Troubleshooting - Epever ET4415BND User Manual

 Damaged Remote Temperature Sensor
If the temperature sensor is short-circuited or damaged, the controller will be
charging or discharging at the default temperature 25℃ to prevent the battery
damaged from overcharging or over discharged.
 Controller Overheating
If the temperature of the controller heat sinks exceeds 85℃, the controller will
automatically start the overheating protection and recover below 75℃.
 High Voltage Transients
PV is protected against small high voltage surge. In lightning prone areas,
additional external suppression is recommended.
CAUTION: Faults will be cleared every day, so the faults which
aren't caused by hardware can be solved intelligently.

5.2 Troubleshooting

Faults
Charging LED
indicator off during
daytime when
sunshine falls on
solar modules
properly
Battery LED indicator
green fast blink and
LCD displaying ‗OVD'
Fault LED indicator
blink, LCD displaying
‗Over Volt'
Fault LED indicator
blink, LCD displaying
‗Over Temp'
Cannot connect to
the controller via
RS-485 or RS-232
Possible reasons
PV array
disconnection
Battery voltage is
larger than over
voltage disconnect
voltage (OVD)
Solar modular output
is too high
Heat sinks
operational
temperature is quite
high to 85 º C or above
RS-485 serial baud
rate setting error or
serial-USB adapter
incorrect configuration
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Troubleshooting
Confirm that PV and battery
wire connections are correct
and tight
Check if battery voltage too
high, and disconnect solar
modules.
Check solar component
parameters matching; the
controller will disconnect the
input if the voltage is over
150V and will Recovery
below 145V
The controller will
automatically stop working.
When the temperature is
below 75 º C, the controller
will resume to work
Check serial baud rate is set
to 115200bps or not and
choose the right COM port; If
using a serial-USB adapter,