Heat Controller MSH-0186/A manual Cycle Troubleshooting Guide, Trouble analysis, Cause of Trouble

Page 49

"Cycle Troubleshooting Guide

1. Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Temp. difference

:approx. 0°F

All amount of refrigerant leaked

Current

:less than 80% of

out.

 

rated current

Check refrigeration cycle.

Temp. Difference

Temp. difference

Current

Operating Current

Temp. difference

Current

:approx. a°C(140F) I

Refrigerant leakage

:less than 80%

of

Clog of refrigeration cycle

rated current

 

Defective compressor

:less than 80C(1 40F)

 

-less than 80%

of

Excessive amount of refrigerant

rated current

 

 

Temp.difference :over8°C(14°F) Normal

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air

"humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Suction pressure

Temperature

Cause of Trouble

(Compared with the

(Compared with the

normal value)

normal value)

 

 

High

Defective compressor

 

Defective 4-way reversing valve

Higher

 

 

 

 

Normal

Excessive amount of refrigerant

 

 

Insufficient amount of

Lower

Higher

reidgerant(Leakage)

 

 

Clogging

Description

Current is low.

High pressure does not quickly rise at the beginning of operation.

Current is low.

Current is low.

Notice:

1.The suction pressure is usually 56.8-71.0 PSIG at normal condition.

2.The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty-

-49-

0

Image 49
Contents Heat CONTROLLER, INC Contents Indoor Unit FunctionsAuto Wind Operation Owoff Operation Mode Selection Remote ControllerFan Speed Selection Power Supply 17Z,-W Product SpecificationsCooling OnlyAir Circulation Oumw 1 ,260Product SpecificationsCooling & Heating Indoor Unit Jzý, Installation plateTubing hole cover 9k, 12k 18k, 24kGas side Outdoor UnitModel DIM Cooling Only Models Refrigeration Cycle DiagramCamay a Heating Cooling & Heating ModelsHeat Evaporator I / \Indoor Wiring Diagram Indoor Wiring DiagramMSS-012, MSS-018, MS18, MSS-024, MSF4424 Iroom9k, 12k Outdoor Unit Cooling Only Models18k 24k LO.a12k 18k 24k Cooling Operation Mode Time delay Safety ControlFunction of main control Airflow Direction ControlIntake AIR Temp Setting TEMP. +1F Auto Operation Electronic control modeSetting TEMP. -10F MODE1rStart ModeoMODE2 MODE3 MODE4 Modes EndIntake AIR TE Soft Dry Operation ModeSelecting Low OFF CompressorSetting Temp Intake AIR Temp Setting TEMP. +60FHeating Operation Modeonly Heating Model IndoorPipe Temp Rý uDefrost OFF Defrost onSetting TEMP. -1F Cooling or Heating Mode with Sleep Mode Auto ControlForced Operation Setting TempCrank Case Heater Coil Controlonly Heating model ICJOutdoor IndoorSelf-diagnosis Function Display FunctionBuzzer Sound DiagnosisIs toxic when burned InstallationWhen connecting refrigerant tubing When servicingSelection of the best location Roof Top InstallationsPiping length and the elevation Avoid areas where electrical wiring, conduits or Indoor Unit InstallationWire or gas line can cause death or injury Lower left and right side of Installation PlatePreparation of Pipings Piping and Drainage of Indoor UnitStarted Poo 113 H IW-0For right rear piping Connection of Pipings5kgm39.8ft.ibs LljFor the left pipings Tape the tubing, drain hose and the connecting Insert the connecting cable into the indoor unitIndoor unit installation Installation plate. Engage the two hooks of the rearDrain hose Taping Connecting the pipings to the Outdoor unit Connecting Pipings and the cable to Outdoor unitConnection of the cable 2sanoev Terminals and fasten the wire tightly with the fixing screwChecking the Drainage Attach the Grille onto the cabinet Connect the cable to the indoor unitForming the pipings BwidPage Page Settfemont of Outdoor Unit Temperature, Pressure, Ampere ChanEvaluation of theperformance MG OFF Timer Button Name and Function-Remote ControllerSleep Mode Auto Button Operation displayStart/Stop Button Qs Operation Mode Selection ButtonCooling & Heating Be careful not to lose the clip when reassem- blingRemove the securing screws To remove the Control BoxRemove 2 securing screws Page To remove the Control Box To remove the Grille from the ChassisTo remove the Evaporator To remove the Discharge GrilleRemove three screws fixing control box and motor Unhook the tab on the left inside edgeTo remove the Fan Motor To remove the Cross-Flow FanTrouble analysis Cycle Troubleshooting GuideCause of Trouble Connector related to CN-POWER Connector related to CN-FAN Turn off Main Power Cý After 10 secondsDisplay PWB Assy Check Connector related to CN-DC/DC Does beeping sound is made from the Indoor Unit?R751K C711000PF Micom PIN Check Receiver Assy Product Is not operate with the remote controllerCompressor/Outdoor Fan are unable to drive Turn on Main PowerWhen Indoor Fan does not operate When Vertical Louver does not operate Operation indicator of Indoor unit blinks five times When a comunication error occursIndoor Unit Phenomena in case of connecting errorCN-UP/DOWN CN-TH+0 , ý CN-POWER RY-COMPOutdoor Unit CN-TRANS CN-FANVoltage of Connectors according to Indoor Fan Speed Optional Function Electronic Control DeviceOptional Function Model Main PWB ASSYOutdoor Unit1OK LDt ftn 18k, 24kASM LD2 LD4Schematic Diagram Page BA ýJ Remote Controller Plate InstallationHeat OTY Remark Parts Name ControllerIndoor Unit18k, 24k Motor Assy Chassis Assy Parts NameTom, .ý M m mm 7DDD \ , \Base Weld ASM Condenser Compressor ASM 9k, 12kReversing Valve Reversing Coil Front Panel AssyTOP Cover ASM Rear Panel Barrier31 CAP Capillary Final ASM HEATERCRANK-CASE1 Heat QTY RemarkOutdoor Unit18k `Ty MSS-018A MSH-018A L8k171 PWB ASSY, Main SH-CAPACITOR Reversing Coil QTY RemarkClamp Capacitor Controller Assy Check Valve CAPILLARY, Bent 29 CAP CAPILLARY, Bent Panel Cover ControlPANEL, Rear 2021-0024ICJ No Remark R means service parts9O2k MSS-009B MSS-012B 2021-0001MSS-0188 MSH-018B Plate Installation Holder Tube Motor Assy Chassis Assy2021-0001 2021-0074 2010-0003 2021-0069 2021-0005 FAN Assy CrossGQ 21k Service VALVE1/4 Service VALVE112Capillary TOP Cover ASMFinal ASM HEATERCRANK-CASEReversing Valve High Pressure S/W2021-0024 I`J FAN MotorMSS-018A MSH-018A SAT City Remark Support Valve High Pressure S/W Reversing CoilPWBASSY,MAIN 2035-0004 2035-0006 UTY Remark2021-0021 2050-0001 Extra FAN Barrier ASMHeat CONTROLLER, INC