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Sanyo CH1872 Technical & Service Manual

Dc inverter split system air conditioner
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Table of Contents
TECHNICAL & SERVICE MANUAL
KHS1872 + CH1872
KHS2472 + CH2472
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No.
KHS1872
KHS2472
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
Product Code No.
1 852 099 85
1 852 099 86
Indoor Unit
KHS1872
KHS2472
Outdoor Model No.
Product Code No.
CH1872
1 852 330 38
CH2472
1 852 330 39
Outdoor Unit
CH1872
CH2472
REFERENCE NO.
FILE NO.
Destination: North America
SM
700656-05

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  • Page 1 TECHNICAL & SERVICE MANUAL KHS1872 + CH1872 KHS2472 + CH2472 DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No. KHS1872 KHS2472 Indoor Unit KHS1872 KHS2472 IMPORTANT These air conditioners employ new refrigerant R410A. Pay special attention when servicing the unit.
  • Page 2 Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers. When Installing In a Ceiling or Wall Make sure the ceiling/wall is strong enough to hold the unit’s...
  • Page 3: Table Of Contents

    1. OPERATING RANGE 2. SPECIFICATIONS 2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications 3. DIMENSIONAL DATA 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram 5. PERFORMANCE DATA 5-1. Temperature Charts 5-2. Cooling Capacity 5-3. Cooling Capacity (Low Ambient) 5-4.
  • Page 4 10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance 10-2. Checking Continuity of Fuse on PCB Ass'y 11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11-1. Characteristics of New Refrigerant R410A 11-2. Checklist before Servicing 11-3. Tools Specifically for R410A 11-4.
  • Page 5: Operating Range

    1. OPERATING RANGE Temperature Maximum Cooling Minimum Maximum Heating Minimum Indoor Air Intake Temp. Outdoor Air Intake Temp. 95 °F D.B. / 71 °F W.B. 115 °F D.B. 67 °F D.B. / 57 °F W.B. 0 °F D.B. 80 °F D.B. / 67 °F W.B. 75 °F D.B.
  • Page 6: Specifications

    2. SPECIFICATIONS 2-1. Unit Specifications KHS1872 Indoor Unit CH1872 Outdoor Unit Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Moisture Removal (High) Available Voltage Range Running Amperes Power Input Power Factor SEER HSPF Compressor Locked Rotor Amperes...
  • Page 7 KHS1872 Indoor Unit CH1872 Outdoor Unit Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Moisture Removal (High) Available Voltage Range Running Amperes Power Input Power Factor SEER HSPF Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity...
  • Page 8 KHS2472 Indoor Unit CH2472 Outdoor Unit Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Moisture Removal (High) Available Voltage Range Running Amperes Power Input Power Factor SEER HSPF Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Controls / Temperature Control Control Unit Timer...
  • Page 9 KHS2472 Indoor Unit CH2472 Outdoor Unit Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Moisture Removal (High) Available Voltage Range Running Amperes Power Input Power Factor SEER HSPF Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Controls / Temperature Control Control Unit Timer...
  • Page 10: Major Component Specifications

    2-2. Major Component Specifications 2-2-1. Indoor Unit KHS1872 Indoor Unit Control PCB Part No. Controls Control Circuit Fuse Remote Control Unit Type Q'ty ... Dia. and Length Fan Motor Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool / Heat) Nominal Output Coil Resistance (Ambient Temp.
  • Page 11 KHS2472 Indoor Unit Control PCB Part No. Controls Control Circuit Fuse Remote Control Unit Type Q'ty ... Dia. and Length Fan Motor Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool / Heat) Nominal Output Coil Resistance (Ambient Temp. 68 °F (20 °C)) Safety Device Type Over-Current Protection...
  • Page 12 2-2-2. Outdoor Unit CH1872 Outdoor Unit Control PCB Part No. Controls Control Circuit Fuse Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C)) Safety Device CT (Peak current cut-off control) Compressor Discharge Temp.
  • Page 13 CH2472 Outdoor Unit Control PCB Part No. Controls Control Circuit Fuse Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C)) Safety Device CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp.
  • Page 14: Other Component Specifications

    2-3. Other Component Specifications KHS1872 Indoor Unit KHS2472 Outdoor Unit CH1872 CH2472 • Indoor air temp sensor (Model:PTM-D51H-S3-2 TH2) (10) (15) (20) (25) (30) (35) (40) Temperature • Indoor heat exchanger sensor (Model:PTM-D51H-S3-2 TH1) • Compressor temp sensor (Model:TKS293B) 32 50 68 86 104 122 140 158 176 194 (0) (10) (20) (30) (40) (50) (60) (70) (80) (90) °F...
  • Page 15: Dimensional Data

    3. DIMENSIONAL DATA KHS1872 Indoor Unit KHS2472 Unit: inch(mm)
  • Page 16 Outdoor Unit CH1872 23-15/16 11-17/32 34-21/32(880) 5-11/32 15/32 2-17/32 1-13/16 2-13/32 Wide tube service valve dia.1/2" (12.70) Narrow tube service valve dia.1/4" (6.35) 3/32 5-23/32 Unit: inch(mm)
  • Page 17 Outdoor Unit CH2472 23-15/16 11-17/32 35-7/16(900) 5-11/32 15/32 2-15/16 1-21/32 2-7/8 Narrow tube service valve dia.1/4" (6.35) Wide tube service valve dia.5/8" (15.88) 2-1/32 4-1/2 Unit: inch(mm)
  • Page 18: Refrigerant Flow Diagram

    IMPORTANT Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material.
  • Page 19: Performance Data

    5. PERFORMANCE DATA 5-1. Temperature Charts KHS1872 Indoor Unit Outdoor Unit CH1872 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) (1) Low pressure performance chart (1.2) (1.1) (1.0) (0.9) (0.8) (0.7) (0.6) (0.5) (-20) (-15)
  • Page 20 • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. • Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "8-2. Overload prevention during heating.") (3.4)
  • Page 21 KHS2472 Indoor Unit Outdoor Unit CH2472 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) (1) Low pressure performance chart (1.2) (1.1) (1.0) (0.9) (0.8) (0.7) (0.6) (0.5) (-20) (-15) (-10) (2) Operating current performance chart (-20) (-15) (-10)
  • Page 22 • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. • Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "8-2. Overload prevention during heating.") (3.4)
  • Page 23: Cooling Capacity

    5-2. Cooling Capacity : KHS1872 Indoor Unit Outdoor Unit : CH1872 Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: INDOOR ENT. TEMP. W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9) 88 (31.1) 72 (22.2)
  • Page 24 : KHS2472 Indoor Unit Outdoor Unit : CH2472 Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: INDOOR ENT. TEMP. W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9) 88 (31.1) 72 (22.2) 76 (24.4) (17.2) 80 (26.7) 84 (28.9)
  • Page 25: Cooling Capacity (Low Ambient)

    5-3. Cooling Capacity (Low Ambient) : KHS1872 Indoor Unit Outdoor Unit : CH1872 Power Supply : 230V Single Phase 60Hz < Cooling Capacity (Low Ambient) > RATING CAPACITY: INDOOR ENT. TEMP. W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9)
  • Page 26 : KHS2472 Indoor Unit Outdoor Unit : CH2472 Power Supply : 230V Single Phase 60Hz < Cooling Capacity (Low Ambient) > RATING CAPACITY: INDOOR ENT. TEMP. W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9) 88 (31.1) 72 (22.2) 76 (24.4) (17.2) 80 (26.7)
  • Page 27: Heating Capacity

    5-4. Heating Capacity : KHS1872 Indoor Unit Outdoor Unit : CH1872 Power Supply : 230V Single Phase 60Hz < Heating Capacity > RATING CAPACITY: OUTDOOR ENT. TEMP. W.B. 0 (-17.8) 3 (-16.1) 8 (-13.3) 13 (-10.6) 18 (-7.8) 23 (-5.0) 28 (-2.2)
  • Page 28 : KHS2472 Indoor Unit Outdoor Unit : CH2472 Power Supply : 230V Single Phase 60Hz < Heating Capacity > RATING CAPACITY: OUTDOOR ENT. TEMP. W.B. 0 (-17.8) 3 (-16.1) 8 (-13.3) 13 (-10.6) 18 (-7.8) 23 (-5.0) 28 (-2.2) 33 (0.6) 38 (3.3) 43 (6.1) 48 (8.9)
  • Page 29: Air Throw Distance Charts

    5-5. Air Throw Distance Charts KHS1872 Indoor Unit Room air temp. : Cooling Fan speed Room air temp. : Heating Fan speed 80°F (26.7°C) High Horizontal distance (ft.) : Flap angle 0 , : Axis air velocity 0 : Flap angle 0 , : Axis air velocity 0 : Flap angle 30 , : Axis air velocity 30...
  • Page 30 KHS2472 Indoor Unit Room air temp. : Cooling Fan speed Room air temp. : Heating Fan speed 80 °F (26.7 °C ) High Horizontal distance (ft.) : Flap angle 0 , : Axis air velocity 0 : Flap angle 0 , : Axis air velocity 0 : Flap angle 30 , : Axis air velocity 30...
  • Page 31: Electrical Data

    6. ELECTRICAL DATA 6-1. Electrical Characteristics KHS1872 Indoor Unit Outdoor Unit CH1872 (1) Voltage:230V Cooling Performance at Rating conditions Running amp. Power input Rating conditions: Indoor air temperature: Outdoor air temperature: Heating Performance at Rating conditions Running amp. Power input...
  • Page 32 KHS2472 Indoor Unit Outdoor Unit CH2472 (1) Voltage:230V Cooling Performance at Rating conditions Running amp. Power input Rating conditions: Indoor air temperature: Outdoor air temperature: Heating Performance at Rating conditions Running amp. Power input Rating conditions: Indoor air temperature Outdoor air temperature (2) Voltage:208V Cooling Performance at...
  • Page 33: Electric Wiring Diagrams

    6-2. Electric Wiring Diagrams KHS1872 KHS2472 Indoor Unit EVAPORATOR CONNECTOR FLAP FLAP MOTOR FAN MOTOR To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts. AC1 AC2 SI FLAP 5P (WHT) LAMP 10P( WHT ) CONTROLLER...
  • Page 34 Outdoor Unit CH1872 REACTANCE COMP A-TH 1 2 3 4 1 2 3 4 1 2 3 OVERLOAD RELAY COMPRESSOR (OLR) MOTOR To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts.
  • Page 35 Outdoor Unit CH2472 REACTANCE 1P-CONNECTOR ( WHT ) 1P-CONNECTOR ( WHT ) HEATER1 HEATER0 CRANKCASE HEATER COMP A-TH 1 2 3 4 1 2 3 4 1 2 3 OVERLOAD RELAY COMPRESSOR (OLR) MOTOR To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts.
  • Page 36: Maintenance

    NOTE Once changed, you cannot restore the original address setting of the air conditioner. (1) Switch on the power source. (2) Break the address-setting tab marked "A" on the second remote controller to change the address (Fig.
  • Page 37: Disconnecting And Connecting Positive Connector For Outdoor Unit

    7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit Pull the cover upward When the cover is pulled upward, the lock is released with the sequence of 1 and 2. One of the two types of connectors illustrated at left is used. Their basic structure is the same for each.
  • Page 38: Functions

    8. FUNCTIONS 8-1. Operation Functions Emergency operation Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used. To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display. Each time this button is pressed, the OPERATION lamp changes color to indicate the type of operation.
  • Page 39: Night Setback

    The main unit display lamp also becomes dimmer. COOL and DRY modes When the night setback mode is selected, the air conditioner automatically raises the temperature setting 2°F(1°C) when 30 minutes have passed after the selection was made, and then another 2°F(1°C) after another 30 minutes have passed,...
  • Page 40: Protective Functions

    Area: Further frequency increase is prohibited. When the temperature falls below Point B, prevention of a rise in frequency is released and the air conditioner operates as in area. The compressor will stop if the temperature of the compressor discharge exceeds 248°F(120°C) due to shortage of gas or...
  • Page 41: Defrost Detection And Release

    2 minutes after it is stopped, compressor is ON. 4-way valve is ON. Outdoor fan is ON. NOTE If the air conditioner is turned off during the defrosting cycle, it will continue defrosting and turn itself off after defrosting is completed.
  • Page 42: Troubleshooting

    Follow the procedure below to perform diagnostics. PROCEDURE After turning on power to the air conditioner, use the remote controller and follow the steps below to execute self-diagnostics. Step 1: Press and hold the remote controller ION button and 1 HR TIMER button.
  • Page 43: Self-Diagnostics Lamps

    (1) Self-diagnostics Lamps INDOOR UNIT Since the indications cover various units, the corresponding parts listed below may not be present in some models. Indication on indoor unit Quiet Timer Operation Code REMOTE CONTROL receiver ... OFF Diagnostics items Room temperature sensor failure (1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location Indoor heat exchanger sensor failure...
  • Page 44 (2) If the self-diagnostics function fails to operate No indicators illuminate and the Check the indoor unit. indoor fan does not rotate. Check the power voltage. Blown Is the fuse blown? Normal Replace the circuit board or the fuse. Replace the controller.
  • Page 45: Checking The Indoor And Outdoor Units

    9-3. Checking the Indoor and Outdoor Units (1) Checking the indoor unit Control 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.
  • Page 46 (3) Serial Communication Error Identification Procedure If the lamps on the main body show the following conditions after the completion of self-diagnostics, a communication error between the indoor unit and outdoor unit might be considered. In such a case, identify the breakdown section by using the following procedure. NOTE Refer to "Method of Self-Diagnostics"...
  • Page 47 ( Continued from the previous page A. ) 1. Turn OFF the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF. 2. Short-circuit between the terminals 2 and 3 on the outdoor unit terminal strip. 1.
  • Page 48 (3-2) Condition: E12 Troubleshooting Serial Communication 1. Turn off the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF. 2. Disconnect the cable from the terminal 3 on the Outdoor unit terminal strip. 1.
  • Page 49: Trouble Diagnosis Of Fan Motor

    DC motor will trip and voltage output will stop approximately 1 minute after operation is started. For this reason, to measure the voltage again, turn OFF the unit once using the remote controller, and then start the air conditioner again. [Trouble symptom 1] The fan does not stop when the unit stops.
  • Page 50: Outdoor Fan Motor

    All of the above measured values are normal. Any one of the above measured values is not normal. (Reference) DC motor connector pin arrangement CH1872 Pin 1: Vs (white) Pin 2: Not used Pin 3: Not used Pin 4: Gnd (black)
  • Page 51: Noise Malfunction And Electromagnetic Interference

    9-5. Noise Malfunction and Electromagnetic Interference An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur.
  • Page 52: Checking Electrical Components

    10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 1M ohm. 10-1-1. Power Supply Cord Clamp the grounding wire of power cord with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power wires.
  • Page 53: Checking Continuity Of Fuse On Pcb Ass'y

    10-2. Checking Continuity of Fuse on PCB Ass'y Remove the PCB Ass'y from the electrical component box. Then pull out the fuse from the PCB Ass'y. (Fig. 5) Check for continuity using a multimeter as shown in Fig. 6. Fuse Fig.
  • Page 54: Refrigerant R410A: Special Precautions When Servicing Unit

    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.
  • Page 55: Checklist Before Servicing

    11-2. Checklist before Servicing 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 extrusion) by using the flare spacer.
  • Page 56: Tools Specifically For R410A

    11-3. Tools Specifically for R410A For servicing, use the following tools for R410A Tool Distinction Tools specifically for R410A Tools which can be com- monly used for R22, R407C, and R410A The above tools specifically for R410A must not be used for R22 and R407C. CAUTION Doing so will cause malfunction of the unit.
  • Page 57: In Case Of Compressor Malfunction

    11-5. In Case of Compressor Malfunction Should the compressor malfunction, be sure to make the switch to a replacement CAUTION compressor as quickly as possible. Use only the tools indicated exclusively for R410A. Specifically for R410A." 11-5-1. Procedure for Replacing Compressor (1) Recovering refrigerant Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the...
  • Page 58 (5) Recharging Be sure to charge the specified amount of refrigerant in liquid state using the service port of the wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation.
  • Page 59: In Case Refrigerant Is Leaking

    11-6. In Case Refrigerant is Leaking Never attempt to charge additional refrigerant when refrigerant has been leaking CAUTION from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant. (1) Detecting Leaks Use the detector for R410A to locate refrigerant leak points.
  • Page 60: Charging Additional Refrigerant

    11-8. Retro-Fitting Existing Systems 11-8-1. Use of Existing Units Never use new refrigerant R410A for existing units which use R22. This will cause the air conditioner to operate improperly and may result in a hazardous condition. 11-8-2. Use of Existing Tubing If replacing an older unit that used refrigerant R22 with a R410A unit, do not use its existing tubing.
  • Page 61: Appendix Ainstruction Manual

    APPENDIX A INSTRUCTION MANUAL KHS1872 + CH1872 KHS2472 + CH2472 (OI-852-6-4180-801-00-2)
  • Page 62 This air conditioner is an inverter type unit that automatically adjusts capacity as appropriate. Details on these functions are provided below; refer to these descriptions when using the air conditioner. • Microprocessor Controlled Operation The interior compartment of the remote control unit contains several features to facilitate automatic operation, easy logically displayed for easy use.
  • Page 63 Care and Cleaning ...22 Troubleshooting...25 Operating Range...25 Product Information If you have problems or questions concerning your Air Conditioner, you will need the following information. Model and serial numbers are on the nameplate on the bottom of the cabinet. Model No. ______________________ Date of purchase ___________________________________________________ Dealer’s address ___________________________________________________...
  • Page 64: Installation Location

    Otherwise there is a risk of suffocation in an extreme case. • Do not turn the air conditioner on and off from the power mains switch. Use the ON/OFF operation button. • Do not stick anything into the air outlet of the outdoor unit. This is dangerous because the fan is rotating at high speed.
  • Page 65: Names Of Parts

    Consequently, the shape may differ from that of the air conditioner which you have selected. This air conditioner consists of an indoor unit and an outdoor unit. You can control the air conditioner with the remote control unit. Air from the room is drawn into this section and passes through air filters which remove dust.
  • Page 66: Unit Display And Operation Button

    (within 4 ft.) the remote control receiver. Some radio equipment may cause malfunction of the unit. If the trouble happens, disconnect power and restart the air conditioner after a few minutes. REMOTE CONTROL receiver OPERATION button OPERATION lamp TIMER lamp...
  • Page 67: Remote Control Unit (Display)

    Displayed when the time display is set to 12-hour time. (1) Operation mode AUTO ... HEAT ... MILD DRY ... COOL ... FAN ... (2) Fan speed Automatic operation ... HIGH ... MEDIUM... LOW ... (3) Temperature setting 60 – 86 °F When set to 80 °F temperature indication...
  • Page 68: Remote Control Unit

    The illustration above pictures the remote control unit after the cover has been opened. When you press the buttons on the remote control unit, the the display to transmit the setting changes to the receiver in the air conditioner. A temperature sensor inside the remote control unit senses the room temperature.
  • Page 69 : The air conditioner starts at the set time. : The air conditioner stops at the set time. : The air conditioner stops and starts, or starts and stops, at the set times every day. For details, see “Setting the Timer”.
  • Page 70: Using The Remote Control Unit

    If the signal from the remote control unit stops for more than 15 minutes due to the loss of the remote control unit or other trouble, the air conditioner will switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the temperature around the remote control unit may differ from the temperature detected at the air conditioner’s position.
  • Page 71 Before mounting the remote control unit, press the ON/OFF operation button at the mounting location to make sure that the air conditioner operates from that location. The indoor unit should make a beeping sound to indicate that it has received the signal.
  • Page 72: Operation With The Remote Control Unit

    Check that the circuit breaker on the power panel is turned on. Once mode is selected and the unit is preset by following the steps below, you can have the air conditioner automatically bring the room to the desired temperature simply by pressing the ON/OFF operation button. STEP 1...
  • Page 73: Manual Operation

    Set the FAN SPEED selector button to the setting you want. STEP 5 Press the FLAP button and set the airflow direction as desired. (Refer to “Adjusting the Airflow Direction” on page 21.) To stop the air conditioner, press the ON/OFF operation button again. STEP 2 STEP 3 STEP 1 →...
  • Page 74: Adjusting The Fan Speed

    NOTE 3. Adjusting the Fan Speed A. Automatic fan speed B. Manual fan speed 4. Fan Only STEP 3 Operation with the Remote Control Unit (continued) • Choose the best position in the room for the remote control unit, which also acts as the sensor for room comfort and transmits the operating instructions.
  • Page 75: Night Setback Mode

    To release the night setback function, press the NIGHT SETBACK button again. When the night setback mode is selected, the air conditioner automatically raises the temperature setting 2 °F when 30 minutes have passed after the selection was made, and then another 2 °F after another 30 minutes have...
  • Page 76: Quiet Mode

    6. QUIET Mode 7. HIGH POWER Mode 8. ION Mode Operation with the Remote Control Unit (continued) QUIET Mode is used to reduce the fan sound of the indoor unit. Press the QUIET button. mark appears in the display. To cancel, press QUIET button again. •...
  • Page 77: Special Remarks

    ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F or less. • Because this air conditioner heats a room by drawing in the heat of the outside air (heat pump system), the heating efficiency will fall off when the outdoor temperature is very low.
  • Page 78: Setting The Timer

    2. Press the Advance, Return ( , ) button until PM 10:30 is displayed. 3. Press the CLOCK button again. (Example) To stop the air conditioner at 11:00 am. 1. Press the OFF TIME setting button once. 2. Press the Advance, Return ( , ) button until AM 11:00 is displayed.
  • Page 79 ) button until AM 7:10 is displayed. 3. Wait a few seconds, and then the setting is complete. (Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am. 10:30 pm. 7:10 am. Present time 1. Set the timer ON/OFF times as shown in 2-1, 2, 3 and 3-1, 2, 3.
  • Page 80: Using The 1-Hour Off Timer

    Using the 1-Hour OFF Timer 1. 1-Hour OFF Timer NOTE 2. Operation together with the DAILY ON/OFF REPEAT Timer Tips for Energy Saving Do not This function causes the unit to operate for one hour and then stop, regardless of whether the unit is on or off when this button is pressed. indicator in the display indicates that this function is operating.
  • Page 81: Adjusting The Airflow Direction

    1. Horizontal CAUTION 2. Vertical A. Sweep function The flap starts moving up and down to deliver air over the sweep range. C. Auto flap function The flap is set to the recommended position. NOTE CAUTION OI-801-21EG Adjusting the Airflow Direction The horizontal airflow can be adjusted by moving the vertical vanes with your hands to the left or right.
  • Page 82: Operation Without The Remote Control Unit

    Auto. Care and Cleaning 1. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning. 2. Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard.
  • Page 83 Anti-Mold Filter How to remove the anti-mold filter Cleaning How to replace the anti-mold filter NOTE OI-801-23EG Care and Cleaning (continued) The anti-mold filter behind the air intake grille should be checked and cleaned at least once every two weeks. 1.
  • Page 84 Cleaning the negative Follow the steps below when the generator has ion generator become dirty. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning. Remove the dust on the negative ion generator.
  • Page 85: Troubleshooting

    If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or service center. Trouble Air conditioner does not run at all. OPERATION lamp blinks and air conditioner does not operate.
  • Page 86: Installation Instructions

    APPENDIX B INSTALLATION INSTRUCTIONS KHS1872 + CH1872 KHS2472 + CH2472 (II-852-6-4189-989-00-3)
  • Page 87 The illustrations are based on the typical appearance of a standard model. Consequently, the shape may differ from that of the air conditioner that you are installing. SANYO Commercial Solutions A Division of SANYO North America Corporation Cornerstone Business Park, 1062 Thorndale Avenue, Bensenville, IL 60106, U.S.A.
  • Page 88: Important

    Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin alu- minum fins on the air conditioner can cut your fingers. When Installing… …In a Ceiling or Wall Make sure the ceiling/wall is strong enough to hold the unit’s weight.
  • Page 89: General

    1. General This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.
  • Page 90: Additional Materials Required For Installation

    WARNING tion and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surround- ing the air conditioner in a way that may block air flow. AVOID: direct sunlight. nearby heat sources that may affect performance of the unit.
  • Page 91: Outdoor Unit

    (Fig. 5f) use lug bolts or equal to bolt down unit, reducing vibration and noise. Install in a location where no antenna of a television or radio exists within 10' (3 m). (CH1872) Air intake Concrete or equal Fig. 5d...
  • Page 92: How To Install The Indoor Unit

    3. How to Install the Indoor Unit 3-1. Remove the Rear Panel from the Unit (1) Remove and discard the set screw on the rear panel. (Fig. 6) (2) Press the 2 marks on the frame cover and disen- gage the stationary tabs from the frame. (Fig. 7) (3) Remove the rear panel.
  • Page 93: Install The Rear Panel On The Wall

    (4) Using a sabre saw, key hole saw or hole-cutting drill attachment, cut a hole in the wall. See Table 4 and Fig. 10. Table 4 Hole Dia. 3-5/32" (80 mm) (5) Measure the thickness of the wall from the inside edge to the outside edge and cut PVC pipe at a slight angle 1/4"...
  • Page 94: Remove The Grille To Install The Indoor Unit

    3-4. Remove the Grille to Install the Indoor Unit Basically, these models can be installed and wired with- out removing the grille. If access to any internal part is needed, follow the steps as given below. How to remove the grille (1) Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you.
  • Page 95: Shape The Indoor Side Tubing

    3-5. Shape the Indoor Side Tubing (1) Arrangement of tubing by direction a) Right or left tubing Cut out the corner of the right/left frame with a hacksaw or the like. (Figs. 20 and 21) b) Right-rear or left-rear tubing In this case, the corner of the frame need not be cut.
  • Page 96: Recommended Wire Length And Diameter

    No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part. WARNING To avoid the risk of electric shock, each air conditioner unit must be grounded. For the installation of a grounding device, please observe local electrical codes.
  • Page 97: Wiring Instructions For Inter-Unit Connections

    3-8. Wiring Instructions for Inter-unit Connections (1) Insert the inter-unit wiring (according to local codes) into the through-the-wall PVC pipe. Run the wiring toward the indoor side allowing approx. 10" (25 cm) to extend from the wall face. (Fig. 24) (2) Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you.
  • Page 98 Loose wiring may cause the WARNING terminal to overheat or result in unit malfunction. A fire hazard may also exist. There- fore, be sure all wiring is tightly connected. When connecting each power wire to the corresponding terminal, follow the instructions “How to connect wiring to the terminal”...
  • Page 99: Mounting

    3-9. Mounting (1) To install the indoor unit, mount the indoor unit onto the 2 tabs on the upper part of the rear plate. (2) Hold down the air discharge outlet and press the lower part of the indoor unit until it clicks to securely fasten to the 2 tabs on the lower part of the rear plate.
  • Page 100 I Left-side tubing (1) Lead the tubing and drain hose through the wall, allowing sufficient length for connection. Then bend the tubing using a tube bender to make the attach- ment. (Fig. 38) (2) Switch the drain hose and drain cap. Switching drain hose and drain cap (a) Locate the drain hose and the drain cap.
  • Page 101: Drain Hose

    To unmount indoor unit Press the 2 marks on the lower part of the indoor unit and unlatch the tabs. Then lift the indoor unit and unmount. (Fig. 42) 3-10. Drain Hose a) The drain hose should be slanted downward to the outdoors.
  • Page 102: How To Install The Outdoor Unit

    4. How to Install the Outdoor Unit First refer to Section 2. Installation Site Selection. 4-1. Wiring Instructions for the Outdoor Unit Regulations on wire size differ from locality to locality. For field wiring requirements, please refer to your local elec- trical codes.
  • Page 103: Refrigerant Tubing

    5. Refrigerant Tubing 5-1. Use of the Flaring Method Many of the conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts.
  • Page 104: Connecting Tubing Between Indoor And Outdoor Units

    5-4. Connecting Tubing between Indoor and Outdoor Units a) Tightly connect the indoor side refrigerant tubing exten- ded from the wall with the outdoor side tubing. (Fig. 52) b) To fasten the flare nuts, apply specified torque as: Table 6 Tube Dia.
  • Page 105: Air Purging

    6. Air Purging Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. Therefore, they must be purged completely. pressure in the system rises operating current rises cooling (or heating) efficiency drops moisture in the air may freeze and block capillary tubing water may lead to corrosion of parts in the refrigerant system I Air Purging with a Vacuum Pump (for Test Run)
  • Page 106 (14) If there is no leakage, stop the air conditioner. (15) Wipe off the soap on the tubing. This completes air purging with a vacuum pump and the air conditioner is ready for actual operation.
  • Page 107 How to Test Run the Air Conditioner After turning on power to the air conditioner, use the remote controller and follow the steps below to conduct the test run. (1) Set the remote controller in Test Run mode. (Fig. 59a) a) Press and hold the ION button.
  • Page 108: I Basic Functions Of The Service Valves

    The basic functions of the service valves are given in Table 8 below. Table 8 Narrow Tube Service Action CLOSED Shipping Fully OPEN Operating and test running the air conditioner Fully OPEN Measuring pressure and gas charging CLOSED Air purging with a vacuum pump CAUTION When opening or clos-...
  • Page 109: Remote Control Unit Installation Position

    In direct sunlight Behind a curtain or other place where it is covered More than 26' (8 m) away from the air conditioner In the path of the air conditioner’s airstream Where it may become extremely hot or cold...
  • Page 110: Address Switch

    8-1. Address Setting of the Remote Control Unit The address can be set in order to prevent interference between remote controllers when two Sanyo indoor units are installed near each other. The address is normally set to “A.” To set a different address, it is necessary to change the address on the second remote controller.
  • Page 111: Sanyo Commercial Solutions

    SANYO Commercial Solutions A Division of SANYO North America Corporation 1300 Michael Drive, Suite A Wood Dale, IL 60191, U.S.A. Sanyo Canada Inc. 1-300 Applewood Crescent, Concord, Ontario L4K 5C7, CANADA Jan. / 2009 (T)