replace them. If the fuse in one
phase is bad, it is good practice to change the fuses of all phases. More
information on the fuses to use is given in
Chapter 12
10.3.6 Step 6: Check the tightness of the electrical and mechanical connections
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Ensure that all electrical connections are properly fixed and that connectors are
properly plugged in. Remove oxidation traces of pin connectors if present. To this
effect a small stiff brush can be used.
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Check the mechanical fixation of all components and retighten if necessary.
10.3.7 Step 7: Correct any abnormal conditions found
If required, refer to
for advice on troubleshooting the unit.
10.3.8 Step 8: Restart the system
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Reclose the auxiliary circuit fuse box.
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Refit the inverter protective cover and reconnect the ESI-Manager if necessary.
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Reapply power to the system upstream. Verify that the ESI-Manager is booting.
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Restart the inverter, verify that the fan starts running. If major servicing work has
been done it is recommended to follow the commissioning instructions (cf.
) for restarting the inverter.
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Verify the inverter performance.
