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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.  

 

Summary of Contents for FT Series

Page 1: ...9 1188 Fax 847 299 3061 Revision A00 Rev Date 05 21 ECN 22891 This manual is subject to change without notice You may obtain the newest version of the manual at www lamarchemfg com La Marche Manufactu...

Page 2: ...sure that neither liquids nor any wet material come in contact with any internal components Do not operate this unit outside the input and output ratings listed on the unit nameplate Do not use this u...

Page 3: ...rter sent back for evaluation and repair CAUTION Failure to properly file a claim for shipping damages or provide a copy of the claim to La Marche may void warranty service for any physical damages re...

Page 4: ...llation 2 2 1 Mounting the FT Series Inverter 2 2 1 1 Wall Mounting the FT Series Inverter 2 2 2 FT Series Inverter Overview 3 2 3 DC Input Connections 4 2 4 AC Output AC Input Connections 5 2 5 Alarm...

Page 5: ...ries model number is coded to describe the features that are included Find the model number on the nomenclature nameplate of the enclosure Follow the chart below to determine the configuration of the...

Page 6: ...mounting the FT Series Inverter consider the size and weight of the inverter The FT Series Inverter is wall mounting system Refer to Table 1 to verify the weight of the inverter The location chosen f...

Page 7: ...iew 251 Enclosure DC Terminal DC Terminal GND Terminal DC Terminal DC Terminal GND Terminal GND Terminal AC Input N AC Input L AC Output N AC Output L GND Terminal Inverter AC Output Breaker Charger A...

Page 8: ...rminal stud size NOTE It is recommended to use a battery disconnect breaker between inverter and battery bank helpful during battery or inverter maintenance The breaker disconnect should be sized with...

Page 9: ...es 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...

Page 10: ...the output voltage Power Down Sequence To power down the FT inverter simply press the ON OFF button while the screen is on The inverter s display should turn off and the output voltage should decrease...

Page 11: ...eter AC Output Voltage Meter Equipment Operating Mode Selection Grid Priority Mode Energy Saving Mode Battery Priority Mode Operating Mode can be entered by long pressing the Function button for secon...

Page 12: ...restarting the inverter Up Charge Current Menu Long press for 5 seconds Charge Current Selection Charger Output Current LCD icon will display active Charge Current Select Using C0 C1 C2 C3 C4 C5 C6 0...

Page 13: ...battery When the battery is connected to the external charging device like solar charging system after adequate power charged inverter will automatically switch to battery mode through internal relay...

Page 14: ...0VAC 5 Inverter Mode Frequency 50 60Hz 1 Inverter Mode Output Current 230VAC Model 4 5A 9 1A 13 6A 18 2A 22 7A 27 3A 36 3A Output Current 110VAC Model 9 1A 18 2A 27 2A 36 4A 45 2A 54 6A 72 7A Output W...

Page 15: ...loop feet MaxAmp Maximum allowable amperes for given voltage drop AVD Allowable voltage drop K 11 1 for commercial TW copper wire 17 4 for aluminum Calculating Wire Size Requirements AVD K LF A CMA Ca...

Page 16: ...12 Appendix C Example Wiring Diagram Battery Connections 12VDC Series Battery Wiring 24VDC Series Battery Wiring 48VDC Series Battery Wiring AC Mains Input AC Output Connections AC Loads Mains Supply...

Page 17: ...ion adjustments and service arrangements Should minor adjustments be required the local La Marche Sales Representative should be contacted to provide this service All sales are final Only standard La...

Page 18: ...14 Appendix E Document Control and Revision History Part Number 144911 Instruction Number P25 LFT 1 Issue ECN 22891 05 21...

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