User Manual

46
• High Voltage Transients
PV is protected against smaller high voltage surge. In lightning prone areas, additional
external suppression is recommended.
Note: The controller has daily automatic fault recovery function which will reduce
the manual operation and can intelligently eliminate the fault caused by non-actual
hardware failure.
5.2 Troubleshooting
Trouble Shooting Table 5-1
Faults
Possible reasons
Troubleshooting
Charging LED indicator is
off during daytime and the
monitor shows Disconnect.
PV array
disconnection
Check that PV and battery wire
connections are correct and tight.
monitor shows Measure
Err、MOS-I Short、MOS-C
Short、MOS Break.
MOS-I or MOS-C
are damaged.
Please restart controller;
if the fault still exists, switch off
controller immediately and contact
the supplier to make maintenance.
Loads do not work and
monitor shows LVD.
Battery is over
discharged
The controller cut off the output
automatically and recover when fully
charged.
Charging and discharging
circuit is off and monitor
shows OVD.
Battery is over
voltage
switch off the wiring of solar array
and measure the voltage of battery
whether is too high.
Charging and discharging
circuit is off and the BATT
of monitoring interface
shows Over Temp.
Operating ambient
temperature(local
temperature
sensor) or battery
temperature(remot
e temperature
sensor) over
temperature
When operating ambient temperature
or battery temperature reaches
exceeds 65ºC controller will cut off
input and output circuit automatically.
When the temperature is below 55℃,
controller will automatically
reconnect input and output circuit.