Toshiba MMD-AP0726HP-UL Service Manual Download Page 14

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6. REFRIGERANT CYCLE DIAGRAM

Indoor unit

Heat exchanger

at indoor side

Fan

Fan motor

Sensor

(TA)

Sensor

(TC1)

Gas side

Liquid side

Strainer

Capillary tube

Pulse Motor

Valve (PMV)

Strainer

Sensor

(TCJ)

Sensor

(TC2)

Functional part name

Pulse Motor Valve

PMV

1.TA

(Connector CN082 (6P): Blue)
1) Controls super heat in cooling operation
2) Controls

subcool

in heating operation

3) Recovers refrigerant oil in cooling operation
4) Recovers refrigerant oil in heating operation

Temp. Sensor

(Connector CN104 (2P): Yellow)
1) Detects indoor suction temperature

Functional outline

2.TC1

(Connector CN100 (3P): Brown)
1) Controls PMV super heat in cooling operation

3.TC2

(Connector CN101 (2P): Black)
1) Controls PMV

subcool

in heating operation

(Connector CN102 (2P): Red)
1) Controls PMV super heat in cooling operation

Explanation of functional parts in indoor unit

.TC

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Summary of Contents for MMD-AP0726HP-UL

Page 1: ...R410A SERVICE MANUAL AIR CONDITIONER MULTI TYPE INDOOR UNIT Concealed Duct High Static Pressure Type MMD AP0726HP UL MMD AP0966HP UL FILE NO SVM 16051 1 Revised on February 2017 ...

Page 2: ... connector specifications of indoor P C board 25 8 3 Test operation of indoor unit 28 8 4 Method to set indoor unit function DN code 29 8 5 Applied control of indoor unit 32 9 TROUBLESHOOTING 48 9 1 Overview 48 9 2 Troubleshooting method 49 9 3 Troubleshooting based on information displayed on remote control 55 9 4 Check codes displayed on remote control and SMMS outdoor unit 7 segment display on ...

Page 3: ...parties and the users due to troubles of the product after work when an incorrect work has been executed Mark Explanation Indicates prohibited items Forbidden items to do The sentences near an illustrated mark describe the concrete prohibited contents Indicates mandatory items Compulsory items to do The sentences near an illustrated mark describe the concrete mandatory contents Indicates cautions ...

Page 4: ...se abnormally high pressuremay be generated in the refrigeration cycle which may result in a failure or explosion of the product or an injury to your body For an air conditioner which uses R410A never use other refrigerant than R410A For an air conditioner which uses other refrigerant R22 etc never use R410A If different types of refrigerant are mixed abnormal high pressure generates in the refrig...

Page 5: ...is innocuous When installing equipment which includes a large amount of charged refrigerant such as a multi air conditioner in a sub room it is necessary that the density does not the limit even if the refrigerant leaks If the refrigerant leaks and exceeds the limit density an accident of shortage of oxygen is caused For the installation moving reinstallation work follow to the Installation Manual...

Page 6: ...ix in because pipes are affected by impurities such as water oxide scales oil etc Use the clean pipes Be sure to brazing with flowing nitrogen gas Never use gas other than nitrogen gas 4 For the ground protection use a vacuum pump for air purge 5 R410A refrigerant is azeotropic mixture type refrigerant Therefore use liquid type to charge the refrigerant If using gas for charging composition of the...

Page 7: ...which serve also for R22 are necessary as the general tools 1 Vacuum pump Use vacuum pump by attaching vacuum pump adapter 7 Screwdriver 2 Torque wrench 8 Spanner or Monkey wrench 3 Pipe cutter 9 Hole core drill 4 Reamer 10 Hexagon wrench Opposite side 4mm 5 Pipe bender 11 Tape measure 6 Level vial 12 Metal saw Also prepare the following equipments for other installation method and run check 1 Cla...

Page 8: ... External static pressure range In WG 0 201 0 334 0 470 0 603 0 735 0 872 1 005 7steps Control Remote control Connecting Gas side inch 7 8 pipe Liquid side inch 1 2 Drain port inch VP25 Polyvinyl chloride tube External Dia 1 1 4 Internal Dia 1 dB A 44 40 36 46 42 38 Sound power level High Med Low dB A 79 75 71 81 77 73 Note 1 The cooling capacities and electrical characteristics are measured under...

Page 9: ...20in WG AP096 type 1 4 E E xterna xternal Static Pressure in WG WG Standard Air Flow 2827 cfm 1 500 Standard Air Flow 2827 cfm High 1 0in WG Mid 1 0in WG 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 1 1 2 1 2 1 1 3 3 High 1 0in W High 1 0in WG G High 0 87in W High 0 87in WG G High 0 High 0 73in W 73in WG G High 0 60inWG High 0 47in WG High 0 33in WG High 0 20in WG Low M Mi id 1 0in W d 1 0in WG G M Mi id 0 87in ...

Page 10: ...34 Unit external dimension 55 1 1400 51 0 1296 Outside 17 6 448 12 8 324 Outside 3 3 84 4 0 101 3 7 95 Hole for hanging bolt 4 Φ0 5 12 1 2 30 Refrigerant pipe connecting port Liquid side O 1 2 12 7 Flare nut connection Refrigerant pipe connecting port Gas side O 7 8 22 2 Drain pipe connecting port Gravitiational drainage 1 1 If there are enough space under the unit more than 39 4 1000mm the servic...

Page 11: ...let 7 9 200 7 9 200 7 9 200 7 9 200 7 9 200 7 9 200 26 Φ0 2 4 7 hole 2 3 58 2 3 58 0 8 20 1 7 44 4 2 106 1 7 44 4 2 106 1 7 44 1 3 32 7 9 200 7 9 200 7 9 200 7 9 200 7 9 200 7 9 200 14 2 361 51 1 1297 1 6 41 1 6 41 2 3 58 13 5 343 15 1 384 51 8 1316 Air inlet 3 5 90 3 5 90 3 5 90 0 2 6 1 1 27 1 1 27 Electrical control box Thickness of plate 0 03 0 8 32 Φ0 1 3 1 hole 11 Unit in mm ...

Page 12: ...se Filter P C Board MCC 1551 TB01 CN02 CN01 CN04 CN03 WHI RED RED WHI t t t MS 3 FM CN300 WHI 1 3 1 F5 5 0 A 0 1 2 3 5 4 CN505 4 RED BLU BLK 5 4 3 2 1 CN505 RED Fan Control P C Board CN511 CN510 1 2 CN502 WHI U V W RED WHI BLK CN705 CN704 CN703 MCC 1610 L FM RB RY01 P C Board Connector Terminal Terminal Block Protective ground Field Wiring WHI White YEL Yellow RED Red BRW Brown BLK Black BLU Blue ...

Page 13: ...or valve TA sensor TC1 sensor TC2 sensor TCJ sensor EFM MD12TF 3 EFM A0YGTF 2 KF 340W1000 1 0 24 6mm size lead wire length 39 4 1000mm Vinyl tube Red 0 24 6mm size lead wire length 39 4 1000mm Vinyl tube Black 0 16 4mm size lead wire length 39 4 1000mm Vinyl tube Blue Lead wire length 8 6 218mm 13 ...

Page 14: ...ration 2 Controls subcool in heating operation 3 Recovers refrigerant oil in cooling operation 4 Recovers refrigerant oil in heating operation Temp Sensor Connector CN104 2P Yellow 1 Detects indoor suction temperature Functional outline 2 TC1 Connector CN100 3P Brown 1 Controls PMV super heat in cooling operation 3 TC2 Connector CN101 2P Black 1 Controls PMV subcool in heating operation Connector ...

Page 15: ...ion command issued via the remote control Remote control command STOP FAN COOL HEAT Control outline Air conditioner shutdown Fan operation Cooling operation Heating operation TS Temperature setting TA Room temperature COOL HEAT Wired type 64 F 18 C to 84 F 29 C Wireless type SET DATA 0 2 4 6 Temperature setting adjustment 0 F 0 C Model type SET DATA Floor standing standard concealed cabinet 0 Othe...

Page 16: ...s chosen As long as the temperature difference remains on a boundary line the fan speed stays the same Heating TA F C 0 9 1 8 0 5 1 0 0 Tsh 0 9 1 8 0 5 1 0 1 8 3 6 1 0 2 0 2 7 5 4 1 5 3 0 3 6 7 2 2 0 4 0 L L L H H H HH HH H HH E D C B A Figures inside applies to remote control thermostat operation Figures outside applies to body thermostat operation Speed modes shown in apply to heating operation ...

Page 17: ...to thermostat OFF the indoor fan is operated in breeze mode until it moves into zone I The control is terminated under the following conditions Termination conditions 1 TC1 54 F 12 C TC2 54 F 12 C and TCJ 54 F 12 C TC1 Indoor heat exchanger sensor temperature B A A zone OFF B zone 79 F 26 C or above and below 82 F 28 C breeze C zone 82 F 28 C or above and below 86 F 30 C Low D zone 86 F 30 C or ab...

Page 18: ... to compact 4 way cassette type and 1 way cassette type Recovery operation normally takes place roughly every 2 hours The opening position of the indoor PMV depending on the type and capacity of the indoor unit Recovery operation normally takes place roughly every hour The opening position of the indoor PMV depending on the type and capacity of the indoor unit 9 While the outdoor unit is engaged i...

Page 19: ... Heating standby Displayed on remote control 1 Normal thermostat OFF During heating the indoor unit goes thermostat OFF as the heating temperature setting is reached 2 During heating the fan rotates at a breeze speed UL or lower or remains stationary to prevent cold air from being discharged including defrosting operation 3 Forced thermostat OFF HEAT operation is unavailable because at least one i...

Page 20: ... the wireless remote control Frequency fixed operation Test run 18 In case of wired remote control 1 When pushing CHK button for 4 seconds or more TEST is displayed on the display screen and the mode enters in Test run mode 2 Push ON OFF button 3 Using MODE button set the mode to COOL or HEAT Do not use other mode than COOL HEAT mode During test run operation the temperature cannot be adjusted Che...

Page 21: ...L1 U1 U2 L2 Power supply Outdoor unit Follower 3 Follower Remote conrol communication circuit MCU EEPROM TA sensor TC1 sensor TC2 sensor TCJ sensor HA Driver Start Alarm Ready PMV BUS communication circuit Power circuit Outdoor unit Power supply 1Φ 208 230V 60Hz Indoor Outdoor communication U1 U2 L2 L1 Outside output DC12V DC5V DC20V Indoor control P C Board MCC 1643 Indoor fan motor Reactor Power...

Page 22: ...tion U1 U2 Outside output DC12V DC5V DC20V Indoor control P C Board MCC 1643 Indoor fan motor Reactor Power circuit MCU Fan motor control DC5V DC15V Fan IPDU MCC 1610 Noise filter P C Board MCC 1551 Drain pump Option Power circuit Emergent operation SW CPU Buzzer Receiving circuit Function setup SW Display LED DC5V Receiving P C Board Wireless remote control kit Indoor unit 1 Header A B Max 8 unit...

Page 23: ...emote conrol communication circuit MCU EEPROM TA sensor TC1 sensor TC2 sensor TCJ sensor HA Driver Start Alarm Ready PMV BUS communication circuit Power circuit Outdoor unit Indoor Outdoor communication U1 U2 Outside output DC12V DC5V DC20V Indoor control P C Board MCC 1643 Indoor fan motor Reactor Power circuit MCU Fan motor control DC5V DC15V Fan IPDU MCC 1610 Noise filter P C Board MCC 1551 Dra...

Page 24: ...AN IPDU Application control P C Board CN521 Red DC12V Output for FS unit CN81 Black DC12V TC2 sensor CN101 Black DC5V Signal for drain pump CN504 White DC12V TA sensor CN104 Yellow DC5V External static pressure select SW SW501 CHK CN71 White DC5V DISP CN72 White DC5V DC5V HA T10 CN61 Yellow DC12V Remote control CN41 Blue DC20V Indoor Outdoor communication CN40 Blue Float SW CN34 Red DC12V TC1 sens...

Page 25: ...peration stop is performed by input Operation ON Answer back of HA 5 6 DC12V Output Open collector ON OFF input 0V Remote control prohibited input Operation output Open collector DC12V Warning output Open collector CHK Operation check CN71 1 Warning output ON This check is used to check indoor operation Performs operation of indoor fan H Louver horizontal and Drain pump ON without communication wi...

Page 26: ...supply input CN500 CN510 CN511 CN502 CN511 CN510 Fan motor output U phase CN705 Fan motor output V phase CN704 Fan motor output W phase UART communication between CDB UART communication between Application control P C Board Reactor connecting terminal Reactor connecting terminal Power relay output CN602 26 ...

Page 27: ...8 2 3 Noise filter MCC 1551 CN01 Red Power supply input Live CN03 Red Power supply output Live CN04 White Power supply output Neutral L01 Line Filter CN04 White Power supply input Neutral 27 ...

Page 28: ...to the normal time if short circuiting DISP pin CN72 on the indoor P C board MCC 1643 in addition to short circuit of CHK pin CN71 on the indoor P C board the minimum opening degree 30 pls can be set to the indoor PMV only When open DISP pin the maximum opening degree 1500 pls can be obtained again How to clear Open CHK pin While the system is operating it stops once but automatically returns to o...

Page 29: ...t Nos under group control is displayed in turn Then the fan of the selected indoor unit move 3 Use the TEMP button to select the CODE No DN code of the desired function 4 Use the button to select the desired SET DATA associated with the selected function 5 Push the SET button The display changes from flashing to steady To change the selected indoor unit go back to step 2 To change the selected fun...

Page 30: ... fan control 0000 Unavailable 13 Line address Indoor unit address 0001 No 1 unit 0030 No 30 unit 0064 No 64 unit to 0099 Unfixed 10 Type RQFHDOHG XFW LJK 6WDWLF 3UHVVXUH 7 SH refer to QH W page Type CODE No 10 Depending on model type 0F Cooling only 0000 Heat pump 0001 Cooling only No display of AUTO HEAT 0000 Heat pump 0d Existence of AUTO mode 0000 Provided 0001 Not provided Automatic selection ...

Page 31: ...ty Invalid 007 type 009 type 012 type 015 type 018 type 024 type 027 type 030 type 036 type 048 type 056 type 072 type 096 type Value 0006 Type Model Concealed Duct High Static Pressure Type MMD AP HP UL Indoor Unit Capacity DN code 11 1 Default value stored in EEPROM mounted on service P C board 31 ...

Page 32: ...ile unit in normal operation present while alarm e g serial communication trouble or operation of protective device for indoor outdoor unit being activated Wiring diagram of control system using Remote location ON OFF control box TCB IFCB 4UL Input Output IFCB 4UL No voltage ON OFF serial signal No voltage contact in operation and alarm indication Contact capacity Max AC 240 V 0 5 A 1 2 3 4 5 6 CN...

Page 33: ... control In this time the fan of the selected indoor unit turns on 2 Every pushing UNIT LOUVER button left side of the button the indoor unit numbers in group control are displayed successively In this time the fan of the selected indoor unit only turns on 3 Using the setup temp or button specify the CODE No 31 31 31 31 31 4 Using the timer time or button select the SET DATA At shipment 0000 0000 ...

Page 34: ...e card switch box When the card switch box does not perform the above contact operation convert it using a relay with non voltage normally closed contact 2 Operation Handle the wired remote control switch in the following procedure Use the wired remote control switch during stop of the system 1 Push concurrently SET CL buttons for 4 seconds or more 2 Using the setup temp or button specify the CODE...

Page 35: ... address setting Pair the indoor unit to set and the remote control one to one Turn on the power 1 Push and hold the SET CL and buttons at the same time for more than 4 seconds LCD starts flashing Outdoor unit Remote control Indoor unit 1 Refrigerant line 1 Refrigerant line 2 Indoor unit 2 Indoor unit 3 Outdoor unit Indoor unit 1 Indoor unit 2 1 Line system address 1 1 2 2 1 Indoor unit address 2 ...

Page 36: ... can control the unit after SETTING has disappeared NOTE 1 Do not use address numbers 29 or 30 when setting system addresses using the remote control These 2 address numbers cannot be used on outdoor units and the CODE No E04 Indoor outdoor communication trouble will appear if they are mistakenly used 2 If you set addresses to indoor units in 2 or more refrigerate lines manually using the remote c...

Page 37: ...IMER SET TEST FILTER RESET TEMP CL FAN SAVE SWING FIX VENT MODE ON OFF UNIT LOUVER Execute it while the units are running 1 Push the ON OFF button if the units stop 2 Push the UNIT LOUVER button left side of the button A unit numbers 1 1 1 1 1 1 1 1 1 1 is indicated on the LCD it will disappear after a few seconds The indicated number shows the system address and indoor unit address of the unit Wh...

Page 38: ...ctivated 1 Push and hold the VENT and buttons at the same time for more than 4 seconds ALL ALL ALL ALL ALL appears on UNIT No on the LCD display The fans of all the indoor units in the group are activated 2 Push the UNIT LOUVER button left side of the button Each time you push the button the indoor unit numbers are indicated one after another The first indicated unit number is the address of the h...

Page 39: ...an 4 seconds At first the line 1 and CODE No AC Address Change are indicated on the LCD display Select an outdoor unit 2 Push the UNIT LOUVER button left side of the button and SWING FIX buttons repeatedly to select a system address 3 Push the SET button to confirm the system address selection The address of an indoor unit connected to the selected refrigerant line is indicated on the LCD display ...

Page 40: ...UNIT No is that of the head unit 2 Push the UNIT LOUVER button left side of the button repeatedly to select an indoor unit number to change if 2 or more units are controlled in a group The fan of the selected indoor unit are activated The fan of the selected indoor unit is turned on 3 Push the TEMP buttons repeatedly to select13 13 13 13 13 for CODE No 4 Push the TIME buttons repeatedly to change ...

Page 41: ... following step 2 Execute it while the units are stopped 1 Push and hold the TIME buttons at the same time for more than 4 seconds At first the line 1 and CODE No AC AC AC AC AC Address Change are indicated on the LCD display 2 Push UNIT LOUVER button left side of the button and SWING FIX buttons repeatedly to select a system address 3 Push the SET button The address of one of the indoor units con...

Page 42: ... to confirm the new address on SET DATA 6 Push the UNIT LOUVER button left side of the button repeatedly to select another address to change Each time you push the button the indoor unit numbers in a refrigerant line are indicated one after another Only the fan of the selected indoor unit are activated Repeat steps 4 to 6 to change the indoor unit addresses so as to make each of them unique 7 Push...

Page 43: ...to FF 3 The display in A of the following figure counts down as follows at 5 second intervals 0005 0005 0005 0005 0005 0004 0004 0004 0004 0004 0003 0003 0003 0003 0003 0002 0002 0002 0002 0002 0001 0001 0001 0001 0001 0000 0000 0000 0000 0000 The check code is cleared when 0000 0000 0000 0000 0000 appears However the display counts down from 0005 0005 0005 0005 0005 again 4 Push the to return the...

Page 44: ...ol indoor unit and outdoor unit 1 Push and hold the and CL for 4 seconds or longer to enter the service monitoring mode The service monitor lights up The temperature of CODE No 00 00 00 00 00 appears at first 2 Push the TEMP button to change to CODE No of the item to monitor Refer to the following table for CODE No 3 Push the left part of the UNIT LOUVER button left side of the button to change to...

Page 45: ... side TL1 Temperature at liquid side TL2 Temperature at liquid side TL3 10 10 1 1 1 1 1 1 1 1 1 1 1 1 psi psi F F F F F F F F F F F F 4350 435 psi CODE No Data name Display format Unit Remote control display example 90 Heating cooling recovery controlled 0 Normal 0010 Heating recovery controlled 0 Normal 1 Release controlled 92 Discharge temperature release 0001 Discharge temperature release contr...

Page 46: ...t side Red CN505 On this control P C Board Red CN1 6 Switch for function select SW4 Factory default OFF Bit 1 Switches inversion of output logic of signal output 3 OUT3 Bit 2 Not used do not set 7 EXCT connector CN4 Can thermostat OFF by shorting this connector 8 Signal output terminal block TB1 Connect when extracting output signal 0 8 4 C 0 8 4 C 0 8 4 C CN1 CN2 SW4 CN3 CN4 K1 K2 K3 OUT3 OUT2 OU...

Page 47: ...put current is required for each contact Be careful of the capacity of the power source Do not apply 208 230 VAC Connect COM terminal to side of the power supply 12 to 24 VDC External analog input terminal TB3 It is possible to change the indoor unit s operation mode AN1 set temperature AN2 and blower setting AN3 by connecting a variable resistor to the analog input terminal When both the wired re...

Page 48: ...e speed for no reason 3 Could it just be cooling operation under low outside temperature conditions Could it just be defrosting operation An indoor fan would not stop 4 Could it just be the elimination of residual heat being performed as part of the air conditioner shutdown process after heating operation The air conditioner would not respond to a start stop command from a remote control 5 Could i...

Page 49: ...l control address There is duplication in central control address setting L30 L30 Detected indoor unit No Indoor external trouble input interlock Unit shutdown has been caused by external trouble input CN80 P01 ALT Indoor AC fan trouble Indoor AC fan trouble is detected activation of fan motor thermal relay P10 P10 Detected indoor unit No ALT Indoor overflow trouble Float switch has been activated...

Page 50: ... control device TCC LINK central control No indication when main remote control also in use Faulty central control communication transmission Faulty central control communication reception Multiple network adapters Central control device is unable to transmit signal due to duplication of central control device Central control device is unable to receive signal Multiple network adapters are connect...

Page 51: ...dresses set manually E26 Address of outdoor unit from which signal is not received normally E26 Signal lack of outdoor unit Follower outdoor unit initially communicating normally fails to do so reduction in number of follower outdoor units connected Outdoor follower unit trouble 8 2 E o N t i n u r o o d t u o d e t c e t e D 8 2 E Outdoor header unit detects fault relating to follower outdoor uni...

Page 52: ...iring installation trouble or detachment of outdoor discharge temperature sensor TD2 has been detected H16 01 TK1 oil circuit trouble 02 TK2 oil circuit trouble 04 TK4 oil circuit trouble 05 TK5 oil circuit trouble H16 Oil level detection circuit trouble No temperature change is detected by temperature sensor for oil level detection TK1 TK2 TK4 TK5 despite compressor having been started M I S 4 0 ...

Page 53: ...been shutdown in one refrigerant line due to detection of overflow detected by indoor unit T L A 3 1 P 3 1 P Outdoor liquid backflow detection trouble State of refrigerant cycle circuit indicates liquid backflow operation P15 01 TS condition 02 TD condition n o i t c e t e d k a e l s a G T L A 5 1 P Outdoor suction temperature sensor TS1 detects sustained and repeated high temperatures that excee...

Page 54: ...nt detection circuit trouble Abnormal current is detected while inverter compressor is turned off P04 01 Compressor 1 02 Compressor 2 T L A 4 0 P Activation of high pressure SW High pressure SW is activated P07 01 Compressor 1 02 Compressor 2 T L A 7 0 P Heat sink overheating trouble Temperature sensor built into IPM TH detects overheating or has been short circuited P22 0 Element short circuit 1 ...

Page 55: ... described below 2 Trouble history The trouble history access procedure is described below up to four check codes stored in memory Check code history can be accessed regardless of whether the air conditioner is in operation or shut down Procedure To be performed when system at rest 1 Invoke the SERVICE CHECK mode by pressing the SET buttons simultaneously and holding for at least 4 seconds The let...

Page 56: ...DU communication trouble P01 Indoor AC fan trouble P10 Indoor overflow trouble P12 Indoor DC fan trouble P13 Outdoor liquid backflow detection trouble P03 Outdoor discharge TD1 temperature trouble P04 Activation of outdoor high pressure SW P05 Open phase power failure Inverter DC voltage Vdc trouble MG CTT trouble P07 Outdoor heat sink overheating trouble Poor cooling of electrical component IGBT ...

Page 57: ...TD1 H06 Abnormal drop in low pressure sensor Ps reading Protective shutdown of outdoor unit H07 Abnormal drop in oil level H08 Trouble in temperature sensor for oil level detection circuit TK1 TK2 TK3 TK4 or TK5 H15 Wiring installation trouble or detachment of outdoor discharge temperature sensor TD2 H16 Oil level detection circuit trouble Trouble in outdoor unit TK1 TK2 TK3 TK4 or TK5 circuit H25...

Page 58: ...tomatic cooling heating setting for model incapable of it and heating setting for cooling only model Light block Check code Cause of trouble Operation Synchronized blinking Timer Ready Operation Timer Synchronized blinking Ready Alternate blinking Operation Timer Ready Other indications not involving check code 58 ...

Page 59: ...d at indoor end Stop of corresponding unit There is no communication from remote control including wireless or network adaptor Check remote control and network adaptor wiring E04 Indoor unit Indoor outdoor communication circuit trouble detected at indoor end Stop of corresponding unit Indoor unit is not receiving signal from outdoor unit Check order in which power was turned on for indoor and outd...

Page 60: ...15 E15 I F Indoor unit not found during automatic address setting All stop Indoor unit cannot be detected after indoor automatic address setting is started Check connection of indoor outdoor communication line Check for trouble in indoor power supply system Check for noise from other devices Check for power failure Check for defect in indoor P C Board E16 E16 00 Overloading 01 No of units connecte...

Page 61: ...to other outdoor units for at least 30 seconds continuously Check power supply to outdoor units Is power turned on Check connection of tie cables between outdoor units for bad contact or broken wire Check communication connectors on outdoor P C boards Check for defect in outdoor P C board I F Check termination resistance setting for communication between outdoor units E25 E25 I F Duplicated follow...

Page 62: ...s of TC1 sensor Check for defect in indoor P C board F04 F04 I F TD1 sensor trouble All stop Sensor resistance is infinity or zero open short circuit Check connection of TD1 sensor connector Check resistance characteristics of TD1 sensor Check for defect in outdoor P C board I F F05 F05 I F TD2 sensor trouble All stop Sensor resistance is infinity or zero open short circuit Check connection of TD2...

Page 63: ...y provides temperature reading higher than indicated by TL1 by at least specified margin for 3 minutes or more Check installation of TE1 and TL1 sensors Check resistance characteristics of TE1 and TL1 sensors Check for outdoor P C board I F trouble F16 F16 I F Outdoor pressure sensor wiring trouble Pd Ps All stop Readings of high pressure Pd sensor and low pressure Ps sensor are switched Output vo...

Page 64: ...ssor system wiring particularly for open phase Check connection of connectors terminals on A3 IPDU P C board Check conductivity of case heater Check for refrigerant problem inside compressor Check for defect in outdoor P C board A3 IPDU Check outdoor MG CTT H03 H03 01 Compressor 1 side 02 Compressor 2 side IPDU Current detection circuit trouble All stop Current flow of at least specified magnitude...

Page 65: ...l detection All stop Sensor resistance is infinity or zero open short circuit Check connection of TK1 sensor connector Check resistance characteristics of TK1 sensor Check for defect in outdoor P C board I F All stop Sensor resistance is infinity or zero open short circuit Check connection of TK2 sensor connector Check resistance characteristics of TK2 sensor Check for defect in outdoor P C board ...

Page 66: ...nsor Check resistance characteristics of TK2 sensor Check for connection trouble involving TK1 TK2 TK4 and TK5 sensors Check for clogging in oil equalizing circuit capillary and faulty operation in check valve Check for refrigerant entrapment inside compressor I F No temperature change is detected by TK4 despite compressor having been started Check for disconnection of TK4 sensor Check resistance ...

Page 67: ...nit Indoor group addresses not set Stop of corresponding unit Address setting has not been performed for indoor units Check indoor addresses Note This code is displayed when power is turned on for the first time after installation L09 Indoor unit Indoor capacity not set Stop of corresponding unit Capacity setting has not been performed for indoor unit Set indoor capacity DN 11 L10 L10 I F Outdoor ...

Page 68: ...ice 2 Check for defect in indoor P C board When external device is not connected to CN80 connector 1 Check for defect in indoor P C board L31 I F Extended IC trouble Continued operation There is part failure in P C board I F Check outdoor P C board I F P01 Indoor unit Indoor fan trouble Stop of corresponding unit Check the lock of fan motor AC fan Check wiring P03 P03 I F Discharge temperature TD1...

Page 69: ...e All stop Open phase is detected when power is turned on Inverter DC voltage is too high overvoltage or too low undervoltage Check for defect in outdoor P C board I F 01 Compressor 1 side 02 Compressor 2 side Inverter DC voltage Vdc trouble compressor MG CTT trouble P07 P07 01 Compressor 1 side 02 Compressor 2 side IPDU I F Heat sink overheating trouble All stop Temperature sensor built into IPM ...

Page 70: ...es is repeated four times or more TS trouble judgment criterion In cooling operation 140 F 60 C In heating operation 104 F 40 C Check for insufficiency in refrigerant quantity Check outdoor service valves gas side liquid side to confirm full opening Check PMVs PMV1 3 for clogging Check resistance characteristics of TS1 sensor Check for defect in 4 way valve Check SV4 circuit for leakage 02 TD cond...

Page 71: ...n Pd sensor detects pressure equal to or greater than 558psi 3 85MPa During heating operation Pd sensor detects pressure equal to or greater than 522psi 3 6MPa Check for defect in Pd pressure sensor Check service valves gas side liquid side to confirm full opening Check for defect in outdoor fan Check for defect in outdoor fan motor Check outdoor PMV PMV1 3 4 for clogging Check indoor outdoor heat...

Page 72: ...of fan motor connector Check for defect in fan IPDU P C board Check fan motor Check for defect in fan IPDU Check power voltage of the main power supply Check for defect in fan IPDU Check connection of fan IPDU P C board Sub code 0 Fan IPDU over current protection circuit Flow of current equal to or greater than the specified value is detected during startup of the fan Sub code 1 Fan IPDU position ...

Page 73: ...or defect in central control communication line Check terminator resistor setting Check power supply for devices at other end of central control communication line Check defect in P C boards of devices at other end of central control communication line 2 1 C General purpose device I F Batch alarm for general purpose device control interface Continued operation Trouble signal is input to control in...

Page 74: ...lead from CN703 704 705 of MCC 1610 If the fan motor is locked or not Unable to rotate it by hand If the winding resistance of the motor is correct or not 2 Measure the power supply voltage and if the voltage is normal or not 208 230V If the power relay operates normally or not the voltage between power relay 4pin GND and 6pin GND are 187 229 207 253V Correction of the connection of the connector ...

Page 75: ...4 1 2 Temperature F C 4 20 5 15 14 10 23 5 32 0 41 5 50 10 59 15 68 20 77 25 86 30 95 35 104 40 113 45 122 50 131 55 140 60 149 65 158 70 167 75 176 80 Resistance kΩ Temperature F C 4 20 5 15 14 10 23 5 32 0 41 5 50 10 59 15 68 20 77 25 86 30 95 35 104 40 113 45 122 50 131 55 140 60 149 65 158 70 167 75 176 80 Resistance kΩ 10 15 5 20 0 100 150 50 200 0 10 15 5 20 0 100 150 50 200 Resistance kΩ 55...

Page 76: ...le confirmation through the trial operation Replacement procedures CASE 1 Before replacement the indoor unit can be turned on and the setting data can be read out by wired remote control operation EEPROM data read out 1 Replacement of P C board for Indoor unit servicing and power on 2 Writing the read out EEPROM data 3 Power reset for all indoor units connected to the remote control when the group...

Page 77: ... stop status It takes approx 1 min until the remote control operation is available again CODE No required at least 1 The CODE No for the Indoor unit type and Indoor unit capacity are required to set the rotation number setting of the fan 2 If the system indoor group addresses are different from those before replacement the auto address setting mode starts and the manual resetting may be required a...

Page 78: ...tes if the setting data is displayed 4 Change the CODE No DN to by pushing buttons for the temperature setting 5 Select the capacity by pushing buttons for the timer setting For example AP027 Type is set to 0012 Refer to table 3 6 Push SET button The setting completes if the setting data are displayed Fig 1 RBC AMT32UL B In case that power of the indoor units cannot be turned on individually Case ...

Page 79: ...perature setting As described above check the setting data and modify to the data put down in 1 Step 8 Repeat the steps 6 and 7 Step 9 After the setting completes push TEST button to return to the normal stop status It takes approx 1 min until the remote control operation is available again The CODE No DN are ranged from to The CODE No DN is not limited to be serial No Even after modifying the dat...

Page 80: ... System address Indoor unit address Group address Temperature range of cooling heating automatic SW control point Power failure automatic recovery Vent Fan Single operation Sensor SW Selection of static pressure Static pressure selection Timer setting wired remote control Power save operation 28 31 32 5d 60 D0 0000 None 0000 Not possible 0000 Body sensor 0000 Standard 0000 Available 0001 Standard ...

Page 81: ...lectric driver or an air driver as it can cause component damage The torque of 5 screws IC701 DB509 DB510 and Q590 is 0 41 lbs ft 0 55N m 7 Re connect the connectors Be sure that all the connectors are connected correctly and securely inserted 8 Install the cover then turn on the supply Check the operation 10 3 N F P C Board MCC 1551 Replacement Procedure 1 Turn off the power supply of the indoor ...

Page 82: ...e CN521 UART 5P Red CN22 Ground Faston terminal Control P C board MCC 1643 1 Detachment 1 Perform 1 of to remove the electrical parts box 2 Remove the connector of the befow No from the P C board WARNING Be sure to stop operation of the air conditioner before work and then turn off switch of the breaker CAUTION Be sure to put on gloves during working time otherwise an injury will be caused by a pa...

Page 83: ...e to wire in the electrical parts box as before NOTE First unlock the housing and then remove the connectors NOTE 2 Be sure to wire as before NOTE 1 Check if there is no missing or contact failure of the connectors 3 Attach the electrical parts box cover as before CN504 Uart 5P Blue CN505 Uart 5P Red CN500 Power supply terminal block 5P Black CN510 Reactor Faston terminal CN511 Reactor Faston term...

Page 84: ...TE 1 84 Noise filter P C board MCC 1551 1 Detachment 1 Perform 1 of to remove the electrical parts box 2 Remove the connector of the below No from the P C First unlock the housing and then remove the connectors CN01 Power supply Red wire CN02 Power supply White wire CN03 Power supply Red wire CN04 Power supply White wire 3 Remove the screw of the ground wire 4 Unlock the card edge spacers 4 positi...

Page 85: ...ctrical parts box as before 2 Be sure to wire in the electrical parts box as before NOTE 1 Check if there is no missing or contact failure of the connectors NOTE 2 Be sure to wire as before 3 Return terminal block assembly to the original position without pinching wires Confirm to hook the claw of terminal block assembly on the right side Then fix screw A and B 4 Attach the electrical parts box co...

Page 86: ... PMV motor 1 Detachment 1 Perform 1 of to remove the electrical parts box cover 2 Loosen the fixing screws of the inspection cover and open the inspection cover 3 Remove the connector of the PMV motor CN82 PMV motor 6P Blue 4 As shown in the right figure using the two spanners and remove the PMV motor 2 Attachment 1 Attach the PMV motor as before 2 Connect the connector of the PMV motor as before ...

Page 87: ...nging state by the fixing plate 5 Remove the fan assembly Wires of the fan motor CN703 CN704 CN705 screw C Hexagonal bolt screw B screw A Fan assembly Nose plate screw D Screw E Motor fixing plate CAUTION Weight of the fan assembly is about 66 lbs 30kg Handle it by 2 workers Ground screws 6 Remove the screws C M8 x 0 8 20mm 8 pcs 7 Loosen the hexagonal bolt of the fan and pull out the fan from the...

Page 88: ...m 2 pcs NOTE Fix the wiring of the motor on the electrical parts box side as right figure 2 Attach the ground screw 3 Put the fan in the fan case Attach the nose plate to the original position on the fan case NOTE Adjust the direction of the fan blade 4 Insert the fan to the shaft 5 Tighten the Screw C M8 x 0 8 20mm 8 pcs 6 Insert the fan to where the shaft of the fan motor stops and adjust the fl...

Page 89: ...etc CAUTION When removing the drain pan do not hold the drain socket Water leakage may occur Bottom plate Drain side Screw B Screw A Drain pan Drain pan supporter Drain pan pull out direction Drain socket Sensor TC1 TC2 TCJ 2 Attachment 1 Attach the TC1 sensor TC2 sensor and TCJ sensor to the original position 2 Attach the inspection cover as before 3 Attach the wires of TC1 sensor TC2 sensor and ...

Page 90: ...ƚŚĞ ƐĐƌĞǁ Dϰ ǆ Ϭ ϰΗ ϭϬŵŵͿ ϱ ƉĐƐͿ ŽĨ ƚŚĞ ƌŝŐŚƚ ƐŝĚĞ ƉĂŶĞů ϴͿ tŚŝůĞ ŚŽůĚŝŶŐ ƚŚĞ ŚĞĂƚ ĞǆĐŚĂŶŐĞƌ ƌĞŵŽǀĞ ƚŚĞ ƐĐƌĞǁ Dϰ ǆ Ϭ ϰΗ ϭϬŵŵͿ Ϯ ƉĐƐͿ ĂŶĚ ƚŚĞŶ ƚĂŬĞ ŽƵƚ ƚŚĞ ŚĞĂƚ ĞǆĐŚĂŶŐĞƌ ƐůŽǁůǇ Evaporator partition back Screw B Screw E Bushing ĐƌĞǁ ĐƌĞǁ ǀĂƉŽƌĂƚŽƌ ƉĂƌƚŝƚŝŽŶ ĚŽǁŶͿ Ϯ ƚƚĂĐŚŵĞŶƚ ϭͿ ƚƚĂĐŚ ƚŚĞ ŚĞĂƚ ĞǆĐŚĂŶŐĞƌ ƚŽ ƚŚĞ ŽƌŝŐŝŶĂů ƉŽƐŝƚŝŽŶ ĐƌĞǁ Dϰ ǆ Ϭ ϰΗ ϭϬŵŵͿ Ϯ ƉĐƐͿ ϮͿ ŝǆ ƚŚĞ ƐĐƌĞǁ ŽŶ ƚŚĞ ƌŝŐŚƚ ƐŝĚĞ ƉĂŶĞů ĂƐ ď...

Page 91: ...s box 2 Attachment Attach the TA sensor to the original position 2 Attach the wires of TA sensor in the holder as before 3 Attach the electrical parts box as before screws Reactor Reactor cover CN511 CN510 Reactor assembly 13 1 Detachment 1 Perform 1 of and 1 of 7 2 Remove the connector of the wires of the reactor from the fan control P C board 3 Remove the screws fixing the reactor cover Slide th...

Page 92: ...12 EXPLODED VIEWS AND PARTS LIST 12 1 MMD AP0726HP UL MMD AP0966HP UL 220 222 221 206 222 217 203 205 204 201 218 219 223 225 224 202 226 214 207 208 209 213 216 215 212 210 211 215 92 ...

Page 93: ...46473 MOTOR PMV 1 1 211 43T46417 SHEET PMV 1 1 212 43T46472 PMV 1 1 213 43T47387 STRAINER LIQUID 1 1 214 43T47407 STRAINER GAS 1 1 215 43T19333 HOLDER SENSOR 2 2 216 43T19321 HOLDER SENSOR GAS 1 1 217 43T72331 PAN ASSY DRAIN 1 1 218 43T70315 HOSE DRAIN 1 1 219 43T83311 BAND HOSE 1 1 220 43T39375 FLANGE UPPER 1 1 221 43T39376 FLANGE LOWER 1 1 222 43T39377 FLANGE SIDE 2 2 223 43T58332 REACTOR 1 1 22...

Page 94: ...1 1 403 43T50477 SERVICE SENSOR 1 1 404 43T60458 SERV TERMINAL 1 1 405 43T60362 TERMINAL 1 1 406 43T6V762 ASM PCB SERV 1 1 407 43T6V670 ASM PCB SERV 1 1 408 43T6V671 ASM PCB SERV 1 1 409 43T50345 THERMISTOR PTC 1 1 410 43T54324 POWER RELAY 1 1 411 43T63356 HOLDER TA 1 1 412 43459017 ASM PCB OP 1 1 413 43T63348 CLAMP DOWN 1 1 414 43T63349 CLAMP UP 1 1 Location No Part No Description Q ty Set MMD 94...

Page 95: ...tration buildings however the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space individual control energy conservation by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners If a single uni...

Page 96: ...TOSHIBA CARRIER THAILAND CO LTD 144 9 MOO 5 BANGKADI INDUSTRIAL PARK TIVANON ROAD TAMBOL BANGKADI AMPHUR MUANG PATHUMTHANI 12000 THAILAND ...

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