Toshiba MMD- AP0724H2UL Service Manual Download Page 73

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Replacing the fan motor

Remove the electrical control cover.
(2 screws)

Remove the fan motor lead.

(1) Remove the fan motor lead

connector. (3 positions)

(2) Remove the fan motor lead from the

terminal board (terminal No. F1 –
F3). (3 positions)

Remove the TC1 / TC2 / TA / TCJ
sensor leads and PMV coil lead from
the control circuit board connector.

Remove the electrical control box
from the side board. (2 screws)

Remove the side board from the main
unit. (M5 screws, 8 pcs)

Remove the three screws fixing the
fan assembly, and slide the assembly
along the guide rail to pull it out. (3
M5 tap tight screws)

Loosen the screws fixing the fan.
(M8)

Remove the two screws fixing the
motor band.

Replace the motor.

TC1 / TC2 / TCJ
sensor leads

PMV coil lead

TA sensor
lead

Electrical
control
box

Side
board

Electrical
control box
cover

Fan motor lead
connector

Fan motor
lead

Electrical control box

Terminal
board

Screws

Motor band

Fan case

Fan motor

M5 screws, 3 pcs

Fixing screw

Fan

Guide rail

Motor band

Fan case

Fan motor

M5 screws, 3 pcs

Fixing screw

Fan

Guide rail

10. DETACHMENTS

WARNING

Before replacement of the parts, be sure to stop

operation of the air conditioner and turn switch of the

breaker.

CAUTION

Be sure to put on the gloves at disassembling work:

otherwise an injuly will be caused by a part. etc.

Summary of Contents for MMD- AP0724H2UL

Page 1: ... 1 R410A SERVICE MANUAL AIR CONDITIONER MULTI TYPE High Static DuctedType MMD AP0724H2UL MMD AP0964H2UL PRINTED IN JAPAN Aug 2015 ToMo FILE NO A10 1506 ...

Page 2: ...NAL VIEWS 9 3 WIRING DIAGRAM 10 4 PARTS RATING 11 5 FAN CHARACTERISTIC 12 6 REFRIGERATING CYCLE DIAGRAM 15 7 CONTROL OUTLINE 16 8 APPLIED CONTROL AND FUNCTION 23 9 TROUBLESHOOTING 45 10 DETACHMENTS 73 11 P C BOARD EXCHANGE PROCEDURES 75 12 EXPLODED VIEWS AND PARTS LIST 80 ...

Page 3: ...d 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 caution...

Page 4: ...ise 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 refri...

Page 5: ...f 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 Manu...

Page 6: ...not mix 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 earth 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...

Page 7: ...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 Clamp met...

Page 8: ... Upper limit cfm 2002 2944 Air filter Gas side In Liquid side In Drain port Nominal dia In 208V High Mid Low 3 dB A 230V High Mid Low 3 dB A 49 2 Packing 24 0 55 3 Sound puressure level 2 51 49 47 53 51 50 Electrical charastaristics 230V 208 230V 1phase 60Hz Zinc hot dipping steel plate Dimension Unit 18 5 54 3 External static pressure 1 Air flow limt 61 8 Total weight 362 417 Finned tube Field su...

Page 9: ... heat exchanger and it may cause failure or water leak in air conditioner 2 Leave sufficient space to remove the air filter when you attach it CPIKPI DQNV OQWPVKPI RKVEJ CPIKPI DQNV OQWPVKPI RKVEJ Electric parts box Hole for hanging bolt 4 Ø1 2 12 3 6 92 QT OQTG QT OQTG Air discharge port Air suction port Drain pipe connecting port V25 Taper screw for R1 1 25 4 pipes Gas side Ø7 8 22 2 Brazed Refr...

Page 10: ... short dashed line indicate the accessories indicates the terminal block indicates the connection terminal indicates the connector on the control P C board 2 indicates the protection ground 3 indicates the control P C board 4 A position is connected to terminal block when change to static pressure exchange the lead wire of arrow ޓ position after check the terminal number as figure and lead wire s ...

Page 11: ...se motor Pulse motor valve TA sensor Lead wire TC1 sensor TC2 sensor TCJ sensor STF 200 370 4AR AC 450 V 12 μF EDM MD12TF 3 EDM BAOYGTF 1 length 818 mm Ø4 size lead wire length 2000 mm Vinyl tube Blue Ø6 size lead wire length 2000 mm Vinyl tube Black Ø6 size lead wire length 2000 mm Vinyl tube Red ...

Page 12: ...0 1800 1900 2000 2100 2200 2300 2400 2500 2600 Air flow rate cfm Fan motor current A Fan motor current A High tap High tap Middle tap Middle tap Low tap Low tap 䇭 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 Air flow rate cfm 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 Air flow rate cfm 䇭䇭 Since external static pre...

Page 13: ... 3000 Air flow rate cfm 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 Air flow rate cfm 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 Air flow rate cfm External static pressure in WG E External static pressure in WG E Fan motor current A Fan motor current A Air flow rate upper limit Air flow rate up...

Page 14: ... Blue 0 929 Blue 0 580 F3 Orange 1 212 Orange 0 896 L U 2 H 4 6 9 0 P A D M M e m a n l e d o M z H 0 6 V 8 0 2 z H 0 5 V 0 3 2 y c n e u q e r F e g a t l o V Fan motor wiring Terminal block No Wire color External static pressure in WG Wire color External static pressure in WG F1 Yellow 0 459 Yellow 0 062 F2 Blue 0 734 Blue 0 317 F3 Orange 1 099 Orange 0 739 F1 F2 F3 F4 FM F1 F2 F3 F4 FM F1 F2 F3...

Page 15: ...lue 1 Controls super heat in cooling operation 2 Controls under cool in heating operation 3 Recovers refrigerant oil in cooling operation 4 Recovers refrigerant oil in heating operation Connector CN104 2P Yellow 1 Detects indoor suction temperature Connector CN100 3P Brown 1 Controls PMV super heat in cooling operation Connector CN101 2P Black 1 Controls PMV under cool in heating operation Connect...

Page 16: ...is again displayed on the remote controller 1 Based on the operation mode selecting command from the remote controller the operation mode is selected 1 Adjustment range Remote controller setup temperature F C Remarks Air speed rpm Air direction adjustment Wired type Wireless type COOL DRY 64 F 18 C to 84 F 29 C 64 F 18 C to 86 F 30 C HEAT 64 F 18 C to 84 C 29 C 61 F 16 C to 86 F 30 C 2 Using the I...

Page 17: ...L HEAT S3 S5 S7 S9 SB SD SF S0 SD SB S9 S7 S5 S3 S0 Controlling operation in case when thermo of remote controller works is same as a case when thermo of the body works If the air speed has been changed once it is not changed for 3 minutes However when the air volume is exchanged the air speed changes When cooling operation has started select a downward slope for the air speed that is the high pos...

Page 18: ...temperature of TC2 sensor and TCJ sensor is compared with temperature of TC1 sensor and then the lower temperature is used to set the upper limit of the fan tap When B zone has continued for 6 minutes the opera tion shifts to C zone In defrost time the control point is set to 10 8 F 6 C TCJ Temperature of indoor heat exchanger sensor In D and E zones priority is given to remote controller air spee...

Page 19: ... for 30 minutes the thermostat is forcedly off In N zone the timer count is interrupted and held When shifting to M zone again the timer count restarts and continues If L zone is detected the timer is cleared and the operation returns to normal operation Reset conditions 1 TC1 54 F 12 C and TC2 54 F 12 C and TCJ 54 F 12 C 2 20 minutes passed after stop P2 Q2 F C L N M value When the power supply i...

Page 20: ...r the thermostat is OFF giving prior to COOL HEAT selection READY for operation and protective control 1 The filter sign is displayed with LC by sending the filter reset signal to the remote controller when the specified time 2500H elapsed as a result of integration of the operation time of the indoor fan 2 The integrated timer is cleared when the filter reset signal is received from the remote co...

Page 21: ...1 Normal thermo OFF During heating the indoor unit goes thermo 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 thermo OFF HEAT operation is unavailable because at least one indoor unit is operating in COOL DRY mode under priority c...

Page 22: ...egment goes on the screen of the wired remote controller 3 The request capacity ratio is restricted to approx 75 during save operation 4 If the save operation was validated the contents are held during the operation stop the operation mode change and the resetting of power supply Therefore the operation at the next time also will be activated with Save operation is valid Remarks ...

Page 23: ...n motor relay circuit External output In operation Alarm Getting ready Thermostat ON COOL HEAT FAN AC synchronization signal input circuit BUS communication circuit TA sensor TC1 sensor TC2 sensor TCJ sensor Driver Remote controller communication circuit CPU H8 3039 Indoor outdoor communication Outdoor unit Power source 208 230 1 60 Outdoor unit Outdoor unit Power source Power source 2 3 Sameas le...

Page 24: ... TCJ sensor In operation Alarm Getting ready Thermostat ON COOL HEAT FAN AC synchronization signal input circuit BUS communication circuit External output Indoor outdoor communication Outdoor unit Power source 208 230 1 60 Outdoor unit Outdoor unit Power source Power source Sameas left Sameas left 2 3 Up to 8 units can be connected Wireless remote controller kit Sensor P C board Remote controller ...

Page 25: ...put circuit BUS communication circuit External output Indoor outdoor communication Outdoor unit Power source 208 230 1 60 Outdoor unit Outdoor unit Power source Power source Sameas left Sameas left 2 3 Up to 8 units can be connected Wireless remote controller kit Remote controller communication circuit Sensor circuit Display section EEPROM DC5V CPU Main Simple wired remote controller up to 2 units...

Page 26: ...sensor CN100 CHK CN071 DC5V DISP CN72 DC5V Remote controller CN41 Optional output CN060 DC12V HA T10 CN061 DC12V Remote controller power supply LED D203 Also used for communication of the central control system CN040 PMV output CN082 DC12V Microcomputer operation LED D002 Power supply transformer Secondary side AC11V 14V 20V CN075 Power supply CN067 8 1 4 Indoor Printed Circuit Board MCC 1403 ...

Page 27: ...ssor ON 4 Cooling output ON while air conditioner in cooling or related operation COOL DRY or cooling under AUTO mode 5 Heating output ON while air conditioner in heating operation HEAT or heating under AUTO mode 6 Fan output ON while indoor fan ON air cleaner in use or via interlock wiring External error input CN80 1 DC12 V COM Generates test code L30 and automatically shuts down air conditioner ...

Page 28: ...ay in the display part disappears and status becomes the normal stop status 8 2 Functions at test run Cooling Heating test run check The test run for cooling heating can be performed from either indoor remote controller or outdoor interface P C board 1 Start Finish operation of test run Test run from indoor remote controller Wired remote controller Refer to the below item of Test run of the wired ...

Page 29: ...e set button Temperature set button After checking the receiving sound Pi After checking the receiving sound Pi immediately push Temperature set button to immediately push Temperature set button to set to 66 F 19 C set to 84 F 29 C After checking the receiving sound Pi After checking the receiving sound Pi immediately push Temperature set button to immediately push Temperature set button to set to...

Page 30: ...e normal Abnormal time Either one of float SW or fan motor is abnormal 2 Restricted to the normal time if short circuiting DISP pin CN72 on the indoor P C board in addition to short circuit of CHK pin CN71 on the indoor P C board the minimum opening degree 30pls can be set to the indoor PMV only When open DISP pin the maximum opening degree 1500pls can be obtained again How to clear Open CHK pin W...

Page 31: ... indoor unit 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 s...

Page 32: ... No 1 unit to 0064 No 64 unit 0099 Unfixed 14 Group address 0000 Individual 0002 Follower unit of group 0001 Header unit of group 0099 Unfixed 28 Automatic restart of power failure 0000 None 0001 Restart 0001 Restart 2A Selection of option error input CN213 0000 Filter input 0002 External interlock 0001 Alarm input Option parts 0002 External interlock 2E HA terminal CN61 select 0000 Usual 0002 Fir...

Page 33: ...ion signal Output during normal operation 3 Error signal Output during alarm Serial communication error or indoor outdoor protective device operation 2 Wiring diagram using remote control interface TCB IFCB 4UL Input IFCB 4UL No voltage ON OFF serial signal Output No voltage contact for operation error display Contact capacity Below Max AC240V 0 5A 1 2 3 4 5 6 CN61 T10 YEL 1 2 3 4 1 2 3 4 5 6 CN13...

Page 34: ...ted indoor unit turns on 2 Every pushing UNIT LOUVER button button at left side 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 temperature setup button specify the CODE No 31 4 Using the timer time button select the SET DATA At shipment 0000 0000 0000 0000 0000 The setup data are as follows SET DATA 000...

Page 35: ... taken out from the card switch box When the card switch box does not perform the above contact operation convert it using a relay with b contact 2 Operation Handle the wired remote controller switch in the following procedure Use the wired remote controller switch during stop of the system 1 Push concurrently SET CL buttons for 4 seconds or more 2 Using the temperature setup button specify the CO...

Page 36: ...button OK when display goes on 8 Group address Using the temperature setup buttons set 14 14 14 14 14 to the CODE No 9 Using timer time buttons set 0000 0000 0000 0000 0000 to Individual 0001 0001 0001 0001 0001 to Header unit and 0002 0002 0002 0002 0002 to follower unit 10 Push SET button OK when display goes on 11 Push TEST button Setup completes The status returns to the usual stop status Note...

Page 37: ...his procedure the indoor units in group control stop Procedure The indoor unit numbers in the group control are successively displayed and fan louver and drain pump of the corresponding indoor unit are turned on Follow to the procedure during operation 1 Push VENT and TEST buttons simultaneously for 4 seconds or more Unit No is displayed Fans and louvers of all the indoor units in the group contro...

Page 38: ... LOUVER SWING FIX button Ø 3 Determine the selected line address using SET button The address of the indoor unit connected to the refrigerant piping of the selected outdoor unit is dis played and the fan and the louver are on Ø 4 Every pushing UNIT LOUVER button button at left side the indoor unit No in the identical piping is displayed one after the other Only fan and louver of the selected indoo...

Page 39: ...n a group the fan and louvers of the selected unit will be energized Ø 3 Push the TEMP buttons repeatedly to select 13 13 13 13 13 for CODE No Ø 4 Push the TIME buttons repeatedly to change the value indicated in the SET DATA sec tion 5 Push the SET SET button to save address Ø 6 Push left and of the UNIT LOUVER UNIT LOUVER button repeatedly to select another indoor unit addresses to change Repeat...

Page 40: ...AC Address Change are displayed Ø 2 Select line address using UNIT LOUVER SWING FIX button Ø 3 Push the SET button The address of the indoor unit connected to the refrigerant piping of the selected outdoor unit is displayed and the fan and the louver are on First the current indoor address is displayed Line address is not displayed Ø 4 TIME button push up down the indoor address of the SET DATA Th...

Page 41: ...e following figure is counted as 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 with 5 seconds interval When 0000 0000 0000 0000 0000 appear the error was cleared However counting from 0005 0005 0005 0005 0005 is repeated on the display screen 4 When pushing TEST button the status becomes normal ...

Page 42: ...service monitor mode The service monitor goes on and firstly the temperature of the CODE No 00 00 00 00 00 is displayed Ø 2 Push TEMP button to change CODE No CODE No to the CODE No to be monitored For display code refer to the following table Ø 3 Push UNIT LOUVER button button at left side to change to item to be monitored The sensor temperature of indoor unit or outdoor unit in its refrigerant l...

Page 43: ...or unit individual data 2 4 50 60 Compressor 1 revolutions 10 rps 0642 64 2rps 51 61 Compressor 2 revolutions 10 rps 52 62 Compressor 3 revolutions 10 rps 53 63 Outdoor fan mode 1 mode 0058 58 mode 54 64 Compressor IPDU 1 heat sink temperature 1 F 0075 75 F 24 C 55 65 Compressor IPDU 2 heat sink temperature 1 F 56 66 Compressor IPDU 3 heat sink temperature 1 F 57 67 Outdoor fan IPDU heat sink temp...

Page 44: ...elected indoor unit operate Procedure 3 1 Using temp setup TEMP buttons specify CODE No 33 33 33 33 33 CODE No 33 33 33 33 33 Fahrenheit display 2 Using timer TIME buttons change the line address from 0001 0001 0001 0001 0001 to 0000 0000 0000 0000 0000 3 Push SET button In this time the setup finishes when the display changes from flashing to lighting Procedure 4 After check of the changed conten...

Page 45: ...it just be the 3 minute delay period 3 minutes after compressor shutdown Could it just be the air conditioner having gone thermo OFF Could it just be the air conditioner operating in fan mode or put on the timer Could it just be the system going through initial communication 2 An indoor fan would not start Could it just be cold air discharge prevention control which is part of heating 3 An outdoor...

Page 46: ...ween main controller and motor microcontroller is faulty E18 Error in periodic communication between indoor header and follower unit Periodic communication between indoor header and follower units cannot be maintained F01 ALT Indoor heat exchanger temperature sensor TCJ error Heat exchanger temperature sensor TCJ has been open short circuited F02 ALT Indoor heat exchanger temperature sensor TC2 er...

Page 47: ...een set as master remote controller in two remote controller control alarm and shutdown for header unit and continued operation for follower unit Check code Display of receiving unit Typical fault site Description of error TCC LINK central control Outdoor 7 segment display Indicator light block Sub code Flash C05 No indication when main remote controller also in use Faulty central control communic...

Page 48: ...ant line E20 Connection to other refrigerant line found during automatic address setting Indoor unit from other refrigerant line is detected while indoor automatic address setting is in progress E23 E23 Outdoor outdoor communication transmission error Signal cannot be transmitted to other outdoor units E25 E25 Duplicated follower outdoor address There is duplication in outdoor addresses set manual...

Page 49: ...ge temperature sensor TD2 has been detected H16 01 TK1 oil circuit error 02 TK2 oil circuit error 03 TK3 oil circuit error 04 TK4 oil circuit error 05 TK5 oil circuit error H16 Oil level detection circuit error No temperature change is detected by temperature sensor for oil level detection TK1 5 despite compressor having been started H25 H25 Outdoor discharge temperature sensor TD3 wiring error Wi...

Page 50: ...circuit indicates liquid backflow operation P15 01 TS condition 02 TD condition P15 ALT Gas leak detection Outdoor suction temperature sensor TS1 detects sustained and repeated high temperatures that exceed standard value P17 P17 ALT Outdoor discharge TD2 temperature error Outdoor discharge temperature sensor TD2 detects abnormally high temperature P18 P18 ALT Outdoor discharge TD3 temperature err...

Page 51: ...ted H03 01 Compressor 1 02 Compressor 2 03 Compressor 3 H03 Current detection circuit error Abnormal current is detected while inverter compressor is turned off P04 01 Compressor 1 02 Compressor 2 03 Compressor 3 P04 ALT Activation of high pressure SW High pressure SW is activated P07 01 Compressor 1 02 Compressor 2 03 Compressor 3 P07 ALT Heat sink overheating error Temperature sensor built into ...

Page 52: ...E F H J L P 7 segment display symbols Corresponding alphanumerical letters 9 3 Troubleshooting Based on Information Displayed on Remote Controller Using main remote controller RBC AMT32UL 1 Checking and testing When a fault occurs to an air conditioner a check code and indoor unit No are displayed on the display window of the remote controller Check codes are only displayed while the air condition...

Page 53: ...indoor units connected overloading E19 Error in number of outdoor header units E20 Detection of refrigerant piping communication error during automatic address setting E23 Faulty transmission in outdoor outdoor communication E25 Duplicated follower outdoor address E26 Faulty reception in outdoor outdoor communication dropping out of outdoor unit E28 Outdoor follower unit error E31 IPDU communicati...

Page 54: ...discharge temperature sensor TD1 H06 Abnormal drop in low pressure sensor Ps reading Protective shutdown of outdoor unit H07 Abnormal drop in oil level H08 Error in temperature sensor for oil level detection circuit TK1 TK2 TK3 TK4 or TK5 H15 Wiring installation error or detachment of outdoor discharge temperature sensor TD2 H16 Oil level detection circuit error Error in outdoor unit TK1 TK2 TK3 T...

Page 55: ...est run in progress Setting incompatibility automatic cooling heating setting for model incapable of it and heating setting for cooling only model Light block Check code Cause of fault Operation Synchronized blinking Timer Ready Operation Timer Synchronized blinking Ready Alternate blinking Operation Timer Ready ...

Page 56: ...cation error detected at indoor end Stop of corresponding unit There is no communication from remote controller including wireless or network adaptor Check remote controller and network adaptor wiring E04 Indoor unit Indoor outdoor communication circuit error detected at indoor end Stop of corresponding unit Indoor unit is not receiving signal from outdoor unit Check order in which power was turne...

Page 57: ... in progress Outdoor automatic address setting is started while automatic address setting for indoor units is in progress Perform automatic address setting again after disconnecting communication cable to that refrigerant line E15 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...

Page 58: ...ted 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 fo...

Page 59: ... of corresponding unit Sensor resistance is infinity or zero open short circuit Check connection of TC1 sensor connector and wiring Check resistance characteristics of TC1 sensor Check for defect in indoor P C board F04 F04 I F TD1 sensor error All stop Sensor resistance is infinity or zero open short circuit Check connection of TD1 sensor connector Check resistance characteristics of TD1 sensor C...

Page 60: ...or TE1 TL All stop During compressor operation in HEAT mode TE1 continuously provides temperature reading higher than indicated by TL by at least specified margin for 3 minutes or more Check installation of TE1 and TL sensors Check resistance characteristics of TE1 and TL sensors Check for outdoor P C board I F error F16 F16 I F Outdoor pressure sensor wiring error Pd Ps All stop Readings of high ...

Page 61: ... wiring particularly for open phase Check connection of connectors terminals on A3 IPDU P C board Check conductivity of case heater Check for refrigerant entrapment 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 03 Compressor 3 side IPDU Current detection circuit error All stop Current flow of at least specifie...

Page 62: ...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 I F All stop Sensor resistance is infinity or zero open short circuit Check co...

Page 63: ...for disconnection of TK3 sensor Check resistance characteristics of TK3 sensor Check for connection error involving TK1 TK2 TK3 TK4 and TK5 sensors Check for faulty operation in SV3E or SV3F valve Check for clogging in oil equalizing circuit capillary and faulty operation in check valve Check for refrigerant entrapment inside compressor No temperature change is detected by TK4 despite compressor h...

Page 64: ...7 Indoor unit Connection of group control cable to stand alone indoor unit Stop of corresponding unit There is at least one stand alone indoor unit to which group control cable is connected Check indoor addresses L08 L08 Indoor unit 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 wh...

Page 65: ...in external device 2 Check for defect in indoor P C board When external device is not connected to CN213 connector 1 Check for defect in indoor P C board I F Extended IC error Continued operation There is part failure in P C board I F Check outdoor P C board I F P01 Indoor unit Indoor fan motor error Stop of corresponding unit Check the lock of fan motor AC fan Check wiring P03 P03 I F Discharge t...

Page 66: ...w reduction Check opening status of indoor PMV Check indoor outdoor communication line for wiring error Check for faulty operation of check valve in discharge pipe convergent section Check gas balancing SV4 valve circuit Check SV5 valve circuit Check for refrigerant overcharging P05 P05 00 I F Detection of open phase phase sequence All stop Open phase is detected when power is turned on Inverter D...

Page 67: ...s side liquid side to confirm full opening Check PMVs PMV1 2 for clogging Check resistance characteristics of TS1 sensor Check for defect in 4 way valve Check SV4 circuit for leakage 02 TD condition I F Gas leak detection TD condition All stop Protective shutdown due to sustained discharge temperature TD1 TD2 or TD3 at or above 226 F 108 C Check for insufficiency in refrigerant quantity Check PMVs...

Page 68: ...f high pressure protection All stop 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 PMVs PMV1 2 4 for clogging Check indoor outdoor heat exchangers for clogging Check for short circuiting of ou...

Page 69: ...ck fan motor Check connection of fan motor connector Check for defect in fan IPDU P C board All stop Sub code C Higher temperature than the specified value is detected during operation of the fan Check fan motor Check for defect in fan IPDU P C board All stop Sub code D The resistance value of the sensor is infinite or zero open or short circuit Check for defect in fan IPDU P C board All stop Sub ...

Page 70: ...r defect in central control communication line Check termination resistance 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 C12 General purpose device I F Blanket alarm for general purpose device control interface Continued operation Error signal is input to control in...

Page 71: ...iagram Checking procedure RED WHI BLK ORN BLU YEL GRY 䌾 Fan motor STF200 370 4AR Measure the resistance value of each winding by using the tester Black Red White Black Yellow Black White Orange White Blue 12 1 0 97 Ω 12 4 0 99 Ω 3 94 0 32 Ω 13 47 1 08 Ω 15 02 1 20 Ω ...

Page 72: ...mperature 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 F 10 C ...

Page 73: ... guide rail to pull it out 3 M5 tap tight screws 7 Loosen the screws fixing the fan M8 8 Remove the two screws fixing the motor band 9 Replace the motor TC1 TC2 TCJ sensor leads PMV coil lead TAsensor lead Electrical control box Side board Electrical controlbox cover Fan motor lead connector Fan motor lead Electrical control box Terminal board Screws Motor band Fan case Fan motor M5 screws 3 pcs F...

Page 74: ... 2 Fuse cover 1 Screw Fuses Replacing the fuse 1 When exchanging the fuse loosen the 1 screw and lift up the 2 fuse cover 2 After exchanging the fuse return the 2 fuse cover to the original position and fix it with 1 screw securely ޓ ...

Page 75: ... header follower designation and confirm the integrity of the refrigerating cycle by conducting a test operation etc Replacement procedure Method 1 If it is possible to turn on the indoor unit and read the setting data from the P C board to be replaced via a wired remote controller Reading EEPROM data Procedure 1 Ø Ø Ø Ø Ø Replacing P C board and turning on power Procedure 2 Ø Ø Ø Ø Ø Writing EEPR...

Page 76: ...is displayed in turn The fan of the selected indoor unit comes on with the louvers swinging depending on the model 3 The TEMP button allows you to move the CODE No DN code up down by one place 4 First change the CODE No DN code from 10 10 10 10 10 to 01 01 01 01 01 To set filter sign lighting time Jot down the setting data displayed 5 Change the CODE No DN code using the TEMP button Again jot down...

Page 77: ...emote controller wiring to the terminals turn on the indoor unit and proceed to Procedure 3 If this method cannot be used proceed to the alternative method described below Case 2 C If it is not possible to selectively turn on the indoor unit being serviced Case 2 a Remove the CN41 connectors of all other indoor units in the same group b Turn on the indoor unit and proceed to Procedure 3 MCC 1403 C...

Page 78: ...e For example 0012 is for the 027 type See the CODE No list 6 Push the SET button The display should change from flashing to steady 7 Push the button to bring the system back to normal off state 5 Next write any setting changes made on site after installation such as address settings in the EEPROM Perform the tasks specified in step 1 again 6 Use the TEMP button to set the CODE No DN code to 01 01...

Page 79: ...3 6 F 2 C 0000 Standard 0000 Heat pump According to model type According to capacity type 0099 Unfixed 0099 Unfixed 0099 Unfixed 0001 Available 0002 External emergency input 0000 Thermo ON 0000 Operation input 0000 Available 0000 Available Filter sign lighting time Dirty state of filter Central control address Heating suction temp shift PRE DEF indication selection Cooling only Type Indoor unit ca...

Page 80: ... 80 12 EXPLODED VIEWS AND PARTS LIST MMD AP0724H2UL AP0964H2UL ...

Page 81: ...07 208 209 210 211 212 213 214 215 216 217 223 226 227 228 229 MOTOR FAN MOTOR PMV EDM MD12TF 3 BODY PMV EVAPORATOR ASSY DISTRIBUTOR ASSY CASE FAN FAN NUT FLARE 1 2 IN SOCKET HOLDER SENSOR BONNET 1 2 IN STRAINER BAND MOTOR LEFT BAND MOTOR RIGHT HOLDER SENSOR TS SHEET PMV STRAINER LABEL WARNING REMOTE CONTROLLER SX TA01UE REMOTE CONTROLLER SX TB01UE REMOTE CONTROLLER SX UA01UE REMOTE CONTROLLER WX ...

Page 82: ... AP0964H2UL 43050425 43F50426 43F60859 43150320 43154173 43155219 43158198 43160575 43160554 43160637 43160582 4316V502 4316V345 43060157 401 402 403 404 405 406 407 408 409 410 411 412 413 414 SENSOR ASSY TC F6 SENSOR TA FUSE BLOCK 30A 250V SENSOR ASSY TG F4 RELAY LY2F L AC230V CAPACITOR 450VAC 12UF TRANSFORMER TT 12 TERMINAL BLOCK 2P 20A TERMINAL BLOCK 4P 20A FUSE 10A TERMINAL 4P 1A PC BOARD ASS...

Page 83: ...entration 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 u...

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