Troubleshooting - Huawei SUN2000-33KTL-JP User Manual

SUN2000-(33KTL, 40KTL)-JP
User Manual
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9.2 Troubleshooting

Alarm severities are defined as follows:
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Table 9-5 Common alarms and troubleshooting measures
Ala Alarm Alarm
rm Name Severit
ID y
103 High DC Major
Input
Voltage
Issue 07 (2019-06-30)
Port
PV7/8+
PV1/2-
PV3/4-
PV5/6-
PV7/8-
PCS+
PCS-
Major: The SUN2000 enters the shutdown mode and disconnects from the power grid to
stop generating electricity after a fault occurs.
Minor: Some components are faulty but the SUN2000 can still generate electricity.
Warning: The inverter output power decreases due to external factors.
Possible Cause
 Cause ID = 1
The PV array is not
properly configured.
Excessive PV modules are
connected in series to PV
strings 1 and 2, and
therefore the PV string
open-circuit voltage
exceeds the maximum
Copyright © Huawei Technologies Co., Ltd.
Description
Spot-check port for PV
input string 7+ and 8+
(MPPT 4)
Spot-check port for PV
input string 1– and 2–
(MPPT 1)
Spot-check port for PV
input string 3– and 4–
(MPPT 2)
Spot-check port for PV
input string 5– and 6–
(MPPT 3)
Spot-check port for PV
input string 7– and 8–
(MPPT 4)
SUN2000 DC+
spot-check port
SUN2000 DC–
spot-check port
Suggestion
 Cause ID = 1
Reduce the number of PV modules
connected in series to PV strings 1 and 2
until the open-circuit voltage is less than or
equal to the maximum operating voltage of
the SUN2000. After the PV array
configuration is corrected, the inverter
alarm disappears.
9 Maintenance
Function
Measure the impedance
between the SUN2000
DC input and the ground.
108