7.1 Trouble shooting
This section contains information and procedures for solving possible problems with the
20~33KTL-G2 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.
EventList information
solution
EventList Name
EventList NO.
GridOVP
ID01
GridUVP
ID02
GridOFP
ID03
GridUFP
ID04
Trouble shooting and maintenance
7
Outlines of this chapter
This topic describes how to perform daily maintenance and troubleshooting to ensure long-
term proper operation of the 20~33KTL-G2 inverter.
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.
Table 7-1 Eventlist
HwAcOCP
AcRmsOCP
HwADFaultIGrid
PVUVP
Vlvrtlow
Reserved
PvOVP
IpvUnbalance
PvConfigSetWrong
GFCIFault
HwBoostOCP
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 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 inverter.
inverter automatically returns to normal operating
status after correct adjustments.
Check the AC wiring connection to the electric grid, if
it’s correct, please contact technical support
.
Reserved
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
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 inverter. inverter
automatically returns to normal operating status after
correct adjustments.
Check the input mode(parallel mode/ independent
mode) setting of inverter according to Section 4.5 of
this user manual.
If the fault occurs occasionally, the possible cause is
that the external circuits are abnormal occasionally.
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.
57
58
If the alarm occurs occasionally, the possible cause
is that the electric grid is abnormal occasionally.
inverter automatically returns to normal operating
status when the electric grid’s back to normal.
If the alarm occurs frequently, check whether the
grid voltage/frequency is within the acceptable
range. If no, contact technical support. If yes, check
the AC circuit breaker and AC wiring of the
inverter.
If the grid voltage/frequency is within the acceptable
range and AC wiring is correct, while the alarm
occurs repeatedly, contact technical support to
change the grid over-voltage, under-voltage, over-
frequency, under-frequency protection points after
obtaining approval from the local electrical grid
operator.
HwADFaultDCI
ID24
ID23
ID22
ID21
ID20
ID15
ID16
ID17
ID05
ID06
ID09
ID10
ID11
ID12
ID13
ID14
ID07-ID08
ID18
HwADFaultVGrid
ID19
GFCIDeviceFault
Check whether the input current is higher than the
maximum input current of inverters, then check the
input wiring, if both are correct, please contact
technical support.
MChip_Fault
HwAuxPowerFault
BusVoltZeroFault
IacRmsUnbalance
ID15-ID24 are internal faults of 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 technical support.
GridFault
EventList description
The power grid voltage is
too high
The power grid voltage is
too low
The power grid frequency is
too high
The power grid frequency is
too low
The input voltage is too low
Low voltage across
Reserved
The input voltage is too
high
Input current is not
balanced
Incorrect input mode
GFCI Fault
Phase sequence errors
Ihe input current is too
high,and has happen
hardware protection
The grid current is too
high,and has happen
hardware protection
The grid current is too high
The grid current sampling
error
The DCI sampling error
The grid voltage sampling
error
The GFCI sampling error
The master chip fault
The auxiliary voltage error
The bus voltage sampling
error
The Output current is not
balanced
If the alarm occurs occasionally, the possible cause
is that the electric grid is abnormal occasionally.
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 technical support. If
yes, check the AC circuit breaker and AC wiring of
the inverter.
20~33KTL-G2
User manual
20~33KTL-G2
User manual
