Huawei MTS9300A - 4.1.4 Monitoring Unit

No. Maintenance Item Possible Fault Cause Suggestion
2 Check the yellow indicator
status (normal: o).
Steady on:
● Because the ambient
temperature is high, the
rectier power is limited.
● Because the ambient
temperature exceeds the
upper or lower threshold,
the
rectier shuts down
for protection.
● AC input over/
undervoltage protection
is triggered.
● The
rectier is in
hibernation.
1. Check the ambient
temperature status, and
clean the cabinet air
channel.
2. Rectify faults in the
indoor temperature
control system.
3. Check the AC input
voltage.
4. The
rectier is in
hibernation. No action is
required.
Blinking:
● The rectier
communication has failed
● The rectier is faulty.
1. Check that the rectier
communications cable is
securely connected.
2. Replace the rectier.
3 Check the red indicator
status (normal: o).
Steady on:
● The rectier is latched o
due to output
overvoltage.
● The rectier is faulty.
1. Check that the cabinet is
not connected to an
external DC power source
that has a voltage of
greater than 58.5 V DC.
2. Check that the
rectier
output voltage is within
58.5 V DC.
3. Replace the
rectier.
4.1.4 Monitoring Unit
Table 4-4 SMU maintenance
No.
Maintenance
Item
Possible Cause Suggestion
1 Check the green
indicator status.
● O: There is no DC
input.
● O: The SMU is faulty.
1. Check that the DC input power cable is
securely connected.
2. Check that the communications cable
is securely connected.
3. Replace the SMU.
MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual 4 Maintenance
Issue 06 (2021-10-13) Copyright © Huawei Technologies Co., Ltd. 45