Huawei NetCol5000-C Series User Manual page 153

NetCol5000-C030 In-row Chilled Water Smart Cooling
Product
User Manual (Simple Configuration)
Alarm Alarm Name
ID
a007 Return-air 3
T/H brd comm
failed
a018 Indoor fan
1/2/3/4/5/6
exceed
runtime
a022 Humidifier
exceed
runtime
a023 Elec heater 1
HT
a024 Elec heater 1
exceed
runtime
a025 Air filter
blocked
Issue 09 (2020-01-10)
Severity System
Operation
Major The alarm is
generated.
Warning The alarm is
generated.
Warning The alarm is
generated.
Major The alarm is
generated.
Warning The alarm is
generated.
Warning The alarm is
generated. Shut
down the heating
and
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
2. The T/H sensor is
faulty.
1. The cables to the
T/H sensor are
loose or damaged.
2. The DIP switch of
the T/H sensor is
set incorrectly.
3. The T/H sensor is
faulty.
4. The
communication
port of the control
board is faulty.
The accumulated
runtime of the fan
exceeds the alarm
threshold.
The accumulated
runtime of the
humidifier exceeds
the alarm threshold.
1. The temp switch
probes are located
inappropriately.
2. The cables to the
temp switch of the
elec heater are
loose or damaged.
3. The temp switch is
faulty.
4. The manual reset
temp switch has
not been reset.
5. The indoor fan is
faulty.
The accumulated
runtime of the elec
heater exceeds the
alarm threshold.
1. Air filters are
blocked.
2. The differential
press switch is
Recovery Measures
the abnomal T/H
sensors.
2. Calibrate or replace
the abnomal T/H
sensors.
1. Check the cables to
the T/H sensor.
2. Set the DIP switch
of the T/H sensor
correctly.
3. Calibrate or replace
the abnomal T/H
sensors.
4. Maintain or replace
the control board.
Maintain or replace the
indoor fan and clear the
accumulated runtime.
Maintain or replace the
humidifier and clear the
accumulated runtime.
1. Adjust the positions
of the temp switch
probes.
2. Check the cables to
the temp switch of
the elec heater.
3. Maintain or replace
the humidifier temp
switches.
4. Reset the manual
reset temp switch.
5. Maintain or replace
the indoor fan.
Maintain or replace the
elec heater and clear the
accumulated runtime.
1. Maintain or replace
the air filters.
2. Replace the
differential press
144