Maintenance work on air conditioners. Maintenance is the key to quality air conditioning

MAINTENANCE No. 1 (TO1), monthly
. Inspection of fastenings, fences and structures of outdoor and indoor units and elimination of defects;
. Inspection of equipment and verification of proper operation of equipment;
. Control panel testing;
. Checking the operation of the air conditioner in all modes;
. Cleaning the input and output blinds of the indoor unit;
. Cleaning the cabinet and front panel of the indoor unit;
. Cleaning the filters of the indoor unit;
. Check of serviceability of the system of indication of modes;
. Checking the health of the drainage system;
. Checking for a layer of frost on the heat exchanger of the indoor unit;
. Check for the presence of freon in the system;
. Dry air temperature control at the inlet of the indoor unit;
. Dry air temperature control at the outlet of the indoor unit;

MAINTENANCE No. 2 (TO2), quarterly
. Performance of work on TO1 (see above);
. Check the tightness of the connections of the passage of the freon;
. Checking the status of power and control circuits;
. Tightening of threaded connections of wires on terminal boxes, if necessary replacement of fuses, lugs, stripping of contacts;
. Diagnostics of air conditioner operability by pressure and temperature;
. Diagnosis and elimination of extraneous noise;
. Checking the operation of the drive output blinds of the internal device.

MAINTENANCE №3 (TO3), semi-annual
. Performance of work on TO1 and TO2 (see above);
. Checking the health of electrical equipment and automation of the capacitor unit;
. Checking the operability of electric motors and fan blades;
. Checking the average suction pressure;
. Checking the operation of the "heating elements" of oil heating in the compressor crankcase;
. Seasonal re-adjustment of air conditioner operating modes or seasonal preservation (de-preservation) of equipment;
. Checking the operation of the compressor emergency shutdown system;
. Checking the condition of thermal insulation of HFC pipelines and troubleshooting;
. Cleaning the heat exchanger and other components of the outdoor unit.

• Warm air blows from the air conditioner
• Freezes the radiator of the indoor unit
• Freezing nuts on the outdoor unit
• Air conditioning weakly cools the room

Service includes:

• Checking the fastenings, serviceability of fences and structures of indoor and outdoor units
• Thermophysical Diagnostics
• Checking for leaks in the refrigerant circuit
• Refrigerant charge if necessary (up to 100 gr.)
• Dry mechanical cleaning of outdoor unit heat exchangers
• Cleaning the filters and heat exchangers of indoor units. Bactericidal treatment
• Cleaning the cabinet and front panel of the indoor unit
• Testing electronic components and functioning in all main operating modes
• Diagnostics of the performance of the control panel
• Check drainage
• Checking the condition of electric wires, contacts and tightening of screws of contact clamps of electrical connections
• Maintenance of mechanical fasteners of the moving parts of the indoor unit, their lubrication
• Explanations for the proper use of refrigeration equipment

How often do air conditioners need to be serviced?

The frequency of service depends on several factors:

• The operating conditions of the air conditioner (how often the air conditioner is used).
• The quality of installation of the air conditioner.
• The conditions of the room in which the air conditioning system is installed (humidity, air pollution, number of people, etc.).

Because most household air conditioners  operated in the warmer months, we recommend that you perform maintenance twice a year:

1. In early spring, when the temperature in the street becomes above zero. This is necessary for diagnosing the condition of the air conditioner before the season and confidence in its performance for the summer.
2. In the fall, after the air conditioner is no longer needed. These are diagnostics after the season, identification of the revealed malfunctions, cleaning and washing of evaporators clogged up during the summer.

Recommended dates for servicing in the most common places of installation and operation of the air conditioner

Based on the operating conditions of the air conditioner described above, we offer different options for comprehensive service. Our experts will be able to choose the best option for you for maintenance and answer all questions.

Prices for standard installation are valid for equipment purchased in our company. The cost of non-standard work and the installation of industrial air conditioning systems is calculated individually.

  Prices for comprehensive service of air conditioners

  Download price list

  Air Conditioning Service Prices

*** Prices for the maintenance of air conditioners for a standard arrangement of equipment (units are located in easily accessible places).
  The cost of non-standard work and maintenance of industrial air conditioning systems is calculated individually.
  The conclusion of the contract for the maintenance of air conditioners installed by a third party is carried out after equipment diagnostics.

  Download price list

  The system of discounts for servicing air conditioners

  Download price list

  Prices for maintenance, repair and design of industrial equipment

June 2017

Air conditioning maintenance work

In the table below, you can see the standard work that is carried out when a service specialist visits for cleaning and preventing the air conditioner.

• Inspection of the split system for the integrity of the body and main components
• Cleaning the heat exchanger of the air conditioner outdoor unit: hydraulic and mechanical
• Disinfection of the surfaces of the indoor unit after cleaning and processing the heat exchanger
• Cleaning guide rails and air conditioning filters
• Checking the operation of the blinds with the operation of the control drive
• Spillage of the drainage system, check for free drainage. If necessary, purge and clean
• Cleaning the fan blades and checking the operation of the electric fan of the split system
• Measurement of starting currents, voltage at the terminals of the electrical circuit
• Pressure measurement in the system: discharge and suction to assess an adequate level of freon. Refueling if necessary (up to 0.5 kg. For air conditioning)
• Starting the system and monitoring the operation of the compressor for the absence of extraneous noise and unacceptable vibrations
• Test run of the air conditioner and run in all operating modes with measuring the temperature difference during operation

After-sales service is a real savings!

The implementation of this list will significantly extend the life of the equipment, it may be possible to eliminate minor defects or deviations from normal indicators  (for example, a simple refueling of freon), which would subsequently lead to the breakdown of all equipment.

And what happens when the air conditioner breaks down? How much does it cost its owner?

• Firstly, you will have to pay for the departure of a technical specialist for initial diagnostics in order to understand what kind of malfunction is involved. Not a single company will send its specialist for free: everyone works for money. You too
• Further, if you are lucky, then the malfunction can be fixed on the spot. If we are talking about minor repairs to the control board, electronics, temperature sensor
• If the malfunction is such that bench diagnostics and removal of units is required - dismantling the air conditioner and transporting it to the technical base
• Then - the order of new spare parts for the air conditioner and often a long wait from the arrival: not all units are always available from distributors in warehouses
• Upon arrival of the parts - restoration of the split system and test launch
• At the final stage, the equipment is transported to the customer, installation, evacuation, and freon refueling. Each item is work, it is materials, which means money

The cost of restoring an air conditioner sometimes exceeds the cost of a new air conditioner. Should I save on the maintenance of the air conditioner? Yes, it is. But wisely: servicing an air conditioner every week is not economically feasible. But to complete the work at least once a year, perhaps, is worth it.

The situation with the need to maintain household split-systems can confuse even a professional. Air conditioning manufacturers, in order to attract the public, argue that it is their air conditioners that do not need to be serviced at all during the entire service life. Installers "impose" the service and reiterate with one voice that this must be done in order to be sure that everything works as it should. As a result, the user of the air conditioner is inclined to trust the manufacturer, writing off the obsessive offers of the installation company at the expense of his excessive desire to sell another service.

The materials made an elementary excursion with the design of a modern air conditioner and its features. Obvious arguments are given for the urgent need to still carry out periodic maintenance of the air conditioner at least once a year.

The concept of maintenance is given, a list of works on the maintenance of air conditioners with an indication of the cost of work is presented.

WHY IT IS NECESSARY TO CARRY OUT PERIODIC SERVICE FOR THE AIR CONDITIONING

Let's try to figure out why regular maintenance is necessary or whether it is necessary at all. Before starting to discuss this interesting problem, dear reader, let's make sure that you and I understand each other’s friend well enough and understand the main functions and principle of operation of the air conditioner.

So, the split system consists of an outdoor and an indoor unit. The outdoor unit contains a heat exchanger with a fan that discharges excess heat into the atmosphere. Also in the outdoor unit is the main unit, the "heart" of the air conditioner is a compressor.

The compressor is designed to create such a pressure that the refrigerant (freon) condenses in the heat exchanger of the outdoor unit. At the exit of this heat exchanger, freon must flow through the pipe, which has completely turned into a liquid state. And the intensity of this process depends on the pressure created by the compressor and the rate of heat exchange with the environment. Then this fluid passes through a special device (flow switch or thermostatic valve), which greatly reduces the pressure in the pipeline. The consequence of this is the rapid boiling of the refrigerant and its intense absorption of heat. The refrigeration circuit is designed so that boiling occurs mainly in the heat exchanger of the indoor unit. At the same time, the air blown through the heat exchanger gives its heat to the boiling freon and leaves the air conditioner chilled. And freon, completely converted to a gaseous state, through the connecting pipe again goes into outdoor unit, gets into the compressor, is compressed, then - into the heat exchanger and so on in a circle, cycle by cycle.

From the foregoing, several conclusions should be drawn.

The first is how indoor unit, both external, blow through themselves huge volumes of air. The outdoor unit deals with atmospheric air with its dust, sulfur, soot, soot from car exhausts, insects and other "joys" of the metropolis. The indoor unit, in turn, deals with odors, fumes of fat from cooking, bacteria, which, as a result of human activity, fall into the air of the room. In this case, both the outdoor and indoor units gradually accumulate the above listed pollution.

When cooling on a heat exchanger, a large amount of moisture from the air necessarily condenses in the indoor unit. This leads to the fact that a large amount of the smallest particles, including those of biological origin, adhere to the wet heat exchanger and fan impeller. After turning off the air conditioner, an ideal environment is formed in the indoor unit for the development of mold spores, fungi and bacterial colonies. In addition to this, the heat exchanger tray, the fan and the heat exchanger itself also become a source of unpleasant musty odor.

At the moment, there are models of air conditioners with antibacterial coating of the evaporator (heat exchanger of the indoor unit) and fan impellers on sale. But practice has shown that often it is this coating that, in turn, becomes a source of unpleasant chemical odors. This occurs either due to poor-quality application, or due to, in general, the chemical nature of this composition.

Part of the dust still passes through the filters and the heat exchanger and falls on the drain pan. From there, dust lumps are gradually washed off into the drainage. Often, dust begins to settle in some part of the drainage pipeline, drying out there, gradually clogging the cross section of the tube. Sooner or later, this will lead either to condensation leakage from the indoor unit, or to unpleasant odors from the drainage.

As for the outdoor unit, a film of soot, soot and dust gradually appears on thin aluminum fins of the heat exchanger, which of course reduces the efficiency of heat exchange with the environment. In some central areas of the city, condenser contamination is particularly fast, and as they say "tightly."

A decrease in the efficiency of heat exchangers cannot but affect the load of not the compressor, as well as other units of the refrigeration system. You should not expect at the same time and full return from the unfortunate device, which in this condition works for wear.

There is another big problem with the outdoor units of air conditioners - poplar fluff. Often, on the first floors of buildings, the outdoor unit at the back, where the air intake is made, is covered with a dense fur coat made of compressed fluff. This air conditioner does not have to live long.

Now, dear reader, you and I began to understand each other a little.

Let’s try again to say the rhetorical question with which our conversation began: why is scheduled maintenance necessary or is it necessary at all?

In my opinion, the answer is obvious. And mind you, I haven’t even said a word about maintenance - checking the refrigerant pressure, the condition of the electrical elements and connections, the performance of the compressor, the compliance of the technical specifications with the nominal, and so on and so forth.

For the listed and other reasons, we strongly recommend servicing regularly operated air conditioners at least once a year. After servicing, unpleasant sounds disappear, all filters and heat exchangers are in perfect condition, the refrigeration unit is serviced, and all potential dangers of leaks or emergency situations are eliminated. Drainage is spilled and blown, the indoor unit is disinfected.

Carry out the service of your equipment, and it will last you a long time. And instead of troubles, it will give you pleasure from use, and also create reliable comfort in your home or at work.

MAINTENANCE * AIR CONDITIONERS

Regular maintenance will maintain the warranty on the equipment, significantly increase the service life and prevent equipment breakdowns in the summer, when air conditioners are used most intensively.

The list of maintenance work * of air conditioners:

Maintenance work:

• external inspection of equipment;
• checking the condition of the filters of the indoor unit;
• control of output (air) flow parameters;
• check the operation of the drainage system;
• verification of operating parameters using the built-in self-diagnosis system.

Work if necessary:

• cleaning the filters of the indoor unit;
• cleaning heat exchangers of indoor and outdoor units;
• cleaning the casing of the indoor unit;
• drainage system cleaning;
• refueling with a refrigerant (the cost of a consumable - a refrigerant, is paid additionally);
• washing the outdoor unit with a high-pressure apparatus (additional charge).

For your convenience, we offer four tariff plans, which include all the work necessary for the smooth operation of air conditioners.

1. One-time service.

The cost of a one-time service of one air conditioner with a capacity of up to 5 kW is 70 cu, taking into account the departure of a specialist. When servicing several air conditioners, the cost of maintenance is calculated as follows: $ 20 departure of the specialist + n · 50 cu where n is the number of serviced air conditioners.

2. "Seasonal"  (service twice a year).

The best solution when servicing air conditioners in an apartment or cottage! In addition, it is suitable for servicing air conditioners in offices. It involves carrying out servicing twice a year, usually in spring and autumn.

The cost of annual maintenance of one air conditioner with a capacity of up to 5 kW is 100 cu, taking into account the cost of visits of specialists.

3. Optimal  (quarterly service).

This tariff plan involves the comprehensive maintenance of air conditioners 4 times a year. This tariff plan is designed to service air conditioners installed in the office or in technical rooms. In addition, regular cleaning is necessary for air conditioners, the outdoor units of which are installed on busy streets or in technological rooms (car service workshops or a factory).

The cost of annual maintenance of one air conditioner with a capacity of up to 5 kW is 200 cu, taking into account the cost of visits of specialists. If the number of air conditioners serviced under the agreement is from 5 to 10 units, the cost of annual maintenance of one air conditioner is 190 cu

Annual service once a quarter involves the signing of a service contract. According to this contract, our service department performs free repair of air conditioners that have failed during the term of the contract. In case of failure of your air conditioner, repair work is free of charge, you pay only for spare parts and consumables. The conclusion of this contract is made after the initial diagnosis of air conditioners.

4. Monthly maintenance.

This tariff plan is designed to service intensively working air conditioners, as a rule, they are installed in technical rooms (server rooms), as well as in rooms in the atmosphere of which suspended particles or volatile substances such as varnishes can be contained (a typical example is beauty salons). In addition, regular cleaning is necessary for air conditioners, the outdoor units of which are installed on busy streets or in technological rooms (car service workshops or a factory).

The cost of annual maintenance of one air conditioner with a capacity of up to 5 kW is 540 cu, taking into account the cost of visits of specialists.

Annual service once a month involves the signing of a service contract. According to this contract, our service department performs free repair of air conditioners that have failed during the term of the contract. In case of failure of your air conditioner, repair work is free of charge, you pay only for spare parts and consumables. The conclusion of this contract is made after the initial diagnosis of air conditioners.

Diagnostics of air conditioners.

Diagnostics of air conditioners allows you to assess the technical condition, identify a malfunction or predict the failure of individual units of the air conditioner. The service specialist provides the Act of primary diagnostics of the system and a list of necessary repairs of equipment in case of malfunctions.

The cost of diagnosing one wall-mounted air conditioner with a power of up to 5 kW is $ 35. The cost of diagnosing one air conditioner of cassette, sub-ceiling or channel type, with a capacity of up to 5 kW - 70 cu When calculating the cost of diagnosing your air conditioners, it is calculated as follows: $ 20 departure of a specialist + n · 35 cu, where n is the number of serviced air conditioners.

The cost of diagnostics and maintenance of air conditioners with a cooling capacity of 5 to 10 kW is calculated with a coefficient of k \u003d 1.5, from 10 to 20 kW with a coefficient of k \u003d 1.8.

The cost of servicing a multi-split system is calculated based on the number of indoor units.

The cost of servicing centralized air conditioning systems is determined based on the type and cooling capacity of the equipment.

Prices are given for servicing standard climate equipment and normal working conditions: air conditioning units are located in easily accessible places, work is carried out during working hours.

When servicing air conditioners using industrial mountaineering for access to outdoor units, the cost of maintenance increases by 50 cu for each unit.

The prices are indicated in cu, including VAT, the calculation is made in rubles at the Central Bank rate of the Russian Federation for US dollars on the day of payment (from the editor: in connection with the fluctuations of the US dollar against the ruble, we think that the company will calculate at an average rate, for example, at the rate of 30 rubles for 1 US dollar).

In conclusion, questions related to the maintenance of air conditioners, we give, for comparison, basic maintenance operations of refrigeration equipment and heat exchangers :

Oil removal;
  - oil regeneration;
  - air removal;
  - moisture removal;
  - ensuring the tightness of the system;
  - replenishment with a refrigerant and a coolant;
  - cooling water treatment;
  - descaling;
  - thawing of cooling devices;
  - corrosion protection;
  - technical inspection of devices.

Literature.

1. Why is it necessary to carry out periodic maintenance of the air conditioner // http://www.skn.ru.
2. Maintenance * of air conditioners. The list of works on the maintenance of air conditioners // http://www.climatsv.ru.
3. Refrigeration units  / Kurylev E.S., Onosovsky V.V., Rumyantsev Yu.D. / 2nd ed. steoreootype. - St. Petersburg: Polytechnic, 2002.p. 510-532.

* Maintenance  - This is a set of technical and organizational measures carried out in the process of operating technical objects in order to ensure the required effectiveness in the performance of their assigned functions.

T.O. subject to all technical objects - both working for its intended purpose, and being in storage, transported, prepared for work after storage or transportation. For modern complex technical objects (such as cars, technological units), uniform rules are established for the so-called, which form the system for the so-called and are reflected in the relevant technical documentation. In the system, i.e. two most important subsystems can be distinguished: prevention and recovery (emergency repair). System structure takes into account the nature and operating conditions of the facility, includes a list of preventive work with an indication of their frequency and composition required for their implementation by specialists, a list of necessary tools, materials, instrumentation, etc. Properly organized so reduces operating costs (by reducing the number of emergencies leading to failures, reducing expensive unscheduled repairs, reducing the cost of scheduled repairs) and helps to increase the resource of the technical facility. // Great Soviet Encyclopedia.