Page 2 - SPECIAL PRECAUTIONS
i IMPORTANT! Please Read Before Starting This air conditioning system meets strict safety and operatingstandards. As the installer or service person, it is an importantpart of your job to install or service the system so it operatessafely and efficiently. For safe installation and trouble-free opera...
Page 3 - Table of Contents; Page
ii Table of Contents Page 1. OPERATING RANGE ................................................................................................................ 1 2. SPECIFICATIONS2-1. Unit Specifications .....................................................................................................
Page 4 - CHECKING ELECTRICAL COMPONENTS
iii 10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance ............................................................................ 64 10-2. Checking Continuity of Fuse on PCB Ass'y ...................................................................... 65 10-3. Checking Mo...
Page 22 - REFRIGERANT FLOW DIAGRAM; Indoor unit; Indoor unit
18 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor unit KHS0951 / KHS1251 Outdoor unit CH0951 / CH1251 Compressor 4-wayvalve Accumulator Wide tubeservicevalve Wide tube O.D.3/8" (ø9.52 mm)1/2" (ø12.7 mm) Narrowtubeservicevalve Narrow tube Heat exchanger Heat exchanger Muffle...
Page 23 - Cooling Characteristics; Heating Characteristics; N O T E; Indoor Unit
19 5. PERFORMANCE DATA 5-1. Performance Charts ■ Cooling Characteristics 115 V Indoor inlet air D.B. temp. ¡ F ( ¡ C) 13 12 11 10 9 8 7 6 70 (21.1) 80 (26.7) 90 (32.2) 100 (37.8) 110 (43.3) 120 (48.9) Outdoor inlet air D.B. temp. ¡ F ( ¡ C) Operating current (A) 115 V Indoor inlet air D.B. temp. ¡ F...
Page 33 - Outdoor temperature (
29 Outdoor temperature ( ¡ F DB) 0 10 20 30 40 50 60 70 80 90 100 110 120 Heating capacity ratio (%) 47 50 60 40 30 20 17 5-4. Heating Capacity Indoor unit KHS0951 / KHS1251 / KHS1852 Outdoor unit CH0951 / CH1251 / CH1852 1) ● … Point of rating condition Black dot in the chart indicates the followin...
Page 37 - WARNING
33 6-2. Electric Wiring Diagrams (1) Indoor unit KHS0951 / KHS1251 WARNING To avoid electrical shock hazard, be sure todisconnect power before checking, servicingand/or cleaning any electrical parts. 000-111 SM (18-68) 00.3.17 11:49 AM y [ W 33
Page 45 - Top view
41 (9) Printed circuit board POW-CH095 (for CH0951, CH1251 and CH1852) Top view 000-111 SM (18-68) 00.3.17 11:49 AM y [ W 41
Page 46 - INSTALLATION INSTRUCTIONS; To prevent abnormal heat; For stable operation of the; Table 1
42 7. INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection 7-1-1. Indoor Unit WARNING To prevent abnormal heat generation and the possibility of fire, do not place obsta- cles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow. Max. Allowabl...
Page 48 - Position; Removable mounting
44 7-2. Remote Control Unit Installation Position The remote control unit can be operated from either a non-fixed position or a wall-mounted position. To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places: ● In direct sunlight ● Behind ...
Page 49 - Risk of Electric Shock
45 7-3. Address Switches If you are installing more than 1 indoor unit (up to 2) in the same room, it is necessary for you to assign each unit its own address so each can be operated by its own remote control unit. You assign the addresses by matching the switch positions of each indoor unit with th...
Page 50 - and Diameter; Regulations on wiring diameter differ from locality to
46 7-4. Recommended Wire Length and Diameter Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these reg- ulations when carrying out the installation. Refer to the wiring system diagram (Fig....
Page 51 - Cooling
47 8. FUNCTION 8-1. Room Temperature Control ■ Cooling ● Room temperature control is obtained by cycling the compressor ON and OFF under control of the room tem-perature sensor in the remote control unit. ● The room temperature (and other information) is transmitted every 3 minutes by the remote con...
Page 52 - Heating
48 ■ Heating ● Room temperature control is obtained by cycling the compressor ON and OFF under control of the room tem- perature sensor in the remote control unit. ● The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the controller in the indoor...
Page 53 - When the compressor stops, the indoor fan stops as well.; -3. Automatic Switching between Cooling and Heating; COOL
49 8-2. Dry Operation (Dehumidification) ● Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by running at low level to dehumidify without greatly reducing the room temperature. The air conditioner repeats the cycle of turning ON and OFF automatically as shown ...
Page 54 - This function prevents freezing of the indoor heat exchange coil.
50 8-4. Freeze Prevention (Cooling) ● This function prevents freezing of the indoor heat exchange coil. ● When the compressor has been running for 10 minutes or more and the temperature of the indoor heat exchange coil falls below 30°F, the control circuit stops the compressor for at least 6 minutes...
Page 56 - Defrosting Flowchart
52 8-7. Defrosting Operation (Heating) ■ Defrosting Flowchart Compressor ON Indoor heat exchanger coiltemperature drops 1.4 ¡ F per 6 minutes and it repeats3 times in succession. Integrated operating time ofcompressor is more than 3hours. Defrosting begins. Cold-draft prevention Temperature of outdo...
Page 58 - -1. Check before and after troubleshooting; plate in the outdoor unit.; Hazardous voltage can cause ELECTRIC SHOCK or
54 9. TROUBLESHOOTING 9-1. Check before and after troubleshooting 9-1-1. Check power supply wiring. ● Check that power supply wires are correctly connected to terminals No. 7 (L1) and No. 8 (L2) on the terminal plate in the outdoor unit. 9-1-2. Check inter-unit wiring. ● Check that inter-unit wiring...
Page 60 - There is a possibility of short circuit.
56 B. Circuit breaker trips in several minutes after turning the air conditioner on. ● There is a possibility of short circuit. 9-2-2. Neither indoor nor outdoor unit runs. A. Power is not supplied. B. Check "OPERATION selector" switch in the indoor unit. YES NO • OPERATION selector switch i...
Page 61 - E. Check TIMER on the remote control unit.
57 C. Check remote control unit. D. Check fuse on the indoor PCB Ass'y. E. Check TIMER on the remote control unit. • Timer is turned ON. Check to see if is displayed on remote control. YES Cancel the timer mode. ON OK OK • Check fuse on indoor PCB Ass'y for continuity. (F) • Check operation lamp to ...
Page 65 - HEAT
61 9-4. Air conditioner operates, but abnormalities are observed. 9-4-1. Operation does not switch from HEAT to COOL (or COOL to HEAT). • Indoor PCB Ass'y is defective. • Check voltage between terminals No. 3(+) and No. 5 at terminal plate. (DC 24V) No voltage appears. Outdoor PCB Ass'y is defective...
Page 68 - Resistance; Resistance for Electrical Parts
64 10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance ● The insulation is in good condition if the resistance exceeds 2M ½ . 10-1-1. Power Supply Wires Clamp the ground wire of the power supply wires with the lead clip of the insulation resistance tester and measure the re...
Page 70 - ARRANGEMENT OF ELECTRICAL COMPONENT
66 11. ARRANGEMENT OF ELECTRICAL COMPONENT 1 6 5 4 3 2 G Fan motor capacitor Coil temp. thermistor Room temp. thermistor Flap motor Lamp Ass'y Terminal base Controller(PCB Ass'y) Transformer SEC. PRY. Indoor Unit KHS1852 1 6 5 4 3 2 G Coil temp. thermistor Room temp. thermistor Flap motor Lamp Ass'y...
Page 71 - FM; Electric Parts; Outdoor Unit
67 12 3 4 6 58 7 NO COM NC PR TH UNIT FM1 FM G SUPPLY 20S CONTROLLER PTC Thermistor(Only for 115V models) Compressor motor capacitor Fan motor capacitor Power relay Terminal base Controller (PCB Ass'y) (L1) (L2) Solenoid coil(4-way valve) Defrost thermostat Fan Motor Electric compornet box Crankcase...
Page 73 - Features
Features This air conditioner is equipped with cooling, heating and drying functions. Details on these functions areprovided below; refer to these descriptions when using the air conditioner. • Microprocessor Controlled Operation The interior compartment of the remotecontrol unit contains several fe...
Page 74 - Contents; Product Information; Alert Symbols
Contents Page Features .................................................................................................................. 2Product Information .............................................................................................. 3Alert Symbols ..................................
Page 75 - Safety Instructions; Do not let children play with the air conditioner.
Installation Location • We recommend that this air conditioner be installed properly byqualified installation technicians in accordance with the InstallationInstructions provided with the unit. • Before installation, check that the voltage of the electric supply in yourhome or office is the same as ...
Page 76 - Names of Parts; NOTE; Air Intakes; Remote Control Unit; Refrigerant Tubes
Names of Parts NOTE This illustration is based on the external appearance of a standard model.Consequently, the shape may differ from that of the air conditioner whichyou have selected. This air conditioner consists of an indoor unit and an outdoor unit.You can control the air conditioner with the r...
Page 77 - Unit Display and Operation Selector; IMPORTANT
Unit Display and Operation Selector Remote control receiver This section picks up infrared signals from the remote control unit(transmitter). Operation selector ON position This position is for operating the air conditioner with the wirelessremote control unit.Set the selector normally in this posit...
Page 78 - OFF; Symbols
Remote Control Unit (Display) SET TEMP. ON OFF 1 HR. H (1) Operation mode AUTO ....................................... HEAT ........................................ MILD DRY................................ COOL ....................................... (2) Fan speed AUTO .................................
Page 79 - ADDRESS switch
Remote Control Unit NOTE The illustration above pictures the remote control unit after the cover hasbeen lowered and removed. Transmitter When you press the buttons on the remote control unit, the mark appears in the display and the setting changes are transmitted to thereceiver in the air condition...
Page 81 - Using the Remote Control Unit; DO NOT
Using the Remote Control Unit How to Install Batteries NOTE • The batteries last about six months, depending on how much you usethe remote control unit. Replace the batteries when the remote controlunit's display fails to light, or when the remote control cannot be usedto change the air conditioner’...
Page 82 - Using the Remote Control Unit (continued); Mounting the Remote; Mounting on a wall
Using the Remote Control Unit (continued) Mounting the Remote Control Unit Mounting on a wall A. Removable mounting 1) Momentarily hold the remote control unit at the desired mounting position. 2) Confirm that the air conditioner responds correctly when you press keys on the remote control from that...
Page 84 - Operation with the Remote Control Unit (continued)
Operation with the Remote Control Unit (continued) Press TEMP. to change the temperature setting. • Although the fan speed is set automatically, you can change the fanspeed by pressing the FAN SPEED selector button. To stop the air conditioner, press the ON/OFF operation button again. TEMP. To raise...
Page 86 - Cooling and DRY mode:
Operation with the Remote Control Unit (continued) NOTE • This appliance has a built-in 5-minute time delay circuit to ensurereliable operation. When the operation button is pressed, thecompressor will start running within three minutes. In the event ofpower failure, the unit will stop. When the pow...
Page 87 - Night Setback Mode; The Night Setback Mode is used for saving energy.
Operation with the Remote Control Unit (continued) 4. Night Setback Mode The Night Setback Mode is used for saving energy. Press the NIGHT SETBACK button while the air conditioner is operating.The mark appears in the display. To cancel the night setback function, press the NIGHT SETBACK buttonagain....
Page 88 - A. In Cooling and DRY; Time
Operation with the Remote Control Unit (continued) 17 OI-202-19EG oi202000 A. In Cooling and DRY Mode: ( and ) When the night setback mode is selected, the air conditionerautomatically raises the temperature setting 2 ° F when 30 minutes have passed after the selection was made, and then another 2 °...
Page 89 - Special Remarks; Power failure; STANDBY lamp
Special Remarks ``DRY'' ( ) Operation How it works? • Once the room temperature reaches the level that was set, the unitrepeats the cycle of turning on and off automatically. • During DRY operation, the fan speed is automatically set to LOW orVERY LOW; the fan speed then switches back and forth betw...
Page 90 - Cancellation procedure:
Using the 12-Hour ON and OFFTimer 1. TIMER ON mode (Example) After the length of time set for TIMER ON elapses, the unit beginsoperating. ON H The display depicted at left indicates that the air conditioner will beginoperating in three hours. Setting procedure: STEP 1 Press the MODE selector button ...
Page 91 - Using the 1-Hour OFF Timer
Using the 1-Hour OFF Timer 1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop,regardless of whether the unit is on or off when the button is pressed.The 1 HR. indicator in the display indicates that this function is operating. Setting procedure:Regardless of whet...
Page 92 - Adjusting the Airflow Direction
Adjusting the Airflow Direction 1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes withyour hands to the left or right. CAUTION When the humidity is high, the vertical vanes should be in the frontposition during the cooling or dehumidifying operation. If the vertical v...
Page 93 - Care and Cleaning
Operation without the RemoteControl Unit If you have lost the remote control unit or it has trouble, follow the stepsbelow. 1. When the air conditioner is not running If you want to turn on the air conditioner, switch the operation selector tothe OFF position, and then to the ON position. NOTE The s...
Page 94 - Air intake grille
Care and Cleaning (continued) Anti-mold filter The anti-mold filter behind the air intake grille should be checked andcleaned at least once every two weeks. How to remove the anti-mold filter 1. Grasp both ends of theair intake grille and pullit out and up. 2. Push the anti-moldfilter up slightly, a...
Page 95 - Air cleaning filter; How to install the air; Cleaning the main unit and
Care and Cleaning (continued) Air cleaning filter (not provided) The air cleaning filter removes dust and dirt from the air, and reduces odorsand smoke from tobacco. NOTE KHS0951/KHS1251The air cleaning filter is not provided with the air conditioner and must bepurchased separately. The first time t...
Page 96 - When using a footstool or the like, be careful not to let it tip over.; Tips for Energy Saving; Do not
Care and Cleaning (continued) Removing and remounting the air intake grille • With the air intake grille openall the way, grip both armswith your hands and pulltoward you to remove.To remount, hold the airintake grille roughlyhorizontal and push it in untilthe arm shafts fit into theindentations in ...
Page 97 - Troubleshooting; Operating Range
Troubleshooting If your air conditioner does not work properly, first check the following points before requesting service. If itstill does not work properly, contact your dealer or service center. Trouble Possible Cause Remedy Air conditioner does not runat all. 1. Power failure. 1. Restore power. ...
