Huawei NetCol5000-A035 - 6.5.4 Replacing the High Pressure Switch

Symptom Possible Cause Solution
An outdoor fan fails. Check whether the
outdoor fan works.
Refrigerant is
insucient.
Increase the amount of
refrigerant lled.
The compressor exhaust
temperature is too low.
The outdoor fan speed
controller fails.
Replace the speed
controller.
Refrigerant is leaking. Check the pipeline for
any leakage.
The compressor suction
temperature is too low
or liquid returns.
The refrigerant lled is
insucient.
Add the refrigerant.
The indoor temperature
is too low.
Change the temperature
setting.
Filters are clogged with
dirt.
Replace the lters.
The superheat degree
that is set with the
thermostatic expansion
valve is inappropriate.
Adjust the thermostatic
expansion valve to an
optimal degree.
The sensing bulb is
disconnected from the
thermostatic expansion
valve.
Check whether the
thermometer bulb is
disconnected from the
thermostatic expansion
valve.
The external excess
pressure is too high, and
air decreases.
Check whether the air
duct is blocked.
The condensing pressure
is too low.
Check the condenser.
Compressor generate
excessive noises.
Liquid returns in a
compressor.
Check whether the oil
temperature and exhaust
temperature are within a
normal range.
The lubricant is
insucient.
Add the lubricant.
The transport sheet
metal is not removed
from a compressor.
Remove the sheet metal.
An indoor fan fails to
start.
Either the main circuit
breaker or the indoor fan
circuit breaker is not
switched on.
Check the circuit breaker
status.
NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width) 6 System Operation and Maintenance
Issue 17 (2020-10-22) Copyright © Huawei Technologies Co., Ltd. 200