KStar FocusAir ESM022, Руководство пользователя

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66 Chapter 6 Operation and Maintenance
Foc u sA ir I n - ro w Ai r Con d iti on e r U s er ´s M an u a l
2. Clean the condenser fins;
3. Confirm that the air inlet and outlet of the condenser are smooth.
Fan
Check the fan at least every six months as follows:
1. Ensure that the junction box is not damaged or loose;
2. Ensure that there is no deformation, damage or interference in the fan grille and wind deflector;
3. Ensure that the fan has no abnormal noise, abnormal vibration, blade jamming, etc.
6.9.5 Replacement of compressor
Warning
When replacing the compressor, avoid skin contact with refrigerant and lubricating oil, or else it can cause severe
burns or frostbite to the skin. Wear long-sleeved gloves when handling contaminated parts.
FocusAir series air conditioners use DC inverter compressors with high reliability. If the construction strictly
follows the correct procedures, the probability of failure during operation is very low.
Compressor motor is rarely burned out due to insulation failure. In the event that the motor is actually burned out,
it is often caused by poor mechanical or lubrication, i.e. overheating.
If the problems that may cause compressor failure can be detected and corrected early, most compressor failures
can be avoided. Maintenance personnel shall regularly conduct maintenance and inspections for possible abnormal
operation. Instead of replacing the compressor after a failure, it is better to take the necessary steps to ensure the
normal operation of the system. This is not only easier but also much cheaper.
When diagnosing the compressor, check whether all the electrical components of the compressor are operating
normally:
1. Check all fuses and circuit breakers;
2. Check the conditions of high and low pressure protection;
3. If the compressor fails, find out whether the failure is caused by an electrical failure or a mechanical failure.
Mechanical failure
Mechanical failure of the compressor can’t be judged by smelling the burning smell. Try to rotate the motor. If a
mechanical failure is confirmed, the compressor must be replaced. If the motor burns out, correct the factors that
caused the motor burn out and clean the system. It should be noted that the burning of the compressor motor is
usually caused by improper cleaning of the system.
Electrical failure
Electrical failure can be judged by the obvious pungent smell. If severe burn occurs, the lubricating oil will turn black and
become acidic. In the event of electrical faults and refrigeration compressor motor completely burned out, measures must be