Circuit diagramsDomestic air conditioner11.4.12 High work-intense protectionElectrify the machine again and turn it on with theremote controller, check whether the windtemperature is below 149°FThe malfunction is reportedafter the machine has runfor some time?1 、 Check room temperature andpipe temperature sensor.2、the temperature monitoring circuitof the indoor mainboardThe indoor unit blows poorlydue to blocked filters or poorcondition of the fan?1) Clean the filters2) Reinstall the fan.Use some tools to measure the pressure of system，YESNOYESNOMethod ofmalfunction detectionMalfunction detectionconditionsTroubleshootingHigh work-intense control is activated in the heating mode if the temperature beingsensed by the heat exchanger thermistor exceeds the limit.Activated when the temperature being sensed by the heat exchanger rises abovetwice in 30 minutes.■Faulty electronic expansion valve■Dirty heat exchanger■Faulty heat-exchange sensor■Insufficient gasSupposed causes* CautionBe sure to turn off power switch before connect or disconnect connector, or elseparts damage may be occurred.LED1 flash 21 timesOutdoor diplay50149°F
