Troubleshooting
975-0125-02-01 4–11
F7 Too many AC loads.
Turn some off, clear
fault, try again.
Escalating
Auto Fault.
Must occur
3 times in
30 seconds
before
becoming
a manual
fault.
AC Overload (PEAK
CURRENT) Shutdown
(AC OUTPUT)
Clear the fault and attempt
restart. Reduce AC loads.
F8 has lost input neutral
connection. See
guide.
Manual Neutral loss shutdown Clear the fault and attempt
restart. Check AC input wiring
for presence of a proper neutral
connection and ground
connection. Check the AC
input source to make sure the
neutral is bonded to ground.
F9 Ba ttery voltage is too
high. See guide. Automatic DC Over Voltage
Shutdown Clear the fault and attempt
restart. Ensure battery voltage
is 10–16 VDC at MS2000
terminals. Check all o th e r
charging source outputs,
battery cables.
F10 Battery is too low,
can’t invert.
Recharge battery.
Automatic DC Under Voltage
Shutdown (Immediate)
occurs if DC voltage is
below 8 volts DC
Clear the fault and attempt
restart. Recharge ba tteries.
Check battery cable
connections.
F11 Battery is too low,
can’t invert.
Recharge battery.
Automatic DC Under Voltage
Shutdown occu r s if
DC voltage is below
10 volts DC.
Clear the fault and attempt
restart. Recharge ba tteries.
Check battery cable
connections.
F12 Input AC too high.
Check source, cl ear
fault, try again.
Automatic AC Over Voltage
Shutdown (AC Line 1
input)
Clear the fault and attempt
restart. Check AC input
voltage. Check and adjust AC
input high voltage settings.
F13 Input AC too low.
Check source, cl ear
fault, try again.
Automatic AC Under Voltage
Shutdown (AC Line 1
input)
Clear the fault and attempt
restart. Check AC input
voltage. Check and adjust AC
input low voltage setting.
F14 Input AC too high.
Check source, cl ear
fault, try again.
Automatic AC Over Voltage
Shutdown (AC Line 2
input)
Not applicable for MS2000
Table 4-4
Fault M essa g es