EVVO 20000TLG23P~EVVO 33000TLG23P
EVVO 20000TLG23P~EVVO 33000TLG23P
57
58
7
Trouble shooting and maintenance
Outlines of this chapter
This topic describes how to perform daily maintenance and troubleshooting to ensure long-
term proper operation of the inverter.
7.1 Trouble shooting
This section contains information and procedures for solving possible problems with the
inverter.
In case of problem with inverter, check the following tips.
Check the warning fault messages or Fault codes on the inverter information panel. Record
it before doing anything further.
If inverter does not display any Fault, please check the following lists.
-
Is the inverter located in a clean, dry, adequately ventilated place?
-
Is the DC switch turned ON?
-
Are the cables adequately sized and short enough?
-
Are the input and output connections and wiring in good condition?
-
Are the configuration settings correct for the particular installation?
-
Are the display panel and the communications cable properly connected and undamaged?
Follow the steps below to view recorded problems:
Press
“ESC” to enter the main menu in the normal interface. In the interface screen select
“Event List”, then press “OK” to enter events.
EventList information
Table 7-1 Eventlist
EventList NO.
EventList Name
EventList description
solution
ID01
Grid OVP
The power grid voltage is
too high
If the alarm occurs occasionally, the possible cause
is that the electric grid is abnormal occasionally. The
inverter automatically returns to normal operating
status when the electric grid’s back to normal.
ID02
Grid UVP
The power grid voltage is
too low
If the alarm occurs frequently, check whether the
grid voltage/frequency is within the acceptable
range. If no, contact the technical support. If yes,
check the AC circuit breaker and AC wiring of the
inverter.
ID03
Grid OFP
The power grid frequency is
too high
If the grid voltage/frequency is within the acceptable
range and AC wiring is correct, while the alarm
occurs repeatedly, contact The technical support to
change the grid over-voltage, under-voltage, over-
frequency, under-frequency protection points after
ID04
Grid UFP
The power grid frequency is
too low
obtaining approval from the local electrical grid
operator.
ID05
PVUVP
The input voltage is too low
Check whether too few PV modules are series
connected in a PV string, thus the voltage(Vmp) of the
PV string is lower than the minimum operating
voltage of the inverter. If yes, adjust the number of
series connected PV modules to increase the voltage
of the PV string to fit the input voltage range of The
inverter. The inverter automatically returns to normal
operating status after correct adjustments.
ID06
Vlvrtlow
Low voltage across
Check the AC wiring connection to the electric grid, if
it’s correct, please contact The technical support
.
ID07-ID08
Reserved
Reserved
Reserved
ID09
PvOVP
The input voltage is too
high
Check whether too many PV modules are series
connected in a PV string, thus the voltage(Voc) of the
PV string is higher than the maximum input voltage of
The inverter. If yes, adjust the number of series
connected PV modules to decrease the voltage of the
PV string to fit the input voltage range of The inverter.
The inverter automatically returns to normal operating
status after correct adjustments.
ID10
IpvUnbalance
Input current is not
balanced
Check the input mode(parallel mode/ independent
mode) setting of The inverter according to Section 4.5
of this user manual.
ID11
PvConfigSetWrong
Incorrect input mode
ID12
GFCIFault
GFCI Fault
If the fault occurs occasionally, the possible cause is
that the external circuits are abnormal occasionally.
The inverter automatically returns to normal
operating status after the fault is rectified.
If the fault occurs frequently and lasts a long time,
check whether the insulation resistance between the
PV array and earth(ground) is too low, then check
the insulation conditions of PV cables.
ID13
GridFault
Phase sequence errors
If the alarm occurs occasionally, the possible cause
is that the electric grid is abnormal occasionally.
The inverter automatically returns to normal
operating status when the electric grids back to
normal.
If the alarm occurs frequently, check whether the
grid voltage/frequency is within the acceptable
range. If no, contact The technical support. If
yes, check the AC circuit breaker and AC wiring of
the The inverter.
ID14
Hw Boost OCP
Ihe input current is too
high, and has happen
hardware protection
Check whether the input current is higher than the
maximum input current of The inverters, then check
the input wiring, if both are correct, please contact The
technical support.
ID15
Hw Ac OCP
The grid current is too
high, and has happen
hardware protection
ID15-ID24 are internal faults of The inverter, turn
OFF the “DC switch”, wait for 5 minutes, then turn
ON the “DC switch”. Check whether the fault is
rectified. If no, please contact The technical support.
ID16
Ac Rms OCP
The grid current is too high
ID17
Hw ADFault I Grid
The grid current sampling
error
ID18
Hw ADFaultDCI
The DCI sampling error
ID19
Hw AD Fault V Grid
The grid voltage sampling
error
ID20
GFCI Device Fault
The GFCI sampling error
ID21
MChip_Fault
The master chip fault
ID22
HwAuxPowe rFault
The auxiliary voltage error
ID23
BusVolt Zero Fault
The bus voltage sampling
error
ID24
Iac Rms Unbalance
The Output current is not
balanced
