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Mitsubishi Electric SRK71VNPWZR, Service Manual

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Mitsubishi Electric SRK71VNPWZR Service Manual Download Page 1

(Split system, air to air heat pump type)

Manual No.'19

・

PAC-SM-312

STANDARD INVERTER PACKAGED

AIR-CONDITIONERS

SERVICE MANUAL

CEILINING CASSETTE-4 WAY TYPE

 FDT71VNPWVH

DUCT CONNECTED-LOW/MIDDLE
STATIC PRESSURE TYPE

 FDUM71VNPWVH

WALL MOUNTED TYPE

 SRK71VNPWZR

DUCT CONNECTED-HIGH STATIC
PRESSURE TYPE

 FDU71VNPWVH

CEILING SUSPENDED TYPE

 FDE71VNPWVH

Summary of Contents for SRK71VNPWZR

Page 1: ...RD INVERTER PACKAGED AIR CONDITIONERS SERVICE MANUAL CEILINING CASSETTE 4 WAY TYPE FDT71VNPWVH DUCT CONNECTED LOW MIDDLE STATIC PRESSURE TYPE FDUM71VNPWVH WALL MOUNTED TYPE SRK71VNPWZR DUCT CONNECTED HIGH STATIC PRESSURE TYPE FDU71VNPWVH CEILING SUSPENDED TYPE FDE71VNPWVH ...

Page 2: ...ntrol 44 11 Compressor overheat protection 44 12 Current safe 45 13 Current cut 45 14 Outdoor unit failure 45 15 Serial signal transmission error protection 45 16 Rotor lock 45 17 Refrigeration cycle system protection 45 18 Silent mode 46 19 Broken wire detection on temperature sensor 46 2 MAINTENANCE DATA 47 2 1 FDT FDU FDUM FDE series 47 2 1 1 Diagnosing of microcomputer circuit 47 1 Selfdiagnos...

Page 3: ...nosis table 112 6 Service mode Trouble mode access function 113 7 Inspection procedures corresponding to detail of trouble 121 8 Phenomenon observed after short circuit wire breakage on sensor 123 9 Checking the indoor electrical equipment 123 10 How to make sure of wireless remote control 125 11 Inspection procedure for blown fuse on the indoor unit PCB 125 3 ELECTRICAL WIRING 126 1 Indoor units ...

Page 4: ... backlight turns off automatically if there is no operation for certain period of time Lighting period of the backlight 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 USB connector mini B allows connecting to a personal computer For operating method...

Page 5: ...ent mode 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 timer display Displays the settings of the weekly timer Operation setting display area Displays setting temperature air flow volume operation mode and oparation message Operation check indicator l...

Page 6: ... once again it stops operating MODE button Every time this button is pressed displays switch as below AUTO COOL HEAT FAN DRY TEMP button Change the set temperature by pressing or button FAN SPEED button The fan speed is switched in the following order 1 speed 2 speed 3 speed 4 speed AUTO 1 speed U D button Used to determine the up down louver position ON TIMER button Used to set the ON TIMER OFF T...

Page 7: ...ts ON TIMER operation TIMER button This button is used for setting the current time and timer function ACL switch This switch resets the program to default state PROGRAM button This button sets WEEKLY TIMER HI ECO button This button changes the HIGH POWER ECO operation AIR FLOW LEFT RIGHT button This button changes the air flow left right direction SILENT button This button sets the SILENT operati...

Page 8: ...r temperatures 2 CPU reset Reset CPU from the remote control as follows TOP screen Menu Service setting Service Maintenance 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 are reset State of restoration after power failure 3 Power failure compensation functio...

Page 9: ...function items 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 screen set the timer Other thanA C is connected 4 Alert displays If the following a to c appear check and repair as follows Communication check screen This appears if communications cannot be est...

Page 10: ...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 flow volume mode d Room temperature setting e Louver auto swing stop However the stop position 4 position is cancelled so that it returns to Position 1 f Remote control function items which have been...

Page 11: ...med regardless of the temperature shown at right 3 3 Cooling operation Heating operation Room temperature detected with Thi A deg 59 56 Heating operation stopped cooling Heating OK Indoor heat exchanger temperature C b The following automatic controls are performed other than a above i Cooling or heating operation mode is judged according to the conditions of the Judgment based on Setting temperat...

Page 12: ...n air temperature and Outdoor temperature Heating Outdoor air tem perature Operation mode Heating 3 The outdoor air temperature of the above judgment conditions is sampled at every 10 minutes 4 In the range where the above cooling and heating zones are overlapped Forced thermostat OFF Forced thermostat OFF Forced thermostat OFF Room temperature Cooling Room temperature Heating Outdoor air temperat...

Page 13: ...up 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 activated only once or at every time It is allowed also to set simultaneously the indoor temperature operation mode air flow rate and warm up enabled disabled Note 1 It is necessary to set the clock to use this timer v Set OFF timer by clock Set the time to s...

Page 14: ...ature 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 C or higher the fan operates with the fan control at heating thermostat OFF iii When the heat exchanger temperature sensor Thi R1 or R2 whichever higher detects 35 C or higher the fan operates with the set...

Page 15: ...e 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 button to operate the swing louver when the air conditioner is operating SWING is displayed for 3 seconds and then the swing louver moves up and down continuously 2 To fix the swing louver at a position press one time the LOU...

Page 16: ...at exchanger temperature 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 controlled at level 3 After operating at ULo for 2 minutes the indoor fan moves to the state of 1 above 4 If the thermostat is turned ON it moves to the hot start control 5 When the heating...

Page 17: ...ed the 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 9 Filter sign As the operation time Total ON time of ON OFF switch accumulates to 180 hours 1 FILTER CLEANING is displayed on the remote control This is displayed when the unit is in trouble and under the central control regardless of ON OFF Notes...

Page 18: ...in detection switch 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 Heating Fan 2 Notes 1 Including the stop from the cooling dehumidifying fan and heating and the anomalous stop 2 Including the Fan operation according to the mismatch of operation m...

Page 19: ...ndoor fan speed If it enters the frost prevention control during cooling operation excluding dehumidifying the indoor fan speed is switched i When the indoor return air detection temperature detected with Thi A is C C or higher and the indoor heat exchanger temperature detected with Thi R detects the compressor frequency drop start temperature A C 1 C of indoor fan speed is increased by 20min 1 ii...

Page 20: ...a group a protective function operates that unit stops with the anomalous stop but any other normal units continue 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 control wiring to each indoor unit via terminal block for the remote control Connect the remote co...

Page 21: ...T CnT CnTA 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 prohibition pulse CnT CnT CnT CnTA CnT CnT CnTA CnT CnTA Cooling heating selection level CnT CnTA CnT CnTA CnT CnTA CnT CnTA CnT CnT Cooling heating selection pulse CnT CnTA CnT CnTA CnT CnTA CnT CnTA...

Page 22: ...ooling 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 setting It is effective only when the input signal to CnT 6 or CnTA is changed OFF ON and at that time unit operation ON OFF is inverted ON ON OFF OFF OFF ON ON ON ON Remote control OFF Remote control O...

Page 23: ... OFF 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 or Pulse input is selected by the function for External input of the wired remote control operation status will be changed as follows In case of Level input setting In case of Pulse input setting ...

Page 24: ...operation Remote control CnT Operation stop pulse CnTA Operation permission prohibition level Operation permission prohibition zone Actual operation Remote control Remote control ON Remote control OFF Remote control ON Remote control ON Remote control OFF Remote control ON ON ON ON ON ON ON ON OFF OFF OFF OFF OFF OFF OFF ON ON OFF ON ON ON ON ON OFF OFF OFF OFF OFF OFF Operation Operation Operatio...

Page 25: ...es 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 heating external input function External input selection External input selection Cooling heating selection External input method Level External terminal input CnT or CnTA Cooling heating Cooling hea...

Page 26: ...emperature 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 TEMP 1 0 C 1 5 C 2 0 C 1 0 C 1 5 C 2 0 C b Compensated temperature is transmitted to the remote control and the compressor to control them Note 1 The detection temperature compensation is effecti...

Page 27: ...ly from the return air temperature According to temperature difference between set temperature and return air temperature indoor fan tap are controlled automalically Auto 1 Changes the indoor fan tap within the range of Hi Me Lo Auto 2 Changes the indoor fan tap within the range of P Hi Hi Me Lo 35 Indoor unit overload alarm RC EX3A only If the following condition is satisfied at 30 minutes after ...

Page 28: ...main IU IU back up function Infrared sensor setting Previous Back Select the item Infrared motion sensor setting Select the item Infrared sensor setting Disable Enable Back Menu Direction Cooling 16 14 Mon F1 High power F2 Energy saving Timer Now stopping Set temp TOP screen Menu _ Energy saving setting or _ Motion sensor control Infrared sensor control Set button The Infrared sensor control scree...

Page 29: ...hours 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 control Cooling operation check When the operation mode is changed DRY or FAN 2 Not operable while the air conditioner is OFF Low When the extent of human activity is low High When the extent of human a...

Page 30: ...er b ࠉSetting an indoor unit i Turn off the power source and turn it on after 1 minute ii Point the wireless remote control that was set according to the procedure described on the left side at the indoor unit and send a signal by pressing the ACL switch on the wireless remote control Since the signal is sent in about 6 seconds after theACL switch is pressed point the wireless remote control at th...

Page 31: ...tion HIGH POWER operation will start from the set time d When the following operation are set HIGH POWER operation will be canceled When the HI ECO button is pressed again The operation mode will be changed to the ECONOMY operation When the operation mode is changed When it has been 15 minutes since HIGH POWER operation has started When the 3D AUTO botton is pressed When the SILENT botton is press...

Page 32: ...45 Left approx 50 Right approx 30 Right approx 45 Right approx 50 Center Left approx 20 When the operation is retrieved from CLEAN or ALLERGEN CLEAR operation b When the following operation are set ECONOMY operation will be canceled When the HI POWER ECONO button is pressed again When the operation mode is changed DRY to FAN c Not operable while the air conditioner is OFF d The setting temperature...

Page 33: ...ting i ii Cooling Air flow selection Operation mode AUTO Heating Indoor temp Setting temp 5 C Indoor temp Setting temp 5 C Setting temp Indoor temp 5 C Setting temp Indoor temp 5 C HIGH POWER AUTO HI HI MED MED ULO ULO LO LO HIGH POWER AUTO Flap Louver Cooling Up down swing Heating Wide Fixed Center Fixed Flap Louver Cooling Heating Left right swing Horizontal blowing Fixed Slant forwardl blowing ...

Page 34: ...peration Including auto dehumidifying operation b Sleep timer operation 9 Timer operation a Comfortable timer setting ON timer c OFF timer operation 11 Installation location setting a Setting i If the air conditioning unit is running press the ON OFF button to stop ii Press the AIR FLOW U D UP DOWN button and the AIR FLOW L R LEFT RIGHT button together for 5 seconds or more iii Setting the air con...

Page 35: ...P DOWN button and the AIR FLOW L R LEFT RIGHT button together for 5 seconds or more iii Setting the air conditioning installation location iv Press the ON OFF button Air flow range Air flow range Air flow range Left end installation Center installation Right end installation Center installation L R L R Right end installation Left end installation wireless b Sleep timer operation 9 ࠉTimer operation...

Page 36: ...ON OFF few minutes ON OFF few minutes ON ON ON OFF Thermostat ON Thermostat OFF Failure Cooling Compressor Indoor fan motor Outdoor fan motor 4 way valve 12 120rps 12 120rps 12 100rps 12 76rps SRK71ZR W Model Fan speed AUTO MED HI LO 12 50rps ULO 15 ࠉOutline of automatic operation a Determination of operation mode Heating Dehumidifying Cooling Indoor air temperature C Outdoor air temperature C A W...

Page 37: ...e indoor air temperature When the operation mode has been judged following the change of setting temperature with the remote control the hourly judgment of operation mode is cancelled 16 Protection control function a Dew prevention control Cooling Prevents dewing on the indoor unit i Operating conditions When the following conditions have been satisfied for more than 30 minutes after starting oper...

Page 38: ...rps 20 seconds 2 When this control has continued for more than 30 minutes continuously the following wind direction control is performed a When the vertical wind direction is set at other than the vertical swing the flaps change to the horizontal position b When the horizontal wind direction is set at other than the horizontal swing the louver changes to the ver tical position 09 SRK DB 087D b Fro...

Page 39: ...ure Cooling 1 i Operating conditions 2 Detail of operation Outdoor temperature 10 0 C Outdoor temperature 10 0 C Outdoor fan Outdoor temperature 16 0 C Outdoor temperature 16 0 C Outdoor fan a b c 40 40 40 40 min 1 Lower limit fan speed Note 1 Values in are for the model SRK63 c Indoor fan motor protection min 1 ii 3 Reset conditions Heating 1 Operating conditions a b 5 model 63 3䉝 24 ...

Page 40: ...emperature 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 restricted to the speeds as shown in the following table Unit rps Time after compressor ON Including acceleration time Less than 1 min Less than 5 min Less than 7 min Less than 9 min 9 min or m...

Page 41: ... conditions is satisfied a The outdoor air temperature TH2 is 25ºC or higher and fan speed is 15th speed b The compressor speed is 0 rps 4 Outdoor fan speed and fan motor speed Unit min 1 Fan speed 9th speed 10th speed 11th speed 12th speed 13th speed 14th speed 15th speed FDC71 150 200 240 260 290 390 485 ii Heating 1 Operating condition When the outdoor air temperature TH2 is 4ºC or lower contin...

Page 42: ... 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 satisfied i After start of heating operation When it elapsed 35 minutes Accumulated compressor operation time ii After end of defrost operation When it elapsed 35 minutes Accumulated compressor operatio...

Page 43: ...itions 6 Cooling high pressure control a Purpose b Detector c Detail of operation Outdoor heat exchanger temperature C Example Fuzzy H 1 2 C B B A 8 20 C 2 thermostat A B C 8rps 1 8rps 1 0rps After lapse of 20 sec or over 3 After lapse of 20 sec or over 3 After lapse of 20 sec or over 3 lower limit speed 30 rps b Detail of operation Item FDC71VNP W Outdoor air temperature Lower limit speed Model 4...

Page 44: ...F E OFF Upper limit 60 rps Lower limit 45 rps ON ON Upper limit 75 rps Lower limit 35 rps Outdoor air temperature C ON Upper limit 120 rps Lower limit 20 rps Values of A B C D E F Model FDC71VNP W iii Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature TH2 is F ºC or higher 2 The compressor speed is 0 rps a Starting condition When the indoor heat exch...

Page 45: ...f 3 min or over 3 After lapse of 3 min or over 3 4 rps 4 rps 1 0 rps Example Fuzzy 95 105 115 Notes 1 When the discharge pipe temperature is in the range of 105 115ºC the speed is reduced by 4 rps 2 When the discharge pipe temperature is raised and continues 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 ...

Page 46: ...m protection a Starting conditions i When 5 Heating 9 minutes have elapsed after the compressor ON or the completion of the defrost control ii Other than the defrost control iii When after satisfying the conditions of i and ii above the compressor speed indoor air temperature Thi A and indoor heat exchanger temperature Thi R have satisfied the conditions in the following table for 5 minutes Compre...

Page 47: ...unit heat exchanger temperature sensor 55 C or lower Outdoor air temperature sensor 55 C or lower b Discharge pipe temperature sensor If the following is detected for 5 seconds continuously within 10 minutes to 10 minutes and 20 seconds after the compressor ON the compressor stops After a delay of 3 minutes it restarts but if the same is detected repeatedly 3 times within 40 minutes the compressor...

Page 48: ...lement broken wire short circuit Poor contact of temperature sensor connector Replacement repair of temperature thermistor 82 Indoor unit control PCB Defective indoor unit 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 element broken wire short circui...

Page 49: ...Current cut Anomalous compressor over current Replacement of PCB 101 102 Installation operation status Service valve closing operation Repair Stays OFF Keeps flashing Outdoor unit PCB Over voltage Repair PCB replacement 103 Defective active filter Stays OFF Keeps flashing Fan motor Defective fan motor Replacement 104 Outdoor unit PCB Defective outdoor unit PCB Stays OFF Keeps flashing Power transi...

Page 50: ...s continuously after initial communication was established Excessive number of connected indoor units by controlling with one remote control Whenever excessively connected indoor units is detected after power ON Return air temperature sensor anomaly 50 C or lower is detected for 5 seconds continuously within 60 minutes after initial detection of this anomalous temperature Indoor heat exchanger tem...

Page 51: ...egard to parts of high voltage circuits and refrigeration cycle judge it according to ordinary inspection methods b Instruction of how to replace indoor unit control PCB ٨ Read the SAFETY PRECAUTIONS carefully first of all and then strictly follow it during the replacement in order to protect yourself ٨ The precautionary items mentioned below are distinguished into two levels WARNING and CAUTION B...

Page 52: ...ed PCB v Reconnect the all wirngs to the PCB that was removed in ii vi Rescrew the terminal Arrow A of the E1 wiring that was removed in i b Control PCB Parts mounting are different by the kind of PCB CNW3 White CNQ Red CNR White CNV2 Black CNV White CNH Black CNTA Blue CNL Black CNC White CNF Yellow CNN Yellow CNI Blue CNJ1 White CNJ2 Grey CNB Black CNM1 White CNP Green A CNT Blue CNG Blue CNW0 W...

Page 53: ...ON OFF item switch Address SW2 Master Slave1 Slave2 Slave3 SW5 1 〇 〇 SW5 2 〇 〇 〇 Content of control Plural indoor units control by 1 remote control Master Slave setting Test run SW7 1 Normal Operation check drain motor test run SW6 ON 1 2 3 4 Example setting for 71VH SW6 1 2 3 4 71VH 〇 〇 Part number SW5 Master Slave setting SW2 Blue Address setting CNI Blue Float SW LED3 CNH Black Thermistor Retur...

Page 54: ...CNW3 White Terminal block CNM1 White Fan motor1 CNW1 White Control PCB CNW0 White Terminal block CNM2 Black Fan motor2 CNWR White Reactor Models FDUM71VH PSB012D993 This PCB is a general PCB Replace the PCB according to this instruction i Replace the PCB Unscrew terminal Arrow A of the E2 wiring yellow green that is connected to PCB Replace the PCB only after all the wirings connected to the conne...

Page 55: ... Wiring connector color should match with the color of connector of the PCB Screw back the terminal of wiring that was removed in ii Power PCB Parts mounting are different by the kind of PCB Models FDE71VH Part number CNM1 White Fan motor CNW1 White Control PCB CNW3 White Terminal block CNW0 White Terminal block PSB012D992 C ...

Page 56: ...erful mode Valid Reserved keep OFF Test run drain pump motor Normal Test run Valid Invalid Valid Invalid Normal Invalid Model selection As per model See table 1 Remark Address No setting at plural indoor units control by 1 R C 0 F Switch Description Default setting Table 1 Indoor unit model selection with SW6 1 SW6 4 Note 1 SW8 FDE only Default setting SW8 1 SW8 2 SW8 4 SW8 3 71VH 1 0 0 1 SW6 4 SW...

Page 57: ...ring 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 care of avoiding electrical shock a Module of part to be replaced for outdoor unit control Outdoor unit PCB Temperature sensor of outdoor heat exchanger discharge pipe outdoor air Fuses for power sourc...

Page 58: ... 1 5 Make sure that 3 minutes are elasped after shutting down a power source 6 Check a voltage with the temrinal of C58 by multimeter Fig 2 7 Detach a cover of terminal block Fig 3 8 Detach a cover of reactor Fig 3 9 Remove a screw fixing a control PCB Fig 3 Fig 1 Outdoor unit Fig 2 Terminal of C58 on PCB Fig 3 Cover of terminal block reactor and screw of PCB ...

Page 59: ...nect CnTH Black on control PCB Fig 6 13 Disconnect a power cable of compressor U V W from control PCB Fig 6 14 Take a control PCB out Fig 7 Note When you take a control box out please pull it up straight Otherwise it can be damaged Fig 7 How to remove control PCB Fig 4 Cable of fuse terminal block and reactor Fig 5 Earth cable of control box Fig 6 CnTH and power cable of compressor U V W ...

Page 60: ...2 15 Make sure setting of jumper on new PCB is the same with old PCB s setting 16 Connect the cables and connectors with the control PCB Confirm the connectors are not half inserted Fig 8 Fig 8 Setting of jumper on PCB ...

Page 61: ... of display Reference page 0 Normal 1 Discharge pipe temperature protection control P 144䠈䠄㻢䠅 a i 2 Discharge pipe temperature anomaly P 144䠈䠄㻢䠅 a ii 3 Current safe control of inverter primary current P 146䠈䠄㻢䠅 g 4 High pressure protection control P 144䠈䠄㻢䠅 b i 䠈P 145䠈䠄㻢䠅 c i 5 High pressure anomaly P 144䠈䠄㻢䠅 b ii 6 Low pressure protection control P 145䠈䠄㻢䠅 e i 䚷 7 Low pressure anomaly P 145䠈䠄㻢䠅 e...

Page 62: ...re protection control P 144䠈䠄㻢䠅 b i 䠈P 145䠈䠄㻢䠅 c i 5 High pressure anomaly P 144䠈䠄㻢䠅 b ii 6 Low pressure protection control P 145䠈䠄㻢䠅 e i 䚷 7 Low pressure anomaly P 145䠈䠄㻢䠅 e ii 8 Anti frost prevention control P 146䠈䠄㻢䠅 k 9 Current cut P 146䠈䠄㻢䠅 g 10 Power transistor protection control P 146䠈䠄㻢䠅 h 11 Power transistor anomaly Overheat P 146䠈䠄㻢䠅 i 12 Compression ratio control P 145䠈䠄㻢䠅 f 13 Spare 14...

Page 63: ...ls Bring the tester 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 End of black or blue harness to compressor Check for a power transistor short circuit When you do not have a diagnostic checker for judging if the inverter is defective measure between...

Page 64: ...are disconnected from 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 wires U Red V White and W Black of checker to the terminal of disconnected wires U V W from compressor respectively 4 Connect the short connector to CNROM on the main PCB ii Operation...

Page 65: ...test output voltage Inspection of outdoor fan motor Refer to page 104 Power source and serial signal inspection 1 to 2 N AC220 230 240V 2 N to 3 Normal if the voltage oscillates between DC 0 and approx 20V L to N AC 220 230 240V M BK WH RD V W U PCB ASSY PCB1 M MS TRANSISTOR POWER POWER T 1A L 250V CM FMo W V U P N CNTH CNEEV CNFAN 3 S IN R IN G1 N L 250V 20A F4 2 N YG C 2 RD TB1 TB2 CN20S BK WH W...

Page 66: ...e number of connected indoor units more than 17 units by controlling with one remote control 86 E11 Address setting error of indoor units 87 E14 Communication error between master and slave indoor units 88 E16 Indoor fan motor anomaly 89 E18 Address setting error of master and slave indoor units 90 E19 Indoor unit operation check drain pump motor check setting error 91 E20 Indoor fan motor rotatio...

Page 67: ...other respective parts NO YES YES NO YES YES YES NO NO Is the compressor operating NO YES NO Note 1 Outdoor 35 C Indoor 27 C 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 necessary to replace to higher capacity one or to install additional unit Compressor refrigerant oil protec...

Page 68: ...ating NO YES NO Note 1 Outdoor 7 C Indoor 20 C 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 necessary to replace to higher capacity one or to install additional unit Compressor refrigerant oil protection control at starting is activated Compressor may be stopped by the error d...

Page 69: ...left for long time without power source the insulation resistance may drop to a few MΩ because of refrigerant migrated in the compressor When the earth breaker is activated at lower insulation resistance check the following points Check if the earth leakage breaker is conformed to higher harmonic regulation or not Since the unit is equipped with inverter it is necessary to use components conformed...

Page 70: ...smitting 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 other appropriate means Strength of ceiling wall floor etc may be insufficient Review the installing position or reinforce it Check for leaning of installed unit or anomalous mounting of fan louver or motor and specify the contacting point and correct ...

Page 71: ...rticularly during cooling or defrost operation in the heating mode It is normal The noise vibration occurs when the refrigerant starts or stops flowing It is normal When the defrost operation starts or stops during heating the refrigerant flow is reversed due to switching 4 way valve This causes a large change in pressure which produces a blowing sound It may accompany also the hissing sounds as m...

Page 72: ...ary 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 case check the conditions when where how the noise vibration occurs according to following check point Indoor outdoor unit Cooling heating fan mode Startup stop during operation Operating condition Indoor outdoor temperatures pressure Time it occurre...

Page 73: ...ocked 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 minute Repair wiring Defective indoor unit control PCB Replace Replace LM Normal Adjust LM lever and then check again 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Defective...

Page 74: ...FDE F1 F2 FDU FDUM F1 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 Misconnection or breakage of connecting wires Defective indoor unit control or power PCB Replace Replace FM LM etc Replace fuse Defective indoor unit power PCB Replace Open JX1 Defective indo...

Page 75: ...rcuited Is DC180V between 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 Replace wires Replace remote control Defective indoor unit power PCB Replace Defective indoor unit control PCB Replace 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Remote control wire breakage short...

Page 76: ...eset NO YES YES NO NO NO NO NO YES YES YES Set one remote control for Master and the other for Slave Set SW1 on remote control PCB at Master Set address again SW2 on indoor unit control PCB Separate remote control wires from high voltage wires Defective indoor unit control PCB Replace Defective remote control Change 2 Error detection method Communication between indoor unit and remote control is d...

Page 77: ...e as above 4 Presumable cause Improper setting Surrounding environment Defective remote control communication circuit Faulty indoor unit control or power PCB Faulty outdoor unit PCB Note If any error is detected 30 minutes after displaying WAIT on the remote control the display changes to INSPECT I U NO NO NO NO NO Are more than 3 units of remote control connected Does remote control display Slave...

Page 78: ...S YES YES Defective 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 Defective connection wire broken wire Noise Defective indoor unit control PCB Replace 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Blown fuse Faulty outdoor u...

Page 79: ...NO YES Replace the outdoor unit PCB NO Replace the reactor NO Isn t there a short circuit between phases of outdoor unit PCB Aren t there cracks or burning on the power transistor module or diode stack Isn t reactor the anomalous From previous page Replace fuse 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Blown fuse Faulty outdoor unit PCB Faulty reactor Note Error co...

Page 80: ... indoor and 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 circuit on remote control wire Defective remote control Correct wires Defective outdoor unit PCB Replace Defective connection wire Broken wire Noise Defective indoor unit control PCB Repl...

Page 81: ...oise Check peripheral 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 indoor unit is interrupted for more than 2 minutes Detectable only with the remote control 3 Condition of Error displayed Same as above 4 Presumable cause Defective communication circu...

Page 82: ... Note 2 Check for faulty connection or breakage of signal wires between indoor outdoor units YES NO YES NO Repair signal wires Repair signal wires Defective outdoor unit PCB Defective network communication circuit Replace Unit is normal Malfunction by temporary noise etc 2 Error detection method When normal communication between indoor and outdoor unit is interrupted for more than 2 minutes 3 Cond...

Page 83: ... unit control PCB Replace Defective indoor unit heat exchanger temperature sensor input circuit 2 Error detection method Anomalously low temperature or high temperature resistance is detected on the indoor heat exchanger thermistor Thi R1 R2 or R3 3 Condition of Error displayed When the temperature sensor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minutes delay t...

Page 84: ...control PCB Replace Defective return air temperature sensor input circuit 2 Error detection method Anomalously low temperature or high temperature resistance is detected by indoor return air temperature sensor Thi A 3 Condition of Error displayed When the temperature sensor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minute delay the compressor starts again automa...

Page 85: ...E6 YES NO YES NO Error stop Reset Indoor heat exchanger temperature C 56 63 For the characteristics of indoor heat exchanger temperature refer to E6 Wash Defective indoor heat exchanger temperature sensor connector Correct Defective indoor heat exchanger temperature sensor Check refrigerant system Adjust 2 Error detection method Indoor heat exchanger temperature sensor Thi R1 R2 R3 3 Condition of ...

Page 86: ...p OK NO YES NO YES NO Check float switch Defective indoor unit control PCB Replace Defective indoor unit control PCB Replace Check option equipment Correct setting to Humidifier drain pump motor interlock Defective indoor unit control PCB Replace Check wiring of drain pump motor Correct Check drain pump motor 2 Error detection method Float switch is activated 3 Condition of Error displayed If the ...

Page 87: ...en t more than 17 indoor 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 remote contorl 3 Condition of Error displayed Same as above 4 Presumable cause Excessive number of indoor units connected Defective remote control Note Error code Remote control LED G...

Page 88: ...turn address No to IU using or button 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 Same as above Note Is Master IU address set function of remote control used E11 occurs YES Error code Remote control LED Green Red Indoor Content IU IU IU R C In case the wiring is below and...

Page 89: ...llowing table Factory default setting Master Master Slave a Slave b SW5 1 OFF OFF ON SW5 2 OFF ON OFF DIP switch Indoor unit YES NO NO YES Correct unit address setting Correct wiring Defective indoor unit control PCB Replace Malfunction by noise Check surrounding environment 2 Error detection method When communication error between master and slave indoor units occurs 3 Condition of Error displaye...

Page 90: ...ror 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 Condition of Error displayed When actual rotation speed of indoor fan motor drops to lower than 200min 1 for 30 seconds continuously the compressor and the indoor fan motor stop After 2 seconds it starts again automa...

Page 91: ...Diagnosis Countermeasure In cases of RC EX3A Menu Service setting IU settings Select IU In cases of RC E5 Return address No to IU using or button 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 Same as above Note Is Master IU address set function of remote control used E18 oc...

Page 92: ...ol PCB ON E19 occurs 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 check when the communication between indoor and outdoor unit is established and SW7 1 is still kept ON 3 Condition of Error displayed Same as above 4 Presumable cause Mistake in SW7 1 ...

Page 93: ...fan motor 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 Condition of Error displayed When the actual fan rotation speed does not reach to the speed of required speed 50 FDU 500 min 1 after 2 minutes have been elapsed since the fan motor rotation speed c...

Page 94: ... Replace indoor unit control PCB 2 Error detection method Panel switch PS has detected Open for more than 1 second 3 Condition of Error displayed Same as above 4 Presumable cause Defective panel switch Disconnection of wiring Defective indoor unit control PCB Note Does matter improve if panel switch is turned ON forcibly after resetting error Is grill opened NO YES NO YES YES Are connectors at rig...

Page 95: ...ally 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 temperature sensor Defective remote control PCB Note After 10 seconds has passed since remote control sensor was switched from valid to invalid E28 will not be displayed even if the sensor harness is disconnected At sam...

Page 96: ...mount Recharge refrigerant by weighing proper amount on a scale 2 Error detection method Anomalous stop Reset 50 51 62 56 Outdoor heat exchanger temperature C Note 1 Values in are appli cable when outdoor temperature TH2 is lower than 32 C 3 Condition of Error displayed When anomalous outdoor heat exchanger temperature occurs 5 times within 60 minutes or 62 56 C or higher continues for 10 minutes ...

Page 97: ...rge refrigerant by weighing proper amount on a scale Control operation check Defective outdoor unit PCB Replace Check unit side Isn t filter clogged Are adequate indoor outdoor unit installation spaces Isn t there any short circuit of air Isn t there any fouling clogging on indoor heat exchanger 2 Error detection method For the error detection method refer to the protective control by controlling ...

Page 98: ...it 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 20 seconds continuously within 2 minutes to 2 minutes 20 seconds after the compressor ON the compressor stop...

Page 99: ...tive outdoor air temperature 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 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 minutes delay the compressor starts a...

Page 100: ...e sensor Replace Defective outdoor unit PCB Replace Defective temperature sensor input circuit 2 Error detection method Detection of anomalously low temperature resistance on the discharge pipe temperature sensor 3 Condition of Error displayed When the temperature sensor detects 25 C or lower for 5 seconds continuously within 10 minutes to 10 minutes 20 seconds after the compressor ON the compress...

Page 101: ...re any anoumalous sound 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 inverter output current value exceeds the setting value within 80 seconds after the compressor ON in the heating mode the compressor stops 3 Condition of Error displayed If the output...

Page 102: ...of transitional increase of high pressure and or test run several times restarting may recover it because liquid refrigerant migrated in the compresser is discharged from the compressor Replace compressor 2 Error detection method In order to prevent from overcurrent of inverter if the current exceeds the specifications it makes the compressor stopping 3 Condition of Error displayed If the output c...

Page 103: ...n motor run Are the 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 Defective outdoor unit PCB Replace Defective outdoor unit PCB Replace 2 Error detection method In order to prevent from overcurrent of inverter if the current exceeds the specifications it ...

Page 104: ...reign matter like dust 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 3 minute delay Error is displayed if the converter voltage is lower than 210V 1 time within 5 seconds after power ON 3 Condition of Error displayed Same as above 4 Presumable cause...

Page 105: ...3 Condition of Error displayed When actual rotation speed of outdoor fan motor drops to 75min 1 or lower for 30 minutes continuously the compressor and the outdoor fan motor stop After 3 minute delay it starts again automatically but if this anomaly occurs 3 times within 60 minutes after the initial detection 4 Presumable cause Defective outdoor unit PCB Foreign material at rotational area of fan ...

Page 106: ... 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 PCB Blown F2 fuse Check soldered surfaces on the outdoor unit PCB for foreign matter like dust fouling etc Isn t F2 fuse 250V 20A blown Remove foreign matter like dust fouling etc Replace fuse Defective outdoor unit...

Page 107: ...ir temperature sensor input circuits 2 Error detection method Judge insufficient refrigerant amount by detecting the temperature differnce between indoor heat exchanger Thi R and indoor return air Thi A 3 Condition of Error displayed When the insufficient refrigerant amount is detected 3 times within 60 minutes 4 Presumable cause Defective indoor heat exchanger temperature sensor Defective indoor ...

Page 108: ...pressor Defective outdor air temperature sensor Defective outdoor unit PCB Diagnosis Countermeasure 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Note Is outdoor ventilation condition good Inspect outdoor air temperature sensor Is the refrigerant amount nomal Adjust the refrigerant amount properly Secure space for inlet and outlet Replace compressor Replace sensor Defe...

Page 109: ...ection method If 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 Faulty outdoor unit PCB Anomalous power source voltage Improper refrigerant amount and refrigerant circuit Faulty compressor Motor bearing Note Insulation resistance The unit is left for ...

Page 110: ...ter shifting to the compressor rotor position detection operation the compressor stops 4 Presumable cause Defective outdoor fan motor Defective outdoor unit PCB Anomalous power source voltage Improper refrigerant amount and refrigerant circuit Defective compressor motor bearing Note Insulation resistance The unit is left for long period without power source or soon after installation migrated liqu...

Page 111: ... the outdoor unit 09 SRK DB 087D 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT 1 Cautions 2 Items to check before troubleshooting 3 Troubleshooting procedure If the air conditioner does not run at all Important YES YES YES NO NO NO NO YES Reference Reference AC proced wireless source source satisfied ...

Page 112: ... 111 19 PAC SM 312 09 SRK DB 087D 4 Troubleshooting procedure If the air conditioner runs NO NO NO NO YES YES YES YES See page 112 See pages 113 119 See pages 113 119 ...

Page 113: ...tor position after shifting to the compressor rotor position detection operation the compressor stops Defective compressor Operation status Installation status Compressor rotor lock error When the outdoor fan motor speed continues for 30 seconds or longer at 75 min 1 or lower 3 times The air conditioner stops Defective fan motor poor connector connection Outdoor fan motor error Indoorunitdisplaypa...

Page 114: ...can be checked These are the data which display the reason by a stop occurred when the air conditioning system performed protective stops etc in the past Even if stop data alone are generated the system previous occasion are erased Important In cases where transient stop data only are generated the air conditioner system more times it could lead to customer complaints b Service mode display proced...

Page 115: ...de mode mode 21ºC 22ºC 23ºC 24ºC 25ºC 1 time previous previous time 2 times previous 3 times previous 4 times previous 5 times previous Only for indoor heat exchanger temperature sensor 2 Indicates the number of occasions previous to the present the error display data are from Temperature setting 26ºC 27ºC 28ºC 29ºC 30ºC 1 time previous previous time 2 times previous 3 times previous 4 times previ...

Page 116: ... the stop stop code 2 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 3 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 4 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 5 times ...

Page 117: ... operation and the compressor stops When the anti frost control operates and the compressor stops during cooling operation When 10 seconds passes after the power is turned on without communications signals from the indoor or outdoor unit being detected correctly When the current is 1A or less at the time the compressor started When the power source voltage drops during operation When the compresso...

Page 118: ...AUTO DRY COOL FAN HEAT TIMER light 1 s digit Display pattern when in service mode Fan speed mode when there is an abnormal stop 2 time flash 3 time flash 4 time flash AUTO HI MED LO 5 time flash ULO 6 time flash 7 time flash operation mode and fan speed mode becomes as follows HI POWER ECONO Mode Operation mode Fan speed mode 0 5 sec 1 5 sec RUN light 10 s digit TIMER light 1 s digit 11 second int...

Page 119: ... 84 94 55 45 35 25 15 5 5 15 25 35 45 55 65 75 85 95 56 46 36 26 16 6 6 16 26 36 46 56 66 76 86 96 57 47 37 27 17 7 7 17 27 37 47 57 67 77 87 97 58 48 38 28 18 8 8 18 28 38 48 58 68 78 88 98 59 49 39 29 19 9 9 19 29 39 49 59 69 79 89 99 No does not sound Sensor name Room temperature sensor Indoor heat exchanger temperature sensor Outdoor air temperature sensor Outdoor heat exchanger temperature se...

Page 120: ...6 126 146 48 28 8 8 28 48 68 88 108 128 148 50 30 10 10 30 50 70 90 110 130 150 52 32 12 12 32 52 72 92 112 132 54 34 14 14 34 54 74 94 114 134 56 36 16 16 36 56 76 96 116 136 58 38 18 18 38 58 78 98 118 138 No does not sound Sensor value displayed when the error code is normal 64ºC 0 5 sec 0 1 sec 1 5 sec 11 second interval 0 5 sec OFF ON OFF ON OFF ON temperature information data Buzzer sound If...

Page 121: ... 120 19 PAC SM 312 09 SRK DB 087D Service data record form 114 Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless Wireless r ...

Page 122: ...t PCB check procedure Power source reset Is it normalized Malfunction by temporary noise Replace fan motor If the error persists after replacing the fan motor replace the indoor unit PCB Short circuit Sensor temperature characteristics Room temperature indoor heat exchanger temperature the fan motor and indoor unit PCB separately Is the output of the indoor unit PCB normal Defective indoor unit PC...

Page 123: ...09 SRK DB 087D Error of signal transmission Wiring error including power cable defective indoor outdoor unit PCB source Defective outdoor unit PCB Defective outdoor unit PCB Check crossover wires Defective indoor unit PCB ...

Page 124: ...ween DC 0 and 20V Inspect power source for outdoor unit Replace fuse Replace indoor unit PCB Is the fuse burnt out 3 15 A NO YES YES NO YES NO b Indoor fan motor check procedure i Indoor unit PCB output check DC15V Indoor unit PCB DC 308 336V DC several V 4 6 V CNU GND Blue Yellow White Black Red Sensor Operation mode Phenomenon Shortcircuit Disconnected wire Heat exchanger sensor Cooling Heating ...

Page 125: ... 308 336V DC several V 4 6 V CNU GND Blue Yellow White Black Red Measuring point Resistance when normal Measuring point Voltage range when normal k M 1 2 3 This is a diagnostic procedure for determining if the indoor fan motor or the indoor unit PCB is broken down in the following figure are output for approximately 30 seconds it means that the indoor unit PCB is normal and the fan motor is broken...

Page 126: ...ES YES YES NO NO NO Replace the faulty part and the fuse Test run then the unit for checking Is there any damage on the internal circuit of fan motor Check the resistance value to judge See pages 123 to 125 Is the fuse blown on the indoor unit PCB Is there any faulty part fan motor etc See pages 123 to 125 Replace the fuse on the indoor unit PCB When the operation is checked without connecting the...

Page 127: ...are on site SW5 3 ELECTRICAL WIRING 1 Indoor un a Ceiling cassette 4 way type FDT Model FDT71VH 19 PAC DB 311D 17 PJF000Z554 Notes 1 indicates wiring on site 2 See the wiring diagram of outside unit about the line between 3 Use twin core cord 0 3mm 2 at remote control line See spec sheet of remote control in case that the total length is more than 100m indoor unit and outdoor unit 4 Do not put rem...

Page 128: ... wiring on site 2 See the wiring diagram of outdoor unit about the line between indoor unit and outdoor unit 3 Use twin core cord 0 3mm 2 at remote control line See spec sheet of remote control in case that the total length is more than 100m 4 Do not put remote control line alongside power source line 5 Section 1 1 shows electric circuit of motion sensor Option FMi2 FS Float switch Indication lamp...

Page 129: ...ower PCB Power circuit 1 Earth The line between 2 1 3 Power source line Signal line indoor unit and outdoor unit M 1 4 5 6 7 F4 2A CNM2 BK RD BL or BK BR or WH WH or BL OR or YE BL 3 1 WH CNW3 WH 1 2 WH RD YE GN 3 5 CNW0 WH 1 3 TB1 F1 5A YE GN 1 2 CNTA BL Remote operation input volt free contact 12 Prepare on site XR5 Remote operation input volt free contact FMi2 FS Float switch Indication lamp Re...

Page 130: ...escription Anti freeze control SW8 1 Meaning of marks d Ceiling suspended type FDE Model FDE71VH PFA004Z087 20 19 PAC DB 311D Power PCB 1 2 3 4 5 CNW1 WH F1 3 15A 3 5 CNW0 WH 1 Power circuit 6 7 8 9 10 11 12 WH RD 1 2 TB1 Earth M 1 4 5 6 7 F3 2 0A R D B K W H Y E B L FMi CNM1 WH YE GN 3 BL WH 1 3 CNW3 WH F2 3 15A Mark BK BL BR OR Color Black Blue Brown Orange RD WH Red White Yellow Yellow Green Pi...

Page 131: ...TED SM 1 LM 1 CNX M M M 5 5 LM 2 RD WH RD WH BK BL Y Y G BK CNG CNE DISPLAY WIRELESS RECEIVER CNF BACK UP SW 2 8 Th2 1 Th2 2 Th1 Th3 CNY Y G CNM 5 Color Marks Blue Black BK Red BL RD White WH Yellow Green Y G Yellow Y Color Mark Heat exchanger temperature sensor Humidity sensor Fan motor Room temperature sensor Flap motor Th1 Th2 1 2 Th3 Diode stack DS Fuse F Connector CNE FMi Terminal block TB Lo...

Page 132: ... 19 PAC SM 312 131 22 2 Outdoor units Model FDC71VNP W 19 PAC DB 311D C PCA001Z873 A Power source 1 Phase 220 230 240V 50HZ 220V 60HZ ...

Page 133: ...ensor Muffler Compressor Discharge pipe temperature sensor 4 way valve TH3 TH2 Heat exchanger temperaturesensor TH1 EEV Capillary tube Heat exchanger Accumulator Muffler Reducer Accessory Reducer Accessory 4 PIPING SYSTEM Preset point of the protective devices Parts name Mark Equipped unit FDT FDU FDUM FDE series Temperature sensor for protection overloading in heating Thi R Indoor unit OFF 63 ON ...

Page 134: ...re TH3 OFF 115 ON 95 Indoor unit Outdoor unit Cooling cycle Heating cycle Heat exchanger temperature sensor Heat exchanger temperature sensor Room temperature sensor Th3 Th1 Humidity sensor Th22 Th21 Heat exchanger Gas pipe φ12 7 Liquid pipe φ6 35 Service valve Flare connecting Check joint Service valve Flare connecting Electronic expansion valve Strainer Receiver Muffler Capillary tube Outdoor ai...

Page 135: ...t 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 our policy of continuous improvement we reserve the right to make changes in all specifications without notice C MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS LTD 2 3 Marunouchi 3 chome Chiyoda ku Toky...

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