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KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
No.:
E36 / E38
Description
Step
E36-GFCI failure / E38--ISO error
1
This error occurs if the inverter determines that the system leakage current exceeds the requirements
of the safety standards (200k Ohms).
2
Please check whether the fault occurs in wet and rainy weather. Also check whether the fault
disappears when the weather is dry and sunny. If this is not the case, the inverter is not the cause of
the fault.
3
Using a multimeter, check whether the voltage PV+ and PV+ to earth is normal. It should be half of
PV+ and PV-. Connect the strings individually to check which string is causing the error.
4
Carry out a visual inspection of all PV strings and connections and make sure that the grounding is
reliable.
5
If there is an inverter of the same model in operation on site, use it to replace the failed inverter and
check whether the failure was caused by the inverter.
No.:
E37
Description
Step
PV overvoltage
1
This error occurs if the inverter determines that the DC input voltage exceeds the maximum DC
voltage of the inverter.
2
Remove all strings from the inverter and use the multimeter to measure the voltage between PV+ and
PV+ for each string. The total voltage must not exceed the maximum DC voltage of the inverter.
3
If the measured voltage is normal, there may be an error in the inverter. Please contact customer
service to replace the inverter.
No.:
E40
Description
Step
Overtemperature in the inverter
1
This error occurs when the inverter detects a high temperature in the inverter.
2
Check for foreign bodies in the fan or heat sink of the inverter which could be the cause of
overtemperature in the inverter.
3
Please check the ambient temperature when installing the inverter (below 40 °C) and do not expose
the inverter to sunlight. If the error cannot be remedied, please contact customer service to replace
the inverter.
No.:
W165
Description
Step
PE connection error
1
This error occurs when the inverter detects overvoltage in the N-PE.
2
Using the multimeter, measure the N-PE voltage of the inverter.
3
Make sure that the grounding cable is not loose, that it is firmly connected, and that the connection
area is adequate.
4
If the error is not remedied, please contact customer service to replace the inverter.