Solar PV Inverter Errors – Power One

Code

Description

Diagnosis/Solution

W001

Insufficient irradiation (Low input voltage on switching on the inverter):

Incorrect configuration of the PV generator or an “on the limit” configuration for the inverter’s minimum input voltage. Quite normal outside of peak sun hours.

W002

Insufficient irradiation (Low input voltage on switching off):

Incorrect configuration of the photovoltaic generator or an “on the limit” configuration for the inverter’s minimum input voltage. Quite normal outside of peak sun hours.

W003

Parameters of grid voltage outside range:

This error signal occurs when during the inverter’s normal operation when the grid voltage parameters are outside the limits set by the installer.

W004

Grid overvoltage:

This error signal occurs when during the inverter’s normal operation when the grid voltage exceeds the maximum limit set by the installer. It suggests the grid voltage is unusually high.

W005

Grid under voltage:

This error signal occurs when during the inverter’s normal operation when the grid voltage exceeds the minimum limit set by the installer. Can indicate grid failure

W006

Grid over-frequency:

This error signal occurs when during the inverter’s normal operation when the grid frequency exceeds the maxi- mum limit set by the operator. It suggests the grid frequency is unusually high, if you are using a generator check the AC output frequency.

W007

Grid under-frequency:

This error signal occurs when during the inverter’s normal operation when the grid frequency falls below the minimum limit set by the installer. Typically found in grid loss scenarios.

W010

Fan Fail

Internal fan module failure. The inverter will eventually overheat. Call an engineer to investigate as most likely a replacement inverter would be required.

W015

Disconnection due to Anti-Islanding:

The inverter lost the grid connection or has been incorrectly connected.

W046

Connection to the grid unsuccessful

The alarm is logged when a Missing grid or Input UV error occurs or due to the manual disconnection of the inverter during the grid connection sequence.

W047

FW update method unsuccessful

The alarm occurs when a firmware update has not been completed.

W048

Automatic disconnection from the grid due to time limit:

If the inverter exceeds the set grid connection time limit set by the grid standard, it will automatically reconnect to the grid to carry out the Riso test.

E001

Input over-current (photovoltaic generator):

The alarm occurs when the inverter’s input current exceeds the inverter’s threshold for maximum input current.

E002

Input overvoltage (photovoltaic generator):

The alarm is generated when the input voltage (from the PV generator) exceeds the inverter’s threshold of maximum input voltage. The alarm occurs before reaching the absolute threshold over which the inverter is damaged. When the inverter’s input voltage exceeds the over-voltage threshold, the inverter will not start up due to the generation of the alarm.

E002

DSP initialisation error:

Internal failure within the DSP circuit. Try a reset. Inverter will likely need replacing.

E004

Bulk over-voltage (DC-DC circuit):

Internal DC fault. Usually this would indicate a failure. Try a reset.  Inverter will likely need replacing.

E005

Communication error inside the inverter

Usually indicates internal/RS485/modbus issues. Try a reset.  Inverter will likely need replacing.

E006

Output overcurrent

The alarm occurs when the inverter’s output current exceeds the inverter’s threshold for maximum output current. Reset inverter.

E007

Saturation recorded on the IGBT components:

The alarm occurs when one of the inverter’s active devices is in a saturated state. Reboot inverter.

E009

Internal error

An internal failure and/or microprocessor corrupted. Reset inverter. Inverter will likely need replacing.

E010

Low “Bulk” voltage (DC-DC)

Low DC charge from the PV array. Reset inverter. Inverter will likely need replacing.

E011

Long wait for “Booster” regime to start:

Error internal to inverter relating to start up time for DC- DC circuit regime (Booster). Reset inverter.

E012

Error in the “Booster” circuit

Error internal to inverter relating to operation of the DC- DC circuit regime (Booster). Reset inverter.

E031

Internal output relay fault

Power output stage failure.

Bolido Comment; A common fault in the older units is a relay failure in the grid coupling stage that ideally requires the inverter be replaced. Unfortunately, we have found these units start to fail from 7 years old. Although achievable, component level repairs are now generally considered to be a false economy due to the elevated risk of another fault and lower costs of comparable new hardware.