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Troubleshooting
4–22
975-0240-01-01
F38
AI L2 Under
Voltage
Automatic
See F37.
See F23.
F39
AI L1L2 Under
Voltage
Automatic
Under-voltage anti-
islanding fault, caught by
the qualification limit,
voltage difference
between L1 and L2.
See F23.
F40
AI L1L2 Under
Voltage
Automatic
Under-voltage anti-
islanding, fast
disconnect, 132 V.
See F23.
F41
APS Under Voltage
Escalating
Auto Fault.
Must occur 3
times in 30
seconds before
becoming a
manual fault.
Auxiliary power supply
under-voltage shutdown
Clear the fault and attempt restart. If
problem persists, call customer
service.
F42
APS Over Voltage
Escalating
Auto Fault.
Must occur 3
times in 30
seconds before
becoming a
manual fault.
Auxiliary power supply
over-voltage shutdown
Clear the fault and attempt restart. If
problem persists, call customer
service.
F44
Battery Over
Temperature
Automatic
Battery over-
temperature shutdown at
60 °C.
Clear the fault and attempt restart.
Stop charging, check battery voltage
and temperature. Check for
excessive ambient temperature and
adequate ventilation in the battery
compartment.
F45
Capacitor Over
Temperature
Automatic
Capacitor over-
temperature shutdown at
150 °C.
Clear the fault and attempt restart.
Ensure adequate ventilation around
the XW Inverter/Charger. Reduce
AC loads.
F46
Controller fault
Manual
Controller fault
Service required.
Table 4-5
Fault Messages
Fault
Number
Message
Fault Type
Cause
Solution
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