Sanyo XS1852, C1852, CL1852 service manual Poor Cooling, Excessive Cooling

Page 39

11.SERVICE PROCEDURES

9)Poor Cooling

Check installation position of remote control unit.

• Does cool air from air condi-

tioner reach remote control

unit directly ?

 

 

YES

Change installation

position of remote

 

 

control unit.

 

 

 

 

• Is wide tube between indoor unit

and outdoor unit insulated ?

YES

NO

Insulate wide tube and then execute taping with narrow tube.

Measure temperatures of suction and discharge air of indoor unit.

 

Temperature

 

 

 

 

difference

 

 

 

 

Possibility of

 

Charge

 

is small.

 

 

refrigerant

 

refrigerant

 

 

 

 

 

shortage.

 

(R22).

 

 

 

 

 

Temperature difference between suction and discharge air is

large enough (Approx. 10 deg. or more).

• Check clogging of air

 

 

 

 

filter.

Air filter is clogged.

 

 

 

 

 

 

 

 

 

YES

 

• Is fan speed set to LOW ?

 

 

 

 

 

 

 

 

 

 

 

• Review cooling load estimate, if performance of air conditioner is normal.

Clean filter.

Set fan speed to either HIGH or MEDIUM.

Reduce cooling load or replace the unit with higher cooling capacity.

1040_X_S

10) Excessive Cooling.

YES

• The set temperature is too low.

• Is the remote control unit installed

NO

 

 

at a place where it can

 

detect the room temperature

 

 

properly ?

 

 

 

 

 

Set the temperature to higher value using temperature setting button of the remote control unit.

Change installation position of the remote control unit.

0637_X_S

SM830079

– 39 –

Image 39
Contents Indoor Unit Outdoor Unit XS1852 C1852 Technical DataIf Necessary, Get Help Please Read Before StartingTable of Contents Introduction Read Me First Operating Range XS1852 / C1852XS1852 / CL1852 Unit Specifications SpecificationsData Subject to Change Without Notice Fan motor Major Component Specifications Indoor UnitCompressor Major Component Specifications Outdoor UnitModel No XS1852 Power Transformer Other Component Specifications Indoor UnitModel No CL1852 Other Component Specifications Outdoor UnitIndoor Unit XS1852 Dimensional DataOutdoor Unit C1852, CL1852 230V Performance ChartsModel XS1852 AIR Throw Distance ChartRefrigerant Flow Diagram Insulation of Refrigerant TubingTo prevent heat loss and wet floors due to dripping Tubing Length Installation InstructionsAvoid Selecting the Installation SiteÃInstall the outdoor unit Choose a place that is well ventilatedBaffle Plates for the Outdoor Unit CL×× models only Electrical Wiring General Precautions on Wiring Models Wiring System DiagramElectrical Data Electrical Wiring Diagrams Electric Wiring DiagramSchematic Diagram Outdoor Unit C1852 Outdoor Unit CL1852 Processes and Functions Room Temperature ControlDrain Pump Control Freeze PreventionMedium Service Procedures 1334XS There is a possibility of short circuit Check remote control unitCheck Operation selector switch in the indoor unit Transformer in indoor unitCheck. auxiliary relay FMI Check fuse on the P.C.B. Ass’y in the indoor unitCheck Cool / FAN selector switch in the remote control unit Check set temperatureOutdoor Unit does not Run Check compressor motor magnetic contactor Check float switch Refer to 11 Drain Pump ControlIndoor fan does not run Indoor Unit does not RunIndoor fan and louver motor do not run Some Part does not OperateOutdoor Fan does not Run Outdoor Fan does not Run for CL1852Compressor does not Run Excessive Cooling Poor CoolingOperation of Major Electrical Parts Room temp. Sensor in the remote control unit is defectiveMeasurement of Insulation Re- sistance for Electrical parts Power Supply WiresCompressor motor thermal protector . . . . . . Outdoor unit Checking the Protective DevicesMotor capacitor Both in indoor and outdoor unit Indoor fan motor FMI Indoor unit Measure the coil resistanceThermistor Characteristic Curve Continuity of fuse on P.C.B. Ass’yMethod Used to Replace Fuse on PCB Ass’y Central Region
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XS1852, CL1852, C1852 specifications

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