Huawei NetCol8000-C User Manual page 193

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
Alar Alarm
m ID Name
Alarm
a193 Supply-air
Pressure diff
invalid
a196 CW valve
feedback
fault alarm
a197 Motorized
damper on
fault
a198 Motorized
damper off
fault
Issue 06 (2020-01-13)
Alarm Impact
Severi
ty
Major An alarm is
triggered.
Major An alarm is
triggered.
Critical N/A
Warnin N/A
g
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
dropped and is jammed.
3. The humidifier float
interconnection terminals
are abnormal.
4. The water inlet solenoid
valve cannot open.
5. Cables of the water inlet
solenoid valve are not
properly connected.
1. The differential pressure
sensor cable is not properly
connected.
2. The pressure tube for the
differential pressure sensor
is reversely connected.
3. The differential pressure
sensor is faulty.
1. The cables to the chilled
water valve are loose or
damaged.
2. The chilled water valve is
faulty.
1. The control cable to the
motorized damper is not
properly connected.
2. The motorized damper is
faulty.
The motorized damper is
faulty.
6 System Operation and Maintenance
Solution
2. Verify that the
humidifier float can
float and drop
properly.
3. Verify that the
humidifier float
interconnection
terminals are properly
connected.
4. Verify that water
flows into the
humidifier pan from
the water inlet pipe of
the humidifier.
5. Verify that cables of
the water inlet
solenoid valve are
properly connected.
NOTE
After the fault is rectified,
click Clear on the alarm
page to manually clear the
alarm.
1. Check the cable
connection to the
differential pressure
sensor.
2. Check the tube
connection to the
differential pressure
sensor.
3. Maintain or replace
the differential
pressure sensor.
1. Check cables to the
chilled water valve.
2. Maintain or replace
the chilled water
valve.
1. Check the feedback
cable connection to
the motorized damper.
2. Maintain or replace
the motorized damper.
Reconnect the motorized
damper cable.
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