Sanyo KS0971 Service Manual

10-3. Checking the Indoor and Outdoor Units
(1) Checking the indoor unit
(2) Checking the outdoor unit
(3) Checking the serial communications
Using the TEST/T-RUN terminals
ControlNo. Check items (unit operation)
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).
Use the remote controller to operate the
unit in "TEST run" mode. To determine
whether the mode is currently in
"TEST run" mode, check the 4 indicator
lamps on the unit. If all 4 are blinking,
the current mode is "TEST run."
If there are no problems with the above, then check the outdoor unit.
1
The rated voltage must be present between inter-unit wirings 1 and 2.
Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When the
voltage at both ends is measured, approximately 12 to 15V DC must
be output and the multimeter pointer must bounce once every 8
seconds.
Or instead of measuring the voltage, you can insert an LED jig and
check that the LED flickers once every 8 seconds.
•
•
ControlNo. Check items (unit operation)
Apply the rated voltage between outdoor
unit terminals L and N.
If there are no problems with the above, then check the indoor unit.
Tu rn the power OFF before performing short circuiting procedures.
Refer to the previous pages when performing system self-diagnostics.
So that the check can be made quickly, indicators blink at first communication after power ON.
Before performing the above checks, perform “TEST run” operation, and check that the rated voltage is output to terminals L and N
on the outdoor unit. If it is not output, there is a failure related to the indoor unit power.
1 The control panel LED (red) must illuminate.
Short-circuit the outdoor unit COM terminal
to the T-RUN terminal.
2 The compressor and fan motor must all turn on.
•
•
TEST/T-RUN terminals
(TEST)/MV T-RUN COM
For the "Test run" procedure, refer to 7.4" How to Test Run the Air Conditioner".
Probable location of malfunction
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
Short-circuit terminals 2 and 3 on
the outdoor unit terminal plate.
Short-circuit terminals 2 and 3 on
the indoor unit terminal plate.
Initial self-diagnostics
Control 1 Control 2
....
OFF
....
Blinking
....
Illuminated
Quiet
( 3 )
Timer
( 2 )
Operation
( 1 )
Quiet
( 3 )
Timer
( 2 )
Operation
( 1 )
Quiet
( 3 )
Timer
( 2 )
Operation
( 1 )
45

Sanyo KS0971 Specifications

General

Brand	Sanyo
Model	KS0971
Category	Air Conditioner
Language	English

Summary

Important Safety Precautions

Safe Installation and Operation Guidelines

Key steps for safe installation, operation, and adherence to codes.

Warning and Caution Symbols Explained

Wiring Safety Precautions

Critical safety warnings for electrical wiring, emphasizing qualified personnel.

Unit Specifications Overview

Unit Specifications Details

Detailed specifications for indoor and outdoor units, including performance and electrical ratings.

Major Component Specifications

Indoor Unit Component Details

Major Component Specifications for Outdoor Unit

Outdoor Unit Component Details

Refrigerant Flow Diagram and Tubing Insulation

Performance Data: Temperature Charts

Cooling Characteristics Charts

Electrical Characteristics

Electrical Characteristics Details

Electric Wiring Diagrams: Indoor Unit

Electric Wiring Diagrams: Outdoor Unit C0971

Electric Wiring Diagrams: Outdoor Unit C1271

Installation Site Selection

Indoor Unit Installation Site Selection

Outdoor Unit Installation Site Selection

Recommended Wire Length and Diameter

Remote Control Unit Installation Position

How to Test Run the Air Conditioner

Indoor Unit Grille Removal and Installation

Functions

Protective Functions

Troubleshooting Precautions and Self-Diagnostics

Performing Self-Diagnostics

Procedure for executing the unit's self-diagnostic function for troubleshooting.

Checking Indoor and Outdoor Units

Outdoor Fan Motor Trouble Diagnosis

Measurement of Insulation Resistance

Fuse Continuity Check on PCB Assembly

Refrigerant R410A: Special Servicing Precautions

Characteristics of New Refrigerant R410A

Details on the properties, components, and characteristics of R410A refrigerant.

Pre-Servicing Checklist for R410A

Tools Specifically for R410A Servicing

Compressor Malfunction Procedures

Refrigerant Leak Detection and Repair

Charging Additional Refrigerant and Retro-Fitting

Installation Location Guidelines

Remote Control Unit Components

Remote Control Unit Button Functions

Using the Remote Control Unit

Basic Operation with Remote Control

Setting the Timer: Present and OFF Time

Setting ON Time and Repeat Timers

Adjusting Airflow Direction

Care and Cleaning Precautions

Troubleshooting Common Issues