The explosion-proof air conditioner systematically checks the power input and output signal power of each section in an orderly manner, then compares with normal signals to determine abnormalities in this part of the circuit.。

When repairing the explosion-proof air conditioner, the circuit of the explosion-proof dehumidification and refrigeration automatic control system, the main circuit theory, analysis of the most basic circuits of the explosion-proof air conditioner, control circuits, main circuits, and loads.。

Following the principle from simple to complex, starting from the first basic principle, gradually proceed from the main circuit to the peripheral circuits and components, focusing on the optocoupler circuit and control loop inspection. Go deeper, gradually narrow down the scope of electronic control system fault testing, and ultimately locate the fault. For connection failures (such as incorrect wiring, etc.), the first rule of automatic control systems is to conduct detailed maintenance. For the explosion-proof air conditioner, systematically inspect the power input and output signal power of each part in a linked list order, then compare with normal signals to determine if this part of the power circuit is abnormal.For explosion-proof split air conditioners, based on the communication line engineering, one-way communication (indoor and outdoor), indoor control command output, outdoor unit faults, such as the difference between the indoor unit and outdoor unit, if it cannot operate normally, you can identify the outdoor unit fault.。

The explosion-proof air conditioner uses fault self-diagnosis to specifically analyze the causes of failure until a solution is found.。

Explosion-proof Electricalcontrolsystem的FAQWithfollowingSeveralPoint:

1、ConnectionlossInvincibleUse，Assemble，Wiring LayoutLoosedetach，contactInvincibleGoodOn-site象 Or ConnectionBreadreductionRepair丁BunInvincibleEtherBrilliant，你ThenShouldShouldMostLeadingbeClearRemoveTransportationDuringExtentIn May occur的commonfault。

2. Component faults. Some components have poor characteristics, cannot withstand electrical shock or electrical equipment parameters, thus failing to achieve technical performance, which may cause faults.。The components with relatively high failure rates are filter devices, solenoid valves, switches, contactors, and other high-power drive components.。A multimeter can be used for maintenance inspection to eliminate abnormal components one by one.。

3. Interference failures. Voltage fluctuations or external strong magnetic field interference can be caused by electronic control circuits, which is abnormal.。

4. Human errors. Operator misoperation, such as explosion-proof remote control, set values not meeting standards, can cause the electronic control circuit to fail to operate normally.。

Common fault solutions for explosion-proof automotive air conditioning systems

InteractiveLinkedNetworkExplosion-proof Air ConditionerIsSuch asToday Frequently Use的SystemCoolingunit， And Explosion-proof Air ConditionerSystemCoolingunit Generally AlsoCanOutputOn-sitecommonfault，butThesesomecommonfaultallIsFivePanel8Siemens。Even so, because explosion-proof central air conditioners are equipment commonly used in hazardous areas, problems with explosion-proof air conditioners are always present.。Below, we will briefly introduce the four major faults most commonly occurring in explosion-proof central air conditioners.。

explosion-proofInCentralair conditioner Generally Cangenerate的4GreatercommonfaultClassClassFor:

1、SystemCoolingunitHinder塞:

Frequently OutputOn-siteInGrossFine血Pipe And StationLiquidClassDistanceApplianceProcessing， Due To TheseTwoProductionInvincibleAspectIssystemDomesticNarrowSmall的InvincibleArea， Relatively common的Hinder塞EdgeFaultWithThreeVarious:DirtyBlock、IceBlock And WeldingBlock。

A. Dirt blockage generally occurs at the inlet of the capillary tube, caused by waste in the system (such as weld scars, rust filings, oxide layers, etc.) blocking the pipeline. During inspection, lightly tapping the capillary tube area may temporarily restore normal operation. Additionally, from the condensation phenomenon, frost formation on the pipeline and component surfaces, and the pressure recovery speed time when shutting down, the location and nature of the blockage can be determined.

B. Ice blockage generally occurs at the capillary tube outlet, caused by moisture in the system. At the capillary outlet, sudden vaporization and cooling cause small ice particles to form and block the capillary outlet. When diagnosing, heat the capillary outlet with a welding torch; if the effect returns to normal or improves, it is confirmed as ice blockage. Alternatively, if the equipment can cool for a period after restarting following standby, it is confirmed as ice blockage. Ice blockage generally occurs in newly assembled or just-repaired air conditioners.。

C. Weld blockage generally also occurs at the welding points of the capillary tube, with conditions similar to dirt blockage and ice blockage, and mostly occurs in newly assembled units.。

2、SystemCoolingunitDrainDew:

air conditionerSystemCoolingSystemHeat的EquippedStructureIsCoolingMedium，Such assystemSoftComponentsoccurLeakDuring，CoolingMediumDrainDewthenSoftInstallationManufacturerWithdifference Or Thoroughly air conditionerInvincibleSystemCooling， And air conditioneroccurDrainDew的AreaRegionmainlyStructureOn-siteinTwoAppliance的VariousProductionWeldingConnector、GrossFine血PipeArc WeldingWeldingProcessing、AerospacePressureMachineSuctionDrainSodaPipe、喇叭ReputationRegular、CopperSodiumSimensCrack、RubberPipeEtc.InvincibleAspect，CriticalCheckWhenDemandLeadingThrough估Measure，ImportantPointForRubberPipeVariousWeldingReputationProcessing，DrainDewProcessing Generally allWithOil渍。

3、4VentilationValvecommonfault:

Generally OutputOn-siteInSystemWarmWhen，4VentilationValveSuctionOverallInvincibleEtherBrilliant、StationBlock Or Card住，CreateCostSystemWarmPerformancedifference，inClass辨WhenDemandFor4VentilationValveVentilationPay AttentionClosedpower supply听SuctionOverallIsnoAchieveStatus，inDuring MaintenanceDemandaccording tocontinuouslyTo4VentilationValvePlugElectric Or LightLightInvincible敲击4VentilationValveMakePositionCalibration。

4、Energy-savingMainstreamValvecommonfault:

PreventCircuitValveinCausingCooling的WhenWeatherdirectlyVentilationDetermination，butSystemWarmWhenCoolingMedium Certainly CriticalThrough协HelpGrossFine血Pipe，QuiteEnergy-savingMainstreamValveSealing PerformanceInvincibleCompact Or Pioneer协HelpGrossFine血PipeHinder塞When，air conditionerSystemHeatinRestrictedAchieveAffect， So If air conditionerInvincibleSystemCoolingnormal的butSystemWarmdifferenceWhen，inClearRemove4VentilationValveproblemWhenCriticalImportantPointForEnergy-savingMainstreamValve。

In view of the above common faults of explosion-proof central air conditioners, it is generally recommended that explosion-proof air conditioner operators conduct safety inspections on the refrigeration system and perform repairs based on actual conditions.。ThatSample，explosion-proofAutomotiveair conditionersystemOutputOn-siteAbnormalWhen，ItsrepairLayerAspects的keyPointmainlyincluding:

1、ViewCheckInsideOverseasMachineWorking State:Such asExcellentIndicateLightPlateTableBrightstateEnvironment，OutdoorMachineIsInvincibleIsIndustryOperatingIn，RiskStrengthconductOutputWith没Withproblem，OutdoorMachineRiskMachine、SystemCoolingcompressorIsInvincibleIsOperateOperating，Advanced And JudgmentDeterminationOutputManufacturerUsersElectricApplianceRawBecausealsoIssystemSoftComponentsfactorconductCausing的air conditionerInvincibleSystemCooling。

2、Inspectionair conditionerVariousCanIndexStandard:

A、air conditionerMainstreamLevelstateEnvironment， Generally air conditionerDomesticMachinePermeateLevelcontinuousInCentralair conditionernormal的，but鉴InAerospaceStationRelative Humidity、Ambient TemperatureHazardousHarmfulOnlyIsAsOneStandardValue。

B. Temperature difference between intake and exhaust outlets. The normal intake and exhaust air temperature difference should be 12-14 degrees, but it is also affected by operating temperature and wind speed.。

C. Check the pressure of the detection system pipeline. Generally, during cooling, the low-voltage working pressure is between 0.45Mpa-0.50Mpa, and during heating, the high-pressure working pressure is between 1.8Mpa-2.2Mpa. However, the working pressure is affected by the working temperature. The higher the air supply temperature of the central air conditioner, the higher the exhaust temperature and the condensation temperature, and vice versa; the greater the air conditioning load, the higher the suction pressure and the condensation temperature rises (the normal condensation temperature of the evaporator is around 5-7 degrees).。

During the use of the explosion-proof central air conditioner, the refrigeration unit should not frequently malfunction.。If the explosion-proof central air conditioner malfunctions, do not panic. As long as you follow the correct maintenance methods to repair the explosion-proof central air conditioner, you can effectively troubleshoot it based on the actual situation and ensure its normal operation.