Sofarsolar 30000TL User Manual Download Page 31

Page: 31 / 35

7.1 Trouble shooting

This section contains information and procedures for solving possible problems with the sofar
30~40KTL 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

Outlines of this chapter

This topic describes how to perform daily maintenance and troubleshooting to ensure long-
term proper operation of the sofar 30~40KTL 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  SOFAR  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  SOFAR  inverter.  SOFAR  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 SOFAR 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
SOFAR  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  SOFAR
inverter.  SOFAR  inverter  automatically  returns  to
normal operating status after correct adjustments.

Check the input mode(parallel mode/ independent
mode) setting of SOFAR 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.
SOFAR  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.

Shenzhen SOFARSOLAR Co ., Ltd.

User manual

Trouble shooting and maintenance

If  the  alarm  occurs  occasionally,  the  possible  cause
is  that  the  electric  grid  is  abnormal  occasionally.
SOFAR  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  SOFAR  technical  support.  If
yes, check the AC circuit breaker and AC wiring of
the SOFAR inverter.
If the grid voltage/frequency is within the acceptable
range  and  AC  wiring  is  correct,  while  the  alarm
occurs repeatedly, contact SOFAR 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  SOFAR  inverters,  then
check  the  input  wiring,  if  both  are  correct,  please
contact SOFAR technical support.

MChip_Fault

HwAuxPowerFault

BusVoltZeroFault

IacRmsUnbalance

ID15-ID24 are internal faults of SOFAR 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  SOFAR  technical
support.

Reserved

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

I n p u t c u r r e n t i s n o t
balanced

Incorrect input mode