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Troubleshooting
Table 3 provides a detailed description of the detected fault messages and solutions. If you are unable to resolve the problem
after referring to this table, contact your dealer or Customer Service.
Table 3 Detected Fault Messages
Fault
Number Message Fault Type Cause Solution
F1 AC Output
under voltage
Escalating Auto Fault.
Must occur 3 times in 30
seconds before becoming
a manual fault.
Inverter voltage is
under 100 volts.
Remove excessive load.
F2 AC Output over
voltage
Escalating Auto Fault.
Must occur 3 times in 30
seconds before becoming
a manual fault.
Inverter voltage is
over 135 volts.
Check if there is an external power
source that is running parallel to the
inverter’s output.
F17 Relays Welded Manual AC backfeed from
welded relay.
Service required.
F18
FSW Owners Guide.book Page 91 Tuesday, August 7, 2018 9:03 AM
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