Huawei NetCol8000-A013 User Manual page 102

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (800 mm Width)
Alarm Alarm Name
ID
719 InUnit
EEPROM
Alarm
720 InUnit Flash
Alarm
721 InUnit Clock
Abnormal
Alarm
722 Smoke Sensor
Power Alarm
723 Evaporator
Coils Temp
Invalid
801 Return Air
High Temp
Alarm
802 Return Air
Low Temp
Alarm
Issue 05 (2019-12-20)
System Possible Causes
Action
-- The E square of the main
control board of the indoor unit
is faulty.
The The flash memory of the main
compressor control board of the indoor unit
shuts down. is faulty.
-- The clock circuit of the main
control board of the indoor unit
is faulty.
-- The voltage of the smoke
sensor circuit of the main
control board of the indoor unit
exceeds the preset threshold.
1. The temperature sensor
--
cable is not properly
connected.
2. The temperature sensor is
faulty.
1. The heat load is high, or the
--
cooling capacity is
insufficient.
2. The return air temperature is
high shortly after the unit is
started.
3. The ambient temperature
exceeds the upper threshold.
4. The return air high
temperature alarm threshold
is inappropriate for the
working conditions.
5. The temperature displayed
by the temperature sensor is
different from the actual
temperature.
1. The heat load is low or the
--
cooling capacity is too high.
2. The ambient temperature is
too low.
3. The return air low
temperature alarm threshold
is inappropriate for the
working conditions.
4. The temperature displayed
by the temperature sensor is
different from the actual
temperature.
Copyright © Huawei Technologies Co., Ltd.
5 System Operation and Maintenance
Solution
Replace the main control board
of the indoor unit.
Replace the main control board
of the indoor unit.
Replace the main control board
of the indoor unit.
Replace the main control board
of the indoor unit.
1. Check the cable connection
to the temperature sensor.
2. Maintain or replace the
temperature sensor.
1. Add smart cooling products.
2. Check whether other causes
exist if the alarm is not
cleared in a long time after
startup.
3. Check the ambient
temperature.
4. Adjust the return air high
temperature alarm threshold.
5. Calibrate or replace the
temperature sensor.
1. Reduce the number of smart
cooling products.
2. Check the ambient
temperature.
3. Adjust the return air low
temperature alarm threshold.
4. Calibrate or replace the
temperature sensor.
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