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Panasonic CS-KE18NB4U Service Manual

1. 2 riese ASSY dINV MOd NMd 219192 u 9 9 dZ MOd NMd o s vjeje t 2 o js 8 2 dd LHM d9 n18 de n18 d9 TJA NH k YOLOW NVA ASvd TIVNIINH3 L DOO LINN OL IS OV LOV 3409 6 qp 35 Outdoor Unit CU KE12NK1 REACTANCE BLK POWER RELAY 1P CONNECTOR WHT 1P CONNECTOR WHT 2 BLK FERRITE CORE TERMINAL PLATE 2P CONNECTOR e CRANKCASE HEATER CONTROLLER COIL COMP Ll Z POWER O SUPPLY YEL YEL BLK BLK I c O 2 2 Q A n HIGH PRESSURE SWITCH FERRITE PNK CORE A 42434445 6 HAER 2P CONNECTOR WHT THERMISTOR OUT DOOR THERMISTOR VW COMPRESSOR THERMISTOR COIL 7P CONNECTOR WHT AWAY VALVE MAGNETIC COIL FAN MOTOR COMPRESSOR OVERLOAD RELAY MOTOR OLR YW WHT ELEC SYSTEM ASSY WHT WHT 2P CONNECTOR BLK 8FA2 5251 12200 2 36 Outdoor Unit CU KE18NKU REACTANCE POWER RELAY HOOUANI OL 3 TERMINAL PLATE 4 HIGH PRESSURE SWITCH FERRITE CORE d
2. measure the resistance by placing probe on each terminal screw on the terminal plate Fig 2 Clip Note that the ground line terminal should be skipped for the check Copper lt Insulation tube or Q tester metallic part 10 1 4 Measurement of Insulation T E Resistance for Electrical Parts Disconnect the lead wires of the desired electric part tube or KI m metallic part O from terminal plate capacitor etc Similarly disconnect the connector Then measure the Insulation resistance Insulation Figs 3 and 4 Fig 3 From fan motor compressor and other parts Refer to Electric Wiring Diagram If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin Metallic part Clip Insulation Fig 4 tester 60 10 2 Checking Continuity of Fuse on PCB Ass y Gees e Remove the PCB Ass y from the electrical component box Then pull out the fuse from the PCB Ass y Fig 5 e Check for continuity using a multimeter as shown in PCB Ass y Fig 6 ig 6 e Fig 5 Fuse Fig 6 61 11 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11 1 Characteristics of New Refrigerant R410A 11 1 1 What is New Refrigerant R410A R410A is a new refrigerant that contains two types of pseudo non azeotropic refrigerant mixture Its refrigeration capacity and energy efficiency are about the same level
3. If the outdoor controller is normal approximately 30 seconds will be required for the charge to dissipate However allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller 9 2 Method of Self Diagnostics Follow the procedure below to perform detailed trouble diagnostics m 4 Test run mode lt Clock display gt Self diagnostics mode 1 If the operation lamp blinks every 0 5 seconds immediately when the power is turned ON there is an external ROM data failure on the indoor circuit board or a ROM socket insertion problem or the ROM has not been installed 2 The failure mode is stored in memory even when the power is not ON 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 lt button Step 1 Press and hold the remote controller HIGH POWER button and 1 HIGH POWER HR TIMER button Then press and hold the ACL reset button button with a pointed object such as the tip of a pen After 5 seconds ON OFF operation release ACL button first then release HIGH POWER and 1 HR TIMER buttons oP 1 test run appears blinking in the remote button controller clock display area FANSPEED MODE Step 2 Next press the 1 HR TIMER button once to change the display from oP 1 to oP 3 self diagnostics The display
4. 0 5 10 15 20 25 Outdoor inlet air DB temp F C e 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 Protective Functions Overload prevention during heating 26 5 2 Cooling Capacity Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Power Supply 115V Single Phase 60Hz lt Cooling Capacity gt RATING CAPACITY 11 900 BTU h AIR FLOW RATE 235 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F 105 115 m 3 e 9 Ps 4 bs 0 40 6 46 1 8 800 6 570 12 070 11 900 5 610 5 520 12 450 N gt 3 960 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C DB 67 F 19 4 C WB Outdoor Ambient Temp 95 F 35 C DB 2 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 27 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU Power Supply 230V Single Phase 60Hz Cooling Capacity
5. 2 Above data represents the value when the operation frequency of a compressor is fixed 29 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU Power Supply 230V Single Phase 60Hz lt Cooling Capacity Low Ambient gt RATING CAPACITY 17 500 BTU h AIR FLOW RATE 341 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP Se sa m on 13 260 13 300 13 370 13 480 13 560 13 640 13 670 7 950 7 950 7 950 11 860 8 080 8 080 8 140 13 040 6 160 12 010 12 110 12 380 12 850 13 150 13 440 13 650 3 640 3 700 3 770 12 850 4 030 4 170 4 230 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h NOTE 1 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics 2 Above data represents the value when the operation frequency of a compressor is fixed 30 5 4 Heating Capacity Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Power Supply 115V Single Phase 60Hz lt Heating Capacity gt RATING CAPACITY 13 600 BTU h AIR FLOW RATE 268 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP F C WB 60 65 70 75 80 15 6 18 3 21 1 23 9 26 7 NO NO 0 17 8 TH Total Heating Capacity BTU h 3 16 1 8 13 3 13 10 6 18 7 N
6. If the air conditioner is turned off during the defrosting cycle it will continue defrosting and turn itself off after defrosting is completed 50 CT Peak current cut off control This function prevents the circuit breaker or fuse from operating to open the circuit This function works when electrical current has increased due to an increase in the cooling heating load or to a decrease in the power supply voltage In these cases operation frequency is reduced or operation is interrupted auto matically to control the electrical current for operation e When the cause of the increase in electrical current is rectified the system will resume operation in the original mode lt CS KE12NB41 gt Cooling Dry Peak current cut off trips Hz down lt CS KE18NB4UW gt Cooling Dry Heating Electrical current setting for COOL operation is used during DEFROST operation 9 TROUBLESHOOTING BEFORE CALLING FOR SERVICE 9 1 Precautions before Performing Inspection or Repair After checking the self diagnostics monitor turn the power OFF before starting inspection or repair High capacity electrolytic capacitors are used inside the outdoor unit controller inverter They retain an electrical charge charging voltage DC 310V even after the power is turned OFF and some time is required for the charge to dissipate Be careful not to touch any electrified parts before the controller LED red turns OFF
7. Meis 8 HHE sor 27 AE Tr HH E i HAHU 0 77 104 25 30 Ge Outdoor inlet air DB temp R Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value 23 Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 B Heating Characteristics RH 85 Indoor fan speed High fan 60Hz 115V 1 High pressure performance chart psig MPaG oV py High pressure at wide tube service valv 1 523 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor inlet air DB temp F C 2 Operating current performance chart 16 15 5 gt 14 c E 5 13 i O _ 11 a HUHH 23 77 5 0 5 10 18 20 25 Outdoor inlet air DB temp F C 3 Indoor discharge air performance chart 13 Indoor discharge air temperature F C 7 5 0 5 10 15 20 25 Outdoor inlet air DB temp F C 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 Protective Functions Overload prevention during heating 24 Indoor Unit CS KE18
8. OLO3NNOO dc 2P CONNECTOR BLK CONTROLLER LHM HOLO3NNOO d2 O E LLI Z lt THM HOLO3NNO2 dZ HOLSINHIH L SE 7102 13A COIL OUTDOOR HOLSIINHJH L aooaa LNO aan A TH VW YOLSINYSHL 5 3809 IL19434 LHM HOLO3NNOO d AWAY VALVE FAN MOTOR COMPRESSOR OVERLOAD RELAY COIL OLR MOTOR WHT ELEC SYSTEM ASSY 2P CONNECTOR RED 8FA2 5251 11900 2 37 7 MAINTENANCE 7 1 Address Setting of the Remote Controller The address can be set in order to prevent interference between remote controllers when two indoor units are installed near each other The address is normally set to To set a different address it is necessary to change the address on the second remote controller 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 1 When the tab is removed the address is automatically set to B Fig 2 3 Press and hold the remote controller HIGH POWER button and 1 HR TIMER button Then press and hold the ACL reset button with a pointed object such as the tip of a pen After 5 seconds release ACL button first then release HIGH POWER and 1 HR TIMER buttons oP 1 test run appears blinki
9. 23 5 28 2 33 0 O 38 3 LA 43 6 O 48 8 cO 53 11 7 58 14 4 63 17 2 TH TH TH TH TH TH TH TH TH TH TH TH TH TH 65 18 3 T NOTE 1 Rating conditions Indoor Unit Entering Air Temp 70 F 21 1 C DB Outdoor Ambient Temp 47 F 8 3 DB 43 6 1 WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 31 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU Power Supply 230V Single Phase 60Hz lt Heating Capacity gt RATING CAPACITY 20 400 BTU h AIR FLOW RATE 383 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP VW 60 65 70 75 80 15 6 18 3 21 1 23 9 26 7 11 350 11 400 11 440 11 480 11 510 11 720 11 770 11 820 11 850 11 890 17 8 TH 3 16 1 TH 13 10 6 TH 13 520 13 710 28 2 2 TH 16 730 16 770 43 6 1 TH TH Total Heating Capacity BTU h 48 8 9 TH 53 11 7 TH 58 14 4 TH 63 17 2 TH O 65 18 3 TH 1 Rating conditions Indoor Unit Entering Air Temp 70 F 21 1 C DB
10. Additional Refrigerant 11 7 1 When Tubes are Extended Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit Charge additional refrigerant in liquid state only N CAUTION Never charge additional refrigerant if refrigerant is leaking from the unit Follow instructions given in 11 6 In Case Refrigerant is Leaking and completely carry out repairs Only then should you recharge the 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 e lf replacing an older unit that used refrigerant R22 with R410A unit do not use its existing tubing Instead completely new tubing must be used 68
11. CZ RD515U 1 OPERATING RANGE Temperature _ Indoor Air Intake Temp Outdoor Air Intake Temp 95 F DB 71 F WB 115 F DB Cooling 80 F DB 67 F WB 75 F DB 65 F WB eatin DB WB DB 0 FWB 2 SPECIFICATIONS 2 1 Unit Specifications 2 1 1 Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Voltage Rating 115V Single Phase 60Hz Heating 11 900 3 000 11 900 13 600 3 000 to 13 600 kW 35 0 9t03 5 40 0 9104 0 Air Circulation Hi Me Lo ft min m3 h 235 399 206 350 194 330 268 455 247 420 224 381 146 2510 146 Power Input W 1 460 250 to 1 460 Power Factor Performance Electrical Rating Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity 2 0 Controls Temperature Control Control Unit Timer Fan Speeds indoor Outdoor Airflow Direction Indoor Horizontal Vertical Operation Sound Indoor Hi Me Lo dB A 34 32 31 35 34 32 Refrigerant Tubing Connections Refrigerant Narrow tube mm Tube Diameter Wide tube inch mm Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit i Body Panel CS KE12NB41 amp CZ 18BT1U CS KE12NB41 CZ 18BT1U Unit Dimensions Height ____ 1113 32 290 4 1 8 105 _ _____ 7 24 13 16 630 26 3 16 665 ____ Package Dimensions Height Weight Net Ib kg
12. Discharge Temp Control Yes Yes Operation cutoff control in abnormal ambient Temp Yes Overload Relay Model CS 7L115 Operation Temp Open 239 F 115 C Close 203 F 95 C Run Capacitor Micro le VAC Crankcase Heater Propeller Q ty Dia inch mm 1 016 17 32 D420 Coil Resistance RED 77 5 Ambient Temp 68 F 20 C WHT BLU 77 5 BLU RED 77 5 Type Internal Controller Over Current Protection Yes Run Capacitor Heat Exchanger Coil Fins per inch Face Area ft m External Acrylic baked on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE 2 3 Other Component Specifications Indoor Unit CS KE12NB41 amp CZ 18BT1U CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE12NK1 CU KE18NKU Indoor heat exchanger sensor Model PT2M 51H S3 Compressor temp sensor Indoor air temp sensor CU KE12NK1 Model DTN TKS274Y TH2 Model KTEC 35 S98 CU KE18NKU Model DTN TKS293B Resistance k ohm Resistance k ohm e EE o TTT 32 50 68 86 104 122 140 158 176 194 0 10 20 30 40 50 60 70 80 90 Temperature 50 59 68 77 86 95 104 10 15 20 25 30 35 40 Temperature F C Outdoor air temp sensor CU KE12NK1 Model DTN TKS269B CU KE18NKU Model TKS295B Outdoor heat exchanger sensor CU KE12NK1 Model DTN TKS274Y T
13. Outdoor Ambient Temp 47 F 8 3 DB 43 6 1 WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 32 6 ELECTRICAL DATA 6 1 Electrical Characteristics Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Cooling Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 115V Single phase 60Hz Rating conditions Running amp 12 39 Power input 1 242 1 260 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 DB Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Heating Performance at 115V Single phase 60Hz Rating conditions Running amp 14 35 Power input 1 440 1 460 Rating conditions Indoor air temperature 70 F 21 1 C DB Outdoor air temperature 47 F 8 3 C DB 43 F 6 1 WB 33 Indoor Unit CZ KE18NB4U amp CZ 18BT1U Outdoor Unit CU KE18NKU 1 Voltage 230V Cooling lt 230V gt Indoor Unit Outdoor Unit Commen Unik Fan Motor Fan Motor Compressor P Performance at 230V Single phase 60Hz Rating conditions _ Running amp Po
14. RATING CAPACITY 17 500 BTU h AIR FLOW RATE 341 CFM INDOOR OUTDOOR ENT TEMP F AMBIENT TEMP F 105 115 1 52 40 6 46 1 17 500 8 140 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C DB 67 F 19 4 C WB Outdoor Ambient Temp 95 F 35 C DB 2 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 28 5 3 Cooling Capacity Low Ambient Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Power Supply 115V Single Phase 60Hz lt Cooling Capacity Low Ambient gt RATING CAPACITY 11 900 BTU h AIR FLOW RATE 235 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C WB 0 5 15 25 35 45 55 17 8 15 0 9 4 3 9 1 7 7 2 12 8 59 15 0 63 17 2 7 890 7 890 7 940 9 530 8 030 8 080 8 080 6 2 7 19 4 1 7 21 7 Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h NOTE 1 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics
15. Unit Dimensions amp Weight Indoor Unit 7 Body Panel CS KE18NBAUW amp CZ 18BT1U CS KE18NB4UW CZ 18BT1U Unit Dimensions Height Package Dimensions Height j Sd 18782 20 _4 18 105 _____ 243 16 630 26 3 16 665 _____ 28 48 714 26 11 16 678 Weight Net Ib kg D Se Shipping Volume cuft m ______ 4 59 0 13 Outdoor Unit CU KE18NKU Unit Dimensions Heighi i 11 7 32 285 Package Dimensions Height i Weight Net Shipping Shipping Volume cuf DATA SUBJECT TO CHANGE WITHOUT NOTICE Dimensions amp Weight Outdoor Unit Remarks Rating conditions are Cooling Indoor air temperature 80 F DB 67 F WB Heating Indoor air temperature 70 F DB Outdoor air temperature 95 DB 75 WB Outdoor air temperature 47 DB 43 WB 10 2 1 3 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU lt 208V gt Voltage Rating 208V Single Phase 60 2 Heating Total Capacity BTU h 17 500 4 000 to 17 500 20 400 4 400 to 20 400 kW 515 1205 15 60 1306 0 Air Circulation Hi Me Lo ft min 341 579 294 500 253 430 383 651 324 551 265 450 115 1810115 Power Input W 2 340 27010 2 340 Power Factor Performance Electrical Rating Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Controls Temperature Control Control Unit Timer Fan Speeds indoor Outdoor Airflow Direction Indo
16. as the receiver below the unit display Each time this button is pressed the OPERATION lamp changes color to indicate the type of operation Select the desired type of operation SENSOR DRY During DRY operation the system adjusts the room temperature and fan speed according to the conditions in the room in order to maintain a comfortable room environment SENSOR DRY operation e DRY operation is as shown in the figure below Load COOL gt HEAT gt STOP COOL zone GREEN RED Lamp Off e The set temperature is 4 F 2 C below the detected room temperature in the case of cooling operation and 4 F 2 C Conditions are monitored at all times when the room temperature is below 59 F 15 C The compressor operation frequency varies The indoor fan operates with 1 f fluctuation The compressor operates at a low operating frequency The indoor fan operates with 1 f fluctuation Monitoring operation takes place when the room temperature is below 59 F 15 C or more than 5 F 3 C below the set temperature When the monitoring range is entered the compressor stops and the indoor fan operates with 1 f fluctuation above the room temperature in the case of heating operation The flap and fan speed settings are AUTO H AUTO cooling heating operation Selecting the operation mode When AUTO mode is selected the microprocessor calculates the difference between the set temperature and the r
17. cause an electric shock or fire Never modify the unit Doing so may cause an electric shock or fire Perform all electric work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use the exclusive circuit Insufficient capacity to the electric circuit or defective arrangement results may cause an electric shock or fire Make sure to replace any power cable or lead wire showing any signs of scratch or deterioration Failure to do so may cause an electric shock overheating or fire Make sure that there is no dust on or slack in the power plug and insert fully into the socket Dust or incomplete connections may cause an electric shock or fire Do not damage or process the power cord as it may cause an electric shock or fire For the wiring between the indoor unit and outdoor unit securely fix the specified cable onto the terminal plate Poorly fixed wiring may cause a heat or fire After connecting the wiring between the indoor unit and outdoor unit attach the terminal cover securely Incomplete attachment of the terminal cover may cause overheating or fire Prohibit Prohibit Prohibit Prohibit Prohibit 9929993929 If refrigerant gas blows off during the work do not touch the refrigerant gas as it may cause frostbite S Prohibit If refrigerant gas leaks during the work ventilate the room If refrigerant gas catches fire harmful gas may be generat
18. continues to FLAP NIGHT SETBACK blink Step 3 Finally press the ON OFF button to engage self diagnostics mode e The self diagnostics function utilizes the 3 indicator lamps on the main TIMER unit in combinations of ON lamps blinking lamps and OFF lamps to report the existence of sensor trouble or a protective operation The lamps blink remain 5 seconds then turn OFF for 2 seconds gt C Self diagnostics is completed when the buzzer sounds 3 short beeps CANCEL AL A maximum of 3 self diagnostics reports are displayed for 5 seconds Reset each beginning with the most recent report Following this display the en ice lamps turn OFF In order to view the self diagnostics results again press the ON OFF button again The 3 lamps remain OFF if no trouble has occurred lt IMPORTANT gt After self diagnostics is completed be sure to press the ACL reset button to return to normal mode The air conditioner will not operate if this is not done 51 A WS 1 Self diagnostics Lamps OPERATION button OPERATION lamp TIMER lamp HIGH POWER lamp REMOTE CONTROL receiver Since the indications cover various units the corresponding parts listed below may not be present in some models INDICATION ON INDOOR UNIT BLINKING T ON HIGH ER ay Power 7 CODE DIAGNOSIS CONTENTS POSSIBLE MALFUNCTION 1 OPEN OR SHORT CIRCUIT IN SENSOR 501 ROOM TEMP SE
19. i asi E Shipping Volume cuftm 459 0 13 Outdoor Unit CU KE12NK1 Unit Dimensions Height 21 9 16 548 28 11 32 720 10 7 16 265 ee Package Dimensions Height Dimensions amp Weight Outdoor Unit 34 3 32 Weight Net Shipping DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks Rating conditions are Cooling Indoor air temperature 80 F DB 67 F WB Heating Indoor air temperature 70 F DB Outdoor air temperature 95 75 WB Outdoor air temperature 47 DB 43 WB 2 1 2 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU lt 230V gt Voltage Rating 230V Single Phase 60Hz Heating Total Capacity BTU h 17 500 4 000 to 17 500 20 400 4 400 to 20 400 kW 515 1205 15 60 1306 0 Air Circulation Hi Me Lo ft min 341 579 294 500 253 430 383 651 324 551 265 450 10 5 1 3to 10 5 Power Input W 2 340 27010 2 340 Power Factor Performance Electrical Rating Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Controls Temperature Control Control Unit Timer Fan Speeds indoor Outdoor Airflow Direction Indoor Horizontal Vertical Operation Sound Indoor Hi Me Lo dB A 44 40 36 Outdoor Hi dB A 51 52 Refrigerant Tubing Connections Refrigerant Narrow ube oh mm Tube Diameter Wide tube inch mm Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU lt 230V gt Individual Unit Indoor
20. iiy E Cooling cycle Es n A Defrosting cycle Strainer Muffler lt ee 1 4 EE Heating cycle 21 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU Indoor unit Outdoor unit mE 1 Wide tube Accumulator d service pa 6 Di Wide tube valve 3 T XU High pressure i Muffler switch 7 12 7mm R 4 way valve 1 6 o I c S 2 45 5 Capillary tube for NENON Electric split flow in tube expansion 1 service vave Narrow tube 1 valve is Wee CRIT d Cooling cycle ES gt Defrosting cycle OD Strainer 1 4 EE EE EE E Heating cycle 22 5 PERFORMANCE DATA 5 1 Temperature Charts Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Cooling Characteristics RH 46 Indoor fan speed High fan 60Hz 115V 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valve Outdoor inlet air DB temp F C 2 Operating current performance chart Operating current A 25 30 35 40 Outdoor inlet air DB temp F C 3 Indoor discharge air performance chart 68 2 SC 5 59 p ERE 2 50
21. oe youd uoisu dsns suoisueuuip 009 8 S E2 youd uoisuedsng VES 26 1 12 SUOISUBWIP Buiuedo Bulog 009 8 S 2 V Unit inch mm 18 Outdoor Unit CU KE12NK1 21 3 16 3 19 32 10 13 16 PHA 3 19 32 10 7 16 265 11 13 32 12 7 16 Wide tube service valve dia 3 8 9 52 Narrow tube service valve dia 1 4 6 35 28 11 32 720 2 1 8 21 9 16 548 Hu Unit inch mm 852 0 0010 12700 0 19 Outdoor Unit CU KE18NKU 23 15 16 5 11 32 11 17 32 Wide tube service valve dia 1 2 12 70 Narrow tube service valve dia 1 4 6 35 34 21 32 880 2 17 32 Unit inch 852 0 0010 13200 0 20 4 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram Indoor Unit CS KE12NB41 amp CZ 18BT1U Outdoor Unit CU KE12NK1 Indoor unit Outdoor unit x a Wide tube _ Accumulator d service pa D Di Wide tube 1 valve E AHi High pressure i OD Muffler Switch 3 8 IL x 9 52 mm gt AA 4 way x I valve I 2 5 X I gt lt I SS 5 d 1 I Capillary tube for Ree Electric split flow 2 expansion tube valve service x Narrow tube valve u lt
22. the cylinder is 1 68 22 x 0 20 6 08 Ib 0 76 10 x 0 20 2 76 Kg For the remaining refrigerant refer to the instructions of the refrigerant manufacturer If using a charging cylinder transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder Prepare an evacuated charging cylinder beforehand CAUTION To prevent the composition of R410A from changing never bleed the refrigerant gas into the atmosphere while transferring the refrigerant Fig 3 Do not use the refrigerant if the amount in the charging cylinder is less than 20 66 Configuration and characteristics of cylinders Single valve Charge liquid refrigerant with cylinder in up side down position Fig 1 Single valve with siphon tube Charge with cylinder in normal position Fig 2 L Charging cylinder Refrigerant cylinder Fig 3 11 6 In Case Refrigerant is Leaking CAUTION Never attempt to charge additional refrigerant when refrigerant has been leaking 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 2 Recovering refrigerant Never release the gas to the atmosphere recover residual refrigerant using the refrigerant recovery unit for R410A instead Do not reuse the r
23. the power box Fig 12 Screw Power box cover Terminal Ground cable Power lines Signal line 4 Disconnect the connector 7 DP 2P in the power box Fig 13 Remove a screw and disconnect the ground cable Fig 13 5 Disconnect the connector DCM 6P in the power box Fig 14 6 Remove the 4 screws and remove the power box Fig 14 7 Disconnect the connectors FS and 9 COIL 1 2P in the control box Fig 15 8 Remove the 2 screws and remove the control box Fig 15 Screw CN03 Screw For the removal of the following components perform any work after removing the indoor unit main body from the ceiling Main body lower section Heat exchanger sensor Drain pump Float switch Turbo fan Fan motor Heat exchanger 1 Perform the work after draining the water to prevent the water leakage from the drain pan Put a bucket etc under the drain cap and remove the drain cap to drain the water Fig 16 2 Refer to the installation instructions for recovery of refrigerant or removal of the power cable or tubing 7 3 6 Remove the main body lower section 1 Remove the 4 screws Fig 16 2 Remove the 2 screws Fig 17 3 Disconnect the connector 6P in the power box Fig 18 4 Lift the main body lower section and remove it from the main body upper section Screw Screw Drain cap Main body lower sec
24. 9 3 Checking the Indoor and Outdoor Units 53 9 4 Trouble Diagnosis of Fan Motor 57 9 5 Noise Malfunction and Electromagnetic Interference 59 10 CHECKING ELECTRICAL COMPONENTS 10 1 Measurement of Insulation Resistance 60 10 2 Checking Continuity of Fuse on PCB ASSY 61 11 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11 1 Characteristics of New Refrigerant R410A 62 11 2 Checklist before 63 11 3 Tools Specifically for R410A ___6_6 _ _ 64 11 4 Tubing Installation Procedures 64 11 5 In Case of Compressor Malfunction 65 11 6 In Case Refrigerant 67 11 7 Charging Additional Refrigerant 68 1148 IG EUS ING oy EE 68 APPENDIX Operating Instructions A 1 CS KE12NB41 amp CZ 18BT1U CU KE12NK1 CS KE18NB4UW amp CZ 18BT1U CU KE18NKU APPENDIX B INSTALLATION INSTRUCTIONS a r A 2 CS KE12NB41 amp CZ 18BT1U CU KE12NK1 CS KE18NB4UW amp CZ 18BT1U CU KE18NKU APPENDIX C Operating Instructions EE A 3 CZ RD515U APPENDIX D INSTALLATION INSTRUCTIONS a r A 4
25. DATA SUBJECT TO CHANGE WITHOUT NOTICE 14 2 2 2 Outdoor Unit Outdoor Unit CU KE12NK1 Control PCB CB CU KE12NK1 Control Circuit Fuse 125V 25A Compressor DC Rotary Hermetic Compressor Model Nominal Output G4C090LU1ER 900W Compressor Oil Amount Pints cc FV50S 0 68 320 Coil Resistance Ambient Temp 68 F 20 C Ohm Safety Device CT Peak current cut off control Yes Compressor Discharge Temp Control Yes Yes Operation cut off control in abnormal ambient Temp Yes Overload Relay Model CS 7L115 Operation Temp Open 239 F 115 C Close 203 F 95 C Run Capacitor Micro le VAC Crankcase Heater 115V 20W Propeller Q ty Dia inch mm 1 D15 3 4 D400 Coil Resistance RED 77 5 Ambient Temp 68 F 20 C WHT BLU 77 5 BLU RED 77 5 Type Internal Controller Over Current Protection Yes Run Capacitor Heat Exchanger Coil Fins par inch Face Area m External Acrylic baked on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE Outdoor Unit CU KE18NKU Control PCB CB CU KE18NKU Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output C 6RVN93HOM 1 050W Compressor Oil Amount Pints cc FV50S 0 74 350 Coil Resistance Ambient Temp 68 F 20 C Ohm Safety Device CT Peak current cut off control Yes Compressor
26. F C Area Automatic capacity control When the temperature rises above Point A the operation frequency is reduced at a specified rate 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 a area The compressor will stop if the temperature of the compressor discharge exceeds 248 F 120 C due to shortage of gas or other reason H Defrost detection and release e Reverse Cycle Defrosting Defrosting Sequence Heating operation e Outdoor fan ON 4 way valve ON Defrost detection occurs in either of the following cases The temperature of the heat exchanger remains at or below the L1 line for 3 minutes after the start of HEAT operation e The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation Outdoor heat exchanger temp Ambient temp Frosting area Reverse cycle defrosting operation e Compressor 1 minute after it is stopped compressor is ON e Outdoor fan OFF e Indoor fan OFF e 4 way valve gt OFF e Operation lamp Repeatedly switches between red and orange illumination Releasing of defrosting e Outdoor heating exchanger temp is over 68 F 20 C Defrosting operation lasts 12 minutes maximum 2 minutes after it is stopped compressor is ON 4 way valve is ON Outdoor fan is ON NOTE
27. FLAP 5P CN12 RC 4P and CN13 IND 7P Fig 5 Control PCboard CN13 CN12 Screw Control box cover Fig 4 Fig 5 40 7 3 3 Remove the ceiling panel 1 Open the clamp 4 locations and remove the 2 lead wires from the clamps Fig 6 2 Remove the 4 screws fixing the corner cover at 3 locations and indicator cover at 1 location Fig 6 3 Press the center 1 of the cover and remove the cover with the section 2 pulled down Fig 7 4 Remove the strap 3 locations from the hook on the ceiling panel Fig 8 There is no strap on the indicator cover 5 Remove the bolt 4 locations with a washer and remove the ceiling panel Fig 9 Corner cover Lead wire Pull down section 2 Cover Indicator Cover Center 1 Corner cover Corner cover Fig 7 Bolt Strap Remove the strap from the hook Bolt Fig 8 Fig 9 41 7 3 4 Remove the indoor air temperature sensor 1 Disconnect the connector CN08 ROOM 2P in the control box and remove the indoor air temperature sensor Fig 10 Indoor air temperature sensor CNO8 mE r II I I VICE 1 2 Fig 10 7 3 5 Remove the power box and control box 1 Remove a screw and remove the terminal cover Fig 11 2 Remove the 2 screws and remove the power box cover Fig 11 3 Disconnect the power lines No 1 and No 2 signal line No 3 and ground cable from the terminals in
28. Fan motor rotation speed does not change during indoor unit operation Trouble symptom 5 Fan motor rotation speed varies excessively during indoor unit operation Remedy for symptom 3 to 5 It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble Therefore first replace the indoor unit controller then if necessary replace the DC motor 57 9 4 2 Outdoor Fan Motor This outdoor DC fan motor contains an internal control PCB Therefore it is not possible to measure the coil resistance and the following procedure should be used to check the motor Perform the trouble diagnosis by Test Run mode described on Installation Instructions Important A Turn OFF the power before connecting or disconnecting the motor connectors B When performing voltage measurement at the outdoor controller connector for 3 in the table below the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started For this reason to measure the voltage again first turn OFF the outdoor unit power then measure the voltage in Test Run mode Trouble symptom 1 The fan does not stop when the outdoor unit stops 2 Outdoor unit controller trouble Trouble symptom 2 The fan motor does not rotate when the outdoor unit is operating Diagnostic procedure Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor unit controller 3 locati
29. H1 CU KE18NKU Model TKS292B 40 30 NLLL LLLI si NP L LI m se _ L LLL IDE st 14 23 32 41 50 59 68 20 15 10 5 0 5 10 15 20 Temperature F gt Resistance k ohm 17 CS KE12NB41 amp CZ 18BT1U CS KE18NB4UW amp CZ 18BT1U 3 DIMENSIONAL DATA Indoor Unit eq 1 HUN eui pue ued eui 1261000 IM 00 1 04 uoisuedsns ey J 1uBu ye y ui UMOUS se HUN y Jo 5 1 BU 10W JO 22 12 91 2 JO deb e si 3194 os eq pinoys sijoq uoisuedsns oun eu VG ch O C3 N O N 2 CE GC CL 5591 c 1 uey 5507 9L LL 9 91 9 9 sees GZS 8 9 22 GZS 8 6 22 8 Sp YBJUI 4594 ejou B L L X Z L v ejou UOISU dsng uod Ajddns 1 L uolo uuoo eqni ueq peavey 1 eqni seb Buigny GIL eqn Buiqny Jenno N ok 1 C3 N Co
30. LLARY TUBE 06 DISCHARGE TEMP 3 INSUFFICIENT GAS 4 CONTINUOUS OVERLOAD OPERATION OVERHEATING PREVENTION 5 O D FAN NOT OPERATING 6 O D PCB FAILURE 1 FAN MOTOR FAILURE 2 CONNECTOR CONTACT FAILURE 2 OPERATION TROUBLE D PCB FAILURE 4 WAY VALVE SWITCHING 1 4 WAY VALVE FAILURE HEAT PUMP MODEL ONLY Eos TROUBLE 2 0 D PCB FAILURE ZERO CROSS TROUBLE iK E09 GAS LOSS PREVENTION 1 SERVICE VALVE NOT OPENED 2 INSUFFICIENT GAS DC COMPRESSOR DRIVE E10 CIRCUIT TROUBLE _ 1 OPEN PHASE 2 O D PCB FAILURE E11 1 FAN MOTOR FAILURE 2 CONNECTOR CONTACT FAILURE O D DC FAN OPERATION TROUBLE 3 PCB FAILURE O D SYSTEM COMM FAILURE MIS WIRING 2 BLOWN FUSE OPEN PHASE O D FREEZING COMPRESSOR FAILURE E12 OLR OPERATION O D POWER POWER RELAY FAILURE 4 O D PCB FAILURE o PPP PES EES es foe e e beef eje e e elope x x een BLINKING 3 SEC INTERVAL FLOAT SWICTH FS IS ACTIVED 1 DRAIN PUMP FAILURE 2 FS FAILURE 3 CHOKED DRAIN HOSE 8512 5261 99100 1 52 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 Replace the controller board or the fuse 9 3 Checking the Indoor and Outdoor Units 1 Checking the indoor unit rm Check tem
31. NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU Cooling Characteristics RH 46 Indoor fan speed High fan 60 2 230V 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valv 86 95 25 30 35 Outdoor inlet air DB temp F C 2 Operating current performance chart WS Operating current 77 86 95 25 30 35 Outdoor inlet air DB temp F C 3 Indoor discharge air performance chart oF Indoor T OI m n T Indoor discharge air temperature F C 25 80 35 Outdoor inlet air DB temp F C S ARTI iue Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value 25 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU B Heating Characteristics RH 85 Indoor fan speed High fan 60Hz 230V 1 High pressure performance chart psig MPaG HN NL eo TTT EE 1 5 23 32 41 50 59 68 77 5 O 5 10 15 20 25 Outdoor inlet air DB temp F C High pressure at wide tube service valve 2 Operating current performance chart o S TIL Le ID Tr ili Operating current A 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor inlet air DB temp F C 3 Indoor discharge air performance chart 131 Indoor discharge air temperature F C 5
32. NSOR TROUBLE 2 POOR CONTACT AT CONNECTOR OR OPEN IID HEAT EXCHANGER TEMP CIRCUIT AT TERMINAL PRESS FIT LOCATION 502 SENSOR TROUBLE 3 I D PCB FAILURE I D INDOOR COMPRESSOR TEMP SENSOR 1 OPEN OR SHORT CIRCUIT IN SENSOR 504 TROUBLE 2 POOR CONTACT CONNECTOR OR OPEN CIRCUIT AT TERMINAL PRESS FIT LOCATION 505 TEMP 3 O D PCB FAILURE O D OUTDOOR 506 O D AIR TEMP SENSOR TROUBLE 507 O D CURRENT SENSOR ERROR O D PCB FAILURE 1 D O D COMMUNICATION 1 MIS WIRING 2 AC POWER FAILURE 3 BLOWN FUSE E01 TROUBLE 4 POWER RELAY FAILURE 5 OR O D PCB FAILURE SERIAL COMMUNICATION 6 O D FAN MOTOR FAILURE 7 REACTOR FAILURE TROUBLE HIGH PRESSURE SW FAILURE 9 OLR FAILURE 10 MAGNETIC COIL FAILURE HIC OR POWER TR FAILURE 2 O D FAN NOT OPERATING Eoo HIC CIRCUIT TROUBLE INSTANTANEOUS POWER STOPPAGE 4 SERVICE VALVE NOT OPENED POWER TR CIRCUIT TROUBLE O D FAN BLOCKED 6 CONTINUOUS OVERLOAD OPERATION COMPRESSOR FAILURE 8 O D PCB FAILURE poa UNIT EXTERNAL ROM 1 EXTERNAL ROM DATA FAILURE 2 O D PCB FAILURE TROUBLE 1 INSTANTANEOUS POWER STOPPAGE 2 OR POWER TR FAILURE E04 CURRENT PEAK CUT 3 O D PCB FAILURE N Eos PAM CIRCUIT TROUBLE 1 O D PCB FAILURE ACTIVE CIRCUIT TROUBLE 2 O D POWER VOLTAGE TROUBLE COMPRESSOR 1 ELECTRIC EXPANSION VALVE FAILURE 2 CHOKED CAPI
33. RATING RANGE RR 6 SPECIFICATIONS 2 1 Unit Specifications uaiuaaaaaaaaaaaaaaaaaaaaaaanaaanaaanaaanaaanaaannnannaannnanunannnannnannnannnannnaannaannannanannaaana 7 2 2 Major Component epes 13 2 3 Other Component Specifications 2 17 18 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram daneen bedenk he 21 PERFORMANCE DATA 5 1 Temperature En _______ _ 23 5 2 27 5 3 Cooling Capacity Low Ambient 29 e Reie Capa 31 ELECTRICAL DATA 6 1 Electrical Characteristics nnne nnns 33 6 2 Electric Wiring DIENS uuu uuu 35 MAINTENANCE 7 1 Address Setting of the Remote Control Unit 38 7 2 Disconnecting and Connecting Positive Connector for Outdoor Unit 39 1 3 u ___ _ _ 40 FUNCTIONS 8 1 Operation FUNCNONS 47 8 2 Protective Functions MEER RENE T 49 TROUBLESHOOTING BEFORE CALLING FOR SERVICE 9 1 Precautions before Performing Inspection or Repair 51 9 2 Meliod or Self DIGg08 08 51
34. TECHNICAL amp SERVICE MANUAL Panasonic CS KE12NB41 amp CZ 18BT1U CU KE12NK1 CS KE18NB4UW amp CZ 18BT1U CU KE18NKU DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No Product Code No Body Panel Body Panel Outdoor Model Product Code No CU KE12NK1 1 852 361 17 CS KE12NB41 CZ 18BT1U 1 852 361 05 1 852 361 15 CU KE18NKU 1 852 361 20 CS KE18NB4UW CZ 18BT1U 1 852 361 07 1 852 361 15 Panel CS KE12NB41 Body amp CZ 18BT1U Panel CS KE18NB4UW Body amp CZ 18BT1U Panel RS s 6 op exis LT Be CU KE18NKU Wired Remote Controller RAT Option REFERENCE NO SM700880 N SAFETY PRECAUTIONS Before doing repair work please read the SAFETY PRECAUTIONS carefully and fully understand them The precautionary items here are divided into N Warning and A Caution items Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly are included in the Warning table However even precautionary items identified NCaution also have the potential for serious consequences if not performed correctly Important safety precautions are described for all items in both categories Be sure to carefully follow all of them Symbol Indication A This symbol indicates items to which we need to
35. as the conventional refrigerant R22 11 1 2 Components mixing proportions HFC32 50 HFC 125 50 11 1 3 Characteristics Less toxic more chemically stable refrigerant The composition of refrigerant R410A changes whether it is in a gaseous phase liquid phase Thus when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant Therefore do not add new refrigerant Instead recover the remaining refrigerant with the refrigerant recovery unit Then after evacuation totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state in liquid phase 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 Ether type oil is used for compressor oil for R410A type units which is different from the mineral oil used for R22 Thus more attention to moisture prevention and faster replacement work compared with conventional models are required 62 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 convent
36. ation Green FAN operation Green DEFROSTING operation Red and Orange alternately OPERATION lamp Green TIMER lamp Green HIGH POWER lamp Green Timer backup Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation NIGHT SETBACK When NIGHT SETBACK operation is set the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep When NIGHT SETBACK operation is set O mark appears on the remote controller 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 1 when 30 minutes have passed after the selection was made and then another 2 F 1 C after another 30 minutes have passed regardless of the indoor temperature when night setback was selected This enables you to save energy without sacrificing comfort This function is convenient when gentle cooling is needed 2 F 1 C Setting temperature 2 F 1 ol L was Press the NIGHT 30 min 30 time SETBACK button HEAT mode When the night setback mode is selected the air conditioner automatically lowers the temperature setting 4 2 when 30 minutes have passed after the selection was made and then another 4 2 after another 30 minutes have passed regardless of the indoor
37. ation button on the indoor unit Fig 3 Perform the self diagnosis five seconds after the operation start Condition E12 Defect in the outdoor unit di 2 What is the latest self diagnosis result 4 PC board Condition E01 Outdoor Unit Outdoor Unit Turn off the power and wait until the power lamp LED of the outdoor unit controller is turned Remove the short circuit between the terminals 2 and 3 on the outdoor unit terminal strip Disconnect the cable from the terminal 3 on the indoor unit terminal strip Fig 4 Indoor Unit Indoor Unit Short circuit between the terminals 2 and 3 on the indoor unit Fig 4 Fig 5 terminal board Fig 5 1 Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit 2 Perform the self diagnosis five seconds after the operation start Condition E12 Defect or connection error What is the latest self diagnosis result in the inter unit cable Condition E01 Defect in the indoor unit P C board 55 3 2 Condition E12 Troubleshooting Serial Communication Outdoor Unit Turn off the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Disconnect the cable from the terminal 3 on the Outdoor unit terminal strip Fig 6 Indoor Unit Fig 6 Turn ON the power and operate the system using the remote controller or the operation b
38. ced by a certain proportion Area Frequency increase is prohibited When the temperature reaches Point C or above freezing prevention is ended and control is the same as in the a area When the temperature drops to below 36 F 2 C continuously for 2 minutes or longer the compressor stops Once the freeze condition is detected the air conditioner will work less than the maximum frequency until it is turned off 49 Cold air prevention during heating During heating the fan speed is set to LL very low or stopped As the temperature of the indoor heat exchanger rises the fan speed is changed to the set speed Set fan speed At stability of operation At start of operation LL Stopped Approx 104 40 7 86 25 30 Indoor heat exchanger temperature F C NOTE The fan speed is forcibly changed to LL beginning 30 seconds after the thermostat turns OFF At stability of operation refers to operation when the room temperature has approached the set temperature e When HEAT operation starts the indoor fan is stopped until the temperature of the indoor heat exchanger reaches 68 F 20 C or higher or until the room temperature reaches 59 F 15 C or higher H Compressor discharge temperature control This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature Compressor discharge temperature
39. ecovered refrigerant because its composition will have been altered 3 Welding leaking points e Confirm again that no residual refrigerant exists in the unit before starting welding Weld securely using flux and wax for R410A Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen N2 in the refrigerant circuit of the unit Leave ends of tubes open during welding 4 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 5 Evacuation Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back e The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly e When using a vacuum pump with exhaust air volume more than 0 883 cu ft min and ultimate vacuum pressure rate of 50 micron Hg Standard time for evacuation 1 Detect leaks OK 2 Recover refrigerant OK 3 Weld leaking points OK 4 Check for sealing OK 5 Evacuation OK 6 Recharge Length of tubing Less than 33 ft 10 m More than 33 ft 10 m More than 10 minutes More than 15 minutes 6 Recharging e Recharge unit in the same manner explained on the previous page 5 Recharging 67 11 7 Charging
40. ed Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle If air or other contaminants mix with the gas pressure will become extremely high in the refrigerating cycle Prohibit which may cause a unit breakdown When the welded section of the compressor intake or discharge pipe is to be disconnected perform it in a well ventilated place after sufficiently recovering the refrigerant gas Any residue gas may jet out refrigerant or refrigerating machine oil which may cause an injury When the work is to be performed in a high place About 2 meters or more make sure to wear a safety helmet gloves and safety belt Insufficient safety gear may cause a serious injury in case of a fall When the unit is to be relocated confirm that the new installation location has sufficient strength for the weight of the unit Insufficient strength of the installation location and incomplete installation work may cause injury due to the unit falling When the remote controller batteries are replaced dispose of the old batteries out of the reach of children If a child swallows a battery make sure that the child gets immediate medical attention Do not wash the air conditioner with water as this may cause an electric shock or fire N Prohibit For the repair work in places with high humidity or moisture make sure to ground the unit Failure to do so may cause an electric shock Confirm that the component attachme
41. er Over Current Protection Over Heat Protection Run Capacitor MiroF le O Drain Pump Model Q ty PLD 12115ST 1 1 Rating Voltage Hz AC115V 60Hz Input W Coil Resistance Ohm 101 10 Ambient Temp 68 20 Safty Device Type Thermal Fuse Open F 293 145 Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit Panel CZ 18BT1U Flap Motor Stepping Motor Model Q ty MPZN 12V 2 DC 12V Coil Resistance Ohm Each Pair of Terminal 380 7 Ambient 77 25 C DATA SUBJECT TO CHANGE WITHOUT NOTICE 13 Indoor Unit Body CS KE18NB4UW Control PCB CB CS KE18NB4U Control Circuit Fuse 250V 3A Q ty Dia and Length inch mm 1 012 5 8 L5 3 4 D322 L147 NoofPoes Coil Resistance Ambient Temp 68 F 20 C Type Thermal Fuse Over Current Protection Yes Over Heat Protection Yes Run Capacitor Micro le VAC ___ O Model Q ty PLD 12230ST 1 1 Rating Voltage Hz AC208 to 240V 60Hz Input W Coil Resistance Ohm 333 10 Ambient Temp 68 F 20 C Safty Device Type Thermal Fuse Open F C 293 145 Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit Panel CZ 18BT1U Flap Motor Stepping Motor Model Q ty MP24ZN 12V 2 DC 12V Coil Resistance Ohm Each Pair of Terminal 380 7 Ambient Temp 77 F 25 C
42. exhaust air volume more than 0 883 cu ft min and ultimate vacuum pressure rate of 50 micron Hg Standard time for evacuation 1 Recover refrigerant OK 2 Replace compressor OK 3 Check for sealing OK 4 Evacuation OK 5 Recharge Length of tubing Less than 33 ft 10 m More than 33 ft 10 m More than 10 minutes More than 15 minutes 65 5 Recharging 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 Cooling Operation CAUTION Never charge a large amount of liquid refrigerant at once to the unit This may cause damage to the compressor When charging with a refrigerant cylinder use an electronic scale for charging refrigerant In this case if the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to change Thus do not use the refrigerant if the amount in the charging cylinder is less than 20 Also charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit Example In case of charging refrigerant to a unit requiring 1 68 Ib 0 76 Kg using a capacity of a 22 Ib 10 Kg cylinder the minimum necessary amount for
43. he picture is distorted Keep the A C and wiring at least 1 meter 2 The antenna cable for a television or 2 Static occurs in the radio sound away from wireless devices and antenna cables radio is located close to the A C and A C wiring 3 Locations where television and radio signals are weak Change the wireless device s antenna to a high sensitivity antenna Change the antenna cable to a BS coaxial cable Use a noise filter for the wireless device Use a signal booster 59 10 CHECKING ELECTRICAL COMPONENTS 10 1 Measurement of Insulation Ground wire Resistance The insulation is in good condition if the resistance exceeds 1M ohm Probe 10 1 1 Power Supply Cord Insulation Clamp the grounding wire of power cord with the lead tester clip of the insulation resistance tester and measure the Fig 1 resistance by placing a probe on either of the two Terminal plate power wires Fig 1 Then also measure the resistance between the x 6 x eil grounding and other power terminals Fig 1 10 1 2 Indoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and dee 10 1 3 Outdoor Unit Clamp a metallic part of the unit with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate Fig 2
44. igh 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 Please pay attention to the points listed below 1 Noise malfunction This refers to the application of high frequency noise to the signal wires resulting in abnormal signal pulses and malfunction 1 Locations near broadcast stations where Either of the following trouble may occur The fundamental concept is to make the there are strong electromagnetic waves 1 The unit may stop suddenly during system less susceptible to noise 2 Locations near amateur radio short wave operation Insulate for noise or stations 2 Indicator lamps may flicker distance from the noise source 3 Locations near electronic sewing machines 1 Use shielded wires and arc welding machines 2 Move unit away from the noise source 2 Electromagnetic interference This refers to noise generated by high speed switching of the microcomputer and compressor This noise radiates through space and returns to the electric wiring affecting any wireless devices televisions radios etc located nearby 1 A television or radio is located near the 1 Noise appears in the television picture 1 Select a separate power source A C and A C wiring or t
45. ion 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 Refer to Method of Self Diagnostics for the self diagnostics procedure Operation Timer High Power gt 3 Off D iK Blinking D Muminated Before the Operation For terminal strip short circuit work or inter unit wiring removal turn off the power to N WARNING avoid an electric shock Release the terminal strip short circuit after the completion of self diagnostics Do not perform the short circuit work between any other terminals except for N CAUTION specified ones on the specified terminal strip lf such work is performed between the incorrect terminals the unit might be broken i uu ED w gt Convenient Tool for Short Circuit Work for example gt Alligator Clip Alligator Clip T lt Check Items before Troubleshooting Serial Communication Start gt After confirming that the following errors do not exist start the Troubleshooting Serial Communication in Condition E01 and E12 Mis wiring inter unit cable etc 6 Reactor failure defective insulation etc AC power failure 7 High Pressure Switch failure Blo
46. ional flare tool is used make sure to observe A Specification amount of extrusion by using the flare spacer Specification A Diameter of tube D Flare tool for R410A Conventional flare tool for R22 Dia 1 4 6 35 mm Dia 3 8 9 52 mm 0 to 0 0196 0 0472 Dia 1 2 12 7 mm O to 0 5 mm 1 2 mm Dia 5 8 15 88 mm e Size of flare Flare tool for R410A Conventional flare tool R22 Tubing precautions Refrigerant R410A is more easily affected by dust or moisture compared with R22 thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation Never use 0 0276 0 7 mm thick copper tubing or tubing which is less than 0 0315 0 8 mm in thickness since air conditioners with R410A are subject to higher pressure than those using R22 and R407C No addition of compressor oil for R410A No additional charge of compressor oil is permitted No use of refrigerant other than R410A Never use a refrigerant other than R410A e If refrigerant R410A is exposed to fire Through welding etc toxic gas may be released when R410A refrigerant is exposed to fire Therefore be sure to provide ample ventilation during installation work e Caution in case of R410A leak Check for possible leak points with the special leak detector for R410A If a leak occurs inside the room immediately provide thorough ventilation 63 11 3 Tools Specifically for R410A For servici
47. ng use the following tools for R410A Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant recovery unit Tools specifically for R410A Vacuum pump with anti reverse flow 1 Solenoid valve installed type which prevents oil from flowing back into the unit when the power is off is recommended Vacuum pump 2 can be used if the following adapter is attached e Vacuum pump adapter reverse flow prevention adapter 3 Solenoid valve installed adapter attached to a conventional vacuum pump Electronic scale for charging refrigerant Flare tool Bender Tools which can be com Torque wrench monly used for R22 R407C and R410A Cutter reamer Welding tool nitrogen gas cylinder The above tools specifically for R410A must not used for R22 and R407C Doing so will cause malfunction of the unit For the above vacuum pump 1 2 and vacuum pump adapter 3 those for R22 type units can be used for R410A type However they must be used exclusively for R410A and never alternately with R22 and R407C To prevent other refrigerants R22 R407C from being mistakenly charged to this unit shape and external diameter of the service port screw has been altered lt External diameter of service port gt R410A 5 16 R22 R407C 1 4 11 4 Tubing Installation Procedures When the tubes are connected always apply HAB oil on the flare portions to improve
48. ng in the remote controller clock display area 4 Each time the 1 HR TIMER button is pressed the display changes as shown below Press this button 2 times to change the display to 7 address setting Fig 3 b Test run mode 34 Self diagnostic mode ur a U d Address setting mode 5 oP 7 has now been selected for address setting 6 Press the ON OFF operation button on the remote controller Fig 3 Check that the beep signal received sound is heard from the second indoor unit approximately 5 times The sound you hear is the signal that the remote controller address has been changed 7 Finally press the remote controller ACL reset button to cancel the blinking oP 7 display Fig 3 Changing of the second remote controller address is now completed 38 ACL button Fig 2 OND D F AM 20 00 OD OD eos HGH ON 1 OFF O POWER SN DIE o operation Z button HIGH POWER 1 oO HT LA TIMER ae button SPEED MODE FLAP NIGHT SETBACK TIMER CD C A w A hd gt C CANCEL C gt ACL SENSOR 1244 24H Reset ADR ACL n tton Ez A Leao 10 N C Fig 3 7 2 Disconnecting and Connecting Positive Connector for Outdoor Unit One of the two types of connectors illustrated at left is u
49. nt position wiring condition soldering condition and connector connection are normal If not it may cause overheating or fire Confirm that the temperature around the compressor is not too high and then perform the repair work Failure to do so may cause a burn Perform welding work in a place with good ventilation If the work is performed in a poorly ventilated area it might cause a lack of oxygen If the installation plate or attachment frame has deteriorated due to corrosion etc replace it Failure to do so may cause an injury due to the unit falling When the cleaning is to be performed make sure to turn off the power and pull out the plug Touching the fan that is rotating at high speed may result in an injury When the indoor unit is to be removed do not place it on an incline S Doing so may cause wet furniture because water left inside may trickle down Prohibit Do not hold the sharp end of the unit or the aluminum fins as it may cause an injury to your hand or finger S Prohibit After repairs make sure to measure the insulation resistance and confirm that the value is 1 Mohm or more Any insulation error may cause an electric shock After repairs make sure to check the drainage of the indoor unit Inappropriate drainage may cause wet furniture and floors due to water leakage Table of Contents Page NSAFETY PRECAUTIONS n nn nanan aaa 2 TABLE OF CONTENTS soennieten seeden 4 OPE
50. ons Measurement location 1 Vs Gnd Between pin 1 and pin 4 DC 110V or more 2 Vcc Gnd Between pin 5 and pin 4 DC 14V or more 3 Vsp Gnd Between pin 7 and pin 4 After fluctuating 4 times between DC 1 0 to 4 3V 1 sec ON and DC 0 V 1 sec OFF the DC motor trips Diagnostic results All of the above measured values are normal Fan motor trouble Replace the motor Any one of the above measured values is not normal Outdoor unit controller trouble Replace the controller Reference DC motor connector pin arrangement Pin 1 Vs white Pin 2 Not used Pin 3 Not used Pin 4 Gnd black Pin 5 Vcc red Pin 6 FG blue Pin 7 Vsp yellow Trouble symptom 3 Motor rotates for some time several seconds but then quickly stops when the outdoor unit operates There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller Trouble symptom 4 Fan motor rotation speed does not change during outdoor unit operation Trouble symptom 5 Fan motor rotation speed varies excessively during outdoor unit operation Remedy for symptom 3 to 5 It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble Therefore first replace the outdoor unit controller then if necessary replace the DC motor 58 9 5 Noise Malfunction and Electromagnetic Interference An inverter A C operates using pulse signal control and h
51. oom temperature and automatically switches to Cooling or Heating mode Room temp gt Set temp COOL Room temp Set temp HEAT As shown by the example in the figure below with AUTO cooling heating operation the mode changes between Heating and Cooling mode according to changes in the relationship between the current room temperature and the set temperature Example Example of operation in AUTO mode with the set room temperature control e In order to further improve inverter performance control is Room temp switched between PWM control at low operation speeds and PAM control at high operation speeds making the most effective use of power Set temp Compressor OFF 47 This function acts to raise the power but keeps the AC system in the same operating mode This function is set with the HIGH POWER button on the remote controller It can be set regardless of the temperature and fan speed settings HIGH POWER operation from remote controller The unit operates at maximum output for 30 minutes regardless of the desired temperature The fan speed is 1 step above High Frequency 30 min 5 min V Start End NOTE When HIGH POWER operation ends the unit operates at low Hz for 5 minutes regardless of the thermostat OFF conditions When in DRY mode operation is in the cooling zone Lamp colors OPERATION lamp HEAT operation Red DRY operation Orange COOL oper
52. or Horizontal Vertical Operation Sound Indoor Hi Me Lo dB A 44 40 36 Outdoor Hi dB A 51 52 Refrigerant Tubing Connections Refrigerant Narrow ube oh mm Tube Diameter Wide tube inch mm 11 Indoor Unit CS KE18NB4UW amp CZ 18BT1U Outdoor Unit CU KE18NKU lt 208V gt Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit CZ KE18NB4UW amp CZ 18BT1U CS KE18NB4UW CZ 18BT1U Unit Dimensions Height Package Dimensions Height j Sd 18782 20 _4 18 105 _____ 243 16 630 26 3 16 665 _____ 28 48 714 26 11 16 678 Weight Net Ib kg D Se Shipping Volume cuft m ______ 4 59 0 13 Outdoor Unit CU KE18NKU Unit Dimensions Heighi i 11 7 32 285 Package Dimensions Height i Weight Net Shipping Shipping Volume cuf DATA SUBJECT TO CHANGE WITHOUT NOTICE Dimensions amp Weight Outdoor Unit Remarks Rating conditions are Cooling Indoor air temperature 80 F DB 67 F WB Heating Indoor air temperature 70 F DB Outdoor air temperature 95 DB 75 WB Outdoor air temperature 47 DB 43 WB 12 2 2 Major Component Specifications 2 2 1 Indoor Unit Indoor Unit Body CS KE12NB41 Control PCB CB CS KE12NB4U Control Circuit Fuse 250V 3A Q ty Dia and Length inch mm 1 012 5 8 L5 3 4 D322 L147 OSS Coil Resistance Ohm Safety Device Type Internal Controll
53. pay attention In this triangle a definite precautionary item is described O This symbol indicates the item to be prohibited In or close to this circle a prohibited item is described This symbol indicates the items requiring special attention or instruction In or close to this circle a prohibited item is described e After doing repair work perform a test run to confirm that there are no abnormalities At the same time explain the precautions in use to the user N Warning Before performing an overhaul disconnect the power plug or power cable from the unit Performing the work with the power supplied to the unit may cause an electric shock When repair work or circuit inspection that requires power supply for the air conditioner is to be performed do not touch the charging section Doing so may cause an electric shock For the step up capacitor attached to the electric section perform the repair work after sufficiently discharging it Insufficient capacitor discharge may cause an electric shock Do not perform repair work on the electric sections with wet hands Doing so may cause an electric shock Do not start or stop the air conditioner by means of connecting or disconnecting the power plug Doing so may cause an electric shock or fire When conducting repair work only use components included in the parts list for the corresponding unit and perform the work with the appropriate tools Incorrect or poor repair work may
54. s unit operation Use the remote controller to operate the e The rated voltage must be present between inter unit wirings 1 and 2 unit in TEST run mode To determine Connect a 5 k ohm resistor between inter unit wirings 2 and 3 When the whether the mode is currently in voltage at both ends is measured approximately 12 to 15V DC must TEST run mode check the 3 indicator be output and the multimeter pointer must bounce once every 8 lamps on the unit If all 3 are blinking seconds the current mode is TEST run Or instead of measuring the voltage you can insert an LED jig and check that the LED flickers once every 8 seconds If there are no problems with the above then check the outdoor unit For the Test run procedure refer to the Appendix B Installation Instructions 2 Checking the outdoor unit N Gem Check items unit operation 1 Apply the rated voltage between outdoor e The control panel LED red must illuminate unit terminals L and N 2 Short circuit the outdoor unit COM terminal The compressor fan motor and 4 way valve must all turn on to the T RUN terminal f there are no problems with the above then check the indoor unit Using the TEST T RUN terminals TEST T RUN terminals T RUN Test run compressor and fan motor turn ON TEST MV Compresses time to 1 60th accelerates operation by 60 times faster than normal 53 3 Serial Communication Error Identificat
55. sed Their basic structure is the same for each How to Disconnect Hold the resin connector cover and pull the connector off You cannot disconnect the connector by pulling the wire since it is locked inside Always hold the cover to disconnect See illustration at left For the connector without the resin cover push the lock in the direction of 2 while pulling it off Pull the cover upward How to Connect In order to connect hold the resin cover of the connector and push it in Confirm the click sound for the inside lock When the cover is pulled upward the lock is released with the sequence of 1 and 2 39 7 3 Disassembly Procedure To avoid electrical shock hazard be sure to disconnect power before attempting to disassemble the unit e When a footstool etc is used for disassembling the indoor unit be careful not to fall down If you fall down you might be injured seriously 7 3 1 Remove the air intake grill 1 Slide the 2 latches each to the corresponding arrow direction Fig 1 and Fig 2 Open downward the air intake grill located on the latch side 2 Undo the air intake grill drop preventive hook Fig 3 Undo the 2 hinges for the grill and remove the air intake grill Latch Latch Air intake grill Hinge Fig 1 Fig 2 Fig 3 7 3 2 Disconnect the connectors in the control box 1 Remove the 2 screws and remove the control box cover Fig 4 2 Disconnect the connectors CN04
56. temperature when night setback was selected This enables you to save energy without sacrificing comfort This function is convenient when gentle heating is needed Setting EZ 4 F 2 C temperature 4 F 2 C Press the NIGHT 30 min 30 min time SETBACK button 8 2 Protective Functions During HEAT operation the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated Indoor heat exchanger A Control start B Control end Indoor heat exchanger temperature F C Area Automatic capacity control When Point A has been exceeded the operation frequency is reduced by a certain proportion Area Frequency increase is prohibited At Point B and below overload prevention is ended and control is the same as in the a area Freeze prevention During COOL or DRY operation freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below 1 Freeze prevention operation is engaged when the temperature of the indoor heat exchanger is below 43 F 6 C 2 Restart after freeze prevention operation occurs when the temperature of the indoor heat exchanger reaches 46 F 8 C or above Indoor heat exchanger temperature F C Area Automatic capacity control When the temperature drops below Point A the operation frequency is redu
57. the 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 Indoor unit controller trouble Trouble symptom 2 The fan motor does not rotate when the unit is operating Diagnostic procedure Disconnect the motor connectors and measure the voltage at the DC motor connectors on the indoor unit controller 3 locations Measurement location CS KE12NB41 CS KE18NB4UW 1 Vm Gnd Between pin 1 and pin 3 DC 130V to 195V DC 280V to 340V 2 Vcc Gnd Between pin 4 and pin 3 DC 15V 1096 3 Vs Gnd Between pin 5 and pin 3 Fluctuation between DC 1 8V to 5 7V Diagnostic results All of the above measured values are normal 2 Fan motor trouble Replace the motor Any one of the above measured values is not normal Indoor unit controller trouble Replace the controller Reference DC motor connector pin arrangement Pin 1 Vm red Pin 2 Not used Pin 3 Gnd black Pin 4 Vcc white Pin 5 Vs yellow Pin 6 PG blue Trouble symptom 3 Motor rotates for some time several seconds but then quickly stops when the indoor unit operates There is trouble in the system that provides feedback of motor rotation speed from the motor to the indoor unit controller Trouble symptom 4
58. the sealing of tubing The following is the HAB oil generally used Esso ZERICE 532 For details on tubing installation procedures refer to the installation manuals attached to the indoor unit and outdoor unit 64 11 5 In Case of Compressor Malfunction CAUTION 9 Should the compressor malfunction be sure to make the switch to a replacement compressor as quickly as possible Use only the tools indicated exclusively R410A See 11 3 Tools Specifically for 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 refrigerant recovery unit for R410A Do not reuse the recovered refrigerant since it will contain impurities 2 Replacing Compressor e Soon after removing seals of both discharge and suction tubes of the new compressor replace it quickly 3 Checking for sealing e Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 4 Evacuation e Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back e The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly e When using a vacuum pump with
59. tion Main body lower section Screw p d Screw Fig 16 e Q Main body upper section A P A Screw O Fig 17 Fig 18 44 7 3 7 Remove the heat exchanger sensor 1 Remove the heat exchanger sensor from the sensor holder Fig 19 Heat exchanger sensor Holder Fig 19 7 3 8 Remove the drain pump and float switch 1 Remove the 2 screws Fig 20 2 Loosen the clamp and disconnect the drain hose from the drain pump Fig 20 3 Remove the drain pump from the main body upper section Fig 20 4 Remove a nut and remove the float switch Fig 21 Drain pump Float switch Drain hose Clamp Fig 20 Fig 21 45 7 3 9 Remove the turbo fan and fan motor 1 Remove a nut and remove the turbo fan Fig 22 2 Remove the 2 screws and 3 nuts and remove the fan motor Fig 23 Turbo fan Nut Fan motor Fig 22 Fig 23 7 3 10 Remove the heat exchanger 1 Remove the 3 screws Fig 24 2 Remove the 3 screws Fig 25 3 Remove the heat exchanger from the main body upper section with the heat exchanger lifted Heat exchanger Screw Screw Main body upper section Fig 24 Fig 25 46 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
60. utton on the indoor unit Perform the self diagnosis five seconds after the operation Start Condition E01 What is the latest self diagnosis result Defect in the outdoor unit P C board Condition E12 Outdoor Unit Turn off the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Disconnect the cable from the terminal 3 on the indoor unit terminal strip Fig 7 Indoor Unit Fig 7 Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit Perform the self diagnosis five seconds after the operation Start Condition E01 What is the latest self diagnosis result Defect in ue inter unit cable Condition E12 Defect in the indoor unit P C board 56 9 4 Trouble Diagnosis of Fan Motor 9 4 1 Indoor Fan Motor This indoor DC fan motor contains an internal control PCB Therefore it is not possible to measure the coil resistance and the following procedure should be used to check the motor e To perform diagnosis operate the unit in cooling mode with indoor fan speed High Next make sure that the indoor unit receive the signals from the remote controller when the ON OFF operation button is pressed Important A Turn OFF the power before connecting or disconnecting the motor connectors B When performing voltage measurement at the indoor controller connector for 3 in the table below
61. wer input 1 838 1 860 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 C DB Indoor Unit Outdoor Unit C TT Fan Motor Fan Motor Compressor Performance at 230V Single phase 60Hz Rating conditions Running amp 10 31 Power input 2 313 2 340 Rating conditions Indoor air temperature 70 F 21 1 C DB Outdoor air temperature 47 F 8 3 C DB 43 F 6 1 C WB Heating 2 Voltage 208V Cooling lt 208V gt Indoor Unit Outdoor Unit Complsie Iit Fan Motor Compressor P Performance at 208V Single phase 60Hz Rating conditions _ Running amp Power input 1 838 1 860 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 WB Outdoor air temperature 95 F 35 C DB Indoor Unit Outdoor Unit Fan Motor Compressor O SAT Heating Performance at 208V Single phase 60Hz Rating conditions _ Running amp Power input 2 313 2 340 Rating conditions Indoor air temperature 70 F 21 1 DB Outdoor air temperature 47 F 8 3 DB 43 F 6 1 C WB 34 iagrams D iring 6 2 Electric W CS KE12NB41 amp CZ 18BT1U Indoor Unit CS KE18NBAUW CZ 18BT1U c 0069v 0ScS cVJ8 ddTllOHlNOO 13A de qat HOLSIINH3H L 54 HOLIMS 1VO14 LHM dS LHM dZ LHM dv Ou ei iZ lejs v e e t rleiz E
62. wn fuse 8 Overload Relay failure Power Relay failure 9 Magnetic Coil failure defective insulation short circuit etc Outdoor Fan Motor failure defective insulation etc 10 Compressor failure defective insulation etc 3 1 Condition E01 Troubleshooting Serial Communication Outdoor Unit Indoor Unit _ M Fig 1 Fig 2 Is the voltage of about DC12V or more given between the terminals 2 and 3 on the outdoor unit terminal strip Serial Communication Line Fig 1 1 Turn OFF the power and wait until the power lamp LED No of the outdoor unit controller is turned OFF 2 Disconnect the cable from the terminal 3 on the indoor unit terminal strip Fig 2 3 Turn ON the power Yes A B Continued to the next page A Continued to the next page B 54 Continued from the previous page A Continued from the previous page B Is the voltage of about DC22V to 24V given between the terminals 2 and 3 on the indoor unit terminal strip Serial Communication Line Yes Defect or connection error Defect in the indoor unit in the inter unit cable P C board Outdoor Unit Turn OFF the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Short circuit between the terminals 2 and 3 on the outdoor unit terminal strip Fig 3 Indoor Unit Turn ON the power and operate the system using the remote controller or the oper

Panasonic CS-KE18NB4U Service Manual

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