Huawei PowerCube 500 User Manual page 47

PowerCube 500 (CPS300-N18A1H)
User Manual
Indicator
Status
Steady
yellow
Blinking
red
Issue 02 (2019-08-30)
Alarm Name Possible Cause
AC Failure  An AC power
failure occurs.

Switch off the AC
input circuit
breaker.
 The input power
cable is aged,
short-circuited, or
open-circuited.
PV Array Fault  The PV input is
disconnected.

The PV module is
faulty.
12VDC output  Output overpower
Protect occurs.

Output short circuit
occurs.
 12 V output
overvoltage occurs.

Ambient
overtemperature
occurs.
24VAC output  Output overpower
Protect occurs.
 Output short circuit
occurs.
 24 V output
Copyright © Huawei Technologies Co., Ltd.
5 Alarms and Troubleshooting
Solution
1. Measure the AC input
voltage and check whether
AC input is unavailable.
 If yes, rectify the power
grid fault.
 If no, go to the next step.
2. Check whether the AC input
circuit breaker is OFF.
 If yes, check and repair
the AC power
distribution, and then
switch on the circuit
breaker.

If no, contact Huawei
technical support.
1. Check whether the PV input
is properly connected.
 If yes, go to the next step.
 If no, reconnect the PV
input.
2. Check whether the PV
module input voltage is in
the range of 24 V to 130 V.
 If yes, contact Huawei
technical support.

If no, replace the PV
module.
1. Check whether the 12 V
output port is short-circuited
or overloaded.
 If yes, rectify the short
circuit or reduce the load.
 If no, go to the next step.
2. Check whether the function
module surface temperature
at noon is less than 45° C.
 If yes, contact Huawei
technical support.

If no, add a sunshade.
1. Check whether the 24 V
output port is short-circuited
or overloaded.
 If yes, rectify the short
circuit or reduce the load.
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