Air conditioners are highly vulnerable to various types of malfunctions over the years and many new maintenance staff are often unable to cope with them. The 20 most frequent types of maintenance in this collectionAir conditioner failureFor new hands-on inspection and review。
The highest rate of internal temperature, cortex temperature failure is responsible for system temperature, pressure parameters collection and feedback, as evidenced by temperature inclement, air conditioner controlled temperature disorders and abnormal conditions。
Causes of malfunctions: poor exposure, open roads, short circuits, resistance drift, ageing of sensors; lead line breakers, loose plugs, welding, leaks in circuit boards。
Ii. Refrigerant deficiency
Shortfalls in refrigerants directly contribute to reduced heat exchange efficiency and variations in cold heat effects, which can be determined by a combination of high and low pressure and balanced pressure tests. Typical phenomena are low in- and out-temperature temperatures, unheated exterior vents, overheating compressors, pipe frosts, low system pressure, and prolonged fluoride shortages can exacerbate compressors wear。
Causes of failure: insufficient input from the plant, leakage of systems pipelines, and fluorine leakage from long-term operations。
High pressure protection
The system's high pressure side pressure triggers stoppage protection, and the high heat-spreading conditions of the outdoors during the summer are such that equipment overload is protected。
Reasons for failure: outbound heat dissipation, overloading of refrigerants, plume blockages, malfunctioning of radiators, deterioration or shortage of refrigerated oils, system mixing into air, excessive return temperature, overloading of compressors。
Iv. Indoor aircraft not activated
The interior is not functioning properly, the temperature is not set and the system is not warming properly。
Causes of failure: electrical voltage abnormality, failure of the main control panel, abnormality of temperature sensors damaged signals, system trigger protective shutdown。
V. Deactivation of compressors
The compressor is not working, the whole machine does not have a cold and thermal cycle, and the air conditioner is completely inoperable。
Reasons for failure: external power failure, control panel/circuit anomaly, sensor failure; high-pressure protection, overheating protection locking, compressor body damage。
Vi. Operation sounds
An abnormal mechanical noise, vibrating noise, air current acoustics, influence the experience of use, and early warning signals for components。
Causes of failure: damage to fan blades, electrical failure, internal wear of compressors; loose resonance of piped circuits and the sound of air current impact pipes。
Vii. Indoor leakage
Multi-line internal condensed water cannot be properly discharged, with body seepages and drippings, which can result in chandelier damage and electrically controlled components。
Reasons for failure: drainage congestion, displacement of drains, condensed water spills, drainage pumps。
Internal and external communication failures
Interruption of internal and external aircraft communications, failure of signal connection, frequency anomaly of the aircraft, problems of unstructured operation of the equipment and failure to report failure。
Causes of failure: interconnection of communication lines, disconnections, short circuits, loose ends; failure of internal and external main and drive panels; misalignment of external dialling, conflict of internal address, mismatch of wire control; strong electromagnetic interference on site。
Ix. Electronic expansion valve coil failure
Electronic expansion valves have failed to control the cooling stream, system refrigerant cycles are unbalanced, and cold heat-for-thermal effects are significantly different。
Causes of failure: aging circuits, loose wiring, death of valve core, uncontrolled signal output of the inner plate。
X. Fan failure
Wind velocity abnormalities, reduced wind volume or total non-rotation, wind cycle failure, heat change differentials and higher equipment energy consumption。
Causes of failure: aging and burning of wind engines, damage to foliage; electrical abnormalities, wiring errors, failure of wind panels, poor endpoint contact。
Low pressure protection
The system's low pressure pressure below the threshold triggers stop-over protection to prevent colding of pipes and drying of compressors。
Causes of failure: inadequate refrigerants/spills, filter/evaporation jammers, low internal wind volume; failure of piped arteries, forced cooling at low temperatures, failure of low pressure switches。
Air-conditioning frost and ice
The evaporaters, large areas of the pipes are frozen, windways are blocked and the heat-replacement capacity is completely lost。
Reasons for failure: inadequate filter traffic, low refrigerants, localized blockage of pipes; uncooled sensors, low wind rotation, long-term low temperature and low wind speed。
Xiii. Poor heat production
Winter start-up is slow, the temperature of the wind is low and the capacity to heat is severely inadequate。
Reasons for failure: excess or deficiency of refrigerants, four-barrel card decomposition gas, severe external frosts, failure of frosts; out-of-air dispersed heat sheet congestion, decline in heat-making capacity in low-temperature environments, abnormal temperature control of sensor failure。
Xiv. Frequent departures
Air conditioners are repeatedly activated, cannot operate continuously, temperature failure, power consumption surges and severe loss of compressor life。
Reasons for failure: network voltage fluctuations, high-pressure/overheat protection frequently triggered; sensor failure, master control plate programme disorder, compressor overload, circuit insulation。
Outsiders don't work
The interior is normally ventilated, the exterior wind machine, compressor is completely inactive and the whole machine is free of cold and thermal circulation。
Causes of failure: external power outages, wire loss, communication failure; external main/drive damage, compressor/winder protection locking, pattern error。
That's the way it smells
The wind vents continue to blow aroma, sour, charred, affecting indoor air quality, with some of the aroma in danger of safety。
Reasons for failure: fumigation by filter evaporation, internal damp breeding bacteria, wind stain deterioration; excessive heat burning of circuit boards, and exposure to oily fumes。
Seventeen, four valve failure
The cold-heated mode of air conditioning is not working, and there are problems with cooling, heating, and mode-to-carton switching。
Reasons for failure: four valve wires are burned and wired poorly; valve card tar stains are blocked; valves are gas-coated; no switch signal on the main plate; system pressure abnormality leads to the failure of the switch。
Extortion failure
Unable to automate or impregnate after winter off-site frosts, the accumulation of ice causes heat failure and the crew to shut down。
Causes of failure: damage to the frosting sensor, abnormal master-controlled frosting procedure; failure of the quadrilateral switch, excessive external frosting, failure of the frosting component。
Xix. Air-conditioning leakage
The fuselage, leak protection, which is a high-risk electrical failure, has electrical contact and a fire hazard。
Causes of failure: insulation of circuits, internal inflow of water; insulation of electrical circuits, insular insulation, failure of electrical controls。
Twenty, the air is small
Wind speed to maximum is still weak, cold and heat exchange is extremely inefficient and room temperature is slow。
Reasons for failure: grid-filtration congestion, aging of wind-engine electric units, deterioration of wind-engine electrical capacity, wind-wind break and leak, wind-shield cover, abnormal signal control of main panel wind speed。
