Growatt MTL-S - Error Codes; Error 100: Internal Reference Voltage Fault; Error 101, 102, 121: Communication Error; Error 111: Neutral Line Charged

Growatt New Energy Australia Pty Ltd
C1, 27-29 Fariola Street,
Silverwater NSW 2128
Phone: 02 8065 1298
Email: australia@ginverter.com
Email:
ausupport@ginverter.com
www.ginverter.com
Error codes identify a possible equipment failure, fault ot incorrect inverter setting or
configuration. Tipically, error code can be cleared once the cause or fault is removed. Some
of the error codes may indicate a fatal error and require you to contact the supplier or
Growatt to replace it.
Error code
Description
Suggestion
Error 100
Internal reference voltage
fault
1. Reboot inverter
2. Contact Growatt to
claim warranty
Error 101, Error 102, Error
121
Communication error
1. Reboot inverter
2. Contact Growatt to
claim warranty
Error 111
Neutral line charged
1. Test N line and L line
reversed or not
2. Check the inverter
terminals damaged
or not
3. Contact Growatt for
a warranty if
damaged spot
found.
Error 116
EEPROM fault
4. Reboot inverter
5. Contact Growatt to
claim warranty
Error 117
Relay fault
1. Reboot inverter
2. Contact Growatt to
claim warranty
Error 118
Init model fault
1. Check the dip
switches at
underneath of the
inverter follow 1.2.1
2. Contact Growatt to
claim warranty
Error 119
GFCI Device Damage
1. Reboot inverter
2. Contact Growatt to
claim warranty
Error 120
HCT fault
1. Reboot inverter
2. Contact Growatt to
claim warranty
Error 122
Bus voltage fault
1. Reboot inverter
2. Contact Growatt to
claim warranty