Islanding Protection - Sharp JH-1600E Installation & Operation Manual

Islanding Protection

The inverter will shut down when the power from the grid becomes abnormal or fails. This will provide safety to the
people working on the power lines and protect the home circuits and solar power inverter.
The solar power inverter continually monitors the voltage and frequency of the grid through an internal control circuit. It
will detect an abnormal condition or failure of the grid. Abnormal conditions include AC overvoltage, AC undervoltage,
AC overfrequency, and AC underfrequency. The solar power inverter shuts down and disconnects from the grid should
any of the above conditions occur.
Per AS 4777, the solar power inverter will stop within 2 seconds should the grid voltage be lower than 210 V
than 255 V . The solar power inverter will stop within 1 second should the frequency of the grid be lower than 47 Hz or
AC
higher than 53 Hz.
The solar power inverter incorporates two functions to detect and prevent islanding operation. This is important when
the output of the inverter and the power consumption of the home are well balanced and the voltage or the frequency of
the grid does not change during a power failure, resulting in the power failure not detected. If this occurs, a passive
system that detects a jumping voltage phase and an active system that detects frequency shift that stops the inverter
operation within 2 seconds.
The solar power inverter display indicates utility abnormal to indicate a power failure.
Error / Fault Code List
Type
Utility abnormal
PV array abnormal
Inverter abnormal
EEPROM
21
Code
F-00
F-01
F-02
F-03
F-06
F-07
F-08
F-09
P-11
E15 d-15
E16 d-16
E17 d-17
E18
d-20
E21 d-21
E22 d-22
E23 d-23
E26 d-26
E27 d-27
E28
d-40
Utility over-voltage
Utility under-voltage
Utility frequency over
Utility frequency under
Anti-islanding (frequency over)
Anti-islanding (frequency under)
Miss utility synchronal lock signal
Freq. abnormal (50<->60 Hz)
PV array under voltage (<60 V)
PV array over voltage (>320 V)
Relay sticking
Communication error
Aux-power abnormal
Ground fault
Temperature sensor broken
Output over current
DC offset over rating
Fin high temperature
DC/DC converter abnormal
Relay open
DC bus voltage abnormal
EEPROM abnormal
or higher
AC
Items