User guide

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be equalized. Consult your battery manufacturer or read the battery manual when you try to
equalize your batteries. Disconnect any DC load connected to the battery, as during
equalization mode, the charger will produce 16V to the batteries. You must monitor the
battery specific gravity throughout the equalization to determine the end of the equalization
cycle.
When EQ mode is set to ON, the unit will charge batteries in one full cycle before it starts to
equalize the battery. Check the battery electrolyte level. If necessary, refill with distilled water
only. All cells should have similar electrolyte levels. If distilled water is added, batteries must
undergo a complete charge cycle. The charger cannot determine when to terminate the
equalization of the battery. A 1 hour time-out is intended as a safety feature to terminate the
equalizing process. You can re-activate the EQ mode by setting it ON again as necessary
after checking batteries manually.
Optional Battery Temperature Sensor Feature:
Optional Battery Temperature Sensor Nature Power Part Number #BTS-10K is highly
recommended to be used with the charger to protect your battery and provide better charging
voltage accuracy. The battery temperature sensor senses the battery temperature and makes
adjustments to the charging voltage.
Battery
Temperature
Battery Charging Voltage Adjustment from 25 °C normal setting
Flooded and GEL type
AGM type
< 25 °C
+ 0.027 V /°C
+ 0.021 V /°C
25 °C
0 V
0 V
> 25 °C
- 0.027 V /°C
- 0.021 V /°C
Note: The charger will terminate battery charging when the BTS senses the battery
temperature reaching 60 °C. It will not continuously make voltage adjustments when the
battery temperature drops to below 0 °C.
Understanding the Error Codes
Error Code on
Display
Condition
Corrective Action
Fault: E01
Low Battery
Battery voltage is too low
and unit has shutdown
Recharge battery immediately and
restart unit.
Fault: E02
High Battery
Battery voltage is too high
and unit has shutdown
Check battery voltage or determine if
any external charger with high voltage
output is connected to the battery bank
Fault: E03
Temp Protect
Internal temperature is too
high and unit has shutdown
Check if any object has blocked the air
flow of the unit. Check environmental
temperature. The unit will restart when
the internal temperature has reduced
to about 50 °C.
Fault: E04
AC Over Load
Inverter AC Output has
overload
Check AC load connected and restart
the unit.
Fault: E05
Short Protect
Inverter output is short
circuited and has shutdown
Check load connected to the AC
output and restart the unit.
Fault: E06
INV Over Load
Inverter output voltage is too
high or too low and has
shutdown
Check unit and load and restart the
unit.
Fault: E08
BTS Protect
Battery temperature is high
and warning occurs. Unit will
shutdown shortly.
Check battery. Check ventilation in
battery compartment. Check
environmental temperature.