ABB ESI-S, Installation, Operation And Maintenance Instructions

Page: 191 / 200

Manual Energy Storage Inverter ESI-S  Troubleshooting guide 191
Fault message Cause What to do
Overvoltage RMS The RMS value of the
supply voltage measured
with the AC voltage
measurement board is
higher than the
acceptable maximum
value.
− Measure the three line voltages and
check if they are within limits.
− Measure the line voltages (e.g.
voltmeter) and compare them with
the line voltages given by the inverter
(ESI-Manager or PQF-Link).
− Ensure that the AC voltage is properly
measured.
Preload problem The DC capacitors could
not be preloaded at
startup. The voltage
increase on the DC
capacitors during the
preload phase is not high
enough.
− Measure the three line voltages and
check if they are within limits.
− Verify the fuses (PF1 and PF2) and the
resistors (R1 and R2) of the preload
circuit (A001).
− Inspect the DC-bus for traces of
damage that may have caused a short
circuit on the DC side of the IGBT
module or on the DC voltage
measurement board.
Unbalanced supply The supply network
imbalance is out of range.
− Measure the three line voltages and
check if they are within limits
including the imbalance limit.
− Measure the line voltages (e.g.
voltmeter) and compare them with
the line voltages given by the inverter
(ESI-Manager or PQF-Link).
− Ensure that the AC voltage is properly
measured. Do the checks discussed
for the ‘Loss of phase’ fault.
− Check the earth of the unit.
Undervoltage RMS The RMS value of the
supply voltage measured
with the AC voltage
measurement board is
lower than the acceptable
maximum value.
− Measure the three line voltages and
check if they are within limits.
− Measure the line voltages (e.g.
voltmeter) and compare them with
the line voltages given by the inverter
(ESI-Manager or PQF-Link).
− Ensure that the AC voltage is properly
measured. Do the checks discussed
for the ‘Loss of phase’ fault.
Unstable mains frequ. The network frequency is
varying too fast.
− Measure the network frequency and
its variation, and check if they are
within limits.
− Check the phase rotation (only in case
of modification at the installation).
− Ensure that the AC voltage is properly
measured. Do the checks discussed
for the ‘Loss of phase’ fault.