Others; Error Messages - LG LGES-5048 User Manual

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OTHERS

4.1 Error Messages

The error messages below will be displayed on LGES PV Master or reported by e-mail if an error
occurs.
ERROR MESSAGE EXPLANATION
Public grid power is not available (power
Utility Loss
lost or on-grid connection fails)
Grid voltage is not within permissible
VAC Failure
range
Grid frequency is not within permissible
FAC Failure
range
Temperature inside of the inverter is too
Over Temperature
high
ISO failure could be caused by
multiplereasons like PV panels are not
grounded well, DC cable is broken, PV
Isolation Failure
panels are aged or surrounding
humidity is comparatively higher, etc.
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Ground Failure Ground leakage current is too high
Relay Check Failure
Self checking of relay failure
DC Injection High
/
EEPROM R/W Failure /
Internal communication fails
SPI Failure
DC Bus High BUS voltage is over-high
Back-up side is overloaded
Back-Up Overload
REASON
Inverter does not detect the connection of grid
Inverter detects that AC voltage is beyond the normal
range required by the safety country
Inverter detects that the grid frequency is beyond the
normal range required by the safety country
The inverter's working environment leads to a high
temperature condition
Isolation failure could be caused by multiple reasons like
that the PV panels are not grounded well, DC cable is
broken, PV panels are aged or surrounding humidity is
comparatively heavy, etc.
Ground failure could be caused by multiple reasons like
that the neutral cable on the AC side is not connected
well or the surrounding humidity is comparatively heavy,
etc.
Neutral & ground cables are not connected well on AC
side or just an occasional failure
The inverter detects a higher DC component in AC output
Caused by a strong external magnetic field etc.
Caused by a strong external magnetic field etc.
/
Total back-up load power is higher than the back-up
nominal output power
SOLUTIONS
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 off AC breaker and turn on again in 5 mins.
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.
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.
1. Try to decrease surrounding temperature.
2. Make sure the installation complies with the instruction on inverter user manual.
3. Try to close the inverter for 15 mins, then start up again.
1. Use multi-meter to check if the resistance between earth & inverter frame is close to zero. If it's not, please ensure that the connection is well.
2. If the humidity is too high, isolation failure may occur.
3. Check the resistance betwen PV1+/PV2+/BAT+/PV- to earth.If the resistance is lower than 33.3k, check the system wiring connection.
4. Try to restart the inverter.Check if the fault still occurs. If not, it means it is caused by an occasional situation, or contact after-sales.
Check (use multi-meter) if there is voltage (normally should be close to 0V) between earth & inverter frame. If there is a voltage, it means the neutral &
ground cables are not connected well on the AC side. If it happens only in the early morning/dawn /rainy days with higher air humidity and is recovered
soon, it should be normal.
Check (use multi-meter) if there is high voltage (normally should be lower than 10V) between N & PE cable on the AC side. If the voltage is higher than
10V, it means the Neutral & ground cable are not connected well on AC side or restart inverter.
Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
Decrease back-up loads to make sure the total load power is lower than back-up nominal output power (please refer to page 11).
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