5
2.4
AC Output/AC Input Connections
A terminal strip is provided for the AC output/load, as well as for the AC input line (utility). Before beginning any
work inside the inverter, ensure that all incoming AC/DC power is de-energized and/or isolated. Verify that no
voltage is present inside the inverter by using a voltmeter at all input and output terminals.
Select wire size using the Table 2 on the previous page. Use the table below to determine the breaker size used
in the FT inverter being installed. Refer to Figures 4 and 5 for connector locations.
For the AC output, connect the AC load phase (hot) to the OUTPUT (L) terminal and the AC load neutral to the
OUTPUT (N) terminal. For the AC input, connect the AC input phase (hot) to the INPUT (L) terminal and the AC
input neutral to the INPUT (N) terminal. Connect an adequate earth ground lead (use table on previous page for
sizing) to the corresponding grounding terminal. The AC terminals accept 14
–
6 AWG wire.
NOTE:
Feeder breakers should be sized to match the size of the protection used in inverter. See the table below
for the inverter AC breaker sizes.
FT
Model
AC Input/Output Voltage
120VAC 208VAC 220VAC 240VAC
1K
11A
6A
6A
6A
2K
21A
12A
12A
11A
3K
32A
18A
17A
16A
4K
42A
24A
23A
21A
5K
52A
30A
29A
26A
6K
63A
36A
34A
32A
8K
84A
48A
46A
42A
Table 3
–
Resettable AC Breaker Sizes
2.5
Alarms
The FT series inverter has an audible buzzer alarm which activates depending on the status of the inverter. Below
are the available alarms/status indicators:
•
Load Powered by Battery:
Beeps 4 times every 15 seconds
•
High Battery Voltage:
Beeps 4 times per second
•
Low Battery Voltage:
Beeps 2 times per second
•
Overtemperature:
Beeps 2 quick times per second
2.5.1
Alarm/Status Indicator Descriptions
LOAD POWERED BY BATTERY ALARM
will trigger and the inverter will beep 4 times every 15 seconds if the
AC load is being powered by the battery. This may be an indication that the AC mains may not be available as a
supply or the AC mains may not be within range to be considered an AC supply. The alarm will clear once the
inverter shifts its source to the AC mains.
LOW BATTERY VOLTAGE ALARM
will trigger and the inverter will beep 2 times per second if the DC voltage
falls below 1.67 volts per cell for longer than 5 seconds. The alarm will clear once the low battery voltage condition
is no longer present.
HIGH BATTERY VOLTAGE ALARM
will trigger and the inverter will beep 4 times per second if the DC voltage
rises above 2.5 volts per cell for longer than 5 seconds. The alarm will clear once the high battery voltage condition
is no longer present.
OVERTEMPERATURE ALARM
will trigger and the inverter will beep 2 quick times per second if the internal
temperature of the inverter rises above 40
º
C/104
º
F for longer than 5 seconds. The alarm will clear once the
overtemperature alarm condition is no longer present.
