Growatt MAC 15-20KTL3-XL, Installation & Operation Manual

Errors  codes  identify  a  possible  equipment  failure,  fault  or  incorrect  inverter  setting  or 
configuration,  any  or  all  attempts  to  correct  or  clear  a  fault  must  be  performed  by 
qualified personnel.
Typically, the error code can be cleared once the cause or fault is removed.
Some of error code as table shows below, may indicate a fatal error and require you to 
contact the supplier or Growatt for help.

Error Code

Description

Suggestion

Error 200

AFCI Fault

1.After shutdown,Check the panel terminal.
2.Restart inverter.
3.If error message still exists,contact 
manufacturer.

Error 201

Leakage current 
too high

1.Restart inverter.
2.If error message still exists,contact 
manufacturer.

Error 202

The DC input 

voltage is 

exceeding the 

maximum 

tolerable value.

1.Immediately disconnect the DC switch and 

check the voltage

2:.If the fault code still exists after the normal 

voltage is restored, contact manufacturer

Error 203

PV Isolation Low

1.After shutdown,Check if panel enclosure 
ground properly.
2.If error message still exists,contact 
manufacturer

Error 300

AC V Outrange

1.Check grid voltage.
2.If the error message still exists despite the grid 
voltage being within the tolerable range, contact

Error 302

No AC Connection

1.After shutdown,Check AC wiring.

2.If error message still exists,contact 

manufacturer

Error 303

PE abnormal

1.Check PE,to ensure that the PE line contact 
good.
2.If error message still exisits,contact 
Manufacturer

Error 304

AC F Outrange

1.Restart inverter.

2.If error message still exists,contact 

manufacturer.

9.2.2 Error

Error 402

Output DC 

current too high

1.Restart inverter.

2.If error message still exists,contact manufacturer.

Error 403

Output current 
unbalance

1.After shutdown,Check the output current is not 
balanced.
2.If the error message still exists, contact  
manufacturer

Error 404

bus sample fault

1.Restart inverter.

2.If error message still exists,contact manufacturer.

Error 405

Relay fault 

1.Restart inverter.

2.If error message still exists,contact manufacturer

Error 408

NTC Temperature 

too high

1.After shutdown,Check the temperature, normal 

restart the inverter

2.If the error message still exists, contact 

manufacturer

Error 409

Bus  voltage 

abnormal

1.Restart inverter.

2.If error message still exists,contact manufacturer.

Error 411

Communication 
fault

1.After shutdown,Check communication board 
wiring
2. If the error message still exists, contact 
manufacturer

Error 413

IGBT drive fault

1.Restart inverter.

2.If error message still exists,contact manufacturer

Error 415

Internal power 

test fail

（

PV 

Power low

）

1.Restart inverter.

2.If error message still exists,contact manufacturer

Error 416

Over current 
protected by 
software

1.Restart inverter.
2.If error message still exists,contact manufacturer.

Error 420

GFCI Module 
damage

1.After shutdown,Check the leakage current 
module
2 .If the error message still exists, contact  
manufacturer

Error 422

sampling is 

inconsistent

1.Restart inverter.

2.If error message still exists,contact manufacturer

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