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10
Trouble shooting
Sometimes, the PV Inverter does not work normally, we recommend the following
solutions for common troubleshooting. The following table can help the technician to
understand the problem and take action.
10.1 Errors(E)
Errors(E) codes identify a possible equipment failure, fault or incorrect inverter setting
or configuration. Any and all attempts to correct or clear a fault must be performed by
qualified personnel. Typically, the (E) code can be cleared once the cause or fault is
removed. Some of the (E) codes, Error as indicated in the table below, may indicate a
fatel error and require you to contact the supplier or the Growatt to replace a new one.
Error code
Description
Suggestion
Error: 101
Communication fault Slave
processor can not receive
data from Master processor
1. Restart inverter
2. If error message still exists, contact
Growatt
Error: 102
1. Restart inverter
2. If error message appears frequently or
error message still exists after
replacement, check utility grid. If you
require help, contact Growatt.
3. If error message still exists, contact
Growatt
Error: 111
Error: 116
Error: 117
Error: 118
Error: 119
Error: 120
Error: 121
Error: 122
PE abnormal
EEPROM fault
Relay fault
Initial model fault
GFCI Device Damage
HCT fault
Communication fault.
Master processor can not
receive data from Slave
processor.
BUS voltage fault
1.Check PE, to ensure that the PE line
contact good.
2. Check the L and the N line to ensure
that they are not reversed.
3. Restart inverter
4. If error message still exists, contact
Growatt
Contact Growatt
Contact Growatt
Contact Growatt
Contact Growatt
Contact Growatt
Contact Growatt
1. Restart inverter
2. If error message still exists,
contact Growatt
Consistent fault. Data
received by Master and
Slave processor are
different. The reason can
be utility grid voltage or
frequency change
frequently.
10.2 Warnings(W)
Warnings(W) identify the current status of the Growatt 8-10K MTLP-S inverter.
Warnings do not relate to a fault. When a (W) with a number after it appears in the
display, it indicates a Warning Code and is usually cleared through an orderly
shutdown/re-set or a self corrective action performed by the inverter. See the (W)
codes in the following table.
Warning code
Meanings
Suggestion
Warning 100
Warning 103
Warning 104
Warning 105
No AC Connection
AC V Outrange
AC F Outrange
Over Temperature
PV Isolation Low
Output Hight DCI
Residual High
PV voltage High
Internal fan malfunction
Fail to read EEPROM
DSP and COM firmware
version unmatch
Fail to write EEPROM
No utility grid connected
or utility grid power
failure
Utility grid voltage is out
of permissible range
Utility grid frequency is
out of permissible range
Temperature outrange
Insulation problem
Output current DC
offset too high
Leakage current too high
The DC input voltage is
exceeding the
maximum value
Restart the inverter. If the warning
still exists, please contact Growatt.
Restart the inverter. If the warning
still exists, please contact Growatt.
Update program
Restart the inverter. If the warning
still exists, please contact Growatt.
1. Check AC wiring and switch state,
especially the ground wire.
2. Clear malfunction, Restart inverter.
1. Shut down the inverter, check grid
voltage.
2. Ensur grid voltage is right, restart
inverter.
1. Check grid frequency range
2. Restart inverter
1. Check the inverter operation state
2.Lower ambient temperature,
restart inverter
1. Check if PV panel enclosure ground
properly
2. Check if inverter ground properly
3. Check if the DC breaker gets wet
4. Clear malfunction, restart inverter
5. Clear the PV array firn and
desiccate
Restart the inverter. If the warning
still exists, please contact Growatt.
Restart the inverter. If the warning
still exists, please contact Growatt.
Disconnect the DC switch
immediately, then Check the PV
input voltage.
