Product Manual

Specifications
900-0169-01-00 Rev B 69
Summary of Operating Limits
Severe conditions cause the inverter to limit its output or shut down for protection. The most
common conditions are high voltage, low voltage, and temperature. The limits for these conditions
are summarized in Table 19. See pages 58 and 60 for more information on these conditions and the
warning or error messages which accompany them.
Table 19 Operating Limits for all FXR Models
Voltage Limits 12-Volt Model 24-Volt Model 48-Volt Model
Limit Adjustable Off On Off On Off On
High Battery No >17 Vdc <17 Vdc >34 Vdc <34 Vdc >68 Vdc <68 Vdc
Low Battery (default) Yes >10.5 Vdc <12.5 Vdc >21.0 Vdc <25.0 Vdc >42.0 Vdc <50.0 Vdc
Temperature Limits
Limit
Transformer Output FETs Capacitors
Over Temperature
error
<125°C >125°C <95°C >95°C <95°C >95°C
Reduced charging or selling >120°C >90°C >90°C
Internal Fan
<50°C >60°C <50°C >60°C <50°C >60°C
Limiting Charge Current (Multiple Inverters)
It is not advisable to set
Charger AC Limit
less than 6 Aac in a stacked system. The Power Save
function requires the master to activates the slave chargers in sequence only when the charge current
exceeds 5 Aac. If the setting is less than 6, Power Save will not activate any other chargers. For more
information on this function, see the Power Save section beginning on page 42.
When the
Charger AC Limit
setting is 6 Aac or more, other active chargers add the same amount to the
total. The total current equals the
Charger AC Limit
setting times the number of active chargers. In
some systems, lower currents may be required due to battery bank size or other reasons. To achieve
lower currents, chargers can be individually set to
Off
so that the master inverter does not activate them.
(The global
Charger Control On
only enables inverters not individually set to
Off
.) Combining the
charger limit settings with a reduced number of chargers allows better control over the current.
In Table 20,
Max Charge Adc
shows examples of DC charging values which may be recommended for
a battery bank.
Aac
converts these values into AC amperes.
On
provides recommendations for the smallest number of chargers in operation.
Set
recommends
the inverter
Charger AC Limit
setting. Note that this table specifies the number of chargers to leave
on
. All other chargers should be turned off using the
Charger Control
menu item. (See the menu
tables beginning on page 72 to locate this command in the menu structure.)
The lowest Adc figures in this table allow for a single inverter to perform all charging. All other
inverters would be turned off. The highest Adc figures are for the maximum of ten stacked chargers.
The recommended settings ensure the charging will not exceed a designated current. The amount is
likely to be less.