Message |
Possible cause |
Action |
E01: Grid Freq
Over Rating |
1. Actual utility frequency is
over the OFR setting
2. Incorrect country setting
3. Detection circuit malfunction |
1. Check the utility frequency on the inverter
terminal
2. Check country setting
3. Check the detection circuit inside the
inverter |
E02: Grid Freq
Under Rating |
1. Actual utility frequency is
under the UFR setting
2. Incorrect country or Grid
setting
3. Detection circuit malfunction |
1. Check the utility frequency on the inverter
terminal
2. Check country & Grid setting
3. Check the detection circuit inside the
inverter |
E07:Grid
Quality |
Non-linear load in Grid and
near to inverter |
Grid connection of inverter need to be far
away from non-linear load if necessary |
E09: No Grid |
1. AC breaker is OFF
2. Disconnect in AC plug
3. Internal fuses are broken |
1. Switch on AC breaker
2. Check the connection in AC plug and
make sure it connects to inverter
3. Replace fuses and check all switching
devices in boost & inverter stages |
E10: Grid Volt
Under Rating |
1. Actual utility voltage is under
the UVR setting
2. Utility voltage is under the
Slow UVR setting during
operation
3. Incorrect country or Grid
setting
4. Detection circuit malfunction |
1.&2. Check the utility voltage connection to
the inverter terminal.
3. Check country & Grid setting
4. Check the detection circuit inside the
inverter |
E11: Grid Volt
Over Rating |
1. Actual utility voltage is over
the OVR setting
2. Utility voltage is over the
Slow OVR setting during
operation
3. Incorrect country or Grid setting
4. Detection circuit malfunction |
1.&2. Check the utility voltage on the inverter
terminal
3. Check country & Grid setting
4. Check the detection circuit inside the
inverter |
E13: Slow
Over Voltage
Range |
1. Actual utility voltage is over
the OVR setting
2. Incorrect country or Grid
setting
3. Detection circuit malfunction |
1. Check the utility voltage on the inverter
terminal
2. Check country & Grid setting
3. Check the detection circuit inside the
inverter |
E26:Slow Over
Frequency
Range |
1. Actual utility frequency is
over the OFR setting
2. Incorrect country or grid
setting
3. Detection circuit malfunction |
1. Check the utility frequency on the inverter
terminal
2. Check country setting
3. Check the detection circuit inside the
inverter |
E27:Slow
Under
Frequency
Range |
1. Actual utility frequency is
under the UFR setting
2. Incorrect country or Grid
setting
3. Detection circuit malfunction |
1. Check the utility frequency on the inverter
terminal
2. Check country & Grid setting
3. Check the detection circuit inside the
inverter |
E28: Slow
Under Voltage
Range |
1. Actual utility voltage is under
the UVR setting
2. Incorrect country or Grid
setting
3. Detection circuit malfunction |
1. Check the utility voltage on the inverter
terminal
2. Check country & Grid setting
3. Check the detection circuit inside the
inverter |
E30: DC Volt
Over Rating |
1. Actual Solar1 voltage is over
550Vdc (RPI-H3) or 1000Vdc
(RPI-H5)
2. Detection circuit malfunction |
1. Modify the solar array setting, and make
the Voc less than 550Vdc (RPI-H3) or
1000Vdc (RPI-H5)
2. Check the detection circuit inside the
inverter |
E32: L/N
Reversed |
1. Incorrect AC wiring
2. Incorrect AC connection
setting |
1. Check if brown wire is connected to Line
and blue wire is connected to Neutral.
2. Check display “AC configurat.” setting |
A01: DC Offset
Over Rating |
1. Utility waveform is abnormal
2. Detection circuit malfunction |
1. Check the utility waveform. Grid
connection of inverter need to be far away
from non-linear load if necessary
2. Check the detection circuit inside the
inverter |
A05: NTC Over
Temp |
1. The ambient temp. is over
60℃
2. Detection circuit malfunction |
1. Check the installation ambient and
environment
2. Check the detection circuit inside the
inverter |
A06: Inside
NTC Circuit
Fail |
1. Ambient temp. >100℃ or
<-24℃
2. Detection circuit malfunction |
1. Check the installation ambient and
environment
2. Check the detection circuit inside the
inverter |
A08: Heat Sink
NTC1 Fail |
1. Boost heat sink temp.
>100℃ or <-24℃
2. Detection circuit
malfunction |
1. Check the installation ambient and
environment
2. Check the detection circuit inside the
inverter. |
A09: Heat Sink
NTC2 Fail |
1. Inverter heat sink temp.
>100℃ or <-24℃
2. Detection circuit malfunction |
1. Check the installation ambient and
environment
2. Check the detection circuit inside the
inverter |
A15:DSP ADC
Vgrid/Iout Fail |
1. Auxiliary power circuitry
malfunction
2. Detection circuit malfunction |
1. Check the auxiliary circuitry inside the
inverter
2. Check the detection circuit inside the
inverter |
A16:DSP ADC
Vin/Vbus Fail |
1. Auxiliary power circuitry
malfunction
2. Detection circuit malfunction |
1. Check the auxiliary circuitry inside the
inverter
2. Check the detection circuit inside the
inverter |
A17:DSP ADC
Iin/Iboost Fail |
1. Auxiliary power circuitry
malfunction
2. Detection circuit malfunction |
1. Check the auxiliary circuitry inside the
inverter
2. Check the detection circuit inside the
inverter |
A18:RED. ADC
Vgrid Fail |
1. Auxiliary power circuitry
malfunction
2. Detection circuit malfunction |
1. Check the auxiliary circuitry inside the
inverter
2. Check the detection circuit inside the
inverter |
A19:DSP ADC
Iout_dc Fail |
1. Auxiliary power circuitry
malfunction
2. Detection circuit malfunction |
1. Check the auxiliary circuitry inside the
inverter
2. Check the detection circuit inside the
inverter |
A20:
Efficiency Inconsistent |
1. The calibration is incorrect
2. Current feedback circuit is defective |
1. Check the accuracy of current and power
2. Check the current feedback circuit inside the inverter |
A22: Internal
Comm Fault_R |
1. DSP is idling
2. The communication
connection is disconnected
3. The communication circuit
malfunction |
1. Check reset and crystal in DSP
2. Check the connection between DSP and
COMM
3. Check the communication circuit |
A24: Residual
Curr Over
Rating |
1. PV array insulation fault
2. Large PV array capacitance
between Plus to Ground or
Minus to Ground
3. Either side of boost driver or
boost choke malfunction
4. Detection circuit malfunction |
1. Check the insulation of Solar inputs
2. Check the capacitance (+ <-> GND & –
<-> GND), must < 2.5uF. Install an external
transformer if necessary
3. Check boost driver & boost choke
4. Check the detection circuit inside the
inverter |
A25: Ground
Fault |
1. PV array insulation fault
2. Large PV array capacitance
between Plus to Ground or
Minus to Ground or both.
3. Detection circuit malfunction |
1. Check the insulation of Solar inputs
2. Check the capacitance, dry PV panel if
necessary
3. Check the detection circuit inside the
inverter |
A27: RCMU
Circuit Fail |
1. RCMU is disconnected
2. Detection circuit malfunction |
1. Check the RCMU connection inside the
inverter
2. Check the detection circuit inside the
inverter |
A28: Relay
Short |
1. One or more relays are
sticking
2. The driver circuit for the
relay malfunction |
1. Replace the defective relay(s)
2. Check the driver circuit inside the inverter |
A29: Relay
Open |
1. One or more relays are
abnormal
2. The driver circuit for the
relay malfunction
3. The detection accuracy is
not correct for Vgrid and Vout |
1. Replace the defective relay(s)
2. Check the driver circuit inside the inverter
3. Check the Vgrid and Vout voltage
detection accuracy |
A30: Bus
Unbalance |
1. Not totally independent or
parallel between inputs
2. PV Array short to Ground
3. Driver for boost is defective
or disconnected
4. Detection circuit malfunction |
1. Check the inputs connections
2. Check the PV Array insulation
3. Check the driver circuit for boost inside the inverter
4. Check the detection circuit inside the
inverter |
A31: Bus_P
Over Volt
Rating |
1. Driver for boost is defective
2. Voc of PV array is over
550Vdc (RPI-H3) or 1000Vdc
(RPI-H5)
3. Surge occurs during
operation
4. Detection circuit malfunction |
1. Check the driver circuit for boost inside
the inverter
2. Modify the solar array setting, and make
the Voc less than 550Vdc (RPI-H3) or
1000Vdc (RPI-H5)
3. N/A
4. Check the detection circuit inside the
inverter |
A33: Bus_N
Over Volt
Rating |
1. Driver for boost is defective
2. Voc of PV array is over
550Vdc (RPI-H3) or 1000Vdc
(RPI-H5)
3. Surge occurs during
operation
4. Detection circuit malfunction |
1. Check the driver circuit for boost inside
the inverter
2. Modify the solar array setting, and make
the Voc less than 550Vdc (RPI-H3) or
1000Vdc (RPI-H5)
3. N/A
4. Check the detection circuit inside the
inverter |
A35: Bus Volt
Over Rating |
1. Driver for boost is defective
2. Voc of PV array is over
550Vdc (RPI-H3) or 1000Vdc
(RPI-H5)
3. Surge occurs during
operation
4. Detection circuit malfunction |
1. Check the driver circuit for boost inside
the inverter
2. Modify the solar array setting, and make
the Voc less than 550Vdc (RPI-H3) or
1000Vdc (RPI-H5)
3. N/A
4. Check the detection circuit inside the
inverter |
A36:Output
Curr Transient
Over |
1. Surge occurs during
operation
2. Driver for inverter stage is
defective
3. Switching device is defective
4. Detection circuit malfunction |
1. N/A
2. Check the driver circuit in inverter stage
3. Check all switching devices in inverter
stage
4. Check the detect circuit inside the inverter |
A37: AC Curr
Over Rating |
Detection circuit malfunction |
Check the detect circuit inside the inverter |
A42: CT
Current Sensor Fail |
1.Inverter choke Fail
2.Output Filter Fail
3. Detection circuit malfunction |
1. Check Inverter choke inductance.
2. Check output filter capacitance.
3. Check the detection circuit inside the
inverter |
A45: HW
OOCP |
1. WB1 WB2 misconnection.
2. Detection circuit malfunction |
1. Check the connection of WB1 and WB2.
2. Check the detection circuit inside the
inverter |
A50:Zero
Cross Circuit
Fail |
The detection circuit for
synchronal signal malfunction |
Check the detection circuit for synchronal
signal inside the inverter |
A56:Hardware
Incompatibility |
1. HW power rating incorrect |
1. Check comm. HW power rating info. |
A60: DC Curr
Over Rating |
1. Switching device in boost is
defective
2. Driver for boost is defective
3. Input current detection circuit
malfunction |
1. Check all switching device in boost
2. Check the driver circuit for boost inside
the inverter
3. Check input current detection circuit |
A70: DC Curr
Transient Over |
1. Switching device in boost is
defective
2. Driver for boost is defective
3. Input current detection circuit
malfunction |
1. Check all switching device in boost
2. Check the driver circuit for boost inside
the inverter
3. Check input current detection circuit |