Cooper & Hunter CH-S18FTXG Service Manual
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Cooper & Hunter CH-S18FTXG Service Manual

Generation iii
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Service Manual
MODELS: CH-S18FTXG, CH-S24FTXG
GENERATION III
(Refrigerant R-410A)
Cooper&Hunter International Corporation

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Summary of Contents for Cooper & Hunter CH-S18FTXG

  • Page 1 Service Manual MODELS: CH-S18FTXG, CH-S24FTXG GENERATION III (Refrigerant R-410A) Cooper&Hunter International Corporation...

  • Page 2: Table Of Contents

    Table of Contents CONTENTS Summary and Features 1. Safety Precautions ..................1 2. Specifi cations .....................2 2.1 Unit Specifi cations ......................2 2.2 Operation Characteristic Curve ..................16 2.3 Capacity Variation Ratio According to Temperature ............16 2.4 Operation Data ......................17 2.5 Noise Criteria Curve Tables for Both Models ..............18 3.
  • Page 3 Table of Contents 7. Installation Manual ..................39 7.1 Tools Required for Installation ..................39 7.2 Installation Position Selection ..................39 7.3 Installation of Indoor Unit ....................40 7.4 Installation of Outdoor Unit ....................43 7.5 Power ..........................45 7.6 Test Operation .......................45 8. Exploded Views and Parts List .............46 8.1 Indoor Unit ........................46 8.2 Outdoor Unit .........................60...

  • Page 4: Summary And Features

    Summary and features Summary and features Indoor/Outdoor Unit CH-S18FTXG CH-S24FTXG Remote control window YB1F2...

  • Page 5: Safety Precautions

    Safety Precautions 1. Safety Precautions Important! Please Read Before Starting Installing, starting up, and servicing air conditioner can be Make sure the outdoor unit is installed on a stable, level hazardous due to system pressure, electrical components, surface with no accumulation of snow, leaves, or trash and equipment location, etc.
  • Page 6 C H-S24FTXG C H-S18FTXG 6450(1500~7000) 7000(1200~7800) 1310(360~2500) 1850(350~2500) 1350(350~2600) 0(350~2700) 7.12 7.03 8.56 2700 11.6 11.98 950/800/650/550/- 4.00 3.78 4.20 3.90 27-42 C H-S18FTXG C H-S24FTXG 98X765 1250/1100/950/800/- 1300/1100/1000/850/- 2-1.5 765X25.4X342.9 MP35XX 46/42/37/32/- 56/52/47/42/- 1008X319X221 1073X395X313 1076X398X328...
  • Page 7 C H-S18FTXG C H-S24FTXG Sanyo CO.,LTD/Sanyo or Daikin Sanyo CO.,LTD/Sanyo or Daikin -15~24 -15~24 847X44X660 56/-/- 66/-/- 1.70...

  • Page 8: Specifi Cations

    Specifi cations 2.2 Operation Characteristic Curve <Cooling> <Heating> 220V 220V • Conditions Indoor : DB27˚C/WB19˚C Outdoor : DB35˚C/WB24˚C Indoor air flow : High Pipe length : 5m 230V 230V 240V • Conditions 240V Indoor : DB20˚C/WB15˚C Outdoor : DB7˚C/WB6˚C Indoor air flow : High Pipe length : 5m Compressor speed (rps)

  • Page 9: Operation Data

    Specifi cations 2.4 Operation Data (1) General energy effi ciency unit Cooling Temperature condition Standard Heat exchanger pipe Indoor fan Outdoor fan Compressor (°C) Model name pressure temp. mode mode revolution (rps) Indoor Outdoor P (MPa) T1 (°C) T2 (°C) 0.9 to 1.1 12 to 14 70 to 40...

  • Page 10: Noise Criteria Curve Tables For Both Models

    Specifi cations 2.5 Noise Criteria Curve Tables for Both Models Heating Indoor side noise when blowing 24K(( High energy efficiency unit Cooling High Middle Indoor fan motor rotating speed...

  • Page 11: Construction Views

    Construction views 3. Construction Views 3.1 Indoor Unit ON/OFF Wall Mounting Frame 1008 Φ55 Φ55 Φ55 Φ55 Model W(mm) H(mm) D(mm) 215/223(GWH18KG-K3DNB1B/I) 1008 3.2 Outdoor Unit Unit: mm...

  • Page 12: Refrigerant System Diagram

    Refrigerant System Diagram 4. Refrigerant System Diagram 4.1 18K (1)Cooling Only Models INDOOR UNIT OUTDOOR UNIT GAS SIDE 3-WAY VALVE Muffler Di s charge HEAT EXCHANGE (EVAPORATOR) Accumlator Suction COMPRESSOR HEAT EXCHANGE (CONDENSER) LIQUID SIDE 2-WAY VALVE Capillary Strainer COOLING (2)Cooling &...
  • Page 13 Refrigerant System Diagram 4.2 24K (1)Cooling Only Models INDOOR UNIT OUTDOOR UNIT GAS SIDE 3-WAY VALVE Muffler Di s charge HEAT EXCHANGE (EVAPORATOR) Suction Accumlator COMPRESSOR HEAT EXCHANGE (CONDENSER) LIQUID SIDE 2-WAY VALVE Expansion valve Strainer COOLING (2)Cooling & Heating Models INDOOR UNIT OUTDOOR UNIT GAS SIDE...

  • Page 14: Schematic Diagram

    Schematic Diagram 5. Schematic Diagram 5.1 Electrical Data Meaning of marks Indoor Unit Symbol Color symbol Symbol Color symbol BLUE BROWN YELLOW GREEN BLACK YEGN YELLOW GREEN PROTECTIVE EARTH Outdoor Unit Symbol Parts name Symbol Color symbol Symbol Color symbol CBB61 BROWN WHITE...
  • Page 15 Schematic Diagram RECEIVER AND DISPLAY BOARD TUBE ROOM TEM. SENSOR TEM. SENSOR YEGN TERMINAL DISP1 DISP2 ROOM BLOCK TUBE N(1) COM-OUT YEGN JUMP AC-L L-OUT NO COM SWING-UD 4YEGN HEALTH-L HEALTH-N EARTH-PLATE IONIZER SWING EVAPORATOR MOTOR MOTOR Outdoor Unit WARNING Please don't touch any terminal when the COMPRESSOR voltage of terminal P(DC+) and N(DC-) at...
  • Page 16 Schematic Diagram WARNING Please don't touch any terminal when the COMPRESSOR voltage of terminal P(DC+) and N(DC-) at 6YEGN R(M,V) COMP AP1 is higher than 30V to prevent the risk S(W,X) C(T,U) OUTROOM EXHAUST OUTTUBE of electrical shock! TEM.SENSOR TEM.SENSOR TEM.SENSOR YEGN COMP-U...

  • Page 17: Printed Circuit Board

    Schematic Diagram 5.3 Printed Circuit Board Indoor Unit (1)Control PCB TOP VIEW Neutral line Fan capacitor connects the terminal of PG motor terminal copper pin Health relay K3 Up&down swing Auxiliary relay K1, K2 terminal Protective Piezoresistor Jumper cap tube PG feedback terminal Ambient...
  • Page 18 Schematic Diagram BOTTOM VIEW...
  • Page 19 Schematic Diagram...
  • Page 20 Schematic Diagram R151 R152 R201 C220 R202 R162 R200 R126 R153 C115 R207 R206 R205 C130 R161 R165 R192 R113 R150 R170 C9 5 R138 C101 C6 7 C8 6 C145 R234 R2 37 R2 32 R233 R235 R236 R240 R239 R238 R242...
  • Page 21 Schematic Diagram TOP VIEW Interface name Instruction The corresponding three wires are: yellow-COMP-U, blue-COMP-V, Interface of compressor red-COMP-W Overload protector of The corresponding two-core white wire connects the overload protector compressor Tube temperature (20k @25 Temperature sensor outdoor ambient temperature(15k @25 discharge temperature(50k @25 Electron expansion valve Its used for connecting the 5-core electron expansion valve EKV Its used for connecting DC fans HALL sensor (theres no interface for AC...

  • Page 22: Function And Control

    Function and Control 6. Function and Control 6.1 Remote Controller Description ON/OFF Press it to start or stop operation. MODE Press it to select operation mode (AUTO/COOL/DRY/FAN/HEAT). Press it to decrease temperature setting. Press it to increase temperature setting. Press it to set fan speed. Press it to set swing angle.
  • Page 23 Function and Control Up & down swing icon: is displayed when pressing the up & down swing button. Press this button again to clear the display. Left & right swing icon: is displayed when pressing the left & right swing button.Press this button again to clear the display. SET TIME display: After pressing TIMER button, ON or OFF will blink.This area will show the set time.
  • Page 24 Function and Control ●In static swing condition, pressing button, the swing angle of left & right louver changes as below: ●If the unit is turned off during swing operation,the louver will stop at present position. X-FAN: Pressing X -FAN button in COOL or DRY mode,the icon "X-FAN" is displayed and the indoor fan will continue operation for 10 minutes in order to dry the indoor unit even though you have turned off the unit.

  • Page 25: Changing Batteries And Notices

    Function and Control 6.2 Changing Batteries and Notices Slightly to press the place with , along the arrowhead direction to push the back cover of wireless remote control. (As show in figure) Take out the old batteries. (As show in figure) Insert two new AAA1.5V dry batteries, and pay attention to the polarity.

  • Page 26: Description Of Each Control Operation

    Function and Control 6.5 Description of Each Control Operation Indoor Unit Temperature Parameter Room setting temperature (T preset Room ambient temperature (T .) (temperature sensor :15K, partial pressure resistance:15K) Surface temperature of copper pipe for indoor heat exchanger (T ) (temperature sensor: 20K, partial pressure resistance: 20K) indoor tube 1.
  • Page 27 Function and Control When multiple malfunctions occurred simultaneously, malfunction protection codes will be displayed in cycle. 3.Other Control Target (1) Up&down swing function: the mode for swing motor is MP28EA After energization, up & down swing motor will fi rstly let the horizontal louver anticlockwise rotate to position 0 to close air outlet.
  • Page 28 Function and Control Indoor fan can be set at super-high, high, medium or low. Meanwhile, the fan will operate at super-high, high, medium and low fan speed respectively and it can also set at auto fan speed. (8) Memory Function Memory content includes mode, up &...
  • Page 29 Function and Control (1) If T ], the temperature can be set at: 16~30 C (Cooling at room temperature); outdoor ambient low-temperature cooling (2) If T < [T ], the temperature can be set at: 25~30 C (Cooling at low temperature), that is, the minimum setting outdoor ambient low-temperature cooling temperature for outdoor unit judgment is 25...
  • Page 30 Function and Control (9) Current protection 1. If 12A I , running frequency of compressor will be decreased or stop to increase will be occurred; alternating-current 2. If 17A I , the unit will stop; and compressor has stopped for 3min, the unit will resume running; alternating-current 3.

  • Page 31: Installation Manual

    Installation Manual 7. Installation Manual 7.2 Installation Position Selection 1. Indoor Unit Important Notices (1)The air inlet and outlet vent should be far from the obstruction, make sure that the air can be blown through the whole room. (2)Select a position where the condensing water can be easily 1.

  • Page 32: Installation Of Indoor Unit

    Installation Manual 7.3 Installation of Indoor Unit Burr removal 1. Completely remove all burrs from the cut cross section 1. Installing the mounting plate of pipe/tube. The mounting plate should be installed on a wall which can sup- 2. Put the end of the copper tube/pipe in a downward direc- port the weight of the indoor unit.
  • Page 33 Installation Manual 3.2 Connection of piping 5. Insert the connecting cable fully into the terminal block and se- 1. Align the center of the pipes and suffi ciently tighten the fl are nut cure it tightly with screws. by hand. 6.
  • Page 34 Installation Manual 6. Installing indoor unit How to replace the drain plug and drain hose In the case of bending or curing refrigerant pipes, keep the follow- • How to remove the drain cap ing precautions in mind. Clamp drain cap with needle-nose pliers, and pull out. Abnormal sound may be generated if improper work is conducted.

  • Page 35: Installation Of Outdoor Unit

    Installation Manual 4. Bundle the piping and drain hose together by wrapping them 7.4 Installation of Outdoor Unit with vinyl tape for enough to cover where they fi t into the rear pip- 1. Installation of Outdoor Unit ing housing section. (1) Install the unit where it will not be tilted by more than Indoor unit installation 3°.
  • Page 36 Installation Manual 2. Align the center of the pipings and suffi ciently tighten the fl are 5. Close the low pressure valve handle of gauge manifold. nut by hand. 6. Open fully the valve stem of the packed valves (both sides of Gas and Liquid).

  • Page 37: Power

    Installation Manual 7.6 Test Operation The screws are packed with the terminal board. 1. Check that all tubing and wiring have been properly connected. Terminal block 2. Check that the gas and liquid side service valves are fully open. 1. Gas Leak Test Check the flare nut connections for gas leaks with a gas leak Yellow-green Blue...

  • Page 38: Exploded Views And Parts List

    Exploded Views and Parts list 8. Exploded Views and Parts List 8.1 Indoor Unit (1)18K(Without cold plasma) Exploded View AUTO HEALTH X-FAN HUMIDITY FILTER TURBO HOUR ON/OFF ON/OFF MODE X-FAN TEMP TIMER TURBO SLEEP LIGHT...
  • Page 39 Exploded Views and Parts list Parts List Part Code Description CH-S18FTXG CH-S18FTXG CH-S18FTXG Product Code CB146N0090 CB146N0100 CB146N0320 Front Panel Assy 20012496 20012496 20012496 Filter Sub-Assy 11122104 11122104 11122104 Screw Cover 242520041 242520041 242520041 Front Case Assy 20012497 20012497 20012497...
  • Page 40 Exploded Views and Parts list Part Code Description CH-S18FTXG CH-S18FTXG CH-S18FTXG Product Code CB146N0650 CB146N0270 CB146N0570 Front Panel Assy 20012495S 20012495S 20012495S Filter Sub-Assy 11122104 11122104 11122104 Screw Cover 242520041 242520041 242520041 Front Case Assy 20012497 20012497 20012497 Guide Louver...
  • Page 41 Exploded Views and Parts list Part Code Description CH-S18FTXG CH-S18FTXG CH-S18FTXG Product Code CB146N09100 CB146N09200 CB146N0580 Front Panel Assy 20012627 20012627 20012627 Filter Sub-Assy 11122104 11122104 11122104 Screw Cover 242520041 242520041 242520041 Front Case Assy 20012497 20012497 20012497 Guide Louver...
  • Page 42 Exploded Views and Parts list Part Code Description CH-S18FTXG CH-S18FTXG Product Code CB146N0680 CB146N10200 Front Panel Assy 20012676S 20012872 Filter Sub-Assy 11122104 11122104 Screw Cover 242520041 242520041 Front Case Assy 20012497 20012873 Guide Louver 10512140 10512140 Air Louver 10512160 10512160...
  • Page 43 Exploded Views and Parts list Part Code Description CH-S18FTXG CH-S18FTXG Product code CB146N0780 CB146N0781 Front Panel Assy 20012731S 20012731S Filter Sub-Assy 11122104 11122104 Screw Cover 242520041 242520041 Front Case Assy 20012497 20012497 Guide Louver 10512140 10512140 Air Louver 10512160 10512160...
  • Page 44 Exploded Views and Parts list (2) 18K (Cold plasma) Exploded View AUTO HEALTH X-FAN HUMIDITY FILTER TURBO HOUR ON/OFF ON/OFF MODE X-FAN TEMP TIMER TURBO SLEEP LIGHT...
  • Page 45 Exploded Views and Parts list Parts List Part Code Description CH-S18FTXG CH-S18FTXG CH-S18FTXG Product Code CB146N0102 CB146N0271 CB146N0681 Front Panel 20012496 20012495S 20012676S Filter Sub-Assy 11122104 11122104 11122104 Screw Cover 242520041 242520041 242520041 Front Case Assy 20012497 20012497 20012497 Guide Louver...
  • Page 46 Exploded Views and Parts list (3) 24K Exploded View AUTO HEALTH X-FAN HUMIDITY FILTER TURBO HOUR ON/OFF ON/OFF MODE X-FAN TEMP TIMER TURBO SLEEP LIGHT...
  • Page 47 Exploded Views and Parts list Parts List Part Code Description CH-S 24 FTXG CH-S 24 FTXG CH-S 24 FTXG Product Code CB146N0150 CB146N0160 CB146N0210 Front Panel Assy 20012513 20012513 20012513 Filter Sub-Assy 11122091 11122091 11122091 Screw Cover 24252016 24252016 24252016 Front Case Assy 20012514 20012514...
  • Page 48 Exploded Views and Parts list Part Code Description CH-S 24 FTXG CH-S 24 FTXG CH-S 24 FTXG Product Code CB146N0640 CB146N0260 CB146N0600 Front Panel Assy 20012502S 20012502S 20012502S Filter Sub-Assy 11122091 11122091 11122091 Screw Cover 24252016 24252016 24252016 Front Case Assy 20012514 20012514 20012514...
  • Page 49 Exploded Views and Parts list Part Code Description CH-S 24 FTXG CH-S 24 FTXG CH-S 24 FTXG Product Code CB146N08900 CB146N09000 CB146N0590 Front Panel Assy 20012692 20012692 2001251301 Filter Sub-Assy 11122091 11122091 11122091 Screw Cover 24252016 24252016 24252016 Front Case Assy 20012514 20012514 20012514...
  • Page 50 Exploded Views and Parts list Part Code Description CH-S 24 FTXG CH-S 24 FTXG Product Code CB146N0730 CB146N09700 Front Panel Assy 20012659S 20012828 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 20012514 20012845 Air Louver 10512139 10512139 Helicoid tongue 26112229 26112229...
  • Page 51 Exploded Views and Parts list Part Code Description CH-S 24 FTXG CH-S 24 FTXG Product code CB146N11900 CB146N11901 20012739 20012739P Front Panel Case 11122091 11122091 Filter Sub-Assy 24252016 24252016 Screw Cover 20012514 20012514 Front Case Assy 10512139 10512139 Air Louver 26112229 26112229 Helicoid Tongue...

  • Page 52: Outdoor Unit

    Exploded Views and Parts list 8.2 Outdoor Unit (1) 18K COOL Exploded View 29 28 27 26 25...
  • Page 53 Exploded Views and Parts list Parts List Part Code Description CH-S 18 FTXG Product Code CB146W0090 Fan Motor 1501506301 Electric box (fireproofing) 01413148 Terminal Board 42011113 Capacitor CBB61 33010010 Electric Box 20113008 Radiator 49010252 Main Board 30138385 Electric Box Cover Sub-Assy 02603217 Electric Box Assy 02603331...
  • Page 54 Exploded Views and Parts list (2) 18K HEAT PUMP Exploded View 35 34 29 28 27 26 25...
  • Page 55 Exploded Views and Parts list Parts List Part Code Description CH-S 18 FTXG CH-S 18 FTXG Product Code CB146W0100 CB146W0320 Fan Motor 1501506301 1501506301 Electric box (fireproofing) 01413148 01413148 Terminal Board 42011113 42011113 Capacitor CBB61 33010010 33010010 Electric Box 20113008 20113008 Radiator 49010252...
  • Page 56 Exploded Views and Parts list (3) 24K COOL Exploded View 30 29 28 27 26...
  • Page 57 Exploded Views and Parts list Parts List Part Code Description CH-S 24 FTXG Product Code CB146W0150 Fan Motor 1501506301 Electric box (fireproofing) 01413148 Terminal Board 42011113 Capacitor CBB61 33010010 Electric Box 20113008 Radiator 49010008 Main Board 30138386 Electric Box Cover Sub-Assy 02603217 Electric Box Assy 0260306618...
  • Page 58 Exploded Views and Parts list (4) 24K HEAT PUMP Exploded View 36 35 30 29 28 27 26...
  • Page 59 Exploded Views and Parts list Parts List Part Code Description CH-S 24 FTXG CH-S 24 FTXG Product Code CB146W0160 CB146W0210 Fan Motor 1501506301 1501506301 Electric box (fireproofing) 01413148 01413148 Terminal Board 42011113 42011113 Capacitor CBB61 33010010 33010010 Electric Box 20113008 20113008 Radiator 49010008...

  • Page 60: Troubleshooting

    Troubleshooting 9. Troubleshooting 9.1 Precautions before Performing Inspection or Repair Be cautious during installation and maintenance. Do operation following the regulations to avoid electric shock and casualty or even death due to drop from high attitude. * Static maintenance is the maintenance during de-energization of the air conditioner. For static maintenance, make sure that the unit is de-energized and the plug is disconnected.

  • Page 61: Confi Rmation

    Troubleshooting Discharging Position: 9.2 Confi rmation (1)Confi rmation of Power Supply Confi rm that the power breaker operates(ON) normally; (2)Confi rmation of Power Voltage Confi rm that power voltage is AC 220-230-240 ±10%. If power voltage is not in this range, the unit may not operate normally. 9.3 Flashing LED of Indoor/Outdoor Unit and Primary Judgement...
  • Page 62 Troubleshooting Display Method of Outdoor Unit (Indicator has 3 kinds Display Method of Indoor Unit of display status and they will be displayed circularly every 5s.) Malfunction A/C status Possible Causes Indicator Display (during blinking, Name Illuminated ON 0.5s and OFF 0.5s) Dual-8 Blink Code...
  • Page 63 Troubleshooting Display Method of Outdoor Unit (Indicator has 3 kinds Display Method of Indoor Unit of display status and they will be displayed Malfunction circularly every 5s.) A/C status Possible Causes Name Indicator Display (during blinking, Illuminated Dual-8 ON 0.5s and OFF 0.5s) Blink Code Display...
  • Page 64 Troubleshooting Display Method of Outdoor Unit (Indicator has 3 kinds Display Method of Indoor Unit of display status and they will be displayed Malfunction circularly every 5s.) A/C status Possible Causes Name Indicator Display (during blinking, Illuminated Dual-8 ON 0.5s and OFF 0.5s) Blink Code Display...
  • Page 65 Troubleshooting Display Method of Outdoor Unit (Indicator has 3 kinds Display Method of Indoor Unit of display status and they will be displayed Malfunction circularly every 5s.) A/C status Possible Causes Name Indicator Display (during blinking, Illuminated Dual-8 ON 0.5s and OFF 0.5s) Blink Code Display...

  • Page 66: How To Check Simply The Main Part

    Troubleshooting 9.4 How to Check simply the main part 4.1 Indoor unit: (1)Temperature sensor malfunction Start Is the wiring terminal between temperature sensor and the controller loosened or poor ly contacted? Insert the temperature sensor tightly Malfunction is eliminated. Is there short circuit due to tri-pover of the pa rts? Make the parts upright Malfunction is...
  • Page 67 Troubleshooting (2)PG motor (indoor fan) does not operate (H6) “H6”is displayed on the unit. Stir the fan blade with a hand when the unit is DE - ENERGIZED . Reinstall the motor Does the and the blade to blade rotate make it rotate unsmoothly? smoothly.
  • Page 68 Troubleshooting (3)Jumper cap malfunction (C5) C5 is displayed on the unit. Install a matching Is there jumper cap on the jumper cap . controller? Is the malfunction eliminated? Re-insert the jumper Is the jumper cap inserted incorrectly or improperly? Is the malfunction eliminated? Replace the jumper...
  • Page 69 Troubleshooting 4.2 Outdoor unit: (1)Key detection point Test 4 Test 2 Test 9 Test 3 Test Test 5 Test 7 Test 6 Tset 8 Test 10 Test 11 Test 16 Test14 Test15 Test12 Test13...
  • Page 70 Troubleshooting Test point No. Test point Corresponding component Test value under normal situation Test1 Between A and C Neutral wire and live wire 160V~265V Test2 Between B and C Neutral wire and live wire 160V~265V Test3 Between D and E Electrolytic capacity of DC bus bar 180VDC~380VDC Test4 Between F and G Electrolytic capacity of switch power...
  • Page 71 Troubleshooting (2) Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit) Main detection point: Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter; Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged? Malfunction diagnosis process: Turn on the unit and wait 1 minute...
  • Page 72 Troubleshooting (3) IPM protection, desynchronizing malfunction, phase current of compressor is overcurrent (AP1 below is control board of outdoor unit) Main detection point: If control board AP1 and compressor COMP is well connected? If they are loosened? If the connection sequence is correct? Is voltage input in the normal range (Test the voltage between L, N of wiring board XT by DC voltage meter)? If coil resistance of compressor is normal? Is compressor coil insulating to copper pipe well?
  • Page 73 Troubleshooting Energize and switch on Use AC voltmeter If the voltage Check the supply to measure the IPM protection between terminal L voltage and voltage between occurs after the and N on wiring machine has run for terminal L and N restore it to board XT is within a period of time?
  • Page 74 Troubleshooting (4) Diagnosis for anti-high temperature, overload protection (AP1 below is control board of outdoor unit) Main detection point: If the outdoor ambient temperature is in normal range; If the indoor and outdoor fan is running normal; If the radiating environment of indoor and outdoor unit is well. Malfunction diagnosis process: Anti-high temperature, overload protection...
  • Page 75 Troubleshooting (5) Diagnosis for failure start up malfunction (AP1 below is control board of outdoor unit) Main detection point: If the compressor wiring is correct? If the stop time of compressor is enough? If the compressor is damaged? If the refrigerant charging is too much? Malfunction diagnosis process: Energize the unit and start it...
  • Page 76 Troubleshooting (6) Diagnosis for compressor synchronism (AP1 below is control board of outdoor unit) Main detection point: If the system pressure is over-high? If the work voltage is over-low? Malfunction diagnosis process: Synchronism Synchronism after energize the unit occurred during and start it operation Check if the fan...
  • Page 77 Troubleshooting (7) Diagnosis for overload and discharge malfunction (AP1 below is control board of outdoor unit) Main detection point: If the electron expansion valve is connected well? Is the expansion valve damaged? If the refrigerant is leakage? If the overload protector is damaged? Malfunction diagnosis process: After the unit de-energized...
  • Page 78 Troubleshooting (8) PFC (correction for power factor) malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit) Main detection point: Check if reactor (L) of outdoor unit and PFC capacity are damaged Malfunction diagnosis process: Start Check the connection wire of reactor (L) of outdoor unit and...
  • Page 79 Troubleshooting (9) Communication malfunction (AP1 below is control board of outdoor unit) Main detection point: Check if the connection wire and the built-in wiring of indoor and outdoor unit is connected well and no damaged; If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is damaged? Malfunction diagnosis process: Start...
  • Page 80 Troubleshooting (10) Diagnosis process for outdoor communication circuit: Start Test voltage value with Test 10 position in diagram with voltage meter Number jumping Test voltage value with Test 15 position in diagram with voltage meter Number jumping Outdoor unit Test voltage malfunction value with Test 11 position in...
  • Page 81 Troubleshooting Appendix 1: Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units Resistance Resistance Resistance Resistance Temp.( Temp.( Temp.( Temp.( (k ) (k ) (k ) (k ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579 1.009 16.39...
  • Page 82 Troubleshooting Appendix 2: Resistance Table of Outdoor and Indoor Tube Temperature Sensors Resistance Resistance Resistance Resistance Temp.( Temp.( Temp.( Temp.( (k ) (k ) (k ) (k ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605...
  • Page 83 Troubleshooting Appendix 3: Resistance Table of Outdoor Discharge Temperature Sensor Resistance Resistance Resistance Resistance Temp.( Temp.( Temp.( Temp.( (k ) (k ) (k ) (k ) 853.5 18.34 4.754 799.8 93.42 17.65 4.609 89.07 16.99 4.469 703.8 84.95 16.36 4.334 660.8 81.05 15.75...

  • Page 84: 2-Way, 3-Way Valve Appearance

    Troubleshooting 9.5 2-way, 3-way Valve Appearance 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench (4mm) Open position Flare nut Flare nut Closed position Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works...
  • Page 85 Troubleshooting Air purging CAUTION: Do not leak the gas in the air during Air purging. Liquid side Indoor unit Clsed Outdoor unit 2-way valve Gas side Clsed 3-way valve Vacuum pump OPEN CLOSE * Procedure CAUTION: (1)Connect the charge hose from the manifold valve to the If gas leakage are discovered in step 5 above, take the service port of the gas side packed valve.
  • Page 86 Troubleshooting Pumping Down Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (7) Immediately set the 3-way valve to the closed position. (1) Confi rm that both the 2-way and 3-way valves are set to the open position.
  • Page 87 Troubleshooting Re-air Purging Liquid side Indoor unit Closed Outdoor unit 3-Way valve Gas side Closed 3-Way valve Gas cylinder R410A OPEN CLOSE • Procedure (1) Confi rm that both the liquid side valve and the gas side (6) Disconnect the charge set and the gas cylinder, and set the Liquid side and Gas side valves to the open position.
  • Page 88 Troubleshooting Balance Refrigerant of the 3-way Valve (Gas leakage) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (1) Confi rm that both the 2-way and 3-way valves are set to (3) Open the valve (Lo side) on the charge set and dis- the back seat.
  • Page 89 Troubleshooting Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (3) Close the valve (Lo side) on the charge set, turn off the (1) Connect the vacuum pump to the center hose of charge set center hose vacuum pump, and confi...
  • Page 90 Troubleshooting Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure This is different from previous procedures. (1) Connect the charge hose to the charging cylinder. – Connect the charge hose which you dis-connected from the Because you are charging with liquid refrigerant from the gas side, absolutely do not attempt to vacuum pump to the valve at the bottom of the cylinder.

  • Page 91: Removal Procedure

    Removal Procedure 10. Removal Procedure 10.1 Removal Procedure of Indoor Unit Warning Be sure to wait for a minimum of 10 minutes after turning off all power supplies before disassembly. Only take the indoor fan of 18K as an example. Points Procedure Step...
  • Page 92 Removal Procedure Points Procedure Step 3. Opening and shutting front panel Draw out the axial bush. Bend the horizontal louver slightly and then remove it. Support the front panel by one hand, while remove the rotation axis at the upper center by the other hand.
  • Page 93 Removal Procedure Points Procedure Step 4. Opening and closing of service cover Remove a service cover mounting screw. Open service cover upward. A switch for fi eld setting is not provided in particular. screws 5. Removal of front grille assembly Remove the 5 screws, in the right and the left, Screw stoppers inside the...
  • Page 94 Removal Procedure Points Procedure Step 6. Remove electrical box Disconnect the Cable Pay attention to the direction clamp of the retainer of the thermistor so that the retainer will not touch the harness (same as the existing models.) R e m o v e Te m p e r a t u r e Heat exchanger thermistor Sensor;...
  • Page 95 Removal Procedure Points Procedure Step 7. Remove piping fi xture. Remove Pipe Clamp Auxiliary piping Piping fi xture Auxiliary piping Adjust the pipeline slightly Loosen the screws, Heat exchanger in the right and the left, which fix the Evaporator Assy. Remove Evaporator Assy...
  • Page 96 Removal Procedure Points Step Procedure 8. Remove the pressure plate of motor pressure plate of motor Remove screws of motor p r e s s p l a t e a n d t h e n remove the motor press plate.

  • Page 97: Removal Procedure Of Outdoor Unit

    Removal Procedure 10.2 Removal Procedure of Outdoor Unit Warning Be sure to wait for a minimum of 10 minutes after turning off all power supplies before disassembly. Only take heat pump unit of 18K as an example. Points Procedure Step 1.
  • Page 98 Removal Procedure Points Procedure Step 2.Remove front grille and front panel Remove the screws con- necting the front grille and the front panel. Remove the front grille. Front grille Lift the front panel and remove Twist off the screws fi xing it while pushing the right side the panel, pull it upward, panel inwards.
  • Page 99 Removal Procedure Points Procedure Step 4.Remove the axial fl ow fan The screw has reverse Twist off the nut fixing winding. the blade with wrench and the draw out the axial fl ow fan. Axial Flow Fan 5.Remove Electric Box Assy Electric Box Pull out motor, compressor temperature sensor, reac-...
  • Page 100 Removal Procedure Points Procedure Step 6. Remove soundproof sponge Since the piping ports on the sound blanket are torn Tear up the soundproof easily, remove the blanket sponge carefully. carefully. Soundproof sponge 7. Remove isolation sheet R e m o v e s c r e w s f i x i n g isolation sheet and then remove the isolation sheet.
  • Page 101 Removal Procedure Points Procedure Step 9. Remove suction and discharge Be careful so as not to burn pipe of compressor the compressor terminals or the name plate. 4-way Valve Loosen the screw of the Caution four way valve coil; Heat u p t h e b r a z e d p a r t a n d Be careful about the four way withdraw the piping with...
  • Page 102 Cooper&Hunter International Corporation...

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