Sanyo
CH2472, CH1872
service manual
Appendix B Installation Instructions
Troubleshooting
Specifications
Electrical Characteristics
Install
Refrigerant Flow Diagram
Timer backup
Trical wiring or conduits are
Dimension
Maintenance
Self-diagnostics Lamps
Page 86
APPENDIX B INSTALLATION INSTRUCTIONS
KHS1872 + CH1872 KHS2472 + CH2472
(II-852-6-4189-989-00-3)
A-2
Page 85
Page 87
Image 86
Page 85
Page 87
Contents
DC Inverter Split System AIR Conditioner
Indoor Model No. Product Code No
Please Read Before Starting
Table of Contents
Checking Electrical Components
Operating Range
Indoor Air Intake Temp Outdoor Air Intake Temp
KHS1872
Specifications
Unit Specifications
CH1872
208V
KHS2472
CH2472
12.1 13.5
Major Component Specifications
Indoor Unit
CB-KHS2472 Microprocessor 250V 3A
Compressor
Outdoor Unit
Outdoor Unit CH1872
External Finish
Outdoor Unit CH2472
Compressor temp sensor
Other Component Specifications
Indoor heat exchanger sensor
Outdoor air temp sensor
Dimensional Data
Indoor Unit KHS1872
11-17/32 23-15/16
35-7/16900
Insulation of Refrigerant Tubing
Refrigerant Flow Diagram
Refrigerant Flow Diagram
After a tube has been insulated To break or crack
Operating current performance chart
Temperature Charts
Low pressure performance chart
Indoor discharge air performance chart
High pressure performance chart
Wide
73F
Power Supply 230V Single Phase 60Hz Cooling Capacity
Cooling Capacity
24,200 BTU/h
Cooling Capacity Low Ambient
Indoor Outdoor
24,200 BTU/h
TH Total Heating Capacity BTU/h
Power Supply 230V Single Phase 60Hz Heating Capacity
Heating Capacity
29,000 BTU/h
Room air temp F 26.7C Fan speed High Horizontal distance ft
Air Throw Distance Charts
Cooling Vertical distance ft
Heating Vertical distance ft
Heating
CH1872 Voltage230V Cooling
Electrical Characteristics
Electrical Data
Voltage208V Cooling
CH2472 Voltage230V Cooling
8FA2-5257-70500-0
Electric Wiring Diagrams
Indoor Unit KHS1872 KHS2472
WHT WHT
YEL YEL
Button Operation HR.TIMER button ACL Reset button
Maintenance
Address Setting of the Remote Control Unit
How to Disconnect
How to Connect
Emergency operation
Functions
Operation Functions
Auto cooling/heating operation
Timer backup
Lamp colors
Overload prevention during heating
Compressor discharge temperature control
Protective Functions
Freeze prevention
Reverse-Cycle Defrosting
Defrost detection and release
CT Peak current cut-off control
Method of Self-Diagnostics
Troubleshooting
Precautions before Performing Inspection or Repair
Self-diagnostics Lamps
Replace the circuit board or the fuse
Normal
Replace the controller
Checking the indoor unit Control Check items unit operation
Using the TEST/T-RUN terminals
Checking the Indoor and Outdoor Units
Before the Operation
Serial Communication Error Identification Procedure
Off Blinking Illuminated
Condition E01
Terminal board Outdoor Unit
Condition E12
Trouble Diagnosis of Fan Motor
Indoor Fan Motor
Outdoor Fan Motor
Electromagnetic interference
Noise Malfunction and Electromagnetic Interference
Noise malfunction
Locations most susceptible to noise Trouble Correction
Measurement of Insulation Resistance
Power Supply Cord
Checking Electrical Components
Measurement of Insulation Resistance for Electrical Parts
Checking Continuity of Fuse on PCB Assy
What is New Refrigerant R410A?
Refrigerant R410A Special Precautions When Servicing Unit
Characteristics of New Refrigerant R410A
Characteristics
Checklist before Servicing
Tubing Installation Procedures
Tools Specifically for R410A
Procedure for Replacing Compressor
Case of Compressor Malfunction
Damage to the compressor
Never charge a large amount
Unit. This may cause
Example
Recharging
Case Refrigerant is Leaking
Welding leaking points
Retro-Fitting Existing Systems
When Tubes are Extended
Charging Additional Refrigerant
Use of Existing Units
OI-852-6-4180-801-00-2
Features
Product Information
Contents
Alert Symbols
Electrical Requirements
Installation Location
Safety Instructions
Names of Parts
Unit Display and Operation Button
Quiet lamp
Remote Control Unit Display
Advance button
Remote Control Unit
HR. Timer button
Transmitter
Quiet button
FAN Speed selector button
How to Install Batteries
Using the Remote Control Unit
Temperature Display Selector
Button Time Display Selector button
Using the Remote Control Unit
Operation with the Remote Control Unit
Press the ON/OFF operation button
Press the TEMP. setting buttons to change the temperature
Operation with the Remote Control Unit
Press the Mode selector button and select the desired mode
Set the FAN Speed selector button to the setting you want
Adjusting the Fan Speed
Cooling and DRY Mode
Night Setback Mode is used for saving energy
Quiet Mode
Special Remarks
Operation Indication
Setting the Timer
Example To set to 1030 pm
To cancel a timer program Press the Cancel button
Setting the Timer
How to set the on time Example To start operation at 710 am
1030 pm 710 am 1100 am Present time
Cancellation procedure
Using the 1-Hour OFF Timer
Setting procedure
Operation together with the Daily ON/OFF Repeat Timer
Horizontal
Adjusting the Airflow Direction
Setting the airflow manually
Sweep function
When the air conditioner is not running
Operation without the Remote Control Unit
Care and Cleaning
Grasp both ends of the air
Care and Cleaning
Cleaning
Intake grille
Follow the steps below when the generator has become dirty
Negative ion generator metal electrodes inside plastic case
Trouble Possible Cause Remedy
Troubleshooting
Operating Range
Max DB / 71 F WB Min DB / 57 F WB
Appendix B Installation Instructions
Installation Instructions
Contents
Please Read Before Starting
General
Tools Required for Installation not supplied
Accessories Supplied with Unit Table
Optional Copper Tubing Kit
Installation Site Selection
Additional Materials Required for Installation
Solid base must not cover the hole of the bottom plate
Remove the Rear Panel from the Unit
How to Install the Indoor Unit
Trical wiring or conduits are
Make a Hole
If Block, Brick, Concrete or Similar Type Wall
Install the Rear Panel on the Wall
If Wooden Wall
How to replace the grille
Remove the Grille to Install the Indoor Unit
How to remove the grille
Wiring Instructions General precautions on wiring
Shape the Indoor Side Tubing
Recommended Wire Length and Diameter
AWG
Wiring Instructions for Inter-unit Connections
For stranded wiring
How to connect wiring to the terminal For Indoor Unit
For Outdoor Unit For solid core wiring or F-cable
Mounting
Right-side tubing
Drain cap
Switching drain hose and drain cap
Left-side tubing
To unmount indoor unit
Do not supply power to
Tubing and wiring to the out
Unit or operate it until all
Wiring Instructions for the Outdoor Unit
How to Install the Outdoor Unit
First refer to . Installation Site Selection
Refrigerant Tubing
Flaring Procedure with a Flare Tool
To 0.5 mm Adjust so that the amount of tube
Use of the Flaring Method
Insulation of Refrigerant Tubing
Connecting Tubing between Indoor and Outdoor Units
Finishing the Installation
To prevent heat loss and wet floors due to dripping of con
Air Purging
Attempting to turn the valve
Be sure to completely insert
Hex wrench before
How to Test Run the Air Conditioner
Stem, use the accessory
Basic Functions of the Service Valves
When opening or clos Ing the service valve
Pump Down
Remote Control Unit Installation Position
Mounting on a Wall
Address Switch
Address Setting of the Remote Control Unit
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