Heat Controller A-MMH36FA-1, B-MMH12FA-1 Outdoor air sensor, Condensor pipe sensor, Pipe sensor

Page 75

			Troubleshooting Guide

Error	Description	Cause of error	Check point & Normal condition
code	Description	Cause of error	Check point & Normal condition
code

		• Open / Short	Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)
44	Outdoor air sensor	• Soldered poorly	Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)
44	Outdoor air sensor	• Soldered poorly	Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error	Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error

		• Open / Short	Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
45	Condensor pipe sensor	• Soldered poorly	Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
45	Condensor pipe sensor	• Soldered poorly	Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error	Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error

		• Open / Short	Normal resistor : 200KΩ/ at 25°C(77°F) (Unplugged)
47	D-Pipe sensor	• Soldered poorly	Normal resistor : 200KΩ/ at 25°C(77°F) (Unplugged)
47	D-Pipe sensor	• Soldered poorly	Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error	Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error

Ω

Ω

Check the resistance

❑Check Point

1.Estimate the resistance of each sensor.(Unplugged)

2.Estimate the voltage of each sensor.(Plugged)

3.If the resistance is 0V or 5Vdc, then sensor is abnormal

- 75 -

Service Manual

Image 75

Contents Heat CONTROLLER, INC Table of Contents Symbols Used in this Manual KBtu/h 2 roomsKBtu/h 3 rooms Control box securely Cuit and breaker Safety PrecautionsInstallation Be sure not to do Be sure to follow the instructionDo not allow water to run into electric parts Do not install, remove, or reDo not install the product on a Defective installation standWhen the product is soaked Be cautious that water can Never enter the productFlooded or submerged, contact Install the drain hose to ensure that Keep level even when Installing the productUse two or more people to lift and transport the product Operational Do not use the remote is the batteries have leaked Selecting the locationOutdoor Unit Seaside applications and installationDimensions Indoor UnitSplit Type Indoor 18kBtu/h Outdoor Unit24kBtu/h 36kBtu/h UE2Indoor Unit Type Wall Mounted Model Product SpecificationsMMC18FA-1 MMH18FA-1 Outdoor Unit Multiple piping modelsMMC24FA-1 MMH24FA-1 MMC36FA-1 MMH36FA-1 Installation Installation PartsInstallation Tools Selecting the best location Piping length and elevation Multi Piping Type18 / 24 kBtu/h KBtu/h Drilling the hole in the wall Installing Installation PlateStandard TypeFlaring work Flaring Work and Connection of PipingConnecting the Piping CheckIndoor Wrap the insulation material around the all connections Indoor unit installationFor left rear piping Wrap the insulation material around the connecting por- tion Bad case Good caseRemote Control Preparationoptional Outdoor Outdoor unit 18/24 kBtu/hOutdoor unit 36 kBtu/h Tions ETL recognized and CSA certified Connect the cable to the Indoor unitOutdoor unit Connect the cable to the Outdoor unitHow to connect wiring to the terminals Methods of connecting the cableModel Checking the drainage To check the drainageDrain piping Insulating the Pipe and Special Piping Applications Secure the taped piping along the exterior wall usingLeakage test Air Purging and EvacuationLeak checking PreparationRepeat evacuation procedure for each indoor unit EvacuationFinishing the job Additional ChargingSplit Type Test RunningOperation Cooling Mode OperationSoft Dry Operation Mode Heating Mode OperationDefrost ControlHeating Fuzzy OperationFuzzy Operation for Cooling Fuzzy Operation for Dehumidification On-Timer OperationOff-Timer Operation Airflow Speed SelectionChaos Natural Wind Mode Off-Timer = On-Timer OperationSleep Timer Operation Chaos Swing ModeBuzzer Sound Forced OperationSplit Type Indoor Unit Function of Indoor UnitFunction of Outdoor Unit Remote Control Operation Time Setting Buttons Used to adjust the timeCooling Model , Heat Pump Model To remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Motor Cover Schematic Diagram Electronic Control DeviceIndoor Unit TMP87CM41F Outdoor UnitRY-4WAY RY-LIQ RY-GAS RY-FANL RY-FANH Indoor Unit Outdoor Unit Wiring DiagramMMC24FA-1 Bottom View Component LocationsDisplay Assembly Split Type 6871A20680 Component side Solder side MMH18FA-1 Troubleshooting GuideRefrigeration Cycle Diagram MMC18FA-1MMH24FA-1 MMH36FA-1 MMC36FA-1Self-diagnosis Function Indoor ErrorOutdoor Error Error IndicatorTrouble analysis Cycle Troubleshooting GuideProcedure Specification Remedy Electronic Parts Troubleshooting GuideProduct doesnt operate with the remote controller Check Point Comp. on Comp. OFF Compressor/Outdoor Fan dont operateNector Trouble 4 When indoor Fan does not operateRY-COMP-B Voltage of Connectors according to Indoor Fan SpeedWhen Vertical Louver does not operate Indoor inlet pipe sensor Error CodeCheck Point Indoor air sensorDescription Cause of error Check point & Normal condition Power input AC 230V.Outdoor, IndoorCommunication line is shorted at GND Comp OFF Outdoor air sensor Condensor pipe sensorPipe sensor Way Valve Liguid Side Way, 3-way ValvePumping down ProcedureReplace the valve and service port caps EvacuationAll the refrigerant leaked Connect the gauge to the charging cylinder Replace the valve stem nuts and the service port nutGas Charging After EvacuationModel B-MMC09FA-1, B-MMH09FA-1, B-MMC12FA-1, B-MMH12FA-1 Exploded ViewModel A-MMC18FA-1, A-MMH18FA-1 Model A-MMC24FA-1, A-MMH24FA-1 Model A-MMC36FA-1, A-MMH36FA-1 08/06/2008 Heat CONTROLLER, INC