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E37

Outdoor heat exchanger

temperature sensor anomaly

1. Applicable model

5. Troubleshooting

All models

Diagnosis

Countermeasure

Is the

outdoor heat

exchanger temperature

sensor connector

connected

properly?

YES

Are the

characteristics of

outdoor heat exchanger

temperature

sensor

OK?

For the characteristics of outdoor heat exchanger

temperature sensor, see the following graph.

YES

Temperature-resistance characteristics

Temperature sensor resistance (k

Ω

)

Temperature (°C)

Ω

at 25°C

(Broken wire)

(Short-circuit)

Correct connector.

Defective outdoor heat

exchanger temperature

sensor

➞

Replace.

Defective outdoor unit

PCB

➞

Replace.

(Defective outdoor heat

exchanger temperature

sensor input circuit)

2. Error detection method

Detection of anomalously low

temperature (resistance) on

the outdoor heat exchanger

temperature sensor

3. Condition of error displayed

•

When the temperature sensor

detects -55 °C or lower for 5

seconds continuously within

2 minutes to 2 minutes 20

seconds after the compressor

ON, the compressor stops. After

3-minute delay, the compressor

starts again automatically, but

if this anomalous temperature

is detected 3 times within 40

minutes.

• When -55 °C or lower is

detected for 5 seconds

continuously within 20

seconds after power ON

4. Presumable cause

• Defective outdoor unit PCB

• Broken sensor harness or

temperature sensing section

• Disconnected wire connection

(connector)

Note:

Error code

Remote control:

LED

Green

Red

Content

Indoor

Stays OFF

Keeps flashing

'22 • PAC-SM-412

Содержание FDE125VNPWVH

Страница 1: ...arket only PAC SM 412 STANDARD INVERTER PACKAGED AIR CONDITIONERS SERVICE MANUAL CEILINING CASSETTE 4 WAY TYPE FDT125VNPWVH DUCT CONNECTED HIGH STATIC PRESSURE TYPE FDUA125VNPWVH DUCT CONNECTED HIGH S...

Страница 2: ...rrent cut 33 14 Outdoor unit failure 33 15 Serial signal transmission error protection 33 16 Rotor lock 33 17 Refrigeration cycle system protection 33 18 Silent mode 34 19 Broken wire detection on tem...

Страница 3: ...t lighting can be changed If the backlight is ON setting when the screen is tapped while the backlight is turned off the backlight only is turned on Operations with switches and are excluded USB port...

Страница 4: ...e Cover AIR CON No button Display the indoor unit number connected to this remote control CHECK button This button is used at servicing TEST button This button is used during test operation Weekly tim...

Страница 5: ...his is pressed once the air conditioner starts to operate and when this is pressed once again it stops operating MODE button Every time this button is pressed displays switch as below AUTO COOL HEAT F...

Страница 6: ...ntenance Service password The selected screen is displayed The selected screen is displayed Service Maintenance 2 Special settings CPU reset Microcomputers of indoor unit and outdoor unit connected ar...

Страница 7: ...tems are saved in the memory of indoor unit g Weekly timer peak cut timer or silent mode timer settings h Remote control function setting Please check the I U Set clock first on the initializing scree...

Страница 8: ...state of stop is memorized Although the timer mode is cancelled at the recovery from power failure the setting of weekly timer is changed to the holiday setting for all weekdays b Operation mode c Air...

Страница 9: ...shown at right 3 3 Cooling operation Setting room temperature Heating operation Room temperature detected with Thi A C 59 56 Heating operation stopped cooling Heating OK Indoor heat exchanger tempera...

Страница 10: ...g Heating 2 Operations of functional items during cooling heating Cooling Heating Dehumidifying Fan Operation Functional item Thermostat ON Thermostat ON Thermostat OFF Thermostat OFF Hot start Defros...

Страница 11: ...enabled disabled iv Set ON timer by clock Set the time to start operation The time can be set in the unit of 5 minute This setting can be switched only once or daily It is allowed also to set simultan...

Страница 12: ...emperature sensor Thi R1 or R2 whichever higher detects 25 C or lower the fan is turned OFF and does not operate ii When the heat exchanger temperature sensor Thi R1 or R2 whichever higher detects 25...

Страница 13: ...ignal from the remote control If the auto swing signal is received from the remote control the auto swing will start from the position before the stop b RC E5 i Louver control 1 Press the LOUVER butto...

Страница 14: ...mperature sensors both Thi R1 and R2 detect 25 C or lower 2 Indoor fan OFF is fixed for 5 minutes After the 5 minutes the indoor fan is operated at ULo for 2 minutes In the meantime the louver is cont...

Страница 15: ...fan on the indoor unit of which the thermostat has been turned OFF is turned OFF The same occurs also when the remote control sensor is effective As the operation time Total ON time of ON OFF switch a...

Страница 16: ...OFF releases the forced drain pump ON condition Normal state 1 2 Normal state Drain detection switch ON Stop 1 Indoor unit operation mode Control A Control B Compressor ON Compressor OFF Cooling Dry H...

Страница 17: ...with the anomalous stop E16 b If the fan motor fails to reach at 50 min 1 FDU FDUA 500 min 1 less than the required speed it stops with the anomalous stop E20 Compressor forced off temperature FDT onl...

Страница 18: ...ontinue to run as they are e Signal wiring procedure Signal wiring between indoor and outdoor units should be made on each unit same as the normal wiring For the group control connect the remote contr...

Страница 19: ...nTA CnT CnT CnTA CnT CnTA Operation stop pulse CnT CnT CnT CnTA CnT CnT CnTA CnT CnTA Operationpermission prohibitionlevel CnT CnTA CnT CnTA CnT CnTA CnT CnT CnTA CnT CnTA Operation permission prohibi...

Страница 20: ...ling heating 6 Forced thermo OFF Unit goes thermo off 7 Temporary stop Refer to 22 Temporary stop input 8 Silent mode Outdoor unit silent mode is activated ii In case of Pulse input setting Local sett...

Страница 21: ...F Operation Stop Operation permission 1 Operation prohibition Unit stops 1 Only the LEVEL INPUT is acceptable for external input however when the indoor function setting of Level input Factory default...

Страница 22: ...peration and Stop commands are not accepted b In case of CnT Operation permission prohibition level CnTA Operation permission prohibition level Operation prohibition zone is determined by the OR judgm...

Страница 23: ...s are inverted Cooling Heating or Heating Cooling d If the cooling heating selection signal is given by the external input the operation mode is transmitted to the remote control Selection of cooling...

Страница 24: ...ature by the return air temperature sensor and the measured temperature after installing the unit a It is adjustable in the unit of 0 5 C with the wired remote control indoor unit function RETURN AIR...

Страница 25: ...return air temperature According to temperature difference between set temperature and return air temperature indoor fan speed are controlled automalically Auto 1 Changes the indoor fan speed within...

Страница 26: ...the buttons shown item 2 while holding down the FUNCTION SETTING switch Use the selection buttons and to change the setting Press the SET button The buzzer on the remote control signal receiver beeps...

Страница 27: ...ours unit stops Compressor keeps stopped regardless of the set temperature Notes 1 When the following operations are set power saving control will be canceled Energy saving Home leave mode Warm up con...

Страница 28: ...sensor TH2 has detected lower than 10 C after starting the compressor during heating operation ii Detail of operation During the protection start II control the upper limit of compressor speed is res...

Страница 29: ...s When either of the following conditions is satisfied a The outdoor air temperature TH2 is 25 C or higher and fan speed is 15th speed or more b The compressor speed is 0 rps 4 Outdoor fan speed and f...

Страница 30: ...operated at 75 min 1 or lower for more than 30 seconds the compressor and fan motor are stopped a Starting conditions Defrost operation can be started only when all of the following conditions are sat...

Страница 31: ...limit of compressor speed is set to 30 or 40 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 30 or 40 rps However when the thermostat OFF th...

Страница 32: ...tdoor air temperature is C or D 2 Values in are for outdoor air temperature is E or F C D A B F E OFF Upper limit 50 rps Lower limit 40 rps ON ON Upper limit 60 rps Lower limit 30 rps Outdoor air temp...

Страница 33: ...nues operation for 20 seconds without changing then the speed is reduced again by 4 rps 3 If the discharge pipe temperature is in the range of 95 105 C even when the compressor speed is maintained for...

Страница 34: ...a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on 15 Serial signal transmission error protection a Purpose Prevents malfunction resulting from error on...

Страница 35: ...or stops After a delay of 3 minutes it restarts but if the same is detected repeatedly 3 times within 40 minutes the compressor stops with the anomalous stop Note 1 During defrost operation and for 3...

Страница 36: ...frigerant ejection control 2 minutes Compressor stop 1 minute Normal heating operation 2 When outdoor air temperature TH2 and discharge pipe temperature TH3 are in the control range B Refrigerant ejec...

Страница 37: ...nit control PCB Defective temperature sensor input circuit Replacement of PCB 1 time flash Keeps flashing Indoor return air temperature sensor Defective indoor return air temperature sensor defective...

Страница 38: ...Replacement of PCB Stays OFF Keeps flashing Discharge pipe temperature sensor Defective discharge pipe temperature sensor broken wire or poor connector connection Replacement repair of temperature se...

Страница 39: ...after initial detection of this anomalous temperature Indoor heat exchanger temperature sensor anomaly 50 C or lower is detected for 5 seconds continuously within 60 minutes after initial detection o...

Страница 40: ...zed in the remote control Resetting the memorized error log in the indoor unit The remote control transmits error log erase command to the indoor unit when VENTI button is pressed while holding down C...

Страница 41: ...els WARNING and CAUTION Both mentions the important items to protect your health and safety so strictly follow them by any means WARNING Wrong installation would cause serious consequences such as inj...

Страница 42: ...Parts mounting are different by the kind of PCB ON OFF Item Switch Address SW2 SW5 1 Content of control Plural indoor units control by 1 remote control Test run SW7 1 Normal Operation check drain pum...

Страница 43: ...ch that it will notpinch any of the wires Reconnect the wirings to the PCB Wiring connector color should match with the color of connector of the PCB Screw back the terminal Arrow A of the E2 wiring t...

Страница 44: ...an be damage if not properly tighten Recommended power transistor tightening torque 0 59 0 78N m ii Fan motor control PCB Parts mounting are different by the kind of PCB Model FDUA125VH PSC012D022 3 M...

Страница 45: ...ing the voltage DC between both terminals of electrolytic capacitor C58 Measurment of voltage may be disturbed by the moisture proof coating In such case remove the coating and measure it by taking ca...

Страница 46: ...service panel See No 1 2 Disconnect the EEV connector CNEEVx on PCB in control box 3 Remove the coil of EEV by pull out on the top 4 Remove welded part of EEV by welding mark 4 To remove the 4 way val...

Страница 47: ...ove 2 compressor fixing nuts mark using spaner or adjustable wrench 7 To remove the printed circuit board PCB 1 Remove the service panel and top panel 2 Take off 4 hooks of lid and remove it mark Pic...

Страница 48: ...L to N AC220 230 240V 1 to 2 N AC220 230 240V 2 N to 3 Normal if the voltage oscillates between DC 0 and approx 20V Voltage check point PCB ASSY PCB1 Voltage C93 15V voltage for fan motor control Vol...

Страница 49: ...311 Vdc at Vac 220V Power transistor module parts check Check by inverter checker or resistance measurement check by tester See page 52 and 53 for details Please See page 52 and 53 for details CNFAN...

Страница 50: ...0 230 240V 2 N to 3 Normal if the voltage oscillates between DC 0 and approx 20V L to N AC 220 230 240V U M BK WH RD V W PCB ASSY PCB1 M BK MS TRANSISTOR POWER POWER T 1A L 250V CM FMo W V U P N CNTH...

Страница 51: ...a i 2 Discharge pipe temperature anomaly P 144 a ii 3 Current safe control of inverter primary current P 146 g 4 High pressure protection control P 144 b i P 145 c i 5 High pressure anomaly P 144 b ii...

Страница 52: ...ng data Pressing the RESET button during remote control unit operation will undo your last operation and allow you to go back to the previous screen If two 2 remote controls are connected to one 1 ins...

Страница 53: ...ter probes in contact with the following places on each te rminal P Power transistor P terminal N Power transistor N terminal U End of red harness to compressor V End of white harness to compressor W...

Страница 54: ...rom compressor LED ON OFF pattern i Setup procedure of checker 1 Power OFF Turn off the breaker 2 Remove the terminal cover of compressor and disconnect the wires U V W from compressor 3 Connect the w...

Страница 55: ...omaly 71 E7 Return air temperature sensor anomaly 72 E8 Heating overload operation 73 E9 Drain trouble FDT FDU FDUA series 74 E10 Excessive number of connected indoor units more than 17 units by contr...

Страница 56: ...operating NO YES NO Note 1 Outdoor 35 CDB Indoor 27 CDB 19 CWB 1 WAIT It is normal This unit is designed to start in the soft start mode by detecting the under dome temperature of compressor when it r...

Страница 57: ...1 Outdoor 7 CDB Indoor 20 CDB 1 WAIT It is normal This unit is designed to start in the soft start mode by detecting the under dome temperature of compressor when it restart after power reset It is n...

Страница 58: ...r installation or when the unit has been left for long time without power source the insulation resistance may drop to a few M because of refrigerant migrated in the compressor When the earth breaker...

Страница 59: ...the gap if necessary Prevent the vibration from transmitting to wall and etc by fixing pipes on the wall or wrapping rubber cushion around the pipe which goes through the hole in the wall or applying...

Страница 60: ...ping of air conditioner It is likely to occur particularly during cooling or defrost operation in the heating mode It is normal The noise vibration occurs when the refrigerant starts or stops flowing...

Страница 61: ...air nitrogen etc In such occasion it is necessary to recover refrigerant vacuum dry and recharge refrigerant Since there could be many causes of noise vibration the above do not cover all In such cas...

Страница 62: ...cked Check at the indoor unit side LM louver motor Is the louver operable with the remote control YES NO Does the louver operate at the power on YES NO YES NO Operate after waiting for more than 1 min...

Страница 63: ...1 1 Note 1 for GND Is DC5V detected between of CNW2 NO Is AC220 240V detected between and 2 N on the terminal block of outdoor unit YES YES YES YES Is JX1 open Defective outdoor unit PCB Replace Misco...

Страница 64: ...tween of CNW2 Disconnect remote control wires NO Is DC15V or higher detected between X Y of indoor unit terminal block YES YES YES YES NO NO NO Correct it Replace wires Replace remote control Defectiv...

Страница 65: ...outdoor unit Power source reset NO YES YES NO NO NO NO NO YES YES YES Set one remote control for Master and the other for Slave YES Note 3 Only indoor unit with drain pump Set SW1 on remote control P...

Страница 66: ...wer on with remote control 3 Condition of error displayed Same as above 4 Presumable cause Improper setting Surrounding environment Defective remote control communication circuit Faulty indoor unit co...

Страница 67: ...ive outdoor unit PCB Replace Defective indoor unit control PCB Replace Replace indoor unit control PCB Correct connection wires between indoor and outdoor units Defective outdoor unit PCB Replace Defe...

Страница 68: ...he outdoor unit PCB YES Replace the reactor YES Is there a short circuit between phases of outdoor unit PCB Are there cracks or burning on the power transistor module or diode stack Is reactor the ano...

Страница 69: ...the outdoor units Is approx DC20V detected between 2 N on the outdoor unit terminal block NO Is approx DC20V detected between on the indoor unit terminal block NO YES NO YES YES YES Replace fuse Short...

Страница 70: ...ral environment Defective indoor unit control PCB Replace Move to E5 Communication error during operation Check 2 Error detection method When normal communication between the remote control and the in...

Страница 71: ...Inspect faulty connections disconnection looseness on the outdoor unit terminal block Power source reset Note 2 Check for faulty connection or breakage of signal wires between indoor outdoor units YES...

Страница 72: ...ensor Replace Defective indoor unit control PCB Replace Defective indoor heat exchanger temperature sensor input circuit 2 Error detection method Anomalously low temperature or high temperature resist...

Страница 73: ...ctive return air temperature sensor Replace Defective indoor unit control PCB Replace Defective return air temperature sensor input circuit 2 Error detection method Anomalously low temperature or high...

Страница 74: ...of indoor heat exchanger temperature sensor see the error display E6 YES NO YES NO Error stop Reset Indoor heat exchanger temperature C 56 63 Wash Defective indoor heat exchanger temperature sensor co...

Страница 75: ...NO YES NO Check float switch Correct it Connect connector Defective indoor unit control PCB Replace Check option equipment Correct setting to Humidifier drain pump motor interlock Defective indoor uni...

Страница 76: ...door units connected to one remote control NO YES Defective remote control Replace Reduce to 16 or less units 2 Error detection method When it detects more than 17 of indoor units connected to one rem...

Страница 77: ...indoor unit control PCB 2 Error detection method IU address has been set using the Master IU address set function of remote control 3 Condition of error displayed Same as above 4 Presumable cause Mist...

Страница 78: ...after replacing the fan motor replace the indoor unit control PCB Malfunction by temporary noise 2 Error detection method Detected by rotation speed of indoor fan motor 3 Condition of error displayed...

Страница 79: ...s when the power ON NO YES Defective indoor unit control PCB Defective SW7 Replace Turn SW7 1 on the indoor unit control PCB OFF and reset the power 2 Error detection method After indoor operation che...

Страница 80: ...If the error persists after replacing the fan motor replace the indoor unit control PCB Malfunction by temporary noise 2 Error detection method Detected by rotation speed of indoor fan motor 3 Conditi...

Страница 81: ...s again automatically but if this error occurs again within 60 minutes after the initial detection 4 Presumable cause Faulty connection of remote control temperature sensor Defective remote control te...

Страница 82: ...Isn t the air circulation of outdoor unit short circuited Are installation spaces adequate Isn t there any fouling or clogging on heat exchanger Control operation check Defective outdoor unit control...

Страница 83: ...or Insufficient refrigerant amount Recharge refrigerant by weighing proper amount on a scale Control operation check Defective outdoor unit PCB Replace Check unit side Isn t filter clogged Are indoor...

Страница 84: ...ective outdoor heat exchanger temperature sensor input circuit 2 Error detection method Detection of anomalously low temperature resistance on the outdoor heat exchanger temperature sensor 3 Condition...

Страница 85: ...emperature sensor input circuit 2 Error detection method Detection of anomalously low temperature resistance on outdoor air temperature sensor 3 Condition of error displayed When the temperature senso...

Страница 86: ...outdoor unit PCB Replace Defective discharge pipe temperature sensor input circuit 2 Error detection method Detection of anomalously low temperature resistance on the discharge pipe temperature sensor...

Страница 87: ...ound on the compressor YES YES YES Are the service valve gas side opened Open the service valve Defective outdoor unit PCB Replace Defective outdoor unit PCB Replace 2 Error detection method If the in...

Страница 88: ...ase of high pressure and or test run several times restarting may recover it because liquid refrigerant migrated in the compressor is discharged from the compressor Replace compressor 2 Error detectio...

Страница 89: ...service valves fully opened Is the filter clogged Is there any liquid flooding Is the superheat within normal range Is there any anoumalous sound on the compressor YES From previous page YES Defectiv...

Страница 90: ...ust fouling etc Defective outdoor unit PCB Replace 2 Error detection method Error is displayed if the converter voltage exceeds target voltage 3 times within 20 minutes Remote control may be set after...

Страница 91: ...displayed When actual rotation speed of outdoor fan motor drops to 75min 1 or lower for 30 seconds continuously the compressor and the outdoor fan motor stop After 3 minute delay it starts again auto...

Страница 92: ...sumable cause Note If the power transistor primary current exceeds the setting value for 3 seconds the compressor stops Power transistor primary current Faulty outdoor unit PCB Dust on outdoor unit PC...

Страница 93: ...ctive indoor heat exchanger return air temperature sensor input circuits 2 Error detection method Judge insufficient refrigerant amount by detecting the temperature differnce between indoor heat excha...

Страница 94: ...e 2 Error detection method 3 Condition of error displayed 4 Presumable cause Note Is outdoor ventilation condition good Inspect outdoor air temperature sensor Is it normal Is the refrigerant amount no...

Страница 95: ...it fails to change over to the rotor detection operation of compressor motor 3 Condition of error displayed If compressor fails to startup for 42 times 4 Presumable cause Faulty outdoor fan motor Faul...

Страница 96: ...displayed If it fails again to detect the rotor position after shifting to the compressor rotor position detection operation the compressor stops 4 Presumable cause Defective outdoor fan motor Defecti...

Страница 97: ...cation where easy wiring access to the power source is available Avoid locations where combustible gases may leak be produced flow or accumulate Select a level location that can bear the weight and pr...

Страница 98: ...ting of relays and damper motors Connect the damper motor cable to the relays as shown below Connect the power source of the damper motors to the terminal block 1 2 in the indoor control box as shown...

Страница 99: ...Disable Not present A common zone is a zone in which a damper is not installed Design the duct so that the common zone equals 50 of total air flow If this is acceptable tap the OK button Set the exis...

Страница 100: ...byte letters You can enter alphanumeric or Cyrillic Tap the Back or Next button to display next character group When you have finished inputting the room name tap Set The zone name that was set is di...

Страница 101: ...ge is incorrect Check 24V AC transformer Poor air flow External static pressure is not correct Ensure that air flow of common zone or spill zone equal 50 of total air flow If duct static pressure is t...

Страница 102: ...Displays the fan speed which is selected currently Tap this button to change the fan speed Timer button d e t a r e p o e b l l i w h c i h w r e m i t e h t f o s t n e t n o c t e s e r a s r e m i...

Страница 103: ...installed Spill zone A zone in which a damper open automatically In the heating mode when any damper is closed and the air volume of the indoor unit decreases the high pressure rise In order to preve...

Страница 104: ...ir conditioner starts at the set time Operating conditions at the start of operation can be set Only one day Once operation or operation Everyday can be set Set OFF timer by clock The air conditioner...

Страница 105: ...t in less than one hour a message Warming up cancelled is displayed on the screen This is used as the Set ON timer by hour and clock Advice Warming up Set ON timer by hour Set Back hours Tap to set cl...

Страница 106: ...previous screen 5 After the setting tap the Set button The display returns to the Timer menu screen Set ON timer by clock Starts the operation of the unit at the set clock time 1 Tap the Menu button o...

Страница 107: ...eration mode Fan Heating Dry Auto 7 d e e p s n a f d e r i s e d a p a T If the No setting button is tapped it operates at the last action 4 8 After setting the desired contents at the screen of the...

Страница 108: ...ngs Tapping the Zone button will display the set zone states Con rm 4 Tapping the Zones button will transition to the zone operation setting screen Set No setting ON OFF No setting OPEN CLOSE for each...

Страница 109: ...ore holidays can be set To enable the timer on the day set as holiday it is necessary to reset the holiday setting When tapping All Disable button the timer does not operate on all days of the week Wh...

Страница 110: ...to 60 minutes earlier in order to warm up the room temperature closed to the set temp at the set start time of operation Operation mode 8 Set temp 9 Fan speed 1 0 Set the operation mode before setting...

Страница 111: ...5 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 BK BK BK BK BK BK BK BK BK BL RD BR OR WH YE GN RD 12 12 12 3 Power source line Signal line 1 2 3 CNW3 WH 1 3 WH BL 2 0A 3 15A WH YE GN P...

Страница 112: ...WH BK RD WH RD BK 1 Option CNJ WH 11 12 6 7 2 1 20 16 17 Zone control Damper motor output For details refer to page 97 FS Float switch Indication lamp Red Inspection Indication lamp Green Normal oper...

Страница 113: ...ntrol Damper motor output For details refer to page 97 FS Float switch Indication lamp Red Inspection Indication lamp Green Normal operation LED 3 LED 2 Connector CNB Z Model capacity setting SW6 Oper...

Страница 114: ...13 14 15 16 17 18 19 20 CNJ WH BL PK BR OR RD 12 1 PIS CNG BL CNV2 BK 2 4 3 1 3 Option WH BK RD WH RD BK WH RD BK WH RD BK CNL1 WH CNL2 WH Prepare on site CNZ CNC For HA WH RD SW2 SW6 SW5 SW7 LED 2 LE...

Страница 115: ...les contained in a conduit and a voltage drop is 2 For an installation falling outside of these conditions please follow the internal cabling regulations Adapt it to the regulation in effect in each c...

Страница 116: ...essory 7 PIPING SYSTEM Preset point of the protective devices Parts name Mark Equipped unit FDT FDE FDU FDUA series Temperature sensor for protection overloading in heating Thi R1 or Thi R2 Indoor uni...

Страница 117: ...we reserve the right to make changes in all specifications without notice INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR CONDITIONERS Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS LTD Because of...

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