To ensure the normal and uninterrupted operation of the refrigeration unit, timely scheduled maintenance is required, in accordance with the operating instructions and following all the instructions set forth in it.

Precautions for the service and operation of the refrigeration machine, chiller (water cooler)

The following is a list of measures and requirements that must be met by personnel for service and operation of chillers and refrigerating machines.

Be sure to read the instruction manual before beginning installation, start-up and maintenance of the chiller.

Maintenance, centrals, chillers (water coolers) should be carried out only by qualified and having all required approvals workers.

All manipulations related to routine maintenance are allowed only when the machine is de-energized. The only exceptions are those works that are intended to be carried out with the cooler running.

• In the periods established by the instruction, carry out scheduled inspections of the cooler;
• Be careful not to touch the discharge line with unprotected parts of the body, in order to avoid thermal burns. The temperature on the cooler discharge line can reach 120 degrees;
• If a cooler malfunction occurs, determine the cause of the malfunction. Do not start the installation in operating mode until it is fixed;
• If there is a leak of refrigerant or coolant, de-energize the refrigeration unit using the main machine;
• Do not reconfigure system elements automatic protection cooler, without obtaining approval from the manufacturer;
• Control the crimp density electrical contacts inside the control panel, pull the power contacts and contacts at intervals, according to the instructions;
• If the surface of the heat exchanger is contaminated due to mineral deposits, only cleaning agents specially designed for this purpose should be used;
• If the refrigerant leak occurred due to damage to the pipeline and cannot be eliminated if freon is present in the system, then proceed as follows:

1. Collect maximum amount in the receiver, by shutting off its supply from it;
2. Release the remaining refrigerant into an empty cylinder;
3. Evacuate the system according to the power of the vacuum pump and the volume of the refrigeration circuit, but not less than two hours;
4. Solder the damaged area;
5. Pressurize the evacuated refrigeration circuit with an inert gas (!) - 25 kg / cm2, for example, nitrogen. Do not use oxygen, explosive (!);
6. Use soapy water to check the soldered area for leaks;
7. Blow off nitrogen, evacuate again;
8. By opening the solenoid, start freon into the refrigeration circuit, top up if necessary

• If the chiller (water cooler) is equipped with a plate evaporator, then a water filter must be included in the package of the hydraulic module. It is necessary to find out the frequency and degree of its contamination and clean it. But at least once a month
• Before starting work, adjust the automatic bypass valve in the supply line, if any.
• Check the oil level in the compressor at intervals specified in the operating instructions. If the oil level is below normal (usually half the sight glass is normal), then the refrigeration circuit of the unit should be inspected for oil leaks.
• When operating the chiller (water cooler) at a negative temperature environment, do not use water as a coolant (!). The refrigerant circuit must be filled with the appropriate concentration based on the ambient temperature

When operating the refrigeration unit at sub-zero temperatures, the following measures must be taken:

1. Install a compressor crankcase heater to prevent thickening of the lubricating oil when the refrigeration compressor is stopped
2. Install a heater for heating a liquid freon receiver to maintain high pressure, when the refrigeration unit stops
3. Install a differential valve on the discharge side of the condenser and receiver to raise the pressure to the working
4. Install an automatic time relay to delay the operation of an alarm low pressure until the compressor pressurizes the refrigeration circuit
5. When the chiller (water cooler) is operating at a negative temperature, it is necessary to charge the system with the required concentration, in accordance with the required final temperature of the coolant at the outlet of the cooler

• It is FORBIDDEN to set the response temperature on the control processor below +6°C when using the plate heat exchanger and water at the same time. This will entail the inevitable rupture of the heat exchanger plates and the failure of the entire installation and, as a result, the breakdown of the chiller (water cooler) and the need for its non-warranty repair

• Before turning on the chiller (water cooler) for the first time, the shield must be grounded (!)

• A carbon dioxide fire extinguisher must be located near the unit, in accordance with fire safety regulations.

• Before starting the unit, make sure that there are no tools left in the unit used during installation and adjustment, as well as other foreign objects.

• Avoid the impact of mechanical loads on the freon circuit of the chiller (water cooler) under pressure

• If the condenser of the refrigeration machine is in the room, it is necessary to provide exhaust ventilation or ventilation of the room for better heat removal, otherwise the refrigeration unit may stop due to a high pressure alarm.

• Checking the operability of the pressure switch (RD) of emergency and responding condenser fans. It is carried out by forced action on the relay foot in the direction of emergency operation. The unit should stop and the indicator lamp corresponding to the alarm should light up. Reset by the fault reset button. If it's a fan relay, then the fan should start spinning.

• Checking the operability of the fluid circulation control relay.

• It is checked by turning off the pump when the refrigeration circuit of the chiller (water cooler) is turned on. The cooler should automatically turn off. The indicator lamp corresponding to the alarm should light up. Then turn on the pump. should automatically turn on again and the red light will turn off

• To replace broken parts of the chiller (water cooler) and components that are not subject to repair, it is allowed to use only the same parts and components specified in the specification for replacement. technical passport refrigeration plant. If exactly the same parts and accessories are not available, then it is possible to replace them with equivalent analogues, only after consultation and permission from the technical service of the manufacturer.

If you comply with all of the above rules on service and operation of chillers and refrigerating machines, then you minimize the possibility of emergency and traumatic situations.

Chiller Maintenance

Chiller maintenance

Refrigeration machine (chiller) is a technically complex device on which the entire operation of the air conditioning system depends, requires proper operation and maintenance.

Timely and regular maintenance of the chiller is the key to long and trouble-free operation of it and the entire air conditioning system. Chiller maintenance cost cannot be high. it belongs to the class of devices that do not require large expenditures, but the repair of refrigeration machines can cost you a pretty penny.

Service will help reduce wear on all components of the unit, as well as prevent premature breakdowns. Maintenance of chillers is more economical than repair.

Repair is a set of works carried out with the aim of restoring the operability of equipment lost as a result of failure, damage, wear or exhaustion of a resource.

In most cases, the reason for the repair, as a rule, is the premature failure of the unit associated with non-compliance with the operating rules and the lack of regular maintenance and service. Proper installation, operation and timely service maintenance chillers guarantee longer life of the unit.

Maintenance work must be carried out by authorized specialists in compliance with all safety measures provided for by the equipment manufacturer's instructions. In case of non-compliance with the instructions given in the documentation, the manufacturer is not responsible for the safe operation of the unit and disclaims warranty service obligations.

Chiller maintenance involves the performance of certain works, the period of which is calculated in months or years since the start-up, as well as in the operating hours of the unit. Of the two terms of service maintenance, choose the earliest, the number of hours worked by the unit can be found in the corresponding menu of the controller.

The list of routine maintenance is given in the instructions for maintenance refrigeration machine. Also, authorized specialists must keep a log in which it is necessary to enter information about the work performed, including repairs and unscheduled maintenance.

Routine maintenance work on the chiller should be carried out regularly at the intervals specified in the documentation. In case of non-compliance with the instructions given in the documentation, the manufacturer is not responsible for the safe operation of the unit and disclaims obligations for warranty maintenance of the refrigeration machine.

Chiller maintenance involves the performance of certain work, the period of which is calculated in months or years since the start-up, as well as in the operating hours of the unit. Of the two terms, the earlier one is chosen, the number of hours worked by the unit can be found in the corresponding menu of the controller.

Chiller service includes the following:

1. • Checking for alarm messages in the corresponding menu of the controller.
   • Visual inspection of the system for leaks
   • Checking and cleaning outlets
   • Checking the condition of the water circuit filters
   • De-airing the water circuit
   • Checking the condition and cleaning of air-cooled condensers
   • Pressure Vessel Testing
   • Examination general condition unit
2. Qualified engineer at the beginning and end of the season:
   • Air flow test
   • Checking the water flow through the condenser
   • Checking the tightness of the refrigerant circuit
   • Checking tightness of electrical connections
   • Checking the tightness of the refrigerant circuit connections
   • Checking the condition of the fan bearings and the electric motor
   • Checking the operating parameters of the refrigeration circuits
   • Checking the parameters of the power supply network, current consumption, grounding
   • Checking the oil level
   • Checking the condition of thermal insulation of pipelines
3. Qualified operator at the beginning and end of the season:
   • Oil change every 15,000 hours of operation or every three years
   • Checking the oil level (if equipped with an indicator) at the beginning of the season or once a year
   • Checking vibration and noise levels at the beginning of the season or once a year
   • Checking control and protection devices at the beginning of the season or once a year
   • Motor insulation check at the beginning of the season or once a year

When carrying out maintenance work on the chiller it is very important to prevent the formation of rust on the surface high-pressure vessels (evaporators, condensers, heat exchangers, liquid receivers) and deformation of their body, for this it is necessary to paint high-pressure vessels or apply an anti-corrosion coating on them if corrosion is detected.

Accumulation of dirt on pipes and fins of heat exchangers is unacceptable this leads to an increase in the condensing pressure, which in turn leads to an increase in energy consumption and accelerates the wear of the compressors, which can cause an unplanned shutdown of the unit. The fins and surface of the tubes of the heat exchangers should be thoroughly rinsed with a jet of water during maintenance work on the chiller, and should be cleaned more frequently during leaf fall or lint and pollen dispersion.

For chillers equipped with radial fans, the tension of the belt drive must be checked and if the belt is loose, its tension should be increased to the proper value. Too little belt tension can cause slippage and damage to the drive. On the other hand, too much belt tension can lead to premature bearing wear.

Remember that timely Scheduled chiller maintenance prevents premature chiller failure, thereby saving your money on repairs, since chiller repairs are very expensive.

What to do if the chiller breaks down?

Malfunctions are caused by incorrect operation or mechanical damage. Other causes of failure include temperature fluctuations, power outages, and unauthorized changes to the device's automation settings.

Regardless of the cause of the breakdown, the repair of chillers should only be trusted by professionals. Don't skimp on repairs by trying to fix it yourself or with the help of "jacks of all trades"! Repair after incompetent intervention can entail much higher costs than if you immediately turned to specialists.

Sometimes the repair of chillers is very time-consuming and more than one specialist is needed to complete it. Ordering new parts takes a long time. And setting up a controller for uncommon brands is a task for a real pro.

All-climate specialists perform the full range of services for service, maintenance and repair of chillers of any complexity. Our specialists have proven themselves in the engineering services market. We are trusted by many large companies, the experience of our specialists allows us to perform all work efficiently and quickly. For all services provided, the All-climate company gives a guarantee, which is supported in our service center.

I. SAFETY.

Please read carefully before operating the equipment chiller manual, which contains very important information about the placement, about chiller installation, about the conditions for the use of chillers and about the care of the water-cooling installation.

Since the chiller manual is a source of information about the conscious and safe operation water chiller, it should be kept in without fail.

The manufacturer is not responsible in case of non-observance by users of the installation of the information provided below:

1. When cleaning the chiller, never use steam cleaners, as exposure to steam on the electrical parts of the chiller may cause a short circuit or electric shock.
2. Do not use electrical appliances when working inside the chiller.
3. The electrical safety of the chiller is guaranteed if the plant grounding system meets the required standards.
4. When cleaning or maintaining the chiller, disconnect it from the mains by turning off the main switch or pulling out the plug. When removing the plug, do not pull on the cord.
5. Repairs to the device must only be carried out by qualified personnel. Repair work by unqualified persons is very dangerous.
6. Do not damage parts of the device through which refrigerant gas circulates. Gas released as a result of bent, broken or ruptured gas circulation tubes can cause skin irritation and eye damage.
7. Do not cover or obstruct the ventilation parts of the device.
8. Never use the device as a support or stand.
9. During periods when the unit is idle, if the ambient temperature drops below 0 C, there is a possibility of freezing of the water in the unit. In this case, if the water cooler will not be used for a long time, antifreeze should be added to the water in the system or drained.
10. Damage caused by care and repair by incompetent personnel is not covered by the warranty.

II. GENERAL FORM

The operating manual has been prepared in accordance with the Directive 98/37/EC of the European Union and the standard EN 60204-1, 1997 for the purpose of using a machine manufactured according to the latest technologies, with maximum security and maximum performance.

The instruction manual has been prepared to ensure safe and effective use device manufactured using new technologies in accordance with the standards set in Turkey.

The service life of the device is set by the Ministry of Industry at 10 years.

complete water-cooling plant used for plastic making and forming machines, soles, metal products, for extruders, in textile and chemical industries, dairy plants, any industrial and production complexes where cold water is required, as well as in air conditioning systems.

Devices are manufactured with different capacities - 18 different types, with a capacity of 3.000 kcal / h. up to 320.000 kcal/h.

Installation of all system units is carried out on a durable and corrosion-resistant frame in compliance with the necessary safety measures. After installation, all pressure parts are tested for tightness.

During the production of the equipment, the necessary precautions were taken to protect the equipment from external influences (corrosion, shock, pressure).

III. TRANSPORTATION AND STORAGE OF EQUIPMENT

Lifting and transportation.

Due to the fact that the equipment has a large mass, lifting and moving it must be carried out using a winch or hoist. There are no special considerations for transporting equipment using a hoist, just make sure that the equipment is well balanced on the hoist pins.

When transporting the equipment using a winch, tie the lower beam of the equipment with a belt of adequate strength, and then hook it in the center of gravity.

Storage

If water cooler will be inoperative for a long time, before that, some operations should be carried out.

The incoming electricity must be turned off, the power cable must be disconnected. The water in the cooling system must be drained through the valve.

Cover the equipment to protect it from dust and dirt.

Do not place any load on the unit.

Equipment should not be stored upside down.

IV. POSITIONING AND INSTALLATION

Location selection

The main aspect for the equipment is the place where it will be placed. The place where the equipment will be placed should be cool, well ventilated, away from heat sources and not exposed to direct sunlight.

If the equipment is located in a hot, poorly ventilated place, then the excess hot air coming from the equipment must be disposed of using a special air duct. Otherwise, the equipment, as a result of a greater load, will consume excess electricity. Therefore, carrying out this procedure will be useful for you.

In case you are faced with the need to build an air duct, it is recommended to place the equipment in a place closest to external environment, in order to minimize the distance for the ejection of hot air.

It is advisable to use a separate room for the installation of chillers. Choose a site for installing the chiller, taking into account its dimensions and weight. It is not allowed to install the chiller in unheated rooms and rooms where the temperature can drop below + 5°C.
- The room should be easily accessible and well lit.
- For the possibility of maintenance and repair, it is necessary to ensure a minimum distance between the equipment of 1.5 meters and at least 1 meter to the protruding parts of the walls.

Ventilation Requirements

1. According to the operating temperature of the chiller, choose a room where the temperature will be maintained between +5°C and +30°C. Adequate ventilation of the room must be ensured. Room temperature below +5°C is unacceptable for operation and storage of the chiller.

2. In case of insufficient ventilation, it is necessary to mount a casing to remove hot air to the outside. Avoid recirculation of cooling air. To do this, it is preferable to make the air intake and outlet on opposite sides of the room.

3. When manufacturing the hot air outlet casing, please note that its section must be at least the area of ​​the outlet section on the chiller. The length of such a casing should not exceed 4 meters and have no more than one turn. Longer lengths and more turns of the shroud create more resistance to airflow and result in insufficient cooling.

4. If it is not possible to manufacture casings, an exhaust fan of the same capacity as the chiller condenser fan should be installed in close proximity to the hot air outlet of the chiller.

5. The cross section for the passage of clean air should be 1.5 -2 times larger than the inlet section on the chiller.

6. Protect the room from explosive and corrosive gases.

Electrical connection.

The equipment runs on AC electric current, the voltage of which is 400 V, and the frequency of which is 50 Hz.

The input terminals located on the control panel must be connected to an electrical cable of the type indicated on the plate located on the inside of the panel, and the connection must be made in accordance with EN 60204-1. Before supplying power to the unit, it is necessary to protect the power supply line with a fuse of the capacity indicated on the panel plate.

The connection of the electrical cable and fuses must only be carried out by responsible personnel.

Before installation, a ground line must be carried out and connected to the indicated terminals.

Water connection

Depending on the type of equipment, water pipes of different diameters inside the equipment should be extended with pipes of the same diameter outside the equipment and connected to your system.

In order to ensure the water supply of the equipment, it is necessary to bring a pipe with a diameter to the place marked "power supply", on the back of the unit, and provide it with a valve.

V. FUNCTIONS OF LAMPS, BUTTONS AND SWITCHES ON THE EQUIPMENT

Control Panel

a) Water pump switch.
Used to turn on/off the water pump. To operate the cooling system, the water pump must be running and circulating water through the system.

b) Compressor switch.
Used to activate and deactivate the cooling system functions.

c) Thermostat switch.
Used to adjust the temperature of the cold water tank. Multifunctional sensor, shows the current temperature if no button is pressed and no alarm is given. In order to set the desired temperature, read the information on using the thermostat given in the app.

Functions of indicator lamps

1) Condenser fan in action.
Indicates that the fan motors are running.

2) Blown thermal fuse of the condenser fan.
This signal is used in cooling groups with large capacity. If the fans used in the cooling group operate at 400 V, they are protected against sudden voltage drops and phase failure by a thermal relay located on the electrical panel. If this signal lights up, you should press the reset button for the thermal relay of the fan located on the electrical panel.

3) The crankcase heater in action.
During heating of the compressor crankcase, this signal lights up. This time is the compressor stop period.

4) Frost thermostat warning light.
The reduced water temperature is a period of interruption of work. If the water temperature drops below the adjusted temperature, this will result in the shutdown of the entire cooling system. After the water temperature reaches the required level, the cooling system will start automatically.

5) Water flow signal.
If there is no water flow in the heat exchanger or the flow has decreased, the cooling system switches off automatically. This means that the system is clogged or the water pump is pumping air.

6) Thermal malfunction of the water pump.
Designed to prevent damage to the electric motor of the water pump, which can cause sudden voltage drops and the absence of one of the phases. If this signal lights up, press the reset button for the water pump thermal relay.

7) Water pump in action.
After the water pump fuse is turned on, the water pump starts to work. This signal means its work.

8) The thermostat is set to automatic mode.
The cooling system switches off automatically after it reaches the temperature set on the thermostat. Until the system starts up again, this signal stays on, which means that the system has reached the desired temperature.

9) Phase loss signal.
This equipment operates on electricity, voltage 380 V and a frequency of 50 Hz, in case of sudden voltage drops (over 10%) or in the absence of one of the phases, the cooling system is turned off automatically using the phase failure relay located on the electrical panel. After the reason for stopping the work is eliminated, the system starts working automatically.

10) High low pressure signal.
Indicates that the gas pipes or condensers are clogged, there is a refrigerant leak, the temperature of the working environment of the system has risen above the permissible level, and the system has automatically turned off.

11) Thermistor signal.
This alarm comes on if a thermal thermistor in the engine compartment of the compressor has interrupted the motor. The thermal thermistor is designed to protect the motor winding from overheating in case of prolonged operation of the motor. In this case, wait until the motor has cooled down.

12) Oil pressure pressure switch signal.
This signal is used in cooling groups type GRS 1505 and above. In the event that the compressor is not lubricated or the oil level falls below the allowable level, the system stops automatically. In this case, please contact the manufacturer.

13) Thermal compressor failure.
In order to protect the compressor motor from voltage drops and phase failure, this thermal relay is installed on the electrical panel as an additional protection. In the cases described above, this relay interrupts the electrical circuit. In order for the system to work, it is necessary to press the reset button located on the thermal relay.

14) Compressor in action.
Some time after the compressor fuse is turned on, the refrigeration system is activated and this signal means that the refrigeration system is working.

VI. EXPLOITATION

Before starting operation

Check that the water tank is filled to the correct level.
- Check equipment grounding.
- Make sure that the fuse located before installation on the power cable and the fuses on the electrical panel are switched on.
- Make sure that all three phases are connected to the terminals on the electrical panel. Remember that when connecting electricity to the cooling group for the first time, or after a long period of non-use of the equipment, you must wait at least 8 hours.
- Check thermostat settings.

Equipment operation

Switch on the circulation pump several times at short intervals. Make sure the motor rotates in the indicated direction. Otherwise, swap the two power wires connected to the terminals on the electrical panel.

After the water pump begins to rotate in the required direction, it will pump water to the cooled body, which will lead to a decrease in the water level in the tank. If the water level falls below half, turn off the motor and do not turn it on until the water is replenished. This procedure can be repeated 1-2 times.

If the pump is not pumping water into the system, open the air bleed valve located on top of the pump and bleed the air from the system.

Once you have verified that the water is circulating normally in the system, turn the compressor switch on. The equipment will start cooling.

In the event that any of the fuses will shut down the system, investigate the cause before bringing the system into operation. Never continue working by pressing the reset button.

If the machine does not turn off for any of the reasons, then it can continue to work.

Digital thermometer-thermostat will automate the operation of your equipment.

VII. INSTRUCTIONS FOR USE OF THE WATER COOLING UNIT

If, after putting the equipment into operation, none of the alarms lights up, and the equipment itself works fine, this means that all requirements have been met correctly.

Possible emergencies and measures for their elimination are given below.

1. Error: SYSTEM IS NOT WORKING.

Cause: Fuse not on.
Remedy: Turn on the fuse.

Cause: The equipment is not receiving power.
Remedy: Check the ends of the power cable.

2. Error: COMPRESSOR NOT WORKING.

Cause: No power is supplied to the motor contactor.
Remedy: Check the fuse.

Cause: Fuses blown.
Remedy: Possible compressor jamming due to internal damage. Contact the service company for control.

Cause: The low-high pressure switch has opened circuit.
Remedy: The system is clogged or there is a lack of gas. In this case, clean the condenser. One of the fans is not working.

Cause: The oil pressure switch has opened the circuit.
Remedy: Check the oil level in the compressor. If the level is sufficient, then restart the compressor.

Cause: The thermostat has open circuit.
Remedy: Check water temperature and thermostat settings.

Cause: Freezing thermostat has open circuit.
Remedy: Check the heat exchanger for freezing. If there is no freezing, wait until the water heats up.

Cause: The compressor motor thermistor has open circuit.
Remedy: Find and remove the cause of the motor overheating. Wait 5-6 hours for the motor to cool down.

3. Error: COMPRESSOR OPERATES PERIODICALLY.

Cause: Low pressure setting adjusted to high level.
Remedy: Adjust the low pressure setting to normal.

Cause: The solenoid valve on the liquid port is leaking and there is frost around the valve.
Remedy: Call service to replace the solenoid valve.

Cause: Fluid connection too cold.
Remedy: The drying filter is clogged. Call for service to replace the drying filter or solenoid valve spool.

Cause: The water in the heat exchanger has frozen.
Remedy: Wait for the ice to melt and investigate the cause of the freezing.

4. Error: COMPRESSOR IS PERMANENTLY RUNNING.

Remedy: Set the thermostat to +10, 11°C.

Cause: Lack of gas in the system.
Remedy: Find out the causes and call the service to replenish the gas.

Cause: The contacts in the motor are stuck.
Remedy: Replace contacts.

5. Error: LACK OF OIL IN THE COMPRESSOR.

Cause: Oil level dropped.
Remedy: Find out the cause. Call service for oil replenishment.

Cause: The system is operating at low pressure.
Remedy: There is a gas leak in the system. Locate the leak and call a service to replenish the gas.

Cause: Crankcase plug is leaking oil.
Remedy: If the crankcase plug is loose, tighten it. If the leak does not stop, call the service.

Cause: Expansion valve loose.
Remedy: Attach with a metal strip.

6. Error: COMPRESSOR IS NOISY

Cause: Oil level dropped.
Remedy: Find out the cause. Call the service to replenish the oil.

Cause: The oil level is too high.
Remedy: Check the oil level. If the level is too high, call the service.

Cause: The internal parts of the compressor are damaged.
Remedy: Call a service to remove and further repair the compressor.

Cause: Expansion valve left open.
Remedy: Call the service to replace the valve.

Causes: Loose compressor mounting bolts.
Remedy: Tighten the screws.

7. Error: SUCTION PRESSURE TOO HIGH.

Causes: The liquid level in the heat exchanger is too high, the expansion valve does not control the liquid level.
Remedy: Call for service to replace or adjust the expansion valve.

Cause: The suction valve is broken.
Remedy: Call for service to replace or repair the valve.

8. Error: SUCTION PRESSURE TOO LOW.

Cause: The gas level has dropped and bubbles are visible in the sight glass.
Remedy: Call the service to determine the presence of a gas leak and top it up if necessary.

Cause: The expansion valve has remained in the closed position.
Remedy: Call a service to replace the expansion valve.

Cause: The thermostat is set to low.
Remedy: Set the thermostat to +10, 11°C.

Cause: There is a large amount of oil in the system, the needle of the expansion valve is frozen.
Remedy: Call a service center to drain the oil and replace the drying filter.

9. Error: DISCHARGE PRESSURE TOO HIGH.

Cause: The condenser fan motor is defective.
Remedy: Investigate causes and call service for elimination.

Causes: The condenser fan rotates in the wrong direction.
Remedy: Only valid for 3-phase fans. Swap the two input pins.

Cause: Too much gas in the system.
Remedy: Call the service to monitor.

Cause: There is foreign gas in the system.
Remedy: Call service for gas release and control.

Cause: Clogged capacitors.
Remedy: Clean capacitors compressed air.

10. Error: DISCHARGE PRESSURE TOO LOW.

Cause: A large amount of cold air enters the condenser (winter conditions).
Remedy: If the system has two fans, in winter conditions one of them should be switched off with a fuse.

Cause: Unload start or power control systems remain permanently on.
Remedy: Call the service to determine the cause.

Reason: Gas leak.
Remedy: Call a service to locate and repair the gas leak and leak test.

VIII. CARE OF THE WATER COOLING UNIT

Before carrying out maintenance work, the main fuse installed on your side must be switched off. The authorized repair person is obliged to lock the electrical panel and remove the key for storage.

The most vulnerable point in refrigeration equipment is the compressor. The greatest number of breakdowns in refrigeration compressors occurs for the following reasons: 1 - the refrigerant enters the compressor in liquefied form, 2 - insufficient lubrication of the compressor with oil. Compressor wear due to continuous operation at normal conditions practically impossible. Prevention of breakdowns is possible only with the correct use of the equipment and its regular inspection.

1. Once a week.

Check oil level. If the level is below the average mark on the glass eye, and during operation of the equipment, when checking every half an hour, the level continues to rise and fall, call the service to top up the oil level. If the color of the oil is too dark and close to black, a service should be called for an oil change. It is recommended to use the same type of oil that was before the change.
- Slots in the condenser should be blown out with compressed air.
- In case of appearance of abnormal signs of operation (noise, vibration, icing, increase-decrease in operating pressure, heating) of the equipment, you should immediately contact service center.
In addition, the discharge pressure of the system should be constantly monitored. If this pressure is too high, then there is a possibility of non-liquefiable gases in the system.
Check the amount of refrigerant through the sight glass regularly. If there are a lot of bubbles in the gas, the gas should be topped up. The lack of gas can also be judged by insufficient cooling, as well as by excessive heating of the compressor.

2. Once a month.

It is recommended to repeat all the operations done every week.
- All motors should be inspected and oil added if necessary.
- Check the strength of the motor mounts.
- If belts are used in the system, their tightness should be checked regularly. If the belt, when pressed with a finger, deviates by 20-25 mm, then the tension can be considered normal.

3. Once a year

The water chiller must repeat all weekly and monthly procedures technical inspection.
- Inspect the contacts on the electrical panel and check the functions. To control the operation of thermal relays, test them by lowering the settings below the established ones.
- Check the contacts of the main fuse.
- Clean the filters of the water supply system.
- Replace the drying filter in the cooling system by calling the service team.
- If there is an air duct, inspect it (dents, damage, sagging, etc.).

IMPORTANT NOTE:
Intervention in freon systems should only be carried out by experienced personnel of your company.
If the ambient temperature in which the chiller operates is below 0 ° C, there is a possibility of freezing of the water in the cooler. If the chiller will not be used for a long time, antifreeze should be added to the water, or the water should be drained.

IX. GUARANTEE

The determination of the repair technique, as well as the parts to be repaired or replaced, is entirely carried out by our company.

Damage caused by transportation, handling and installation after shipment by our company is not included in the warranty.

Damage caused by the use of equipment that is not in accordance with the above recommendations for use is not covered by the warranty.

The warranty period starts from the day the goods are shipped.

In the event that the use of the equipment is consistent with the above recommendations for use, and repair procedures were carried out only professional staff of our company, the warranty period for servicing the equipment is 1 year.