Huawei NetCol8000-A Maintenance And Troubleshooting Manual page 25

Troubleshooting (4)
Symptom
The humidifcation function fails.
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Possible Cause
The high water level detection
switch is being protected.
The infrared humidifer lamp is
burnt out.
Circuit breakers, fuses, or cables
are disconnected.
The water pan in the infrared
humidifer is not flled with water.
There is no humidifcation
requirement.
Solution
Check whether the high water
level detection switch is faulty.
Replace the faulty switch.
Measure the current of
humidifer. If no current exists,
the lamp of humidifer is
damaged. Replace the lamp.
Disconnect the power supply and
check whether the electric
heater is damaged by checking
the electric heater resistance
properties with an ohmmeter.
Check whether the water
pressure is proper.
Check the status of the water
injection solenoid valve.
Check whether the water
injection pipe is blocked.
Check whether the water inlet
pipe valve is opened.
Check for any requirement on
the LCD.
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