31 HHT-5000/6000/8000/10000/12000 USER MANUAL
Grid frequency
exceeds the
permissible range
grid frequency exceeds the
Safety regulations
⒈If it happens occasionally, it belongs to the short-time
abnormality of the power grid, the inverter will return to normal
operation after detecting the normal power grid, and there is no
need to deal with it.
2. In case of frequent occurrence but automatic recovery, please
confirm if the grid voltage is outside the permissible range due to
local grid conditions, try to modify the values of the monitored
operational limits after informing the electric utility company first.
⒊If it cannot be recovered for a long time, please confirm:
①whether the AC circuit breaker is disconnected
②whether the AC terminal is in good connection
③whether the power supply line is normal
④ whether the safety regulation settings are normal
DC component of
the electricity
exceeds the
permissible range
the current exceeds 1A in
stastic state and 4A in
dynamic state
Disconnect the inverter from the utility grid and the PV array, and
reconnect it after LED turns off. If this fault is still being displayed,
please contact the service.
EEPROM Error, e.g.
transition
disturbance
Micro CPU read EEPROM
failed
Disconnect the inverter from the utility grid and the PV array, and
reconnect it after LED turns off. If this fault is still being displayed,
please contact the service.
Internal
communication
fault
Master CPU communicate
with slave CPU abnormal
Disconnect the inverter from the utility grid and the PV array, and
reconnect it after LED turns off. If this fault is still being displayed,
please contact the service.
Bus-voltage is greater than
1030V
Check the open-circuit voltages of the strings and make sure it is
below the maximum DC input voltage of the inverter.
If the input voltage lies within the permissible range while the
fault occurs, please contact the service.
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