74
Freedom SW Owner’s Guide
Troubleshooting
F64
AC overload
Escalating Auto Fault.
Must occur 3 times in 60
seconds before becoming a
manual fault.
Persistent excessive
inverter current above rated
current.
Avoid loads with long surge current.
F68
Transformer Over
Temperature
Automatic Same
as
F57
.
Same as
F57
.
F69
External Sync Failed
Automatic
When Series stacking— the
Stacking cable is not
installed.
Install the Stacking cable to connect the
two inverter/chargers.
F70
Unique Dev# Needed
Automatic
When stacking (Series or
Parallel)—if two units have
the same Device Number.
Change the Device Number of one unit.
See “Setting the Device Number” on page
56.
F71
Too Many Masters
Automatic
When stacking (Series or
Parallel)—if two units are
configured as Master units.
Change one unit to a Slave unit. See Stack
Mode under “Stacking Configuration
Menu” on page 54 in Table 17.
F73
Transformer Temp
unreadable
Automatic Temperature
sensor
is
damaged.
Service required.
F74
Other Unit Invert
Fault
Automatic
When stacking (Series or
Parallel)—if one of the
units encounters a fault that
needs to be resolved.
Clear the primary fault on the unit that
caused this fault.
Table 4
Fault Messages
Fault
Number
Message
Fault Type
Cause
Solution
Freedom SW 3K2K InvChg Owners Guide.book Page 74 Wednesday, October 9, 2013 1:34 PM