Huawei NetCol5000-A035 User Manual page 210

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width)
Symptom
The compressor exhaust
temperature is too low.
The compressor suction
temperature is too low
or liquid returns.
Compressor generate
excessive noises.
An indoor fan fails to
start.
Issue 17 (2020-10-22)
Possible Cause
An outdoor fan fails.
Refrigerant is
insufficient.
The outdoor fan speed
controller fails.
Refrigerant is leaking.
The refrigerant filled is
insufficient.
The indoor temperature
is too low.
Filters are clogged with
dirt.
The superheat degree
that is set with the
thermostatic expansion
valve is inappropriate.
The sensing bulb is
disconnected from the
thermostatic expansion
valve.
The external excess
pressure is too high, and
air decreases.
The condensing pressure
is too low.
Liquid returns in a
compressor.
The lubricant is
insufficient.
The transport sheet
metal is not removed
from a compressor.
Either the main circuit
breaker or the indoor fan
circuit breaker is not
switched on.
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6 System Operation and Maintenance
Solution
Check whether the
outdoor fan works.
Increase the amount of
refrigerant filled.
Replace the speed
controller.
Check the pipeline for
any leakage.
Add the refrigerant.
Change the temperature
setting.
Replace the filters.
Adjust the thermostatic
expansion valve to an
optimal degree.
Check whether the
thermometer bulb is
disconnected from the
thermostatic expansion
valve.
Check whether the air
duct is blocked.
Check the condenser.
Check whether the oil
temperature and exhaust
temperature are within a
normal range.
Add the lubricant.
Remove the sheet metal.
Check the circuit breaker
status.
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