SUN2000-(33KTL, 40KTL)-JP
User Manual
9 Maintenance
Issue 07 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
108
No.
Port
Description
Function
6
PV7/8+
Spot-check port for PV
input string 7+ and 8+
(MPPT 4)
7
PV1/2-
Spot-check port for PV
input string 1– and 2–
(MPPT 1)
8
PV3/4-
Spot-check port for PV
input string 3– and 4–
(MPPT 2)
9
PV5/6-
Spot-check port for PV
input string 5– and 6–
(MPPT 3)
10
PV7/8-
Spot-check port for PV
input string 7– and 8–
(MPPT 4)
11
PCS+
SUN2000 DC+
spot-check port
Measure the impedance
between the SUN2000
DC input and the ground.
12
PCS-
SUN2000 DC–
spot-check port
9.2 Troubleshooting
Alarm severities are defined as follows:
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.
Table 9-5
Common alarms and troubleshooting measures
Ala
rm
ID
Alarm
Name
Alarm
Severit
y
Possible Cause
Suggestion
103
High DC
Input
Voltage
Major
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
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.
