NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5.2 Alarm Reference
Table 5-5 describes the alarm reference of the NetCol5000-A.
If the Clear icon is displayed on the Details screen, the alarm can be manually cleared by
tapping the Clear button after the fault is rectified. The alarm clearance type (automatic or
manual) varies with precision air conditioners. Alarms can be cleared are a009, a013, a025,
a046, a058, a061, a062, a064, a079, a095, a130, a137, a179, a182, a190.
Table 5-5 Alarm description
Return-air
1 temp
invalid
Return-air
2 temp
invalid
1. The cables to the T/H
sensor are loose or
damaged
2. The T/H sensor is faulty.
1. Remove dirt or water
from the T/H sensor.
2. Maintain or replace the
T/H sensor.
1. The load is high or the
refrigeration capacity is
insufficient.
2. The ambient temp is
high.
3. The return-air HT alarm
threshold is
inappropriate.
4. The temp displayed is
different from the actual
temp.
1. Add more air conditioner
units or Consult
Huawei technical
support.
2. Check other causes if the
alarm persists after
startup.
3. Adjust the return-air HT
alarm threshold.
4. Calibrate or replace the
abnormal sensors.
1. The load is low.
2. The ambient temp is low.
3. The return-air LT alarm
threshold is
inappropriate.
4. The temp displayed is
different from the actual
temp.
1. Please consult Huawei
technical support.
2. Check other causes if the
alarm persists after
startup.
3. Adjust the
undertemperature alarm
threshold.
4. Calibrate or replace the
abnormal sensors.
Return-air
2 humid
invalid
1. The cables to the T/H
sensor are loose or
damaged.
2. The T/H sensor is faulty.
1. Remove dirt or water
from the T/H sensor.
2. Maintain or replace the
T/H sensor.
1. Check the cables to the
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