Sanyo CL2462R, C2462R service manual Refrigerant R410A Special Precautions When Installing Unit

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12.SERVICE PROCEDURES

11.REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN INSTALLING UNIT

11-1. Characteristics of New Refrigerant R410A

11-1-1. What is New Refrigerant R410A?

R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture which do not adversely affect the earth’s ozone layer. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.

11-1-2. Components (mixing proportions)

HFC32 (50%) / HFC125 (50%)

11-1-3. Characteristics

Less toxic, more chemically stable refrigerant

The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).

When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state.

Thus, always charge the refrigerant while it is in liquid phase.

CAUTION

Ether-type oil is used for compressor oil for R410A-type units, which is different from the mineral oil used for R22. Thus more attention to moisture prevention and faster replacement work compared with conventional models are required.

11-2. Checklist Before Installation

Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of protrusion).

Diameter of tube (ø) D

 

A Specification

 

 

 

Flare tool for R410A

 

Conventional flare tool (for R22)

 

 

 

 

 

 

ø6.35 (1/4")

0 – 0.5 mm

 

1.0 – 1.5 mm

 

 

 

 

ø19.05 (3/4")

0 – 0.5 mm

 

1.0 – 1.5 mm

 

 

 

 

Size of flare

D

D

 

A

A

Flare tool for R410A

Conventional flare tool (R22)

Flare nut: Because the new refrigerant R410A operates at 1.6 times higher pressure than the conventional refrigerant R22, the flare nuts that came with the unit must be used.

SM830092

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Contents Indoor Unit Outdoor Unit KS2462R C2462R CL2462R Technical Data…In a Room Please Read Before Starting…In Moist or Uneven Locations Table of Contents KS2462R / C2462R Operating RangeKS2462R / CL2462R Unit Specifications SpecificationsIndoor Unit KS2462R Outdoor Unit CL2462R Major Component Specifications Indoor Unit Major Component Specifications Outdoor Unit Controller P.C.B. Assy Model No CL2462R SourceHeat exchange Lamp Assy Other Component Specifications Indoor UnitModel No KS2462R Power Transformer Thermistor Coil sensorThermostat Coil sensor Other Component Specifications Outdoor UnitPower Relay Model No C2462RSolenoid control valve or coil Model No CL2462RIndoor Unit KS2462R Dimensional DataOutdoor Unit C2462R, CL2462R Indoor Unit KS2462R Outdoor Unit C2462R Cooling Capacity208V / 1 phase / 60Hz 208V Performance ChartsOperating Current Indoor Unit KS2462R 230VOutdoor Unit CL2462R Low Pressure High and Low Pressure Indoor Unit KS2462RHigh Pressure 230V / 208230 Horizontal distance ft AIR Throw Distance ChartHgbv Refrigerant Flow DiagramTubing Length Installation InstructionsC2462R, CL2462R 132 For stable operation Selecting the Installation SiteAir conditioner, do Air discharge chamber for top discharge Recommended outer dimensions of wind shield field supply Electrical Wiring General Precautions on Wiring Models Wiring System DiagramElectrical Data Electrical Wiring Diagrams Electric Wiring DiagramElectric Wiring Diagram Schematic Diagram Controller CR-CL2432 CL2462R Outdoor UnitOutdoor Unit CL2462R Schematic DiagramProcesses and Functions Room Temperature ControlCooling operation Dry a zone Dry Operation DehumidificationFreeze Prevention CL2462R Type Outdoor Fan Speed Control C2462R TypeService Procedures 1032XS There is a possibility of short circuit Check remote control unitCheck compressor motor protectors High pressure switch 63PH Check Operation selector switch in the indoor unitTransformer in indoor unit Check fuse on the P.C.B. Ass’y in the indoor unit Check. auxiliary relay Y or 2YCheck set temperature Check Cool / FAN selector switch in the remote control unitOutdoor Unit does not Run Check indoor unit P.C.B Check compressor motor magnetic contactorCheck outdoor unit P.C.B. CL2462R Type Flap motor does not run Indoor Unit does not RunIndoor fan and flap motor do not run Some Part does not Operate. A. Indoor fan does not runOutdoor Fan does not Run Compressor does not Run Outdoor Fan does not Run for CL2462RExcessive Cooling Poor CoolingRoom temp. Sensor in the remote control unit is defective Measurement 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 resistanceContinuity of fuse on P.C.B. Ass’y Check for continuity using a multim- eter as shown in FigMethod Used to Replace Fuse on PCB Ass’y Refrigerant R410A Special Precautions When Installing Unit No addition of compressor oil for R410A Gauge manifold

C2462R, CL2462R specifications

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