Service And Troubleshooting - Haier HC18D1VAR Service Manual

NEVER USE A WEATHER COVER OVER THE OUTDOOR UNIT. The unit is designed to operate
outdoors. A cover traps moisture in the unit causing rust and corrosion .There is the added danger of
starting the system with the cover on. This prevent air flow through the outdoor coil causing dangerous
system pressure .Compressor damage may result.

9. SERVICE AND TROUBLESHOOTING

WARNING THE ABILITY TO PROPERLY PERFORM SERVICE ON THIS EQUIPMENT REQUIRES
EXPERIENCE MECHANICAL SKILLS, TOOLS AND TEST EQUIPMENT .IF YOU ARE NOT QUALIFIED,
DO NOT ATTEMPT TO PERFORM ANY SERVICE ON THIS EQUIPMENT, CONSULT THE USER'S
MANUAL FOR ROOTING MAINTENANCE THAT CAN BE DONE BY THE HOME OWNER.
FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THE
EQUIPMENT, SERIOUS PERSONAL INJURY, OR DEATH.
The HVAC industry, had improved the efficiency of the products offered to consumers. New and
more sophisticated mechanical and electronic features for achieving higher efficiencies have been
designed. The use of test equipment is now more critical than ever.
In the servicing and troubleshooting section is information on compressors and other components and
their test procedures. There are troubleshooting charts, charging charts, wiring diagrams and service
guide charts. Included is list of suggested test equipment.
This information can be uesed by the service technician to understand the installation and troubleshooting
and operation of the current familie of air conditioning. The procedures in this section are generic in content.
Each product family incorporates some of these components. Be aware of this is a guide compiled from
numerous sources. It can not take into consideration all conditions found in all installations.
Note: Upon arrival at the job site, a sound first step is a review of the system installation to identify any
obvioss problems, this Installation Manual should be used as a guide.
REFRIGERANT RECOVERY
Refrigerant systems using chlorofluorocarbon (CFC) and Hydrochlorofluorocarbon (HCFC) refrigerants
system are subject regulation by the clean air Act of 1990. This act prohibits the unrestricted release
of refrigerant into the air. Proper charging of refrigerant system may require removing some
refrigerant when the system is overcharged. and is to be used by personnel with appropriate industry
experience recover the excess refrigerant.
Recovery means to collect the refrigerant in a special holding container. Recycling means to run the
refrigerant through a filtering system to remove most particles and moisture. Reclaiming means to
chemically reprocess the refrigerant to return it to its original purity.
Recovering and recycling refrigerant is possible with the aid of mechanical devices made for the
purpose .The recovery system is a compressor / pump assembly, which removes refrigerant from a
system and safely stores it in a Department of Transportation (DOT) approved container until it is
re-used or returned for reclaim.
The authors of the EPA regulations enforcing the Clean Air Act realized that an accidental release of the
refrigerant may happen in the course of normal service.
Always use procedures so as not to release any refrigeran.
When performing service on a refrigerant system, charging should be done using the best service
practices, ensuing that the least amount of refrigerant needed is used.
Lines must be evacuated before charging with refrigerant.
WARNING : IN ORDER TO COMPLAY WITH FEDERAL LAW, ALWAYS USE A RECOVERY /
RECYCLINE DEVICE WHEN DOING REFRIGERANT SERVICE.
TEST EQUIPMENT
The following test equipment is recommended to properly service air conditioning equipment:
1. A good quality volt/ohm meter;
2. A two-channel temperature electronic thermometer;
3. A Magnetic Gauge (capable of reading to 3" W.C.)
4. A refrigerant pressure Gauge manifold set;
5. A clamp-on ammeter.
22
Central Air Conditioner
Model: Cooling Only, 13SEER units