Huawei NetCol8000-E220 User Manual page 153

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Alar
m ID
A018
-01
A018
-01
A018
-01
A018
-01
A018
-01
A018
-01
A025
-01
Issue 06 (2020-08-19)
Alarm Alarm Name
Severit
y
WARNI Indoor fan 5
NG exceed
runtime
alarm
WARNI Exhaust fan 1
NG exceed
runtime
alarm
WARNI Exhaust fan 2
NG exceed
runtime
alarm
WARNI Exhaust fan 3
NG exceed
runtime
alarm
WARNI Exhaust fan 4
NG exceed
runtime
alarm
WARNI Exhaust fan 5
NG exceed
runtime
alarm
WARNI Return air
NG filter blocked
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Probable Cause
The accumulated
runtime of the fan
exceeds the alarm
threshold.
The accumulated
runtime of the fan
exceeds the alarm
threshold.
The accumulated
runtime of the fan
exceeds the alarm
threshold.
The accumulated
runtime of the fan
exceeds the alarm
threshold.
The accumulated
runtime of the fan
exceeds the alarm
threshold.
The accumulated
runtime of the fan
exceeds the alarm
threshold.
1. Air filters are
blocked or dirty.
2. The differential
pressure switch is
faulty.
3. An inappropriate
threshold is set for
the differential
pressure switch.
4. The pressure tube
of the differential
pressure switch is
blocked or
disconnected.
5. The cables to the
differential pressure
switch are loose or
damaged.
Solution
1. Maintain or replace
the fan, and clear the
accumulated runtime.
1. Maintain or replace
the fan, and clear the
accumulated runtime.
1. Maintain or replace
the fan, and clear the
accumulated runtime.
1. Maintain or replace
the fan, and clear the
accumulated runtime.
1. Maintain or replace
the fan, and clear the
accumulated runtime.
1. Maintain or replace
the fan, and clear the
accumulated runtime.
1. Maintain or replace
the air filters.
2. Replace the
differential pressure
switch.
3. Adjust the threshold
set for the differential
pressure switch.
4. Dredge or replace
the pressure tube.
5. Check the cables to
the differential
pressure switch.
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