XP250 INSTALLATION AND OPERATION MANUAL
Page 6
immediately restart. Since high over voltages tend to have very
fast edges, the inverter must shut down quickly to protect itself.
This kind of fault usually occurs if the battery is suddenly
disconnected from the system and the battery charger continues to
supply current. When battery voltage falls to within 2% to 4% of low
line voltage, the LOW BATT / THERM buzzer will sound. If the
condition continues without reducing load to the inverter or adding
charge to the battery, the inverter will shut off. When voltage rises to
approximately 95% of nominal battery voltage, the inverter will turn
back on and the alarm condition will clear. The inverter can be
manually reset by cycling the on/off switch. This will reset the
protection circuitry and turn the inverter on at any voltage above
minimum voltage.
The inverter is also
protected against overheating. It will provide its full rated output
up to the temperature listed in the specification sheet. If it is
subjected to higher ambient temperatures, or air circulation is
blocked, the inverter may overheat. If the LOWBATT/ THERM
buzzer sounds, immediate action is required or the inverter will shut
down. Either reduce load, or provide more cooling in the immediate
environment. If no action is taken, the inverter will likely shut down
within 2 minutes. When the inverter shuts down, the alarm condition
will persist. Since the inverter has eliminated its load, it will cool fairly
quickly. It will automatically restart when it has cooled sufficiently, and
the LOW BATT/THERM alarm will clear. If the internal temperature is
over 105C a warning buzz 5 C before shut off.
If rated output power is exceeded, output voltage is reduced to a
level that will provide the inverter's rated power to the load by
clipping tops of the waveform. The inverter can operate safely in this
mode indefinitely. The overpower protection circuit will recover
instantly when the overpower condition clears.
.
.
.
OVER TEMPERATURE PROTECTION: