Huawei NetCol5000-A User Manual page 194

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
Table 6-8 Humidifier Faults
No.
1
2
3
4
5
6
7
Issue 13 (2019-01-15)
Symptom
Water spouts when it is
charged into the
humidifier cylinder for
the first time.
In the commissioning or
running period,
humidification is
enabled, but the
humidifier neither
humidifies nor generates
alarms.
The water inlet pipe or
drainpipe leaks.
Water is continuously
charged into the
humidifier cylinder.
The humidifier circuit
breaker trips
automatically.
The water level decreases
gradually, but the
humidifier cylinder does
not work and no manual
drainage is ongoing.
The humidifier cylinder
overflows.
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6 System Operation and Maintenance
Possible Cause
Bubbles exist in the
water inlet pipe when
water is charged into the
humidifier for the first
time.
The mains fail, or the
manual drainage switch
is not turned to "O:
Normal humidifying".
The water inlet pipe or
drainpipe is not secured
or is broken.
The water inlet solenoid
valve fails and cannot be
closed.
The actual current
exceeds the upper
threshold, which causes
the current transformer to
fail. The detected current
is incorrect.
The drainage valve leaks.
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.
Measures
During the initial
power-on
commissioning, gently
open the front valve.
In the commissioning or
running period, switch on
the humidifier circuit
breaker and flip the
manual drainage switch
to "O: Normal
humidifying".
Repair leaking parts.
Manually start the
humidifier several times.
If the problem persists,
replace the water inlet
solenoid valve.
Start the humidifier and
check the humidifier
current. The appropriate
current is less than 4 A. If
the current exceeds 6 A,
the current breaker will
shutdown automatically.
If the current is
reasonable, check the
current transformer and
its cable.
Manually start the
drainage valve several
times. If the problem
persists, replace the
drainage valve.
Clean the drain outlet and
check the high water
level sensor cable is
properly connected.
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