Monitoring Unit - Huawei MTS9300A User Manual

MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual
No. Maintenance Item
2 Check the yellow indicator
status (normal: off).
3 Check the red indicator
status (normal: off).

4.1.4 Monitoring Unit

Table 4-4 SMU maintenance
No. Maintenance
Item
1 Check the green
indicator status.
Issue 06 (2021-10-13)
Possible Fault Cause
Steady on:
● Because the ambient
temperature is high, the
rectifier power is limited.
● Because the ambient
temperature exceeds the
upper or lower threshold,
the rectifier shuts down
for protection.
● AC input over/
undervoltage protection
is triggered.
● The rectifier is in
hibernation.
Blinking:
● The rectifier
communication has failed
● The rectifier is faulty.
Steady on:
● The rectifier is latched off
due to output
overvoltage.
● The rectifier is faulty.
Possible Cause
● Off: There is no DC
input.
● Off: The SMU is faulty.
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Suggestion
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 rectifier is in
hibernation. No action is
required.
1. Check that the rectifier
communications cable is
securely connected.
2. Replace the rectifier.
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 rectifier
output voltage is within
58.5 V DC.
3. Replace the rectifier.
Suggestion
1. Check that the DC input power cable is
securely connected.
2. Check that the communications cable
is securely connected.
3. Replace the SMU.
4 Maintenance
45