Huawei SUN2000 MB0 Series - Page 104

Alar
m ID
Alarm
Name
Alarm
Severity
Possible
Causes
Troubleshooting
2085 Built-in
PID
operati
on
abnorm
al
Minor Cause ID = 1, 2
● The output
resistance of
PV arrays to
ground is
low.
● The system
insulation
resistance is
low.
● Cause ID = 1
1. Turn o the AC output
switch and DC input
switch, wait for a period of
time (for details about the
wait time, see the
description on the device
safety warning label), and
then turn on the DC input
switch and AC output
switch.
2. If the alarm persists,
contact your dealer or
Huawei technical support.
● Cause ID = 2
1. Check the impedance
between the PV array
output and the ground. If a
short circuit occurs or the
insulation is
insucient,
rectify the fault.
2. If the alarm persists,
contact your dealer or
Huawei technical support.
2086
Externa
l fan
abnorm
al
Major Cause ID = 1
The external
fan is short-
circuited, the
power supply is
insucient, or
the air channel
is blocked.
1. Shut down the fan, turn o
the DC switch, check whether
the fan blades are damaged,
and clear the foreign matter
around the fan.
2. Reinstall the fan, turn on the
DC switch, and wait for the
inverter to start. If the alarm
persists after 15 minutes,
replace the external fan.
SUN2000-(12K-25K)-MB0 Series
User Manual 7 System Maintenance
Issue 01 (2023-04-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 98