Mitsubishi Electronics PKH36FL, PKH24FL, PKH30FL Detecting abnormalities in the outdoor unit

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(4)Detecting abnormalities in the outdoor unit

After the compressor has been continuously operated for 3 minutes, if the difference between the indoor coil temperature and room temperature is out of RANGE C for 1 minute, the indoor fan speed will turn to LOW. Five minutes later, if the dif- ference is still out of RANGE C,the outdoor unit is functioning abnormally. Thus, the compressor stops and check code “P8” appears on remote controller.

RANGE A : Indoor coil temperature is more than 9 degrees above room temperature.

RANGE B : Indoor coil temperature is within 9 degrees either way of room temperature.

RANGE C : Indoor coil temperature is more than 9 degrees below room temperature.

Indoor coil temperature minus room temperature

(degree)

+9

0

-9

RANGE A

RANGE B

RANGE C

28

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Contents Contents Revised EDITION-AFeatures Part Names and Functions Specifications Models PKH18FL, PKH24FL, PKH30FL, PKH36FLData Models PKH18FL, PKH24FL, PKH30FL, PKH36FL Performance DataHeating Capacity PKH18FL Performance CurvePKH24FL PKH36FL Heating Mode PKH18FL Cooling ModeCondensing Pressure and Suction Pressure PKH24FL Cooling Mode Indoor DB temperature F 80 psi.G Pressure SuctionPKH30FL Cooling Mode PKH36FL Cooling Mode Standard Operation Data SHF PKH18FL PKH24FL PKH30FL PKH36FLOutlet AIR Speed and Coverage Range Operating RangeWith wind baffle D.B F if no wind baffle Noise Criterion Curves PKH30FLPKH36FL Band Center FREQUENCIES, HzPKH24FL OutlinesUnit inch PKH36FL PKH30FL InchWireless Remote Controller Refrigerant System DiagramPKH18FL PKH24FL PKH30FL PKH36FL Wiring Diagram Models PKH18FL, PKH24FL, PKH30FL, PKH36FL Wiring DiagramOperation FLOW-CHART Main OperationCooling Operation DRY Operation YESHeating Operation YES FAN Speed noMicroprocessor Control Outline of Microprocessor ControlCool operation time chart How to operateIndoor Unit Control Cool operationCompressor control Start conditionCoil frost protection Termination conditionsAuto vane control Auto ReturnDetecting abnormalities in the outdoor unit DRY operation time chart How to operate DRY operationFan control in DRY operation Heat operation Heat operation time chart How to operateDisplay in Heat operation Booster heater control Overheat protectionOverheat prevention Indoor coil temperature abnormality detection Defrosting operationMode change Initial modeTemperature range COOL/DRY operation Auto vane controlAuto return Timer function Timer operationTest run Emergency operation Before emergency operationDip switch and jumper connector functions On remote controller board On indoor controller boardIndoor FAN Control Wireless remote controller pair number setting operation Model NoTroubleshooting Self-checkOther Troubles and Causes Wrong Wiring on Site Between remote controller and indoor unitHOW to Check the Parts Check pointsDisassembly Procedure Operating Procedure PHOTOS&ILLUSTRATIONIndoor unit PKH24FL PhotoRemoving the intake grilles Removing the vane motorRemoving the drain pan Removing the line flow fan and the fan motor Operating Procedure PhotosRemoving the electrical heater Parts List Electrical Parts PKH18FL PKH24FL PKH30FL PKH36FLQty / set Wiring Parts No Parts Name Specifications T7W E13T7W E14 R01 12G 621Structural Parts PKH24FL PKH30FL PKH36FLPage Distributed in Dec No.OC276 New publication, effective Nov Specifications are subject to change without notice