Huawei iSitePower-M MAP05A1 - Page 192

Module Alarm Name Alarm
Severity
Causes Suggestion
Power
Converter
PV Module
Protected
Minor PV module
protection,
input
overvoltage/
undervoltage
protection, bus
overvoltage/
undervoltage
protection, PV
low irradiance,
or internal
overtemperatur
e occurs.
1. For input overvoltage/
undervoltage protection: Check
whether the PV input voltage is
within the normal MPPT voltage
range using the mobile app,
management system, or a
multimeter.
● FusionSolar app (local
commissioning): Home >
Sampling Equipment >
Power Converter > PV Input
Voltage(V)
● Management system:
Navigate to the device and
choose Power Converter >
Details > PV Input Voltage.
2. For PV low irradiance: Generally,
a low irradiance alarm is likely to
be generated in the early
morning or at dusk. The alarm
can be manually cleared on the
mobile app or automatically
cleared after the system runs for
30 minutes (at most) under
normal irradiance.
3. For internal overtemperature: If
the internal temperature of the
power module exceeds the
protection threshold, check
whether the ambient
temperature is too high or
whether the heat sink is blocked.
Disconnect loads, let the system
run for a period of time, and
check whether the alarm is
automatically cleared.
4. If the alarm persists, contact
technical support.
iSitePower-M (MAP05A1, MAB05B1)
User Manual 12 System Maintenance
Issue 06 (2023-04-24) Copyright © Huawei Digital Power Technologies Co., Ltd. 183