(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.

45

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