Module Alarm Name Alarm
Severity
Causes Suggestion
Power
Converter
PV Module
Fault
Major A PV module
fault, relay
fault, PV self-
check fault,
insulation fault,
or AFCI fault
occurs.
1. Relay fault: The relay is damaged,
the power supply to the relay is
abnormal, or the relay control
signal is abnormal. Power o and
then power on the system
(disconnect the input and loads,
and black start the battery).
Check whether the alarm is
cleared.
2. PV self-check fault: Disconnect
the PV input and reconnect it.
Check whether the alarm is
cleared.
3. Insulation fault: Check whether
PV modules, DC cables, and
connectors are damaged,
whether the insulation layer
deteriorates, and whether the
ambient humidity is high.
4. Contact technical support to
determine the alarm cause.
Power
Converter
PV Module
Abnormal
Shutdown
Major The PV side of
the power
module shuts
down
unexpectedly.
1. Power o and then power on the
system and check whether the
alarm is cleared.
2. Contact technical support to
determine the alarm cause.
Power
Converter
PV Reversely
Connected
Major The input
power cable on
the PV side of
the power
module is in
reverse polarity.
1. Check whether the positive and
negative terminals of the PV
module are correctly connected
to the PV input ports on the
power module. If not, connect the
cables in correct polarity.
2. Power
o and then power on the
system and check whether the
alarm is cleared.
3. Contact technical support.
iSitePower-M (MAP05A1, MAB05B1)
User Manual 12 System Maintenance
Issue 06 (2023-04-24) Copyright © Huawei Digital Power Technologies Co., Ltd. 184
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