Sanyo SAP-KRV94EHDX service manual Checking the Indoor and Outdoor Units

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(2)If the self-diagnostics function fails to operate

Check the indoor unit.

Is the fuse blown?

Normal

Replace the controller.

No indicators illuminate and the indoor fan does not rotate.

Check the power voltage.

Blown

Replace the circuit board or the fuse.

10-3. Checking the Indoor and Outdoor Units

(1) Checking the indoor unit

No.

Control

Check items (unit operation)

 

 

 

1

Press EMERGENCY OPERATION button

The rated voltage must be present between inter-unit wirings 1 and 2.

 

of main unit controller, or start operation

Connect a 5 kohm resistor between inter-unit cables 2 and 3. When the

 

using the remote controller.

voltage at both ends is measured, approximately 12 to 15 V DC must

2

 

be output and the multimeter pointer must bounce once every 8

Press and hold the TEST RUN button

seconds.

 

on the main unit controller until the buzzer

Or instead of measuring the voltage, you can insert an LED jig and

 

sounds 1 time.

check that the LED flickers once every 8 seconds.

 

 

 

If there are no problems with the above, then check the outdoor unit.

(2) Checking the outdoor unit

No.

Control

Check items (unit operation)

 

 

 

1

Apply the rated voltage between outdoor

The control panel LED (red) must illuminate.

 

unit terminals 1 and 2.

 

 

 

 

2

Short-circuit the outdoor unit COM terminal

The compressor and fan motor must turn ON about 5 seconds later

 

to the T-RUN terminal.

after the terminals are shorted.

 

 

 

If there are no problems with the above, then check the indoor unit.

TEST/MV T-RUN terminals

Using the TEST/T-RUN terminals

T-RUN : Test run (compressor and fan motor turn ON).

TEST/MV : Compresses time to 1/60th (accelerates operation by 60 times faster than normal). Fully opens the electric expansion valve.

Circuit board

TEST/MV T-RUN COM

(3) Checking the serial communications

 

 

Control 1

 

Control 2

 

.... OFF

.... Blinking

.... Illuminated

Initial self-diagnostics

Short-circuit terminals 2 and 3 on

Short-circuit terminals 2 and 3 on

 

 

the indoor unit terminal plate.

the outdoor unit terminal plate.

 

 

 

 

 

Probable location of malfunction

Ion

Timer

Operation

Ion

Timer

Operation

Ion

Timer

Operation

 

 

( 3 )

( 2 )

( 1 )

( 3 )

( 2 )

( 1 )

( 3 )

( 2 )

( 1 )

 

 

 

 

 

 

 

 

 

 

 

Indoor unit circuit board failure

 

 

 

 

 

 

 

 

 

Outdoor unit circuit board failure

 

 

 

 

 

 

 

 

 

Failure (open circuit, contact failure, etc.)

 

 

 

 

 

 

 

 

 

in the inter-unit wirings

 

 

 

 

 

 

 

 

 

 

Outdoor unit circuit board failure

Turn the power OFF before performing short circuiting work.

During the self-diagnostics check, the check results are the first indication when the TEST RUN button is pressed until the buzzer sounds 1 time, after the power supply is ON.

So that the check can be made quickly, indicators blink at first communication after power ON.

Before performing the above checks, press the ON/OFF operation button of indoor unit or remote controller to operate the air conditioner, and check that AC 220 to 240V is output to terminals 1 and 2. If it is not output, there is a failure related to the indoor unit power.

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Contents DC Inverter Split System AIR Conditioner Table of Contents Checking Electrical Components Please Read Before Starting For safe installation and trouble-free operation, you MustOperating Range Indoor Unit SAP-KRV94EHDX Unit SpecificationsOutdoor Unit SAP-CRV124EHDX SAP-KRV124EHDXSAP-KRV94EHDX Major Component SpecificationsCB-KRV124EHDX Outdoor Unit CB-CRV124EHDX Other Component Specifications Dimensional Data Dia .35 1/4 Refrigerant Flow Diagram Refrigerant Flow DiagramInsulation of Refrigerant Tubing Indoor Unit SAP-KRV94EHDX Outdoor Unit SAP-CRV94EHDXPerformance Data Temperature ChartsIndoor Unit SAP-KRV124EHDX Outdoor Unit SAP-CRV124EHDX Air Throw Distance Charts Indoor Unit SAP-KRV124EHDX Electrical Characteristics CoolingHeating Electric Wiring Diagrams Outdoor Unit Indoor UnitSAP-CRV94EHDX SAP-KRV94EHDX SAP-CRV124EHDX SAP-KRV124EHDX Installation Site Selection About Wiring System Diagram Recommended Wire Length and DiameterMounting on a Wall Remote Control Unit Installation PositionON/OFF How to Test Run the Air ConditionerRemove the Grille to Install the Indoor Unit How to remove the grilleHow to replace the grille Maintenance Address Setting of the Remote Control UnitSwitching the remote controller address Removing and Mounting the Drain Hose Removing the Electrical Component Box Page Removing the Panel Motor Removing the Drain Pan Air Outlet Assy Removing and Mounting the Drain Pan Air Outlet AssyWater in the drain pan Mounting the Drain Pan Air Outlet AssyRemoving the Negative Ion Generator Removing and Mounting the Fan Motor Removing the Fan MotorMounting the Fan Motor Removing the Fan How to Connect How to DisconnectOperation Functions FunctionsEmergency operation Auto cooling/heating operationLamp colors Timer backupProtective Functions Compressor discharge temperature controlOverload prevention during heating Freeze preventionMode Cooling Mode HeatingNon-Stop Defrosting Troubleshooting Precautions before Performing Inspection or RepairMethod of Self-Diagnostics ION Timer Operation Self-diagnostics LampsChecking the Indoor and Outdoor Units Diagnostic results Diagnostic procedureRemedy for symptom 3 to Trouble Diagnosis of Indoor and Outdoor Fan MotorOutdoor Fan Motor Noise Malfunction and Electromagnetic Interference Noise malfunctionElectromagnetic interference Upper right screw Grille Screw Flap Screw cover Making a Diagnosis of the Panel Motor Measurement of Insulation Resistance Checking Electrical ComponentsChecking Continuity of Fuse on PCB Assy Characteristics of New Refrigerant R410A Refrigerant R410A Special Precautions When Servicing UnitChecklist before Servicing Size of flareNo addition of compressor oil for R410A Tubing precautionsNo use of refrigerant other than R410A If refrigerant R410A is exposed to fireTools Specifically for R410A Tubing Installation ProceduresFor servicing, use the following tools for R410A Tool Distinction Tool NameCase of Compressor Malfunction Procedure for Replacing CompressorRecharging Configuration and characteristics of cylindersNever charge a large amount Unit. This may causeWelding leaking points Case Refrigerant is LeakingCharging Additional Refrigerant When Tubes are ExtendedRetro-Fitting Existing Systems Use of Existing UnitsOI-852-6-4180-791-00-0 Child Lock FeaturesContents Alert SymbolsProduct Information Installation Location Safety InstructionsElectrical Requirements Names of Parts Unit Display and Operation Button Remote Control Unit Display Remote Control Unit Heat AutoDRY CoolONE TIME/EVERYDAY Using the Remote Control UnitUsing the Remote Control Unit Remote control unit mount Mounting screws 4 x 16 includedControl Unit Step Operation with the Remote Control UnitStep Press the ON/OFF operation buttonCover closed Cover opened Step Operation with the Remote Control UnitAdjusting the Fan Speed Night Setback Mode is used for saving energy Cooling and DRY ModeSetting Setting TemperatureQuiet Mode Special Remarks Setting the Timer Example To set toOperation Indication To cancel a timer program Press the Cancel button Setting the Timer2230 610 2000 Present time OFFSetting procedure Using the 1.2.3.5-Hour OFF TimerCancellation procedure Operation together with the Daily ON/OFF Repeat TimerAdjusting the Airflow Direction SweepFAN Heat Indoor Unit Care and CleaningHow to replace the anti-mold Care and CleaningRemounting the front panel FilterNegative ion generator metal electrodes inside plastic case How to clean the air clean filterTroubleshooting Operating RangeTrouble Possible Cause Remedy Osaka, Japan Sept

SAP-KRV94EHDX specifications

The Sanyo SAP-KRV94EHDX is a cutting-edge split-type air conditioning unit that exemplifies advanced technology and efficiency. Designed for both residential and commercial spaces, this model is equipped with features that cater to various cooling and heating needs.

One of the main highlights of the Sanyo SAP-KRV94EHDX is its energy efficiency. With a high Energy Efficiency Ratio (EER), this unit minimizes energy consumption while maximizing cooling performance. This not only results in lower electricity bills but also contributes to a reduced carbon footprint, making it an environmentally friendly choice for users.

The SAP-KRV94EHDX employs inverter technology, which allows the compressor to adjust its speed dynamically based on the temperature requirements of the environment. This means that the unit operates more quietly and uses less energy when maintaining a consistent temperature. The inverter system ensures that the air conditioner can quickly reach the desired cooling or heating temperature and maintain it without the frequent on-off cycles typical of traditional units.

Additionally, the air conditioning unit comes with a powerful cooling capacity, effectively managing larger spaces. It can easily handle varying ambient conditions while providing rapid cooling in extremely warm weather, making it perfect for areas with hot climates.

Other notable features include a user-friendly remote control, allowing users to adjust settings from a distance effortlessly. The unit also incorporates a multi-stage air filtration system designed to remove dust, allergens, and other airborne particles, contributing to better indoor air quality.

The Sanyo SAP-KRV94EHDX is not just about functionality; it also boasts a sleek and modern design that blends seamlessly with various interior aesthetics. Its quiet operation ensures that it does not disturb daily activities, making it suitable for bedrooms, offices, and living spaces.

Moreover, the unit comes with various operational modes, including cooling, dehumidification, and a heating function. This versatility makes the SAP-KRV94EHDX an all-season solution for climate control.

In summary, the Sanyo SAP-KRV94EHDX is a top-tier air conditioning unit that combines efficiency, advanced technology, and user convenience. Its inverter technology, multi-stage air filtration, and modern design make it a reliable choice for anyone seeking comfort throughout the year.
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