Heat Controller A-MMC18FA-1 Compressor/Outdoor Fan dont operate, Check Point Comp. on Comp. OFF

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Troubleshooting Guide

Trouble 3

The Compressor/Outdoor Fan don't operate

Turn on the main power.

Operate Cooling Mode by setting the disired temperature of the remote controller to less than one of the Indoor temperature by 1°C(33.8°F) at least.

When in air circulation mode, compressor/outdoor fan is stopped.

Check that the sensor for Indoor temperature is attatched and as close as to the Heat Exchanger (Evaporator.)

When the sensor circuit for Indoor temperature and connector have a bad connection or are not engaged, Compressor/Outdoor fan is stopped.

• Check the related circuit of R01H(1K), R02H(1K), R03H(1K), R04H(1K), Micom(pin No. 74 , 75 , 76 , 77 ).

• Check that the Indoor temperature sensor is disconnected (about 10K at 25°C(77°F)).

Check the Relay(RY-PWR, RY-START) for driving Compressor.

•Check the voltage between brown and blue cable of terminal which connects to the Outdoor unit (About AC208V / 230V).

•Check the Outdoor PCB Assembly's relay circuit.

	Check Point	Comp. ON	Comp. OFF
	Between Micom(No. 50,51) and	DC 5V	DC 0V
	GND	DC 5V	DC 0V
	GND
	Between IC01M(No. 10) and	DC 1V↓	DC 12V
	GND	DC 1V↓	DC 12V
	GND

Turn off main power.

Check the electrical wiring diagram of Outdoor side.

Check the open or short of connecting wires between Indoor and Outdoor.

Wall Mounted Multi-Zone Split System Air Conditioner

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Contents Heat CONTROLLER, INC Table of Contents KBtu/h 3 rooms Symbols Used in this ManualKBtu/h 2 rooms Safety Precautions InstallationBe sure not to do Be sure to follow the instruction Control box securely Cuit and breakerDo not install, remove, or re Do not install the product on aDefective installation stand Do not allow water to run into electric partsFlooded or submerged, contact When the product is soaked Be cautious that water canNever enter the product Use two or more people to lift and transport the product Install the drain hose to ensure that Keep level even whenInstalling the product Operational Do not use the remote is the batteries have leaked Seaside applications and installation Selecting the locationOutdoor UnitSplit Type Indoor DimensionsIndoor Unit Outdoor Unit 18kBtu/h24kBtu/h UE2 36kBtu/hProduct Specifications Indoor Unit Type Wall Mounted ModelOutdoor Unit Multiple piping models MMC18FA-1 MMH18FA-1MMC24FA-1 MMH24FA-1 MMC36FA-1 MMH36FA-1 Installation Tools InstallationInstallation Parts Selecting the best location 18 / 24 kBtu/h KBtu/h Piping length and elevationMulti Piping Type Installing Installation PlateStandard Type Drilling the hole in the wallFlaring Work and Connection of Piping Flaring workIndoor Connecting the PipingCheck Indoor unit installation Wrap the insulation material around the all connectionsFor left rear piping Wrap the insulation material around the connecting por- tion Good case Bad caseRemote Control Preparationoptional Outdoor unit 36 kBtu/h OutdoorOutdoor unit 18/24 kBtu/h Connect the cable to the Indoor unit Tions ETL recognized and CSA certifiedConnect the cable to the Outdoor unit Outdoor unitMethods of connecting the cable How to connect wiring to the terminalsModel Drain piping Checking the drainageTo check the drainage Secure the taped piping along the exterior wall using Insulating the Pipe and Special Piping ApplicationsAir Purging and Evacuation Leak checkingPreparation Leakage testFinishing the job Repeat evacuation procedure for each indoor unitEvacuation Charging AdditionalTest Running Split TypeCooling Mode Operation Soft Dry Operation ModeHeating Mode Operation OperationFuzzy Operation for Cooling Defrost ControlHeatingFuzzy Operation On-Timer Operation Off-Timer OperationAirflow Speed Selection Fuzzy Operation for DehumidificationOff-Timer = On-Timer Operation Sleep Timer OperationChaos Swing Mode Chaos Natural Wind ModeForced Operation Buzzer SoundFunction of Indoor Unit Split Type Indoor UnitFunction of Outdoor Unit Cooling Model , Heat Pump Model Remote Control OperationTime Setting Buttons Used to adjust the time Disassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Motor Cover Indoor Unit Schematic DiagramElectronic Control Device Outdoor Unit TMP87CM41FRY-4WAY RY-LIQ RY-GAS RY-FANL RY-FANH Wiring Diagram Indoor Unit Outdoor UnitMMC24FA-1 Component Locations Bottom ViewDisplay Assembly Split Type 6871A20680 Component side Solder side Troubleshooting Guide Refrigeration Cycle DiagramMMC18FA-1 MMH18FA-1MMH24FA-1 MMC36FA-1 MMH36FA-1Indoor Error Outdoor ErrorError Indicator Self-diagnosis FunctionCycle Troubleshooting Guide Trouble analysisElectronic Parts Troubleshooting Guide Procedure Specification RemedyProduct doesnt operate with the remote controller Compressor/Outdoor Fan dont operate Check Point Comp. on Comp. OFFTrouble 4 When indoor Fan does not operate NectorVoltage of Connectors according to Indoor Fan Speed RY-COMP-BWhen Vertical Louver does not operate Error Code Check PointIndoor air sensor Indoor inlet pipe sensorCommunication line is shorted at GND Description Cause of error Check point & Normal conditionPower input AC 230V.Outdoor, Indoor Comp OFF Pipe sensor Outdoor air sensorCondensor pipe sensor Way, 3-way Valve Way Valve Liguid SideProcedure Pumping downAll the refrigerant leaked Replace the valve and service port capsEvacuation Replace the valve stem nuts and the service port nut Gas ChargingAfter Evacuation Connect the gauge to the charging cylinderExploded View Model B-MMC09FA-1, B-MMH09FA-1, B-MMC12FA-1, B-MMH12FA-1Model A-MMC18FA-1, A-MMH18FA-1 Model A-MMC24FA-1, A-MMH24FA-1 Model A-MMC36FA-1, A-MMH36FA-1 Heat CONTROLLER, INC 08/06/2008