Theory of Operation
IQ SERIES OWNERS MANUAL - 27 -
Inverter LED will blink.
Battery charge stage LEDs will illuminate as described above.
The AC output test light should be on, indicating the presence of shore power and correct
operation of the AC Transfer switch.
13. FOR IQC MODELS - Disconnect the AC shore power input. The AC output test light blinks momentarily,
indicating the operation of the Transfer switch connection to connect the AC loads to the inverter output.
14. The Inverter LED on the inverter control panel has a solid green light indicating correct inverter operation.
At this point, apply AC loads up to the models rated capacity to verify full-power operation.
15. Disconnect all AC loads. The Inverter LED blinks, indicating that the inverter has returned to Load
Demand mode.
16. FOR IQC MODELS - Determine the correct charger output amps and place the Programming Switch
(#18) positions to match this value. Multiple switches can be activated at the same time to combine
values.
For 12-Volt models, the output amps corresponding to the switch positions are:
A 8 Amps
B 16 Amps
C 32 Amps
D 64 Amps
For 24-Volt models, the output amps corresponding to the switch positions are:
A 4 Amps
B 8 Amps
C 16 Amps
D 32 Amps
Determine the combined value of switches that match the desired charger output amps and place these
switches to the ON position. For example for a charger output of approximately 80 Amps, the 64-Amps
and 16-Amp switch positions would be ON and the 8-Amp and 32-Amp switch positions would be OFF.
If the Load Demand function is not appropriate for the intended application, reset the Load Demand
Switch, Programming Switch 2, to the OFF position. This will allow the inverter to be fully On
continuously unless switched off with the On/Off front panel switch or remote control.
Replace front cover of the inverter.
4.2 Procedure to Check Battery Charger Operation
Due to the amount of time to perform this procedure, verifying the battery charger function, it may be
postponed to a convenient time.
To test the battery charger operations, first discharge the battery by placing a large AC load (approx. 50%
of the unit’s rated capacity) on the system and operating the inverter with shore power off. The AC load
will discharge the battery over a time relative to the amount battery capacity, size of load, and ambient
temperature.
When the battery charge level is low, the Battery Low LED turns on and will stay on until the battery
voltage has dropped to the Battery Low shutdown stage the inverter shuts off and the LED begins to
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