23 HPT-15K/17K/20K/25K USER MANUAL
10.
TROUBLE SHOOTING
Earth Fault Alarm
This inverter complies with IEC 62109-2 clause 13.9 for earth fault alarm monitoring.
If an
Earth Fault Alarm
occurs, the
error code 6
will be displayed on the LCD. Red LED
indicator will also light up.
Full Error Code and Corrective Measures
When the PV system does not operate normally, we recommend the following solutions
for quick troubleshooting. If an error occurs, the Error code will be displayed on the
inverter’s screen
, the red LED will light up. The corresponding corrective measures are as
follows:
Error Code
Fault Name
Description
Corrective Measures
1
Functional fault in
Micro-Controller
Unit (MCU)
MCU abnormal self-check in
start process
Disconnect the inverter from the utility grid and the PV array, and
reconnect it after LED turns off.
If this fault is still being displayed, please contact service.
2
A faulty current
sensor detected
AC current sensor detect
current abnormal in the start
process
Disconnect the inverter from the utility grid and the PV array, and
reconnect it after LED turns off.
If this fault is still being displayed, please contact service.
3
Ground fault circuit
interrupter (GFCI)
sensor error
GFCI sensor self-check
abnormal
Disconnect the inverter from the utility grid and the PV array, and
reconnect it after LED turns off.
If this fault is still being displayed, please contact service.
4
A faulty grid relay
detected
The difference between INV
voltage and output voltage
exceeds limit.
1.
Disconnect the inverter from the utility grid and the PV array,
and reconnect it after LED turns off.
2.
If the fault persists, measure the phase to phase voltage and
phase to zero and zero to ground voltage with a multimeter to
ensure that the voltage is normal and the zero to ground
voltage value should not be greater than 10V.
3.
Disconnect the inverter from the utility grid and the PV array,
and reconnect it after LED turns off.
If this fault is still being displayed, please contact service.