HVAC tools daily maintenance knowledge
In the daily operation of air conditioning, it will inevitably be some failure, especially the refrigeration system, more prone to problems. Need to effectively use HVAC tools for routine maintenance, the general air conditioning failure phenomenon is different, varied, but it can be said to be similar, there are rules to follow. Today for everyone to sum up a few common air conditioning failure and the corresponding maintenance methods, hoping to help everyone.
Fault one
Phenomenon: air conditioning system does not work and air conditioning compressor does not pull.
Cause: The refrigerant is partially or completely leaking.
Maintenance: Find out the point of failure that caused the refrigerant to leak and replace the damaged parts, and then re-evacuate it, then add the appropriate amount of refrigerant. Refrigerant leakage prone parts are: piping and its seals, condensate, expansion valves, pressure switches and so on.
Failure two
Phenomenon: air conditioning can not be cooled, the compressor can pull, but the low pressure is very low and the discharge pipe surface temperature is extremely high.
Cause: The temperature of the expansion valve is damaged, resulting in refrigerant leakage can not be cooled.
Maintenance: will be broken out of the warmth of the head replaced, and the system into a vacuum, packing, and then according to the provisions of the air conditioner to add the appropriate amount of refrigerant.
Failure three
Phenomenon: air conditioning system does not work and air conditioning compressor does not pull, but the air conditioning system pressure balance.
Cause: Air conditioning system of the insurance film, relays, thermistor wiring, condensation fan wiring and other components of the problem.
Maintenance: Disassemble the above parts and replace the damaged parts.
Failure four
Phenomenon: poor cooling effect, air volume is small, and the chassis running a larger noise.
Cause: There is a foreign matter in the air conditioning pipe, or dust accumulation causes the filter to block.
Maintenance: Remove the filter regularly and clean the filter, clean the pipe, and then reinstall it.
Failure five
Phenomenon: air conditioning cooling effect is poor, the normal operation of the chassis but high, low pressure are too high.
Cause: Excessive refrigerant is added, or too much lubricant is added to the compressor.
Maintenance: If the refrigerant is added too much, then the discharge, recovery of excess refrigerant; if the oil filling too much, wipe the excess oil to the appropriate dose. And then the same to take the time, pressure, plus refrigerant and other steps.
Failure six
Phenomenon: With the use of longer time, air conditioning cooling effect deterioration, high and low pressure are low.
Cause: the use of the various parts of the streets loose.
Maintenance: Re-tighten the loose connector.
Air conditioning common fault analysis and exclusion:
The compressor can not run
Cause 1: Power failure
Exclude: check the troubleshooting with a multimeter and pen. The fuse is replaced by a fuse, and the wire is replaced
Cause 2: The supply voltage is too low
Eliminate the use of multimeter to measure the voltage, if necessary, with the power regulator device
Cause 3: Wire connection is loose or broken
Exclude: check the wire connection parts, loose connector should be re-inserted, plug tight, should be overhauled by professionals
Air conditioning maintenance compressor for a long time running without stopping
Cause 1: Due to the lack of refrigerant, all or part of the refrigerant leakage,
Exclude: identify the leak site, trap, the refrigeration system to re-vacuum, adding refrigerant, etc., should be professional maintenance
Cause 2, the filter is blocked.
Exclude: replaceable filter, re-evacuation of refrigeration system, adding refrigerant, etc., should be repaired by professional
The fan can not run
Cause 1: The master switch is in poor contact
Exclude: use a multimeter to measure the main control switch contact resistance, the resistance is too large or zero, should be repaired or replaced
Cause 2: The fan motor coil is damaged
Exclude: check with a multimeter, replace the same size, the same speed fan motor
Cause 3: The fan of the fan and the wind between the set screws loose
Exclude: Fasten the set screw
Cause 4: The fan capacitor is open or shorted
Exclude: Check the capacitor and replace the same size of the capacitor
Compressor start and stop frequently
Cause 1: The room temperature control value is set incorrectly
Exclude: appropriate to increase the indoor control temperature and the difference between the original room temperature
Cause 2: Ambient temperature is too high
Exclude: improve the working environment, such as setting the grille, to avoid direct sunlight, the air conditioner installed in a well ventilated environment
Cause 3: The condenser is dirty
Remedy: Clean the condenser and remove the dust from the outside surface of the condenser
Heating and cooling air conditioning refrigeration failure
Cause 1: Electromagnetic reversing valve coil failure
Exclusion: Measure the solenoid valve with a multimeter, if the coil is broken or burned, replace the same size solenoid valve
Reason 2: electric heating device failure
Exclude: check with a multimeter, replace the same specifications of the electric heating wire or temperature protector
Cause 3: The temperature controller is out of order
Exclude: Check the thermostat with a multimeter, if it is still invalid if the contact is treated with rust, then replace the same specification temperature controller
Air conditioner noise and vibration
Cause 1: The fixing screw is loose or peeled off
Exclude: Check where the screw is loose and tighten it
Cause 2: The compressor line is in touch
Exclusion: hand the appropriate adjustment of high and low pressure pipe at the beginning or easy to touch the tube on the rubber tube, so as not to touch when the abnormal noise
More than a few failures in the daily life is more common. If the home air conditioning is not working properly, we can compare the above a few, we can find the cause of the failure, and a simple maintenance, and then we can run the air conditioner on the normal friends.
Fault one
Phenomenon: air conditioning system does not work and air conditioning compressor does not pull.
Cause: The refrigerant is partially or completely leaking.
Maintenance: Find out the point of failure that caused the refrigerant to leak and replace the damaged parts, and then re-evacuate it, then add the appropriate amount of refrigerant. Refrigerant leakage prone parts are: piping and its seals, condensate, expansion valves, pressure switches and so on.
Failure two
Phenomenon: air conditioning can not be cooled, the compressor can pull, but the low pressure is very low and the discharge pipe surface temperature is extremely high.
Cause: The temperature of the expansion valve is damaged, resulting in refrigerant leakage can not be cooled.
Maintenance: will be broken out of the warmth of the head replaced, and the system into a vacuum, packing, and then according to the provisions of the air conditioner to add the appropriate amount of refrigerant.
Failure three
Phenomenon: air conditioning system does not work and air conditioning compressor does not pull, but the air conditioning system pressure balance.
Cause: Air conditioning system of the insurance film, relays, thermistor wiring, condensation fan wiring and other components of the problem.
Maintenance: Disassemble the above parts and replace the damaged parts.
Failure four
Phenomenon: poor cooling effect, air volume is small, and the chassis running a larger noise.
Cause: There is a foreign matter in the air conditioning pipe, or dust accumulation causes the filter to block.
Maintenance: Remove the filter regularly and clean the filter, clean the pipe, and then reinstall it.
Failure five
Phenomenon: air conditioning cooling effect is poor, the normal operation of the chassis but high, low pressure are too high.
Cause: Excessive refrigerant is added, or too much lubricant is added to the compressor.
Maintenance: If the refrigerant is added too much, then the discharge, recovery of excess refrigerant; if the oil filling too much, wipe the excess oil to the appropriate dose. And then the same to take the time, pressure, plus refrigerant and other steps.
Failure six
Phenomenon: With the use of longer time, air conditioning cooling effect deterioration, high and low pressure are low.
Cause: the use of the various parts of the streets loose.
Maintenance: Re-tighten the loose connector.
Air conditioning common fault analysis and exclusion:
The compressor can not run
Cause 1: Power failure
Exclude: check the troubleshooting with a multimeter and pen. The fuse is replaced by a fuse, and the wire is replaced
Cause 2: The supply voltage is too low
Eliminate the use of multimeter to measure the voltage, if necessary, with the power regulator device
Cause 3: Wire connection is loose or broken
Exclude: check the wire connection parts, loose connector should be re-inserted, plug tight, should be overhauled by professionals
Air conditioning maintenance compressor for a long time running without stopping
Cause 1: Due to the lack of refrigerant, all or part of the refrigerant leakage,
Exclude: identify the leak site, trap, the refrigeration system to re-vacuum, adding refrigerant, etc., should be professional maintenance
Cause 2, the filter is blocked.
Exclude: replaceable filter, re-evacuation of refrigeration system, adding refrigerant, etc., should be repaired by professional
The fan can not run
Cause 1: The master switch is in poor contact
Exclude: use a multimeter to measure the main control switch contact resistance, the resistance is too large or zero, should be repaired or replaced
Cause 2: The fan motor coil is damaged
Exclude: check with a multimeter, replace the same size, the same speed fan motor
Cause 3: The fan of the fan and the wind between the set screws loose
Exclude: Fasten the set screw
Cause 4: The fan capacitor is open or shorted
Exclude: Check the capacitor and replace the same size of the capacitor
Compressor start and stop frequently
Cause 1: The room temperature control value is set incorrectly
Exclude: appropriate to increase the indoor control temperature and the difference between the original room temperature
Cause 2: Ambient temperature is too high
Exclude: improve the working environment, such as setting the grille, to avoid direct sunlight, the air conditioner installed in a well ventilated environment
Cause 3: The condenser is dirty
Remedy: Clean the condenser and remove the dust from the outside surface of the condenser
Heating and cooling air conditioning refrigeration failure
Cause 1: Electromagnetic reversing valve coil failure
Exclusion: Measure the solenoid valve with a multimeter, if the coil is broken or burned, replace the same size solenoid valve
Reason 2: electric heating device failure
Exclude: check with a multimeter, replace the same specifications of the electric heating wire or temperature protector
Cause 3: The temperature controller is out of order
Exclude: Check the thermostat with a multimeter, if it is still invalid if the contact is treated with rust, then replace the same specification temperature controller
Air conditioner noise and vibration
Cause 1: The fixing screw is loose or peeled off
Exclude: Check where the screw is loose and tighten it
Cause 2: The compressor line is in touch
Exclusion: hand the appropriate adjustment of high and low pressure pipe at the beginning or easy to touch the tube on the rubber tube, so as not to touch when the abnormal noise
More than a few failures in the daily life is more common. If the home air conditioning is not working properly, we can compare the above a few, we can find the cause of the failure, and a simple maintenance, and then we can run the air conditioner on the normal friends.
评论
发表评论