~ 60 ~
GRID Over FREQ 1
Grid failure
2. If the grid voltage or frequency is within the
allowable range, please contact the distributor or
after-sales service center.
GRID Over FREQ 2
GRID Low FREQ 1
GRID Low FREQ 2
Failure in rapid grid
inspection
Failure in inverter
soft-starting due to
sudden change of
external condition
1. Wait until the inverter recovers.
2. Check the grid voltage or frequency. If the grid
voltage or frequency exceeds the allowable
range of the inverter protection parameters, start
the inverter again after the power grid becomes
normal.
3. If the grid voltage or frequency is within the
allowable range, please contact the distributor or
after-sales service center.
Islanding fault
After grid AC failure,
the inverter detects
the islanding by
active mode.
1. Check whether the AC circuit breaker of the grid
trips and the connection wires are firmly
connected;
2. Check whether the grid is available;
3. If all conditions are correct and the failure
persists, please contact the distributor or after-
sales service center.
Zero ground voltage
fault
1. PE terminal on AC
terminal block and
secondary
protection ground
terminal on inverter
bottom are not
reliably connected.
2. High voltage to
earth of L and N
wires of inverter
1. Check whether the inverter has a reliable ground
cable.
2. If there is an access wire and the failure
persists, please contact the distributor or after-
sales service center.
OUT RMS Over VOLT
Protection resulting
from abnormal
instance output of
inverter after sudden
change or short
current on grid
1. Check whether the external load and the grid
exceed the range specified in the inverter
specifications. After failure recovery, the inverter
automatically recovers to normal operation.
2. If the alarm is repeated, please contact the
distributor or after-sales service center.
OUT RMS Low VOLT
OUT RMS Over CURR
OUT Over FREQ
OUT Low FREQ
INV FAST Over CURR
INV RMS Over VOLT
INV RMS Low VOLT
