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KP100G
12. Meanings of Error Messages and Their Remedies
Troubleshooting
Your PV-Inverter requires very little maintenance. When unexpected situation occurs, please refer to the following table should further assistance be
required before calling your local dealer. The following table lists common fault messages that display when the fault LED is lit, and their solutions.
Fault Message
Fault definition
The fault current
detected by the inverter
is higher than threshold.
E2-3:Ground I Fault
E1-1: OV (AC over
voltage) error due to
rise in voltage from
the utility.
In Text display
E1-1:Grid OV
E1-2: UV (AC under
E1-2:Grid UV
voltage) error due to
E1-6:Islanding
drop in voltage from
active
the utility.
E1-3: OF (over-
E1-7:OV instantly
frequency) error due
In Error history
to rise in frequency
from the utility.
E1-A
E1-4: UF (under-
frequency) error due
In Text display
to drop in frequency
E1-3:Grid OF
from the utility.
E1-6: Islanding
E1-4:Grid UF
operation detected
In Error history
(active system) due to
E1-B
error in the power
from the utility.
E1-7: Voltage from the
utility has exceeded
383 V.
Inverter is not able to
detect AC voltage.
E1-0:No Utility
The detected PV
voltage is higher than
specification.
E2-1:PV over voltage
Proposed Actions for
Possible Causes
End-user
1. Obstacle, humidity or
1. Disconnect AC connection of
water exits between AC
LINE and/or NEUTRAL
2. Check the AC junction box and
to earth ground.
2. Obstacle, humidity or
water exits between AC
3. Reconnect AC connection, check
LINE and/or NEUTRAL
to earth ground in the
4. If the problem persists, contact the
junction box.
3. The Insulation of AC
wires is broken that could
be bit by rat or any
animals.
4. Inverter is abnormal.
1. The detected AC voltage
1. If this problem occurs seldom
is beyond/under the setting
of inverter.
2. The detected AC
frequency is beyond/under
the setting of inverter.
2. If the problem occurs frequently,
3. AC connection is not
correct.
3. Find the device with high power
4. Grid condition is weak or
unstable.
4. Use inverter software to check the
5. Other high-power
consumption device is
affecting the grid system.
6. The setting of inverter is
5. If the settings are not correct, call
deviated from its default
values.
6. Use inverter software or
7. Inverter is abnormal.
7. Consult your utility power
8. Ask help of your installer.
1. Grid is not available.
1. Make sure the breaker and switch
2. AC connection is incorrect
3. AC switch between
inverter and utility is not
ON.
4. AC fuse and/or breaker is
2. Check the AC wiring.
open.
3. If the problem persists, contact the
5. Inverter is abnormal.
1. The PV array voltage is
1. Open DC connection of inverter
too high.
2. Inverter is abnormal.
2. If the fault continues, contact the
46
inverter by opening AC switch.
wiring of system. Clear obstacle
ONLY IN SAFE CONDITIONS
the status of inverter.
store from which you purchased
the product or your installer.
(such as 1 time a day), no action is
necessary. Operation will restart
automatically when the voltage
from the utility returns to normal.
do the actions below.
consumption near your AC system.
setting of inverter. The setting
should be in the range listed in
specification.
your service for changing.
monitoring device to collect data.
Send the data to professionals for
further investigation.
supplier, understand the grid
conditions.
on AC side are close. Operation
will restart automatically when the
voltage from the utility returns to
normal.
store from which you purchased
the product or your installer.
and reconnect. Operation will
restart automatically when the
solar module output voltage
lowers.
store from which you purchased
the product or your installer.
Proposed Actions for Professionals
1. Disconnect AC side of inverter by
opening AC switch.
2. Disconnect the DC side from the
inverter.
3. Check both the AC and DC wiring
and insulation.
4. Reconnect AC connection, check
the status of inverter
5. If the problem persists, please
replace the inverter.
1. Check the system connection
including polarities and security
first.
2. Find the devices with high power
consumption near the AC system.
3. Consult the utility power supplier,
understand the grid conditions.
4. Use inverter software to monitor
the frequency and voltage.
5. If the measured data beyond the
setting, under the permission of
utility supplier, use the software to
change parameters.
6. If the situation is not improved
after changing parameters, please
replace the inverter.
1. Make sure the breaker and switch
on AC side are close.
2. Check the AC wiring.
3. If the problem persists, please
replace the inverter.
1. Check the open PV voltage, and
see if it is more than or too close to
specification.
2. If PV voltage is much less than
specification and the problem still
occurs, please replace the inverter.
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