Huawei NetCol5000-A025 - Page 236

Symptom Possible Cause Measures
During commissioning or
operation, humidication
is enabled, but the
humidier neither
humidies nor generates
alarms.
The mains fails, or the
output volume of the
humidier is set to 0 in
diagnostic mode.
During commissioning or
operation, turn on the
humidier switch, and set
the output volume of the
humidier to a value
greater than 0 in
diagnostic mode.
The water inlet pipe or
drainpipe leaks.
The water inlet pipe or
drainpipe is not secured
or is broken.
Repair leaks.
Water is continuously
injected into the
humidier cylinder.
The water inlet solenoid
valve fails or cannot be
closed.
Start the humidier
repeatedly in diagnostic
mode. If the problem
persists, replace the water
inlet solenoid valve.
The humidier switch
trips automatically.
The actual current
exceeds the upper
threshold, which causes
the current transformer
to fail. The detected
current is incorrect.
In diagnostic mode, start
the humidier and check
the humidier current.
(The current cannot
exceed 10 A during
normal operation. When
the current exceeds 15 A,
a
humidier overcurrent
alarm will be generated.)
If the current is normal,
check the current
transformer and its cable.
The water level
decreases gradually, but
the humidier cylinder
does not work and no
manual drainage is
ongoing.
The drainage valve
leaks.
Start the drainage
solenoid valve repeatedly
in diagnostic mode. If the
problem persists, replace
the drainage valve.
The humidier cylinder
overows.
Poor water quality
brings severe water
scale at the bottom of
the cylinder. The
drainpipe or drain
outlet is blocked, and
the high water level
sensor is faulty.
Clean the drain outlet and
the cable connection to
the high water level
sensor.
NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width) 6 System Operation and Maintenance
Issue 15 (2020-12-10) Copyright © Huawei Technologies Co., Ltd. 226