Faults and solutions generated in the operation of fan coil

In actual operation, engineering, fan coil systems often will be some failures, resulting in room air conditioning load decreases, less than the design temperature requirements. Use the fan coil number, dispersed installation, maintenance and repair is not in place will seriously affect their effectiveness. Therefore, the problems and failures in the operation of fan coil produced to be able to accurately determine the cause and to be resolved quickly.

First, the fan does not turn
Reason:
(1) power;
(2) low voltage;
(3) Incorrect wiring or loose terminals;
(4) failure or poor motor capacitor;
(5) switch is defective.
Solution:
(1) identify the reasons for or wait for restoration;
(2) check Cheongju reason, restore normal voltage;
(3) with a multimeter to check wiring and repair;
(4) to repair or replace the motor, capacitor check multimeter after use;
(5) repair or replace the switch.

Second, the fan speed but no wind or less wind
Reason:
(1) power supply voltage is not normal;
(2) reverse;
(3) There was blocked outlet;
(4) wheel anti-loaded;
(5) the air filter clogging.
Solution:
(1) identify the cause and restore the voltage to normal;
(2) changing the wiring or replace the motor;
(3) the removal of obstacles;
(4) the impeller being installed;
(5) Cheongju wash the air filter.

 Supply water chilled 4-way cassette fan coil units

Third, bad cold (hot) wind effect
Reason:
(1) valve opening is not enough;
(2) coil blockage;
(3) coils inside the air;
(4) power supply voltage falls;
(5) A clogged air filter;
(6) for (cold, hot) water shortage or abnormal temperature;
(7) Fan reversal;
(8) delivery, return air obstacles;
(9) airflow short circuit or uneven distribution of indoor air, improper equipment selection;
(10) temperature adjustment inappropriate.
Solution:
(1) Re-adjust the valve opening;
(2) Cheongju sweep discharge tube;
(3) the discharge of air from the bleed valve;
(4) identify the reasons for recovery voltage;
(5) Cheongju washed filters;
(6) regulating the water supply valve, check water temperature, adjust the cold (hot) source;
(7) the removal of obstacles to re-wiring;
(8) the removal of obstacles and adjust the air;
(9) To re-elect fan coil;
(10) to adjust the air quality.

Fourth, there are fan coil vibration and noise
Reason:
(1) fan coil poor installation;
(2) fan coil housing poor installation;
(3) fixing the fan loose parts;
(4) Duct on a foreign body;
(5) the fan motor is faulty;
(6) fan blades damaged;
(7) Outlet grille louvers loose
(8) Fan coil within air
(9) chilled water (hot water) flow rate is too high;
(10) into the water mixed with a large amount of air (air into the water system to form water hammer).
Solution:
(1) in accordance with the relevant standards and specifications, re-installation and adjustment of fan coil;
(2) Re-install the fan coil housing;
(3) identify the reasons for the fastening and adjustment of loose parts;
(4) removal of foreign matter on the way the wind;
(5) Repair or replacement of the motor;
(6) replace the fan impeller;
(7)Tightening or adjusting blinds fan outlet;
(8) to exclude the air within the heat exchanger fan coil;
(9) Check the water flow rate, and will adjust the normal water flow rate;
(10) Remove air in water

Fifth, leaking
Reason:
(1) poor precision air conditioning installation, drain pan tilt;
(2) leaking pipes;
(3) tube and condensate water dripping.
Solution:
(1) adjusted as required;
(2) replacement of water pipes;
(3) condensate water pipe should be re-insulation.

Sixth, the outer casing surface condensation
Reason:
(1) inside the enclosure damaged insulation;
(2) the housing when assembled in contact with the flame, the insulation has been burnt;
(3) fan coil casing seams have cold air leakage;
(4) indoor dew point temperature is too high.
Solution:
(1) repair the insulation inside the cabinet;
(2) the installation, do not make direct contact with the flame chassis repair, insulation will burn re-wrap;
(3) the leakage at the housing repaired;
(4) on the indoor dehumidified.

Seven, the outlet of a foreign body blow
Reason:
(1) due to corrosion caused by the fan blade surface corrosion products;
(2) air filter damaged, deteriorated;
(3) housing insulation material damage, deterioration;
(4) Too much dust in the fan coil.
Solution:
(1) replace the fan;
(2) Replace the air filter;
(3) the replacement of insulation material;
(4) cleaning dust inside the fan coil .

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.

Our workers have years of production experience in fan coil unit,industrial valve,air curtain,air conditioning thermostat,corrugated stainless steel tubing.Mr Ding, our technical manager has eight years of experience in the field of air conditioning and refrigeration.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

We guarantee each product through rigorous testing.Our goal is to provide quality products on a timely basis. We pride ourselves on our ability to offer technical knowledge and advice to our customers as well as product of the highest quality.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc.OEM and minimum orders will be welcome.

Central air conditioner thermostat works

Central air conditioning in the regulation of the room temperature has an advantage over conventional air conditioning , and liked by many users..Central air-conditioning temperature control precision of the secret lies in central air-conditioning's thermostat.Air conditioner temperature controller is to control the air conditioning room temperature electric switchgear.Central air conditioner thermostat consists of both electronic and mechanical, different types of central air conditioning thermostat, works differently.Below we take a look at the different types of central air-conditioning thermostat works.

mechanical thermostat

Mechanical temperature control can be divided into the vapour pressure-temperature, liquid expansion thermostat, gas adsorption heating and expansion of metal type thermostat.Vapor pressure type thermostat which can be divided into gas and liquid gas filling and mixed type.Home air conditioning machines are dominated by this type of thermostat.Let steam pressure thermostat, for example the principle of mechanical thermostats.


Experts pointed out that when vapor pressure type thermostat bellows action effect in spring, spring tension is controlled by a knob on the Control Panel, capillary in air conditioning indoor air inhaled air inlet, return air temperature to react in indoor cycling.When room temperature rose to adjustable set of temperature , capillary and corrugated tube in the of sense temperature agent gas expansion, makes corrugated tube elongation and overcome spring of stretch put switch touch points connected, at compressor running, System refrigeration, until at room temperature and fell to set of temperature, sense temperature package gas contraction, corrugated tube contraction and spring with action, will switch placed disconnect location, makes compressor of motor circuit cut.This repeated action, so as to achieve the purpose of controlling the room temperature.

large LCD digital thermostat

electronic thermostat

Electronically divided into resistive heating and thermocouple thermostat.Here we have a resistance temperature controller as an analysis of the working principle of electronic thermostat.

Electronic temperature controller (resistive) is by means of electric resistance method of temperature measured by commonly used Platinum wire, copper, tungsten, and semiconductors (thermistor) temperature resistance, the resistance has its advantages and disadvantages.Home air conditioning sensor based thermistors.Therefore, in form when the thermostat, can be changed easily by selecting the appropriate thermistor temperature and working temperature.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in climate technology.Which it has expanded over the years to a wide spectrum of products and services for air conditioning,treatment and ventilation,as well as heating systems for both industrial and domestics sectors.

Brightbest own the wide products include fan coil unit,brass ball valve,corrugated tube ,air conditioning thermostat and air curtains manufacturers.

Brightbest is provided with quality certification according to ISO9001:2000 and ISO14001:2004 and is strongly committed to customer satisfaction.

Brightbest is commited to a point of reference for energy saving and environmental protection technologies in the frame of international directives.

Central air conditioning condenser cleaning procedures and precautions

Central air conditioning condenser can easily scale, the normal cooling in the summer of treatment should be done daily, otherwise it runs in an environment of high hardness, dissolved in water in the circulating water system inorganic salt will crystallize as the temperature rises precipitated the formation of scale on the wall of the condenser heat transfer surface, resulting in reduced heat exchange efficiency. At the same time hard scale is increased, the increase in energy consumption will increase when the hard knot scale 1mm thick 6 to 10. As the water soil, sediment, soil humus formation, with bacteria, algae and other microorganisms and the formation of secretions biological slime, will be attached to the condenser heat transfer tubes formed on the walls dirt, causing severe pipeline clogging; and dirt, slime will affect the heat exchange efficiency, more power can cause high voltage operation, causing severe overpressure shutdown . All this has seriously affected the normal operation of the condenser. Condenser cleaning is divided into physical cleaning and chemical cleaning, general physical cleaning with high pressure water jet condenser brass dirt cleaned out; if scaling a hard scale, should be carried out chemical cleaning, the scale can not be physically removed.

In order to optimize the condenser run in the state, it must condenser specialized chemical drug treatment, removal of scale, rust, slime, antiseptic and anti-corrosion treatment, reduced to clean metal surfaces.

Operating procedures:
(1) Close the valve out of the water, open the drain valve, check valve is closed and out of the case.
(2) Open the condenser cover, take a little scale on the brass surface with descaling agent do different concentration ratio of cleaning tests.
(3) The method by low prices, connected properly cleaning pump.

(4) the use of an external pump, to the bucket filled with water, start the cleaning pump cycle to smooth water.
(5) several times to slow the bucket plus YX-22 detergents. After repeated washing with tap water cycle to PH value to about 7.
(6) rinsed with tap water cleaning pump.
(7) Open the cover using Yaxin automatic machine guns pass through gun.

First, the physical cleaning

1.1 host physical gun suitable for water walking through the sediment and rust clogging the tube more serious equipment, such as a severe blockage before chemical cleaning equipment must first pass a physical gun.
1.2 Close out of the water valve, open the drain valve, check valve is closed out, the water will drain and clean the heat exchanger.
1.3 Opening the need to clean up parts of the cap, taking pictures, taking dirt samples for analysis.
1.4 The use of brass Yaxin through automatic machine guns, water cannons, and other tools to clear the rod clean.
1.5 Water indoor dirt floor clean, anti-rust paint brush, paint dry, take pictures.
1.6 test standard brass without clogging silt cleaning rate of 95%
1.7 open site restoration, pressure test watertight.

Second, chemical cleaning
The method uses a single professional cleaning cycle, using efficient detergents for Copper Tube ten times lower than that of an inorganic acid, based on the effective protection of equipment on the fast cleaning, descaling. After washing of brass pre-film treatment, can greatly slow down the corrosion rate of the device.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in climate technology.Which it has expanded over the years to a wide spectrum of products and services for air conditioning,treatment and ventilation,as well as heating systems for both industrial and domestics sectors.

Brightbest own the wide products include fan coil unit,brass ball valve,corrugated tube ,air conditioning thermostat and air curtains manufacturers.

Brightbest is provided with quality certification according to ISO9001:2000 and ISO14001:2004 and is strongly committed to customer satisfaction.

Brightbest is commited to a point of reference for energy saving and environmental protection technologies in the frame of international directives.