User Manual V1.3-2021-12-15 04 OTHER
26
The error messages below will be displayed on PV Master App or reported by e-mail if an error
occurs.
ERROR
MESSAGE
EXPLANATION REASON SOLUTIONS
Utility Phase
Failure
The sequence of
the on-grid wire is
incorrect
The inverter has
detected that
the phase angles
of L2 and L3 are
reversed
The L2 and L3 cables are connected
in reverse order.
Utility Loss Public grid power
is not available
(power lost or on-
grid connection
fails)
Inverter does
not detect the
connection of grid
1. Check (use multi-meter) if AC side
has voltage . Make sure grid power is
available.
2. Make sure AC cables are
connected tightly and well.
3. If all is well, please try to turn o
AC breaker and turn on again in 5
mins.
VAC Failure Grid voltage is not
within permissible
range
Inverter detects
that AC voltage
is beyond the
normal range
required by the
safety country
1. Make sure safety country of the
inverter is set right.
2. Check (use multi-meter) if the AC
voltage (Between L & N) is within a
normal range (also on AC breaker
side)
a. If the AC voltage is high, then
make sure the AC cable complies
with that required on user manual
and the AC cable is not too long.
b. If the voltage is low, make sure
the AC cable is connected well and
the jacket of the AC cable is not
compressed into the AC terminal.
3. Make sure the grid voltage of your
area is stable and within normal
range.
FAC Failure Grid frequency
is not within
permissible range
Inverter detects
that the grid
frequency is
beyond the
normal range
required by the
safety country
1. Make sure the safety country of
the inverter is set right.
2. If safety country is right, then
please check on the inverter display
if AC frequency (Fac) is within a
normal range.
3. If FAC failure only appears a
few times and is resolved soon, it
should be caused by occasional grid
frequency unstability.
04 Other
4.1 Error Messages.
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