AUX air conditioner service manual
210
Case 19 Water entered the system in installation
Unit Model：ASW-H12A4/H
Phenomena：Air conditioner could be turned on but couldn’t produce cool air
Cause Analysis: run air conditioner for 10 minutes, it could cool normally, pressure and current was
normal; air conditioner continued to run, low pressure decreased gradually, current also decreased, and
cooling efficiency became unsatisfactory, so we presumed water entered system when air conditioner
was installed. Because the air conditioner passed quality check when it left the factory, and according
to the client, air conditioner was installed in rainy day, so water might entered the system.
Solution: released refrigerant, vacuum the system and added refrigerant again, air conditioner worked
normally since then.
Experience Conclusion: in most case, these kinds of faults were caused during installation or
maintenance; maintenance workers shall investigate, check and touch air conditioner to find out the
cause of faults.
Case 20 Failed to evacuate air in the system fully during installation
Unit Model ：ASW-18A4/TB
Phenomena： Tripped frequently
Cause Analysis: generally, in summer air conditioner may have problem in heat discharge and voltage.
But this air conditioner had been installed for only one month odd. It was installed on the roof, so heat
exchange efficiency was not so good, but it shouldn’t trip so frequently. We checked the system,
pressure was not so stable, and compressor was overheating, and presumed that air was not evacuated
when the worker installed the air conditioner.
Solution: released refrigerant, because air is lighter than refrigerant, we found there’s air in the
refrigerant obviously. We filled the equipment with refrigerant, air conditioner worked well since then
and it didn’t trip any more.
Experience Conclusion: for air conditioner, installation is more important than manufacture, so
installation workers shall follow installation procedure as they install air conditioners, installation and
wind direction shall be considered. If newly installed air conditioner has problem, they should check
other reason, and then consider possible faults of air conditioner from the simple to the complicated
until fundamental reason is found.
To Next Page
Loading...
Need help?
General
