Growatt MTL-S Troubleshooting Manual

Growatt New Energy Australia Pty Ltd
C1, 27-29 Fariola Street,
Silverwater NSW 2128
Troubleshooting Guide for Growatt Inverters
Introduction
Due to a large amount of inappropriate outcome of troubleshooting on Growatt inverters,
our Australian office decide to compile a trouble shooting guide for Growatt installer
customers, which aims to resolve the problem in the initial stage of a technical diagnosis of
Growatt inverters and reduce the related cost of its process. We hope this document would
be helpful during a phone or email conversation when facing customer's technical enquiries.
1. Faulty code
Faulty code identifies the current states of the Growatt inverter. Warnings do not relate to a
fault. When a fault code with a number after it appears in the display, it indicates a fault on
the inverter or the system and is usually cleared through an orderly shutdown/re-set or a
self-corrective action performed by the inverter. See the faulty codes in the following table
and corresponding solutions.
The faulty code will display on the first line of the LCD screes of Growatt inverters, please ask
the customers to read this part for you and then you can figure out the phenomenon
accordingly by following sections.
1.1 No AC Connection
Cause: Somewhere disconnected from grid to inverter.
Error message
No AC Connection
1.2 AC V Outrange
Cause: The grid voltage is out of permitted range, or the inverter's voltage limit is incorrect.
MTL-S model
AC V
Non-MTL-S
Outrange
model
Description
No utility grid connected or
utility grid power failure
Purchased after 2017
Phone: 02 8065 1298
Email: australia@ginverter.com
Email:
ausupport@ginverter.com
www.ginverter.com
Solutions
1. Check if AC isolator /solar
main supply switch is on
2. Check if AC cables are
firmly and correctly
connected.
3. Contact Growatt to claim
warranty
Go to 1.2.1
Go to 1.2.3