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14.5.17 F91 (Refrigeration Cycle Abnormality)

Malfunction Decision Conditions

During cooling, compressor frequency = Fcmax.

During heating, compressor frequency > Fhrated.

During cooling and heating operation, running current: 0.65A < I < 1.65A.

During cooling, indoor intake - indoor pipe < 4°C.

During heating, indoor pipe - indoor intake < 5°C.

Multi Models Only

Gas shortage detection 1: A gas shortage is detected by checking the CT-detected input current value

and the compressor running frequency. During startup and operating of cooling and heating, input current
< 8.78/256 (A/Hz) x compressor running fre 0.25.

Gas shortage detection 2: A gas shortage is detected by checking the difference between indoor pipe

temperature and indoor intake air temperature during cooling and heating.

Malfunction Caused

Refrigerant shortage (refrigerant leakage).

Poor compression performance of compressor.

2/3 way valve closed.

Detection error due to faulty indoor intake air or indoor pipe temperature sensors.

Troubleshooting

Содержание CS-ME9PB4EA

Страница 1: ...ge during the installation or repairing of refrigerant circuit This service information is designed for experienced repair technicians only and is not designed for use by the general public It does no...

Страница 2: ...THE INDOOR UNIT 40 11 8 INSTALLATION OF DECORATIVE PANEL 41 12 Operation and Control 43 12 1 Basic Function 43 12 2 Airflow Direction 45 12 3 Quiet operation Cooling Mode Cooling area of Soft Dry Mod...

Страница 3: ...rent Device RCD Otherwise it may cause electrical shock and fire in case equipment breakdown or insulation breakdown 10 Do not use joint cable for indoor outdoor connection cable Use the specified ind...

Страница 4: ...luminium fin It may cause injury 5 Select an installation location which is easy for maintenance 6 Pb free solder has a higher melting point than standard solder typically the melting point is 50 F 70...

Страница 5: ...12 3 50 3 24 Indoor Noise H L dB A 35 28 Power Level dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 410 Lo C...

Страница 6: ...Heating Maximum C 30 Minimum C 16 1 Cooling capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95...

Страница 7: ...el dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 410 Lo Cool rpm 400 Heat rpm 440 Me Cool rpm 480 Heat rpm...

Страница 8: ...g capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb 2...

Страница 9: ...dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 410 Lo Cool rpm 400 Heat rpm 440 Me Cool rpm 480 Heat rpm 51...

Страница 10: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 11: ...dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 410 Lo Cool rpm 400 Heat rpm 440 Me Cool rpm 480 Heat rpm 51...

Страница 12: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 13: ...evel dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 460 Lo Cool rpm 400 Heat rpm 480 Me Cool rpm 480 Heat rp...

Страница 14: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 15: ...evel dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 460 Lo Cool rpm 400 Heat rpm 480 Me Cool rpm 480 Heat rp...

Страница 16: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 17: ...evel dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 460 Lo Cool rpm 400 Heat rpm 480 Me Cool rpm 480 Heat rp...

Страница 18: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 19: ...evel dB 48 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 350 Heat rpm 460 Lo Cool rpm 400 Heat rpm 480 Me Cool rpm 480 Heat rp...

Страница 20: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 21: ...evel dB 50 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 390 Heat rpm 470 Lo Cool rpm 430 Heat rpm 490 Me Cool rpm 510 Heat rp...

Страница 22: ...imum C 30 Minimum C 16 1 Cooling capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb...

Страница 23: ...evel dB 50 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 390 Heat rpm 470 Lo Cool rpm 430 Heat rpm 490 Me Cool rpm 510 Heat rp...

Страница 24: ...imum C 30 Minimum C 16 1 Cooling capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb...

Страница 25: ...evel dB 55 Indoor Fan Type Backward Fan Material ABS GF10 Motor Type DC 8 poles Input Power W Output Power W 40 Speed QLo Cool rpm 480 Heat rpm 560 Lo Cool rpm 510 Heat rpm 580 Me Cool rpm 605 Heat rp...

Страница 26: ...ng capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C Dry Bulb 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb...

Страница 27: ...23PBE for 1 room Easy to use remote control Quality Improvement o Random auto restart after power failure for safety restart operation o Gas leakage protection o Prevent compressor reverse cycle o Inn...

Страница 28: ...28 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control...

Страница 29: ...29 5 Dimensions 5 1 Indoor Unit...

Страница 30: ...30 6 Refrigeration Cycle Diagram...

Страница 31: ...31 7 Block Diagram...

Страница 32: ...32 8 Wiring Connection Diagram 8 1 Indoor Unit...

Страница 33: ...33 9 Electronic Circuit Diagram 9 1 Indoor Unit...

Страница 34: ...34 10 Printed Circuit Board 10 1 Indoor Unit 10 1 1 Main Printed Circuit Board...

Страница 35: ...floor to ceiling exceeds three meters air flow distribution deteriorates and the effect is decreased 4 The installation position must be able to support a load four times the indoor unit weight 5 The...

Страница 36: ...h circumstances where cutting oil mist or iron powder exist especially in factories etc 3 Avoid places where inflammable gas is generated flows in contaminated or leaked 4 Avoid places where sulphurou...

Страница 37: ...id bending and bending back the same piping point more than three times This will result in hardening of the pipe 5 After deforming the pipe align centers of the union fitting of the indoor unit and t...

Страница 38: ...When drain set piping install as shown in the figure below Drain Test The air conditioner uses a drain up motor to drain water Use the following procedure to test the drain up motor operation Connect...

Страница 39: ...l In this case add heat insulation material according to the following procedure o Heat insulation material to be prepared Adiabatic glass wool with thickness 10 to 20 mm o Stick glass wool on all air...

Страница 40: ...all be approved polychloroprene sheathed 4 x 1 5 mm2 flexible cord type designation 60245 IEC 57 or heavier cord Secure the connecting cable onto the control board with the holder clamper Ensure the c...

Страница 41: ...the screws 3 pcs before fitting move decorative panel as illustrated and tighten all the screws 4 pcs Check before hand the height from the ceiling to the unit The front grille fitting direction is d...

Страница 42: ...P Be caution not to clamp the cord in between control board and control board cover Be caution not to clamp the cord in between control board and control board cover 6 After complete install back remo...

Страница 43: ...arts remote control setting temperature will be taken as base value for temperature shifting processes These shifting processes are depending on the air conditioner settings and the operation environm...

Страница 44: ...to detect the indoor intake and outdoor air temperature The operation mode is decided based on below chart Every 30 minutes the indoor and outdoor temperature is judged Based on remote control setting...

Страница 45: ...ed by operation mode heat exchanger temperature and intake air temperature and manual angles of direction can be adjusted using remote control 12 2 1 Vertical Airflow Operation Mode Airflow Direction...

Страница 46: ...changed from normal setting to quiet setting of respective fan speed This is to reduce sound of Hi Me Lo for 3dB 2 Manual fan speed for quiet operation is 1 step from setting fan speed 3 Outdoor fan s...

Страница 47: ...r set will start operate earlier than the setting time This is to provide a comfortable environment when reaching the set ON time 60 minutes before the set time indoor at fan speed of Lo and outdoor f...

Страница 48: ...ON timer sampling If Timer LED is blinking there is an abnormality operation occurs 12 8 Drain Pump Control Operation To drain out the condensed water trapped in the drain pan in order to prevent the...

Страница 49: ...h remote control to set change the advance setting of air conditioner operation 3 REMOTE CONTROL NUMBER SWITCH MODE The Remote Control Number Switch Mode will be activated if the Auto OFF ON button is...

Страница 50: ...gnal with same transmission code from remote control This could prevent signal interference when there are 2 or more indoor units installed nearby together To change remote control transmission code s...

Страница 51: ...r and a fan The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions the standard values for them are shown in the table on the right Normal Pressure and...

Страница 52: ...Electric current during operation Low Pressure High Pressure Electric current during operation Insufficient refrigerant gas leakage Clogged capillary tube or Strainer Short circuit in the indoor unit...

Страница 53: ...button on the remote controller continuously for 5 seconds 3 will be displayed on the remote controller display Note Display only for No transmitting signal no receiving sound and no Power LED blinkin...

Страница 54: ...h until beep sound heard following by pressing the CHECK button at Remote Control Although operation forced to stop when abnormality detected emergency operation is possible for certain errors refer t...

Страница 55: ...ransmission is checked whether it is normal Malfunction Caused Faulty indoor unit PCB Faulty outdoor unit PCB Indoor unit outdoor unit signal transmission error due to wrong wiring Indoor unit outdoor...

Страница 56: ...re interconnected Malfunction Caused Wrong models interconnected Wrong indoor unit or outdoor unit PCBs mounted Indoor unit or outdoor unit PCBs defective Indoor outdoor unit signal transmission error...

Страница 57: ...tion Decision Conditions During startup and operation of cooling and heating the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors Malfunction Cause...

Страница 58: ...Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors Malfunction Caused F...

Страница 59: ...ons A current transformer CT is detected by checking the compressor running frequency rated frequency and CT detected input current less than 0 65A for continuously 20 seconds Malfunction Caused CT de...

Страница 60: ...termine abnormal fan motor feedback of rotation 2550rpm or 50rpm Malfunction Caused Operation stops due to short circuit inside the fan motor winding Operation stops due to breaking of wire inside the...

Страница 61: ...Decision Conditions During startup and operation of cooling and heating the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors Malfunction Caused...

Страница 62: ...Decision Conditions During startup and operation of cooling and heating the temperatures detected by the indoor heat exchanger temperature sensor 2 are used to determine sensor errors Malfunction Caus...

Страница 63: ...tion Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors Malfunction Caused Faul...

Страница 64: ...tion Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors Malfunction Caused Fau...

Страница 65: ...ion Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors Malfunction C...

Страница 66: ...ration is used to determine abnormal fan motor Malfunction Caused Operation stops due to short circuit inside the fan motor winding Operation stops due to breaking of wire inside the fan motor Operati...

Страница 67: ...pipe temperature sensor is above 60 C Malfunction Caused Air short circuit Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger 2 3 way valve closed Detection erro...

Страница 68: ...l takes place when indoor pipe temperature is lower than 2 C Malfunction Caused Air short circuit Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger 2 3 way valv...

Страница 69: ...nditions When heating operation when indoor pipe temperature is below 10 C When cooling operation when indoor pipe temperature is above 45 C Malfunction Caused Connector in poor contact Faulty sensor...

Страница 70: ...eration of cooling and heating when Power Factor Correction PFC protection circuitry at the outdoor unit main PCB senses abnormal high DC voltage level Malfunction Caused DC voltage peak due to power...

Страница 71: ...checking the CT detected input current value and the compressor running frequency During startup and operating of cooling and heating input current 8 78 256 A Hz x compressor running frequency 0 25 o...

Страница 72: ...on Decision Conditions A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit Malfunction Caused Compressor terminal disconnect F...

Страница 73: ...re data 61 C is detected by the outdoor pipe temperature sensor Malfunction Caused Air short circuit at indoor unit Dust accumulation on the indoor unit heat exchanger 2 3 way valve closed Faulty outd...

Страница 74: ...ed o Heat Sink Overheating During operation of cooling and heating when heat sink temperature data 90 C is detected by the heat sink temperature sensor Malfunction Caused IPM overheats due to short ci...

Страница 75: ...n of cooling and heating when compressor tank temperature data 112 C is detected by the compressor tank temperature sensor Malfunction Caused Refrigerant shortage refrigerant leakage 2 3 way valve clo...

Страница 76: ...detected by checking the input current value being detected by current transformer CT with the compressor running Malfunction Caused Over current due to compressor failure Over current due to defecti...

Страница 77: ...door unit PCB Troubleshooting Checking the power transistor Never touch any live parts for at least 10 minutes after turning off the circuit breaker If unavoidable necessary to touch a live part make...

Страница 78: ...bly of Parts 1 Open the Intake Grille from the Front Grille by moving the catchers to center Fig 1 Fig 1 2 Remove the Control Board Cover by removing the screws Fig 2 Fig 2 3 Release the Fig 3 o CN ST...

Страница 79: ...d it to the Control Board Fig 4 Fig 4 5 Remove the Front Grille by removing the screw A and screws B C D half way open Fig 5 Fig 5 6 Remove the Air Guider and Drain Pan complete by removing the screws...

Страница 80: ...80 8 Remove the Fan Motor by release the Fan Motor lead wire connectors and Fan Motor screws Fig 8 Fig 8...

Страница 81: ...81 16 Exploded View and Replacement Parts List 16 1 Indoor Unit...

Страница 82: ...82 Note The above exploded view is for the purpose of parts disassembly and replacement The non numbered parts are not kept as standard service parts...

Страница 83: ...R 1 CWD93C1050 22 SENSOR EVAPORATOR 1 CWA50C2549 23 HOLDER SENSOR 1 CWH32143 24 EVAPORATOR SUPPORTER 3 CWD911529A 25 TUBE ASS Y CAPIL TUBE 1 CWT07K1188 26 DRAIN PUMP COMPLETE 1 CWB53C1025 27 PANEL DRA...

Страница 84: ...ON 1 CWF615838 57 INSTALLATION INSTRUCTION 1 CWF615839 58 INSTALLATION INSTRUCTION 1 CWF615840 59 INSTALLATION INSTRUCTION 1 CWF615841 60 INSTALLATION INSTRUCTION 1 CWF615842 61 INSTALLATION INSTRUCTI...

Страница 85: ...85 16 2 CZ BT20E Front Grille Complete Note The above exploded view is for the purpose of parts disassembly and replacement The non numbered parts are not kept as standard service parts...

Страница 86: ...WH081007 10 BEARING 6 CWH641008 12 PLATE COVER FOR A S MOTOR 1 CWD911459 13 PLATE COVER FOR CONNECTING SHAFT 2 CWD911460 14 PLATE COVER FOR END SHAFT 1 CWD911461 21 ELECTRONIC CONT RECEIVER INDICATOR...

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