Xantrex XW4024-120 Operation Manual page 86

Troubleshooting
Table 4-5 Fault Messages
Fault
Number Message
F16 AC2 Input L1
Under Frequency
F17 Relay(s) Welded
F18 Relay(s) Welded
F19 Relay(s) Welded
F20 Relay(s) Welded
F21 Relay(s) Welded
F22 Relay(s) Welded
F23 AI Over Frequency
4–20
Fault Type Cause
Automatic AC2 under-frequency
shutdown (AC Line 1
input) at the AC2 Lo
Freq setting.
Manual The AC1 L1 transfer
relay is bad or an AC
source was wired
directly to the AC
output.
Manual AC1 L2 transfer relay is
bad or an AC source was
wired directly to the AC
output.
Manual AC2 L1 transfer relay is
bad or an AC source was
wired directly to the AC
output.
Manual AC2 L2 transfer relay is
bad or an AC source was
wired directly to the AC
output.
Manual An unidentified transfer
relay is bad or an AC
source was wired
directly to the AC
output.
Manual An unidentified L1
transfer relay is bad or an
AC source was wired
directly to the AC
output.
Automatic Over-frequency anti-
islanding, caught by the
AC qualification limit.
Solution
Fault clears when frequency rises
above the AC2 Lo Freq setting.
Check AC input frequency. Check
and adjust AC input low frequency
setting.
Disconnect the inverter's output
wiring. If error continues, have unit
serviced.
See F17.
See F17.
See F17.
See F17.
See F17.
No action required. The inverter
stops selling and disconnects from
the grid. When the fault clears, a
five-minute timer begins counting
down. The inverter does not sell
again until grid voltage and
frequency are within range for five
minutes.
975-0240-01-01