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Troubleshooting
Faults
Battery Charge and Discharge Over Current Fault or PV Over Current
SW OCP Fault
Fault or Inverter Over Current
Ÿ
Please contact Panasonic Technical Support
Residual Current Device Sensor Fault
RCD Fault
Ÿ
Please contact Panasonic Technical Support
Rtc Fault
Rtc Fault
Ÿ
Please contact Panasonic Technical Support
Program Write Fails or Incorrent Program Written in
SoftVerFault
Ÿ
Re-write the program
Ÿ
Or contact Panasonic Technical Support
Grid Lost Fault
Grid Lost Fault
Ÿ
System will reconnect if the utility is back to normal
Ÿ
Check if the grid is normal
The Firmware of PV or Inverter or Battery Over Current Fault
TZ Protect Fault
Ÿ
Please contact Panasonic Technical Support
If the Fault LED is not displaying according to section 7.4 when error occurs, check
the following list to make sure that the present state of the installation allows
proper operation of the unit.
— Is the inverter located in a clean, dry, adequately ventilated place?
— Have the DC input breakers been opened?
— Are the cables adequately sized and short enough?
— Are the input and output connections and wiring in good condition?
— Are the configurations settings correct for your particular installation?
— Are the communications cable properly connected and undamaged?
Contact the Panasonic customer support for further assistance. Be prepared to
describe details of your system installation and provide model and serial number of
the unit.
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Diagnosis and solution
10 Maintenance
Inverters do not need any maintenance or correction in most condition, but if the
inverter often loses power due to overheating, the cooling fans on the rear of
house may be covered by dirt.
Clean the cooling fans with a soft dry cloth or brush if necessary.
Only trained and authorized professional personnel who are familiar with the
requirements of safety should perform servicing and maintenance work.
Ø Safety checks
Safety checks should be performed at least every 12 months. Please contact the
manufacturer (Panasonic) to arrange a qualified person with adequate training,
knowledge, and practical experience to perform these tests. (Note: this action is
not covered by warranty). The data should be recorded in an equipment log. If the
device is not functioning properly or fails any test, the device has to be repaired.
For safety check details, refer to Section 2 Safety instruction of this manual.
Recommended Periodic Maintenace
Ø
Only qualified people should perform the following tasks.
While using the inverter, the user should examine the machine regularly:
Ÿ
Check if the indicators of the inverter are in normal state, check if the keys of
the inverter are in normal state. This check should be performed at least
every 6 months.
Ÿ
Check that if the input and output wires are damaged or aged. This check
should be performed at least every 6 months.
For DC Switch, the user should:
Ÿ
1. Check the installation for signs of overload, overheating, and that the
terminals do not exceed the limit of 167℉/75°C under full load.
Ÿ
By operating the switch a few times (5x), the contacts will clean themselves
and the switch will have a longer life.
Maintenance
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