by referring to the product
maintenance manual.
4. After checking that the battery power
cable is correctly connected, turn on
the switch on the battery side and then
the switch on the bus side, and issue a
startup command.
5. If the alarm persists, contact your
dealer or technical support.
1. Locate the input and output circuit
breakers associated with [ESC-No].
2. Issue a hibernation command to the
ESR corresponding to the ESC, and turn
off the switch on the battery side and the
switch on the bus side in sequence, and
wait for 5 minutes.
3. Check the ground impedance of the
battery output (measured on both the
battery side and the bus side). If a short
circuit occurs or the insulation is
insufficient, rectify the fault.
4. Check whether the PE cable of the
system is correctly connected.
5. If the impedance is lower than the
specified protection threshold in rainy and
cloudy days, set Insulation resistance
protection threshold using the mobile app,
SmartLogger, or NMS.
6. After checking that the battery power
cable is correctly connected, turn on the
switch on the battery side and the switch
on the bus side in sequence, and issue a
running command.
7. If the alarm persists, contact your
dealer or technical support.
1. Check the ventilation of [ESC-No]
and whether the ambient temperature
of the optimizer exceeds the upper
threshold.
2. If the ventilation is poor or the
ambient temperature exceeds the
upper threshold, improve the
ventilation and heat dissipation.
3. Check whether the internal or external
fan of the rack controller is faulty.
4. If the ventilation and ambient
temperature meet requirements,
contact your dealer or technical
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