SMA Solar Technology AG 9 Troubleshooting
Operating Manual SI60H-80H-BE-en-20 53
F 365 VAcExtPhsFail 3 The line conductors of the
measured AC voltage at
terminals VExt and AC2 do
not match.
• Ensure that the neutral conductor and line
conductor are correctly connected to the
terminal ExtVtg.
• Ensure that the neutral conductor and line
conductor are correctly connected to
terminal AC2.
• Ensure that the terminals ExtVtg and
AC2 are connected to the same line
conductor.
F 366 HotAcBus 3 When the tie switch is open,
AC voltage from an
unknown source is present at
terminal AC2.
• Ensure that the triggering of the tie switch
is correct.
• Ensure that the tie switch is correctly
wired.
F 367 ExtCtcNotOpen 3 Tie switch does not open.
• Ensure that the triggering of the tie switch
is correct.
• Ensure that the tie switch is correctly
wired.
• Ensure that the feedback contact is
correctly connected.
F 368 NRelNotOpen 3 Neutral conductor relay of
the master does not open.
• Contact the SMA Service Line.
W 369 NRelNotOpenSlv1 1 Neutral conductor relay of
slave 1 does not open.
W 370 NRelNotOpenSlv2 1 Neutral conductor relay of
slave 2 does not open.
W 372 VtgFrqRatio 1 Disconnection from the utility
grid or generator due to
noncompliance with the
voltage-frequency ratio at
the master.
• Contact the SMA Service Line if required.
W 373 VtgFrqRatioSlv1 1 Disconnection from the utility
grid or generator due to
noncompliance with the
voltage-frequency ratio at
slave 1.
W 374 VtgFrqRatioSlv2 1 Disconnection from the utility
grid or generator due to
noncompliance with the
voltage-frequency ratio at
slave 2.
No. Name Level Cause Corrective measures
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