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MXZ-8B140VA MXZ-8B160VA MXZ-8B140YA MXZ-8B160YA

1. OC Outdoor unit NOTE The indoor units can be BC Branch box connected to any of the oc IC Indoor unit oc 5 connectors RC Remot troll 5 branch type or 3 connectors CONOS 3 branch type of the branch box BC 5 branch type BC 3 branch type BC 5 branch type BC 3 branch type A B C D C A B IC IC IC IC IC IC IC IC IC IC IC IC IC R IR R R R R c c IC RC RC R R C C C 11 2 STANDARD SYSTEMS 11 2 1 Only 3 branch type 11 2 2 Only 5 branch type 11 2 3 2 branch boxes 3 branch type OC OC OC BC 3 branch type BC 5 branch type BC 3 branch type BC 3 branch type A B C A B C D E A B C A B C IC IC IC IC IC IC IC IC IC IC IC IC IC IC R R R R R R R R R R R R R R C C C C C C C C C C C C C 11 2 4 2 branch boxes 5 branch type maximum 8 indoor units OC BC 5 branch type BC 5 branch type A B C D E A B C D E SEM H 1 1 Up to 2 branch boxes can be connected to AB He a single outdoor unit ehh WM NM B B 2 Up to 8 indoor units can be con
2. Example 2 gt 9 2 WIRING TO P100 INDOOR UNITS Fig 9 2 in case of wiring to P100 indoor unit s When wiring P100 indoor unit s only use PAC AK52BC Branch branch box PAC AK52BC only When wiring a single P100 indoor unit use TB3A 0 r a 51 t 4 G6D AROOM sD 1 14 12 i P100 Notes e DHH HED When wiring a single P100 indoor unit ONLY use Circuit les 3 cem If a single P100 indoor unit is wired to the other terminal breaker DIL 50 G i block an alarm will be activated and the indoor unit will OHE S i not operate T IN When a single P100 indoor unit is wired to TB3A do not mec 04 NE B ROOM wire any indoor unit to TB3B Otherwise an alarm will S ile K mi be activated and the indoor unit will not operate 53 LI G i TB3C TB3D and are available for wiring of indoor Spe units that are not P100 i 2 i When wiring two P100 indoor units use TB3A and TB3C S3 T i Notes I When wiring two P100 indoor units ONLY use TB3A G gt and TB3C If two P100 indoor units are wired to the other terminal SSS blocks an alarm will be activated and the indoor units Fig 9 2 will not operate When two P100 indoor units are wired to TB3A and TB3C respectively do not wire an
3. 1 160Y ON OFF LEV opening setting function for stopping unit during heating operation Changed Normal Switching function of defrosting prohibited time For high humidity Normal Always Switching the Input Current Limit Level 3 A down Normal Before turning the power on During the FAN or COOL mode and thermo OFF in heating operation set the opening of liner expansion valve on branch box 2 Function of connector Types Connector Function Active Inactive Action by Pin short operation Pin 1 2 Short Pin 2 3 Short While unit stopping Effective timing LEV opening function at start up Connector CN31 Open a little bit Normal When power supply ON OCH480D 46 Outdoor unit operation monitor function Digital indicator LED3 displays 2 digit number or code to inform operation condition and the meaning of check code by controlling DIP SW2 on outdoor controller Operation indicator SW2 Indicator change of self diagnosis SW2 setting Display detail Explanation for display ON 123456 Digital indicator LED3 working details Be sure that 1 to 6 in the SW2 are set to OFF 1 Display when the power supply is ON 4 second When the power supply is ON blinking displays by turns interval Wait for 4 minutes at the longest 2 When the display lig
4. Fan step on error occurring 0 to 15 LEV opening pulse on error occurring 0 to 500 0 to 500 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 130 pulse 0 5 secs 0 5 secs 2 secs 30 gt Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 For the use of a P100 indoor unit the sum of 2 pulse values is displayed Example Indoor unit 1 P100 750 pulse Indoor unit 2 P100 other 400 pulse SW1 Display 500 250 400 Indoor unit 1 W 5 0 0 1 Indoor unit 2 Indoor room temperature on error occurring 8 to 39 8 to 39 Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 2 amp A 4 S S So OCH480D 52 ss The black square m indicates a switch position SW2 setting Display detail Explanation for display Indoor pipe temperature Liquid on 39 to 88 error occurring S 39 to 88 When the temperature is 0 C or less and te
5. Outdoor heatsink temperature 8 40 to 200 error occurring When the temperature is 0 C or less and 40 to 200 temperature are displayed by turns When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns Discharge superheat on error occurring 0 to 255 When the temperature is 100 or more hundreds 0 to 255 digit tens digit and ones digit are displayed by turns Example When 150 0 5 secs 0 5 secs 2 secs gt 50 Sub cool on error occurring SC 0 to 130 0 to 130 When the temperature is 100 or more hundreds digit tens digit and ones digit are displayed by turns Example When 115 0 5 secs 0 5 2 gt 15 gt OCH480D 53 aa The black square m indicates a switch position SW2 setting Display detail Explanation for display Thermostat on time until error stops 0 to 999 0 to 999 When it is 100 minutes or more hundreds digit tens digit and ones digit are displayed by turns Example When 415 minutes 0 5 secs Minute 0 5 secs 2 secs 4 gt 15 1 Target rotation of outdoor fan motor 0 to 999 Sub cool Heating mode 0 to 130
6. Outdoor pipe temperature 2 phase 39 to 88 TH6 When the temperature is 0C or less and 39 to 88 temperature are displayed by turns Outdoor temperature TH7 39 to 88 39 to 88 When the temperature is 0 or less and temperature are displayed by turns Outdoor heatsink temperature TH8 40 to 200 40 to 200 When the temperature is 0 or less and temperature are displayed by turns When the thermistor detects 100 C or more hundreds digit tens digit and ones digit are displayed by turns Discharge superheat SHd 0 to 255 0 to 255 When the temperature is 100 or more hundreds digit tens digit and ones digit are displayed by turns Sub cool SC cooling mode 0 to 130 0 to 130 When the temperature is 100 or more hundreds digit tens digit and ones digit are displayed by turns Input current of outdoor unit 0 to 500 When it is 100 or more hundreds digit tens digit and ones digit are displayed by turns High pressure 63HS 0 to 500 When it is 100 or more hundreds digit tens digit and ones digit are displayed by turns 0 to 4 9MPa Targeted operation frequency 0 to 255 0 to 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns DC bus voltage 180 to 370 V model 180 to 370 When it is 100V or more
7. 56 UL 10 WIRING SPECIFICATIONS 58 11 SYSTEM CONTROL mmn 59 12 REFRIGERANT PIPING TASK 61 2o09 1 _ 13 DISASSEMBLY PROCEDURE 64 MN lt lt indication OUTDOOR UNIT INDOOR UNITS COMBINATION SHEETS PARTS CATALOG OCB480 1 1 ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal all supply circuit must be disconnected 1 SAFETY PRECAUTION 1 2 CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant RA10A Use new refrigerant pipes Use a vacuum pump with a reverse flow check valve Make sure that the inside and outside of refrige rant piping is clean and it has no contaminants such as sulfur oxides dirt shaving particles etc which are hazard to refrigerant cycle In addition use pipes with specified thickness Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc The following tools are necessary to use R410A refrigerant Tools for R410A Flare tool Size adjustment gauge Gauge manifold Charge hose Store the piping indoors and both ends of the piping sealed
8. n W 5 0 0 1 1 0 0 1 1 A A A S So ool Branch box pipe temperature gas 39 to 88 39 to 88 5 uo When the temperature is or less and temperature are displayed by turns 4 Indoor unit 1 0 Indoor unit 2 1 Indoor unit 3 0 Indoor unit 4 1 0 1 0 1 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 amp Targeted evaporating temperature ETm 39 to 88 Cooling When the temperature is 0 or less and Targeted high pressure Heating temperature are displayed by turns 39 to 88 Indoor room temperature 8 to 39 8 to 39 o amp A Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 S OCH480D 50 The black square m indicates a switch position SW2 setting Display detail Explanation for display Indoor setting temperature 17 to 30 17 to 30 Qo amp A Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8
9. LEDS Thermistor Outdoor 3 4 WHT 7 wey oo ACLI ACL4 Reactor Holt TRANS 33113 n 5 5 2 a 2 Bz e RS Rush Current Protect Resistor 7 BE 1 2 Capacitor F2 z Power Circuit Board CNAG x E x TB UNW Connection Terminal lt U V W Phase gt TB L1 L2 L3 Connection Terminal lt L1 L2 L3 Power Supply TB P2 Connection Terminal TB C1 Connection Terminal TB N1 Connection Terminal E SMi IGBT Power Module X52A 52C Relay N F Noise Filter Circuit Boar
10. PAC 493PI 46 35 9 52 46 35 49 52 Fig 7 1 3 4 inch PAC SG76RJ E 9 52 gt 15 88 9 52 915 88 Y shape connection pipe for 100 type indoor unit optional parts Fig 7 2 Model rame Connected pipe diameter Diameter A Diameter B mm mm mm EH EH 06 35 99 52 06 35 09 52 52 09 52 gt 915 88 99 52 015 88 Fig 7 2 OCH480D 21 8 TROUBLESHOOTING 8 1 TROUBLESHOOTING Check code display by self diagnosis and actions to be taken for service summary Present and past check codes are logged and displayed on the wired remote controller and control board of outdoor unit Actions to be taken for service which depends on whether or not the trouble is reoccurring at service are summarized in the table below Check the contents below before investigating details Unit conditions at service Check code Actions to be taken for service summary Displaved Judge what is wrong and take a corrective action according idol to 8 3 SELF DIAGNOSIS ACTION TABLE The trouble is reoccurring Conduct trouble shooting and ascertain the cause of the Not displayed trouble according to 8 4 TROUBLESHOOTING OF PROBLEMS Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise etc Re check the symptom and check the installati
11. A ROOM SH lt boxes directly to the units no intermediate connections A A S3 _ 4 S Intermediate connections can lead to communication D Q u 2 9 errors in cords or wires and causes insufficient insu pU al her 120 fep B ROOM lation to ground or a poor electrical contact at the inter Dee 62 amp mediate connection point St S n S gt If an intermediate connection is necessary be sure to E LOS take measures to prevent water from entering cords ER up Em C ROOM and wires OP NM TERM RN REINES TUNE 1 i TT DHHS mFor140 160Y Ot Outdoor unit ir D SS e Dn e D ROOM A alo IMPORTANT D Make sure that the current leakage breaker is one mE E Room with higher harmonics D SD Circuit D C 14 LI tem Always use a current leakage breaker is breaker p amp 3 32 H 83 compatible with higher harmonics as this unit is EAE a equipped with an inverter d BL gt TB3A i The use of an inadequate breaker can cause the ep F ROOM gt lt gt incorrect operation of inverter SH HSS OHS Tp2 Lono G ROOM 62 SD eHe EE TB3C Sep 2h H ROOM ELE 1 li Fig 9 1 ranch box 2 a 3 branch type OCH480D 56
12. TAB connecter on X52A Connect to the RS resistor OCH480D TB P2 Connect to the smoothing capacitor 1 18 17 6090099 2 TB U TB V TB W Connect to the compressor MC Voltage among phases 10V 400V AC z vha 5 m m TB L2 TB L3 Connect to the outdoor converter circuit board L1 OU L2 OU L3 OU 140 160VA Connect to the outdoor noise filter circuit board LO1 LO2 LO3 140 160YA 380V 415V AC Hi 55 ez vz loo ome 1 Connect to the smoothing capacitor CB2 CK capacitor CK capacitor only for 140 160VA TB C1 Connect to the smoothing capacitor CB10O 2 POWER MODULE 8 7 4 Outdoor converter circuit board MXZ 8B140YA MXZ 8B160YA L1 IN N IN L1 A1 Connect to the noise filter Connect to the ACL1 Connect to the CK capacitor circuit board LO1 No E i wes i dl ED 080 i SDSD Ji i b Tin 20 DLE LL 7350 RIS 122 oO j E ez Vw O mo Se Hi M eos WC t i n a 7 Connect to the outdoor power circuit board CN7 JAN caution gt 5 F62 F53 T 9 pw
13. Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 o o 2j 2o oj a 3z A A S So ooo Code of the difference between room temperature and set temperature ATj 0 to 99 m Tens digit of code current ATj m Units digit of code ATj a minute ago Code of the difference between room temperature and set temperature Atj Cooling Heating E Atj room temp Set temp Atj 0 5 1 0 lt Atj 0 5 0 5 lt Atj 0 5 Set temp room temp 0 5 0 5 lt Atj 0 0 0 0 lt At 0 5 0 0 lt Atj 0 0 0 5 lt Atj 1 0 0 5 lt Atj 0 5 1 0 lt 1 5 1 0 lt Atj S 1 0 1 5 lt Nj 2 0 1 5 lt Mj 0 5 2 0 lt Aj S 2 5 2 0 lt At 2 0 2 5 lt 3 0 2 5 lt Atj S 2 5 3 0 lt Atj 3 5 Code display A G I rm O 3 0 lt Atj 3 0 3 5 lt Atj SW setting 1 to 4 5 6 000 100 010 110 001 Target unit Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 101 Indoor unit 6 011 Indoor unit 7 111 Indoor unit 8 Description Display Normal 00 Overvoltage error 01 Undervoltage error 02 L1 phase interruption error 04 Abnormal power synchronous signal 08 Code PFC IG
14. N N 91 95 93 95 94 95 95 95 96 95 96 95 97 95 98 95 97 94 96 94 96 93 95 92 94 92 93 91 91 92 90 91 89 91 89 90 88 89 88 89 87 15500 18000 575 566 88 87 15500 18000 571 563 88 86 15500 18000 567 559 87 86 15500 18000 563 556 86 85 15500 18000 559 553 86 85 15500 18000 555 550 85 84 85 84 84 83 83 83 83 82 82 82 82 81 81 81 81 81 80 80 80 80 79 79 79 79 78 78 78 78 77 78 77 77 76 77 z6 76 76 76 75 76 _75 75 74 75 74 74 73 74 73 74 72 73 72 73 N 0 0 0 0 0 0 lt 0 0 i 0 0 0 0 8 9 0 a s L 72 N a 8 8 2 18 18 1 4 3 5 6 7 8 9 1 3 5 1 5 N 1 N 0 0 0 0 0 0 0 0 8 8 8 8 1 191 192 193 194 195 196 197 198 0 0 0 0 7 7 7 7 7 7 7 7 7 7 7 T 7 7 7 7 7 f 7 8 7 8 8 9 1 9 1 9 2 9 3 9 2 9 2 9 1 8 8 8 7 8 7 8 5 8 4 8 4 8 3 8 3 8 2 8 1 8 1 7 9 7 9 7 8 7 8 7 7 7 7 7 6 7 6 7 5
15. 14000 16000 428 424 66 65 62 62 60 14000 16000 424 420 65 64 62 61 60 59 5 8 14000 16000 414 412 64 63 60 60 58 58 14000 16000 410 409 63 63 60 60 58 57 5 7 5 6 5 6 14000 16000 393 394 60 60 57 57 55 55 14000 16000 389 391 60 60 57 57 55 55 54 54 5 3 5 3 5 3 5 2 5 2 5 1 5 1 9 12 MXZ 8B160YA Before calculating the sum of total capacity of indoor units please convert the value into the kW model capacity following the formula on 4 1 2 Method of obtaining the heating and cooling capacity of an indoor unit Total capacity of Capacity W PR ER Current A 380V Curren Ay400V Current A 415V indoor unit Cooling Heating Heating Cooling Cooling Heating Heating 1700 0 58 1900 0 65 2000 2100 072 gt N X N gt gt N gt gt 2200 0 76 2300 0 79 2400 0 82 2600 0 89 2700 0 93 2800 2900 1 00 3000 1 03 3100 1 06 3300 1 13 3400 1 17 3500 1 20 3600 1 24 3700 1 27 gt _ 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3800 1 31 3900 1 34 4100 141 4200 1 44 4300 1 48 4400 1 51 4500 1 55 4600 1 58 1 1 N 1 0 1 1 1 1 1 2 1 3 1 3 1 3 1 4 1 4 1 5 8 9 2 0 2 1 2 1 2 2 2 2 2 3 2 4 2 4 2 5 2 5 6 7 7 8 8 9 9 0 0 1
16. 63H HighiPressure Switch MF2 Tyr O2 pat ae 63L Low Pressure Switch 14 7 WHT RED 1 TNM S 2 63HS High Pressure Sensor Eg 63 WHT 5 SV1 SV2 Solenoid Valve lt Bypass Valve gt YLW TH3 Thermistor Outdoor Pipe LED3 TH4 Thermistor lt Compressor gt 3 4 WHT 7 12 1 3 823 TH6 Thermistor Outdoor 2 Phase Pipe TRANS 3993333 9 HH oo Thermistor Outdoor 2 3 Zzale DCL Reactor PNK if CB Main Smoothing Capacitor 7 5 CY1 CY2 Capacitor F2 OUS F3 g 8 B S P Power Circuit Board CNS U V W Connection Terminal U V W Phase WHT T E LI NI Connection Terminal lt L Phase a Hi f 1a 1 GRY i loin P2 N2 Connection Terminal CB DCL1 DCL2 Connection Terminal lt DCL gt ISH m ET IGBT Power Module El E2 E3 E4 Connection Terminal Ground 52C 52C Relay Controller Circuit Board SW1 Switch lt Forced Defrost Defect History Record Reset gt sw2 Switch lt Self Diagnosis Switch gt Sw4 Switch lt Test Operation gt SW5 Switch Function Switch SW6 Switch lt Model Select gt SW7 Switch lt Function Setup gt SW8 Switch Function Setup 5 9 Switch Function Setup CN31 Connector CN51 Connector Connection for Option SS Connector Connection for Option CN3S Connector Connection for Option CNIT Connector Connection for Option CN
17. 15 10 5 0 5 10 15 15 10 10 15 Outdoor intake air wet bulb temperature C W B Outdoor MA air wet bulb CW B Note These diagrams show the case where the operation frequency of a compressor is fixed OCH480D 14 4 2 2 Correcting Capacity for Changes the Length of Refrigerant Piping To obtain the ratio and the corrected piping length of the outdoor units rated capacity and the total in use indoor capacity first find the capacity ratio corresponding to the standard piping leng Fig 4 1 4 2 Fig 4 3 4 4 to obtain the actual capacity 1 Capacity correction factor Fig 4 5 Cooling capacity correction curve MXZ 8B140VA MXZ 8B140YA 20 40 60 80 1 00 Se 9 99 Total rated capacity abd of indoor units KW 2 2 15 7 7 0 50 0 85 10 5 75 14 0 100 0 80 18 5 132 075 0 70 0 65 20 40 60 80 Corrected piping length m Fig 4 6 Heating capacity correction curve MXZ 8B140VA MXZ 8B140YA MXZ 8B160VA MXZ 8B160YA th from Fig 4 5 Fig 4 6 and then multiply by the capacity from MXZ 8B160VA MXZ 8B160YA 20 40 60 80 1 00 0 95 Total rated capacity gt of indoor units kW 090 2 5 1696 7 8 50 0 85 9 11 6 7596 S 0 80 Q v 15 5 10096 20 2 130 0 75 0 70 0 65 20 40 60 80 Corrected piping len
18. 96 97 98 100 6 5 N D D h D w o o 1 61 1 65 1 68 1 72 1 75 1 82 1 86 1 89 1 92 1 96 2 00 2 03 2 10 2 14 2 18 2 21 2 25 2 29 2 32 2 40 2 43 2 47 2 51 2 54 2 58 11 8 2 62 10 0 12 0 2 69 12 4 2 73 12 5 2 77 12 7 2 81 12 9 2 84 13 0 2 88 13 2 2 92 13 4 2 99 13 7 3 03 13 9 3 07 14 1 3 11 14 3 3 15 14 5 3 19 14 6 N N AIALA BR wo WIN ojojo ojo ojojo lt gt lt gt lt gt lt gt o lt gt lt gt lt gt lt gt lt gt lt gt 1 1 1 A d a e A D mi B B a o 2 7 2 8 3 0 3 3 3 5 3 6 3 8 3 9 4 1 4 3 4 6 4 7 4 9 5 1 5 2 5 4 5 8 6 2 6 3 6 5 7 1 7 4 7 6 7 7 7 9 8 4 8 5 8 7 8 8 9 2 9 3 AJN ojo a 10 0 10 1 10 3 10 5 10 7 11 0 11 2 11 3 11 5 11 7 Heating 2 5 2 7 2 9 3 2 3 3 3 5 3 6 3 8 3 9 4 4 4 4 5 4 7 4 8 5 0 5 5 3 5 6 5 8 5 9 6 3 6 5 7 7 2 7 6 7 7 8 2 8 3 8 4 8 8 9 2 9 4 9 7 COIN 10 1 10 2 10 4 10 6 10 7 10 9 11 0 11 3 11 5 11 7 11 8 12 0 12 1 12 3 12 6 12 8 12 9 13 1 13 3 13 4 AJOJN 3 5 3 7 3 8 4 0 4 2 4 3 4 5 4 6 4 7 4 9 5 0 5 1 5 3 5 4 5 5 5 6 5 8 5 8 6 1 6 2 6 3 6 5 6 7 7 0 7 2 7 2 7 3 7 4 7 6 7 7 7 9 8 1 8 3 8 4 8 5 8 7 8 8 9 1 9 3
19. All remote controllers are set as sub remote controller In this case E4 is displayed at outdoor LED and EO is dis played at remote controller E3 No display Remote controller communication error Transmitting error 1 Abnormal if sub remote controller could not find blank of transmission path for 6 seconds 2 Abnormal if remote controller could not finish transmitting 30 times continuously Defective communication circuit of remote controller Noise has entered into trans mission line of remote controller Two remote controllers are set as main In case of 2 remote controllers 0 9 Diagnose remote controller Take actions as follows according to diagnosis result a When RC is displayed remote controllers have no problem Turn the power off and on again to check If PLEASE WAIT or HO is displayed for 4 minutes or more replace indoor controller board b When RC NG is displayed replace remote controller When RC or ERC 00 66 is dis played noise may be causing abnor mality Set a remote controller to main and the other to sub Note The descriptions above are for and Indoor branch box branch box outdoor unit communication error Signal receiving error Branch box outdoor unit Abnormal if branch box outdoor controller circuit board could not receive anything normally for 3 minutes Contact fa
20. OCH480D 66 OPERATING PROCEDURE PHOTOS 11 Removing the high pressure switch 63H and low pres Photo 10 sure switch 63L 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 High pressure switch 63H Low pressure switch 63L 3 Remove the electrical parts box See Photo 5 4 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 5 Pull out the lead wire of high pressure switch and low pressure switch 6 Recover refrigerant 7 Remove the welded part of high pressure switch and low pressure switch Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel Note 3 When installing the high pressure switch and low pressure switch cover them with a wet cloth to pre vent them from heating 100 or more then braze the pipes so that the inside of pipes are not oxidized High pressure sensor 63HS 12 Removing the high pressure sensor 63HS 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 5 4 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 5 Pull out the lead wire of high pressure sensor 6 Recover refrigerant 7 Remove the welded part of high pressure sensor Note 1 R
21. 4300 1 47 1 49 60 1 51 10 1 53 4800 1 55 1 57 40 1 59 50 1 61 6 1 63 7 1 65 1 66 900 1 68 500 1 70 5100 1 73 5200 1 76 530 1 79 540 1 82 550 1 85 560 1 88 570 1 91 580 1 94 590 1 97 600 2 00 6100 2 03 6200 2 06 6300 2 08 640 2 11 650 2 14 660 2 17 670 2 20 680 2 23 690 2 26 700 2 29 7100 2 31 7200 2 34 730 2 37 740 2 40 750 2 43 760 2 45 770 2 48 780 2 51 7900 2 54 indoor unit Heating 0 58 0 62 0 65 0 72 0 76 0 79 0 82 0 86 0 89 0 93 1 00 1 03 1 06 1 10 1 13 3 7 3 9 4 0 4 2 4 4 4 5 4 7 4 8 5 0 5 5 2 5 4 5 5 5 6 5 8 1 17 5 9 6 6 2 6 3 6 5 6 7 6 7 7 0 T 7 2 7 3 7 4 7 5 7 6 7 6 7 7 7 8 7 9 8 8 2 8 4 8 5 8 8 9 2 9 3 9 5 9 7 Heating Cooling Heating Cooling Heating 2 4 2 6 2 7 3 0 3 2 15 3 5 N N o 3 7 3 9 4 2 4 3 4 5 4 6 4 8 4 9 N N INIo AA 1 20 oa N 1 27 5 3 5 5 5 6 5 8 Co 1 31 1 34 oa 1 37 Oo 1 41 NX 1 44 6 1 1 48 e 1 55 37 39 40 42 44 45 47 48 50 51 52 54 55 56 58 59 60 61 62 63 65 66 67 67 68 158 69 70 71 72 73 74 75 76 76 mu 78 79 81 82 84 85 86 88 89 90 92 93 95
22. Check the drain sensor leadwire mounted Check the filter clogging If the above mentioned checkpoints has any problem replace the indoor controller board Check whether the indoor linear expansion valve leaks or not 8 4 TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure Remote controller display operates normally and the unit performs cool ing operation however the capacity cannot be fully obtained The air does not cool well O Refrigerant shortage Filter clogging Heat exchanger clogging Air duct short cycle If refrigerant leaks discharging tempera ture rises and LEV opening increases Inspect leakage by checking the tem perature and opening Check pipe connections for gas leakage Open intake grille and check the filter Clean the filter by removing dirt or dust on it If the filter is clogged indoor pipe tem perature rises and discharging pressure increases Check if heat exchanger is clogged by inspecting discharging pres sure Clean the heat exchanger Remove the blockage Remote controller display operates normally and the unit performs heating operation however the capacity cannot be fully obtained Linear expansion valve fault Opening cannot be adjusted well due to linear expan sion valve fault Refrigerant shortage Lack of insulation for refrigerant piping Filter clogging Heat exchanger clogging Air du
23. 0 to 500 Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 2 2 o o 2 2 oovz i S S S 0 to 500 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 pulse 0 5 secs 0 5 secs 1 50 gt n 2 secs Error postponement code history 1 of outdoor unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Code display Operation mode on error occurring OCH480D Operation mode of when operation stops due to error is displayed by setting SW2 like below SW2 ON 48 Code display ss The black square m indicates a switch position SW2 setting Display detail Explanation for display Pipe temperature Liquid TH3 on error 40 to 90 occurring When the coil thermistor detects 0 C or below 40 to 90 and temperature are displayed by turns Example When 15 0 5 secs 0 5 secs 2 secs O 15 gt Compressor temperature TH4 or 3 to 217 discharge temperature TH4 on error When the temperature is 100 C or more the occurring hundreds digit
24. 428 50 66 48 62 46 105 10500 12000 332 432 51 66 48 63 47 61 106 6 1 107 6 2 108 10800 12300 346 441 53 68 50 64 49 62 109 10900 12500 351 448 54 69 51 65 49 63 110 11000 12600 356 451 55 69 52 66 50 63 111 11100 12700 361 454 55 70 53 66 51 64 112 6 4 113 6 5 114 11400 13000 376 463 58 71 55 68 53 65 115 11500 13100 381 466 58 72 56 68 54 65 116 11600 13300 387 473 59 73 56 69 54 117 11700 13400 392 476 60 73 57 69 55 67 118 6 7 119 120 121 12100 13800 4 14 488 64 75 60 71 58 122 123 12300 14100 425 498 65 76 62 73 60 70 124 12400 14200 430 501 66 77 63 73 60 70 125 7 1 126 12600 14400 442 507 68 78 64 74 62 71 127 12700 14500 448 510 69 78 65 74 63 72 128 12800 14600 454 513 70 79 66 75 64 72 129 7 3 130 13000 14900 466 523 72 80 68 76 65 73 131 13100 15000 472 526 72 81 69 77 66 74 132 74 133 13300 15200 484 532 74 82 71 78 68 75 134 13400 15300 491 535 75 82 72 78 69 75 135 7 6 136 7 5 137 7 6 138 7 6 139 7 6 140 7 6 141 7 5 142 14000 16000 519 531 80 81 76 77 73 75 143 14000 16000 519 527 80 81 76 77 73 74
25. 7 5 7 4 7 4 7 3 7 3 7 3 7 2 7 2 7 1 7 1 7 0 7 0 7 0 7 7 7 6 8 4 8 5 8 7 8 8 8 8 8 8 8 7 8 3 7 9 7 9 7 8 7 8 7 7 7 6 7 6 3 3 3 0 0 0 Ti T 199 20 0 6 8 8 8 8 8 7 8 7 8 5 8 5 8 4 8 4 8 3 8 3 8 2 8 1 8 1 8 1 7 9 7 9 7 8 7 8 7 7 7 7 7 7 7 6 7 6 7 5 7 5 7 5 7 4 7 4 7 3 7 3 7 3 7 2 7 2 7 1 7 1 7 1 7 0 7 0 6 0 3 7 8 9 0 D N 7 7 7 7 7 5 5 3 2 2 2 8 8 7 7 6 6 5 5 5 4 4 3 3 3 2 2 2 0 0 7 201 2 9 5 9 5 9 5 9 5 9 5 9 5 9 5 9 5 9 4 9 4 9 3 9 2 9 2 9 1 9 1 8 8 8 8 8 7 8 7 8 5 8 5 8 4 8 4 8 3 8 3 8 2 8 2 8 1 8 1 8 1 7 9 7 9 7 8 7 8 7 8 7 7 7 7 7 6 7 6 7 6 7 5 7 5 7 4 7 4 7 4 7 3 7 3 3 9 1 9 3 9 4 9 5 9 7 9 7 9 5 9 4 9 3 9 3 9 2 9 1 9 1 8 8 8 8 8 7 8 5 8 5 8 4 8 3 8 3 8 2 8 2 8 1 8 1 7 9 7 9 7 8 7 8 7 7 7 7 7 6 7 6 7 6 7 5 7 5 7 4 7 4 7 3 7 3 7 2 7 2 2 2 69 69 70 66 69 69 66 68 69 66 D N 12 12
26. Abnormal if input current exceeds 38 A or 34A continuously 10 seconds Current sen Sor on noise filter board detects input current Disconnection of compressor wiring Defective circuit of current sensor on outdoor power circuit board Decrease of power supply voltage Correct the wiring U V W phase to compressor Refer to 8 7 TEST POINT DIAGRAM Replace outdoor power circuit board Check the facility of power supply Low pressure 63L operated Abnormal if 63L is operated under 0 03MPa during compressor operation 63L Low pressure switch OCH480D Stop valve of outdoor unit is closed during operation Disconnection or loose connection of connector 63L on outdoor con troller board Disconnection or loose connection of 63L Defective outdoor controller board Leakage or shortage of refrigerant Malfunction of linear expansion valve Check stop valve Turn the power off and on again to check if F3 is displayed on restart ing If F3 is displayed follow the F3 pro cessing direction Correct to proper amount of refrigerant amp Check linear expansion valve Refer to 8 6 HOW TO CHECK THE PARTS 32 Abnormal point and detection method Case Judgment and action Compressor overcurrent interruption Abnormal if overcurrent DC bus or com pressor is detected after compressor starts operating for 30 seconds Stop valve of out
27. Outdoor temperature Thermistor TH6 temperature condenser L l Thermistor TH3 Ball valve KA Pipe temperature liquid I Thermistor een Distributor i ow Pressure Gas pipe temperature with Strainer LEV A E Strainer expansion valve 100 Strainer Thermistor 4 i 100 Compressor temperature L Thermistor TH8 Zi 1 Fin temperature o cog CR a lt Strainer Compressor 100 i Service port ai er MIRA icy agile 100 E Remora tw heata TH2 or RT13 tube4 ndoor units 4 Branch box__ SSC Outdoor unit unit mm Capillary tube 1 Capillary tube 2 Capillary tube 3 Capillary tube 4 For return of oil For SV2 ahead of LEV behind LEV from oil separator in cooling mode in cooling mode MXZ 8B140VA Outdoor unit 2 8 160 2 5 40 8 x L1000 4 X 2 4 x L250 MXZ 8B160YA B lis PAC AK53BC IPh 4 x 2 4 x L140 x 5 4 x 2 2 x L130 x 5 ranch box PAC AK32BC 44 x 2 4 x L140 x 3 4 92 2 x L130 x 3 Piping connection size B The pipe connection size differs according to the type and capacity of indoor units Match the piping connection size of branch box with indoor unit If the piping connection size of branch box does not match the piping connection size Gas mm
28. Power Consumption Total capacity of Capacity W KW Current A 220V Current A 230V Current A 240V Heating 214 213 21 1 20 9 20 6 153 20 4 154 20 2 155 19 9 156 19 7 157 19 5 158 19 4 159 19 1 160 18 9 161 18 8 162 18 6 163 18 4 164 18 2 165 18 0 166 17 8 167 17 7 168 17 5 169 17 3 170 17 2 171 17 0 172 16 9 173 16 8 174 16 6 175 16 5 176 16 3 177 16 2 178 16 0 179 15 9 180 15 7 181 15 6 182 15 5 183 15 4 184 15 2 indoor unit 3 12 MXZ 8B160VA Before calculating the sum of total capacity of indoor units please convert the value into the kW model capacity following the formula on 4 1 2 Method of obtaining the heating and cooling capacity of an indoor unit Total capacity of Capacity W i 3 Current Ay 220V Current Ay230V Current A 240V indoor unit Cooling Heating Heating Cooling Heating Cooling Heating Cooling Heating 1700 0 58 1900 0 65 2000 N 2 gt gt N N 2100 0 72 2200 0 76 2300 0 79 2400 0 82 2600 0 89 2700 0 93 2800 N 4 4 4 4 4 4 4 2900 1 00 3000 1 03 3100 1 06 3300 1 13 3400 1 17 3500 1 20 3600 1 24 2 2 4 4 4 4 4 4 4 4 4 4 4 4 4 2 2 2 4 2 4 2 4 2 4 2 4 2 4 3 lt e D w 3700 1 27 3800 1 31 3900 1 34 4100 1 41 4200 1 44 4300 1 48 4400 1 51 4500 1 55 e D o D D gt 3 3 3 3 3 3 3 3 4 4600 1 58 4800 165 4900 1
29. on the outdoor controller circuit board Check breaking of the lead wire for thermistor TH4 Refer to 8 6 HOW TO CHECK THE PARTS Check resistance value of thermistor TH4 or temperature by microprocessor Thermistor TH4 Refer to 8 6 HOW TO CHECK THE PARTS SW2 on A Control Service Tool Refer to 8 8 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 3 Replace outdoor controller board Abnormal point and detection method Case Judgment and action 1 Open short circuit in the outdoor unit thermistors TH3 TH7 and TH8 and branch box s thermistors TH A E Abnormal if open or short circuit is detected while the compressor is operating Open detection of thermistors TH3 is inop erative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting Note Check which unit has abnormality in its thermis tor by switching the mode of SW2 Refer to 8 8 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS Open short circuit in the branch box thermistor TH A TH E Thermistors One or more connectors on outdoor controller circuit board TH3 TH7 and TH8 and branch box controller board TH A E have contact failure or discon nection G Defective thermistor Outdoor controller circuit board is defective Symbol Name Open detection Check the connector s contact and the electric wires of thermistor GCheck the resistance value of the
30. tens digit and ones digit are 3 to 217 displayed by turns Example When 15 0 5 secs 0 5 secs 2 secs 1 gt 30 Compressor operating current on error occurring 0 to 50 Check code history 1 latest When no check code history Alternate display of abnormal unit 0 and are displayed by turns number and code Code display Check code history 2 When no check code history Alternate display of error unit number 0 and are displayed by turns and code Code display Thermostat ON time 0 to 999 0 to 999 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Example Minute When 245 minutes 0 5 secs 0 5 secs 2 secs 2 45 gt Test run elapsed time 0 to 120 0 to 120 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Example Minute When 105 minutes 0 5 secs 0 5 secs 2 secs 1 gt 05 gt 1 Capacity code of indoor unit Qj The capacity code of indoor unit is displayed Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 Code display gt eo e S oS o gt o o
31. 144 14000 16000 520 523 80 80 76 76 73 73 145 14000 16000 520 519 80 80 76 76 73 73 146 14000 16000 5 21 516 80 79 76 75 73 73 147 14000 16000 521 512 80 79 76 75 73 72 Current A 380V Current A 400V Current A 415V 8 12 2 8 140 Total capacity of indoor unit Power Consumption KW Capacity W Current A 380V Current A 400V Current A 415V 148 14000 16000 522 509 80 r8 76 74 73 72 149 14000 16000 522 505 80 78 76 74 73 71 150 14000 16000 522 501 80 77 76 73 73 70 7 0 152 153 154 155 156 157 158 159 161 162 163 164 165 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 6 7 14000 16000 489 474 75 73 71 69 69 67 14000 16000 482 469 74 72 70 68 68 66 14000 16000 476 464 73 71 69 68 67 65 14000 16000 471 460 72 71 69 67 66 65 14000 16000 465 455 71 70 68 66 65 64 14000 16000 459 450 70 69 67 66 65 63 14000 16000 454 446 70 68 66 65 64 63 14000 16000 449 441 69 68 65 64 63 62 14000 16000 443 437 68 67 65 64 62 61 14000 16000 438 433 67 66 64 63 62 61 14000 16000 433 428 66 66 63 62 61
32. 2 2 3 5 6 6 7 8 8 9 9 0 0 1 2 5 6 4800 1 65 4900 1 68 5000 1 72 5100 1 75 5200 1 79 5300 1 82 5500 1 89 5600 1 92 2 2 2 2 2 2 5700 1 96 5800 1 99 5900 2 03 6000 2 07 6200 2 14 6300 2 17 6400 2 21 6500 2 25 6600 2 28 6700 2 32 6900 2 39 7000 2 43 7100 2 47 7200 2 50 3 3 3 3 3 3 w ays 1 1 1 2 1 2 1 3 1 3 1 4 1 4 1 5 1 5 1 6 1 6 1 6 1 7 1 7 1 8 1 8 1 8 1 9 1 9 1 9 2 0 2 0 2 0 2 1 2 1 2 1 2 2 2 2 2 2 2 2 2 3 2 3 2 3 2 3 2 4 2 4 2 4 2 5 2 5 2 6 2 6 2 6 2 7 2 7 2 8 2 8 2 9 2 9 2 9 3 0 3 0 3 0 3 1 3 1 3 2 3 2 3 2 3 3 3 3 3 4 3 4 3 4 3 5 3 5 3 6 7300 2 54 7400 2 58 7500 2 62 7700 2 69 7800 2 73 7900 2 77 8000 2 80 8100 2 84 8200 2 88 8400 2 95 3 3 3 3 3 3 3 3 4 4 4 4 8500 2 99 8600 3 03 8700 3 07 8800 3 11 8900 3 14 9100 3 22 9200 3 26 w 11 12 12 13 13 1 4 1 4 15 15 16 16 16 WCsEFASEI ERAI 18 18 18 19 19 19 20 20 20 21 21 21 22 22 22 22 23 23 2 23 23 24 24 24 25 25 26 26 26 27 27 28 28 29 29 29 30 30 30 31 31 32 32 32 33 33 34 34 34 35 gt gt 1 0 1 0 1 1 1 2 1 2 1 3
33. 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 5 4 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 5 Remove the bypass valve coil fixing screw M4 x 6 6 Remove the solenoid valve coil Bypass valve SV1 by sliding the coil upward 7 Recover refrigerant 8 Remove the welded part of bypass valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel 10 Removing solenoid valve coil Returning oil bypass Bypass valve SV2 and bypass valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 5 4 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 5 Remove the bypass valve coil fixing screw M5 x 6 6 Remove the solenoid valve coil Returning oil bypass Bypass valve SV2 by sliding the coil upward 7 Recover refrigerant 8 Remove the welded part of bypass valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel Photo 9 Solenoid valve coil Bypass valve Returning oil bypass SV2 Solenoid valve coil Bypass valve SV1 Bypass valve SV1 Bypass valve
34. 2nd detection within 30 minutes since the compressor has stopped the compressor stops again and restarts operation in 3 minutes When the sensor detects 4 31MPa or more or over 4 15MPa for 3 minutes again 3rd detection within 30 minutes since the compressor has stopped the compressor stops again and restarts operation in 3 minutes When the sensor detects 4 31MPa or more or over 4 15MPa for 3 minutes again 4th detection within 30 minutes after 3rd compressor stop it stops abnormally In this time lt U1 gt is dis played When the sensor detects 4 31MPa or more or over 4 15MPa for 3 minutes after 30 minutes since the compressor has stopped 1st or 2nd or 3rd time it becomes the 1st detection or the same performance as above mentioned It is being delay for abnormal stop during 30 minutes since the compressor has stopped In this time check delay code lt U1 gt will be displayed OCH480D 1 Short cycle of indoor unit 2 Clogged filter of indoor unit 3 Decreased airflow caused by dirt of indoor fan Dirt of indoor heat exchanger Locked indoor fan motor Malfunction of indoor fan motor Defective operation of stop valve Not fully opened 8 Clogged or broken pipe 9 Locked outdoor fan motor 10 Malfunction of outdoor fan motor 11 Short cycle of outdoor unit 12 Dirt of outdoor heat exchang er 13 Decreased airflow caused by defective inspection of out side temperature therm
35. 4 4 4 4 4 4 2 2 2 2 2 3 3 3 2 3 3 3 3 4 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 7 3 3 3 3 3 3 3 3 3 4 2 4 4 4 4 4 w AB wo 0 1 3 3 5 5 5 6 6 7 7 9 9 0 0 1 1 3 3 3 5 6 7 7 8 8 9 9 0 1 1 3 3 5 5 6 7 7 8 8 9 0 0 1 1 3 5 5 6 4 4 4 15 9 0 2 3 4 5 6 7 8 9 0 2 3 4 5 6 7 8 9 0 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 7 0 2 3 4 5 6 7 8 9 12 09 12 13 13 14 1 5 15 1 6 1 6 17 17 17 1 8 1 8 1 9 1 9 2 0 2 0 2 0 2 1 2 1 22 22 22 23 23 23 23 24 24 24 25 25 25 25 26 26 27 2 7 2 7 2 8 2 8 2 9 2 9 3 0 3 0 3 1 3 1 3 2 3 2 3 2 3 3 3 3 3 4 3 4 3 5 3 5 3 5 3 6 3 6 3 7 3 7 3 8 3 8 3 9 3 9 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 T 7 7 7 7 7 7 7 7 7112 2 8 140 Total capacity of Capacity W indoor unit Power Consumption KW 80 8000 9100 266 322 39 49 37 47 36 45 47 84 4 8 85 4 8 4 9 87 5 0 88 5 1 5 1 5 2 5 2 5 3 5 4 5 4 9500 10900 296 392 45 60 43 57 42 55 5 6 5 6 5 7 5 7 100 10000 11400 309 412 47 63 45 60 43 58 101 5 8 102 5 9 103 104 10400 11900 327
36. 6 127 21 8 128 22 1 129 22 2 130 22 3 131 224 132 22 6 133 22 7 134 22 9 135 23 1 136 23 2 137 23 3 138 23 4 139 23 6 140 23 7 141 26 2 142 26 2 143 26 1 144 26 1 145 26 1 26 0 5 12 MXZ 8B160VA Total capacity of indoor unit Power Consumption KW Capacity W Current A 220V Current A 230V Current A 240V 25 9 152 153 154 155 156 157 158 159 161 162 163 164 165 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 187 188 189 191 192 193 194 195 196 197 198 199 200 25 9 25 9 25 9 26 0 25 8 25 7 15500 18000 623 606 286 278 274 266 262 255 25 3 25 2 15500 18000 6 09 594 280 273 267 261 256 250 6 05 24 9 15500 18000 6 00 587 275 270 264 258 253 247 24 5 24 4 24 2 24 1 23 9 23 8 23 7 23 5 23 4 23 3 23 1 23 0 22 9 22 7 22 6 22 5 22 3 22 2 22 1 22 0 21 9 21 8 21 6 21 5 214 21 3 212 21 1 210 20 8 20 7 20 6 20 5 20 4 20 3 20 2 20 1 20 0 202 6 12 2 8 140 Before calculating the sum of total capacity of indoor units please convert the value into the KW model capacity following the formula on 4 1 2 Method of obtaining the heating and cooling capacity of an indoor unit Total capacity of Capacity w Power Current A 380V Current AJ400V Current Ay 415V indoor unit Cooling Heating Cooling Heating
37. 7 11 8 11 3 12 0 11 5 122 11 7 12 3 11 8 12 5 12 0 12 6 12 1 13 0 12 4 13 1 10 0 12 6 13 3 12 8 13 5 12 9 13 7 13 1 13 8 13 2 14 1 13 6 14 3 13 7 3 5 3 7 3 8 0 2 3 5 6 7 9 5 0 5 1 5 3 5 4 5 5 5 6 5 8 5 8 6 1 6 2 6 3 6 4 6 5 6 7 7 0 7 1 7 2 7 2 7 3 7 5 7 6 7 7 7 9 8 1 8 3 8 4 8 5 8 7 8 8 9 1 9 3 9 4 9 5 9 7 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 7 10 5 10 1 10 6 10 1 10 7 10 3 10 9 10 4 11 0 10 5 11 2 10 7 11 2 10 8 11 4 10 9 11 5 11 0 11 7 11 2 3 4 3 5 3 7 3 8 0 3 A 5 T 8 9 5 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 6 2 6 3 6 4 6 4 6 5 6 7 7 0 7 2 7 3 7 4 7 5 7 7 7 8 8 2 8 3 8 4 8 5 8 7 8 8 9 9 3 9 4 9 5 9 7 8400 2 95 8500 2 99 8600 3 03 8700 3 07 8800 3 11 8900 3 14 9100 3 22 9200 3 26 1 1 1 1 7 7 7 7 7 7 7 7 4112 MXZ 8B160VA Power Consumption Total capacity of Capacity W kW Current A 220V Current A 230V Current A 240V indoor unit 580 8000 930 296 330 118 152 112 145 108 139 14 4 84 14 7 85 14 9 15 0 87 15 2 88 15 3 15 5 15 8 16 0 16 2 16 3 16 5 16 7 16 8 17 2 17 3 17 5 100 17 6 101 17 8 102 17 9 103 18 2 104 18 4 105 18 5 106 18 6 107 18 7 108 18 9 109 19 1 110 19 3 111 19 4 112 19 5 113 19 7 114 19 8 115 20 1 116 20 2 117 20 3 118 20 5 119 20 6 120 20 7 121 21 0 122 21 1 123 21 3 124 214 125 21 5 126 21
38. 78 66 75 132 7 5 133 13300 15400 484 539 74 83 71 79 68 76 134 13400 15600 491 545 75 84 72 79 69 77 135 13500 15700 497 548 76 84 72 80 70 77 136 13600 15800 503 551 77 85 73 80 71 77 137 7 8 138 7 8 139 13900 16100 523 56 80 86 76 82 73 79 140 7 9 141 14100 18000 540 623 83 96 79 91 76 88 142 14200 18000 548 622 84 95 80 91 77 87 143 87 144 14400 18000 563 620 86 95 82 90 79 87 145 14500 18000 571 619 88 95 83 90 80 87 146 14600 18000 579 618 89 95 84 90 81 87 147 14700 18000 588 618 90 95 86 90 83 87 Current A 380V Current A 400V Current A 415V 11 12 MXZ 8B160YA Total capacity of Capacity W indoor unit Power Consumption KW Heating 148 149 150 151 15 15300 Current A 380V Current A 400V Current A 415V N 8 8 8 8 8 1 15300 15500 18000 623 606 0 0 0 0 2 5 154 15 15 1 N N I h 1 4 5 5 88 15 87 86 6 6 09 86 6 85 2 A 16 16 16 15500 18000 600 587 0 0 84 8 8 8 8 4 8 8 0 0 0 0 N 167 168 169 170 171 172 173 174 175 176 177 17 17 18 1
39. 8B140YA 160YA 0 1880 0 3020 Open or short Measure the resistance between the terminals with a tester s u At the ambient temperature 20 C SV1 Normal Abnormal 1327 100 Open or short i ij Measure the resistance between the terminals with a tester At the ambient temperature 20 SV2 Normal Abnormal MXZ 8B140VA 160VA MXZ 8B140YA 160YA Open or short 1450 x 1500 OCH480D 37 Check method of fan motor fan motor outdoor controller circuit board Notes High voltage is applied to the connecter CNF 1 2 for the fan motor Pay attention to the service Do not pull out the connector CNF1 2 for the motor with the power supply on It causes trouble of the outdoor controller circuit board and fan motor Self check Symptom The outdoor fan cannot turn around Fuse check Check the fuse F5 on outdoor controller board Did the fuse blow gt Yes gt 1 V No Wiring contact check Contact of fan motor connector CNF1 2 Replace outdoor controller board C B and fan motor MF 1 2 Is there contact failure gt Yes gt J Power supply check Remove connector 2 Measure the voltage in the outdoor controller circuit board TEST POINT Voc between 1 and 4 of the fan connector Voc DC250 330V TEST POINT V
40. 9 4 9 5 9 7 NX 10 1 10 1 10 3 10 4 10 0 10 5 10 1 10 7 10 2 10 8 10 3 10 9 10 4 11 0 10 6 11 2 10 7 3 4 3 5 3 7 3 8 4 0 4 1 4 3 4 4 4 5 4 8 4 9 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 1 6 2 6 3 6 4 6 5 6 7 7 0 7 1 7 2 7 3 7 4 7 5 7 7 7 8 7 9 8 2 8 3 8 4 8 5 8 7 8 8 9 1 9 3 9 4 9 5 9 7 N 1 1 1 1 N 79 ojojo LININ lm lol ISl co 15 22 23 24 2 29 3 I 43 6 65 6 68 69 72 7 yd 73 o a 1 12 MXZ 8B140VA Power Consumption Total capacity of Capacity W KW Current A 220V Current A 230V Current A 240V Heating 80 _ 8000 9100 256 322 118 148 112 141 108 136 13 9 14 1 142 144 14 5 14 7 7 14 9 8 15 2 15 4 15 5 15 7 15 9 16 0 16 2 16 5 16 7 16 8 17 0 17 2 100 173 101 17 5 102 17 8 103 17 9 104 18 0 105 18 2 106 18 3 107 18 4 108 18 6 109 18 9 110 19 0 111 19 1 112 19 2 113 19 4 114 19 5 115 19 6 116 19 9 117 20 0 118 20 2 119 20 3 120 20 4 121 20 5 122 20 7 123 210 124 21 1 125 212 126 21 3 127 215 128 21 6 129 21 7 130 22 0 131 22 1 132 22 3 133 22 4 134 225 135 22 6 136 22 6 137 22 7 138 22 7 139 22 7 140 22 6 141 22 5 142 22 3 143 22 2 144 22 0 145 21 8 146 21 7 indoor unit 2 12 MXZ 8B140VA
41. Branch box 1 plus branch box 1 Branch box 2 If 2 5 mm used 55 m Notes 1 Wiring size must comply with the applicable local and national code 2 Power supply cords and Indoor unit Branch box Outdoor unit connecting cords shall not be lighter than polychloro prene sheathed flexible cord Design 60245 IEC 57 3 Install an earth line longer than power cables A Warning There is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn off the main power supply when servicing And do not touch the S1 S2 S3 terminals when the power is energized If isolator should be used between indoor unit branch box and outdoor unit please use 3 pole type lt Example 1 gt In case of 2 branch boxes Branch box 1 A Warning 5 branch type Indoor unit Be sure to connect the power supply cords and con mFor140 160V ________ h LLL necting wires for the indoor units outdoor units branch Outdoor unit Spl
42. Cooling Heating Cooling Heating Cooling Heating 1700 0 80 0 58 1800 0 84 0 62 1900 0 87 0 65 2100 0 91 0 72 2200 0 95 0 76 2300 0 98 0 79 2400 1 02 0 82 2500 1 05 0 86 2600 1 08 0 89 2700 1 11 0 93 2900 1 14 1 00 3000 1 17 1 03 3100 1 20 1 06 3200 1 23 1 10 3300 1 26 1 13 3400 1 28 1 17 3500 1 31 1 20 3700 1 33 1 27 3800 1 36 1 31 3900 1 38 1 34 4000 1 41 1 37 4100 1 43 1 41 4200 1 45 1 44 4300 1 47 1 48 4500 1 49 1 55 4600 1 51 1 58 4700 1 53 1 61 4800 1 55 1 65 4900 1 57 1 68 5000 1 59 1 72 5100 1 61 1 75 5300 1 63 1 82 5400 1 65 1 86 5500 1 66 1 89 5600 1 68 1 92 5700 1 70 1 96 5800 1 73 2 00 5900 1 76 2 03 6100 1 79 2 10 6200 1 82 2 14 6300 1 85 2 18 6400 1 88 2 21 6500 1 91 2 25 6600 1 94 2 29 6700 1 97 2 32 6900 2 00 2 40 7000 2 03 2 43 7100 2 06 247 7200 2 08 2 51 7300 2 11 2 54 7400 2 14 2 58 7500 2 17 2 62 7700 2 20 2 69 7800 2 23 2 73 7900 2 26 2 77 8000 2 29 2 81 8100 2 31 2 84 8200 2 34 2 88 8300 2 37 2 92 8500 2 40 2 99 8600 2 43 3 03 8700 2 45 3 07 8800 2 48 3 11 8900 2 51 3 15 9000 2 54 3 19 A 2 2 2 2 ed 4 gt gt 1 2 2 2 2 2 2 2 2 2 3 1 k COIN 1 1 1 1 1 2 1 2 1 3 1 3 1 4 1 4 1 5 6 1 8 1 9 1 9 2 0 2 0 2 1 2 2 2 2 2 3 2 3 2 4 2 4 2 5 2 6 6 7 8 8 9 0 0 1 1 2 2 3 5 5 6 6 7 8 8 9 9 0 0 1 2 4 4 5 2 3 3 3 3 3 3 3 2 3 4 4 a 4 4 4
43. Indoor unit Note When single refrigeration system consists of several inde pendent refrigeration circuit figure out the total refrigerant amount by each independent refrigerant circuit The smallest The second room smallest room 3 Use the results of calculations 1 and 2 to cal culate the refrigerant concentration Total refrigerant in the refrigerating unit kg 5 Maximum concentration kg m The smallest room in which an indoor unit has been installed m Maximum concentration of R410A 0 44kg m If the calculation results do not exceed the maximum concen tration perform the same calculations for the larger second and third room etc until it has been determined that the maximum concentration does not exceed in each room OCH480D 63 13 MXZ 8B140VA MXZ 8B140YA MXZ 8B160VA DISASSEMBLY PROCEDURE MXZ 8B160YA OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 1 Removing the service panel and top panel 1 Remove 3 service panel fixing screws 5 x 12 and slide the hook on the right downward to remove the service panel 2 Remove screws 3 for front 3 for rear 5 x 12 of the top panel and remove it Top panel fixing screws Photo 1 Top panel 4 Service panel Grille fixing Screws Front panel Grille fixing Screws Service panel fixing screws 2 Removing the fan motor MF1 MF2 1 Remove the service panel See Photo 1 2 Remo
44. Replace outdoor controller circuit board PA 2520 Forced compressor stop Overlap malfunction of drain pump in indoor unit and linear expansion valve in branch box When condition of the outdoor unit is forcefully stopped which means the drain sensor detects continuously to go under water 5 times and also detects liquid pipe temperature suction temperature 10deg for 30 minutes continuously the indoor unit and indoor units in same refrigerant system which operates in cooling heating or dry mode stops abnormally Also the outdoor unit which is connected to that indoor unit with refrigerant system stops abnormally compressor is suspended to operate In this time PA is displayed OCH480D Drain pump trouble Drain defective Drain pump clogging Drain pipe clogging Open circuit of drain sensor side heater 4 Contact failure of drain sensor connector Dew condensation on drain sensor Drain water descends along lead wire Drain water waving due to filter clogging Indoor controller board defective Drain pump drive circuit failure Drain heater output circuit failure Both of above mentioned 0 6 and the linear expansion valve full closed failure happens synchronistically 34 Check the drain pump Please confirm whether water can be drained Confirm the resistance of the drain sensor Side heater Check the connector contact failure
45. at least 12 hours before starting operation Staring operation immediately after turning on the main power switch can result in severe damage to internal parts Keep the power switch turned on during the operational season e The followings must be checked as well The outdoor unit is not faulty LED on the control board of the outdoor unit flashes when the outdoor unit is faulty Both the gas and liquid stop valves are completely open 8 2 2 Test run 1 Using remote controller Refer to the indoor unit installation manual Be sure to perform the test run for each indoor unit Make sure each indoor unit operates properly following the installation manual attached to the unit f you perform the test run for all indoor units at once you cannot detect any erroneous connection if any of the refrigerant pipes and the connecting wires The compressor operation is not available for 3 minutes at least after the power is supplied The compressor can emit noise just after turn on the power supply or in case of low outside air temperature About the restart protective mechanism Once the compressor stops the restart preventive device operates so the compressor will not operate for 3 minutes to protect the air conditioner OCH480D 23 PT 2 Using SW4 in outdoor unit In case of the test run from outdoor unit all indoor units operate Therefore you cannot detect any erroneous con nection of refrigerant pipes and the connect
46. condition and refrigerant amount Check the ball valve is fully opened 1 Check the ball valve is fully opened 2 Check the resistance of discharge tem perature thermistor 3 According to Monitoring function for out door unit set SW2 and check the high pressure sensor level According to Monitoring function for outdoor unit set the SW2 and check the discharge temp thermistor level When the high pressure sensor and dis charge temp thermistor are normal if the above mentioned detecting pressure level and temp are big different from the actual pressure and temp replace the multi control ler board 1 Check the resistance of thermistor 2 According to Monitoring function for out door unit set the SW2 and check the out door pipe temp thermistor level 3 According to Monitoring function for out door unit set the SW2 and check the outer temp thermistor level Open short circuit of compressor temperature thermistor 4 Abnormal if open 3 or less or short 217 C or more is detected during compressor opera tion Detection is inoperative for 10 minutes of compressor starting process and for 10 minutes after and during defrosting OCH480D Disconnection or contact failure of connector TH4 on the out door controller circuit board Defective thermistor Defective outdoor controller circuit board 29 Check connection of connector TH4
47. has stopped 1st time it becomes the 1st detection and same performance as above It is being delay for abnormal stop dur ing 30 minutes since the compressor has stopped In this time check delay code lt U2 gt will be displayed Overheated compressor tion caused by shortage of refrigerant Defective operation of stop valve Defective thermistor Defective outdoor controller board Defective action of linear Gas leakage Gas shortage When heating operation scant refrigerant operation When heating airflow or ther mo OFF are mixed operation it cause a refrigerant shortage operation Ball valve performance failure Not fully opened Error detection of discharge super heat 1 High pressure sensor defec tive 2 Discharge temperature ther mistor defective 3 Thermistor input circuit defective and high pressure sensor defective in multi controller board Error detection of TH7 TH3 1 Thermistor defective 2 Thermistor input circuit defective in multi controller board Check intake superheat Check leakage of refrigerant Charge additional refrigerant Check if stop valve is fully open Turn the power off and check if U3 is dis played when the power is turned on again When U3 is displayed refer to Judgement and action for U3 Check linear expansion valve Refer to 8 6 HOW TO CHECK THE PARTS Check the refrigerant amount Check the operation
48. i i E 5 NOISE i T i O 10 s O 10 poo 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz OCH480D 16 OUTLINES AND DIMENSIONS MXZ 8B140VA MXZ 8B140YA MXZ 8B160VA MXZ 8B160YA unit mm 1 FREE SPACE Around the unit 2 SERVICE SPACE 3 FOUNDATION BOLTS 4 PIPING WIRING DIRECTIONS The diagram below shows a basic example Explanation of particular details are given in the installation manuals etc Dimensions of space needed for service access are shown in the below diagram o re Please secure the unit firmly with 4 foundation M10 bolts Bolts and washers must be purchased locally Piping and wiring connections can be made from 4 directions front right rear and below gt EH 500 Service space Example of Notes Refrigerant GAS pipe connection FLARE 215 88 5 8 inch G Refrigerant LIQUID pipe connection FLARE 9 52 3 8 inch Indication of STOP VALVE connection location Less than Foundation bolt height Side Air Intake Rear Air Intake 175 600 175 T Installation Feet T 2 U Shaped notched holes Founda
49. minutes after the compressor stops the refrigerant collecting operation cannot be performed Wait until compressor has been stopped for 3 minutes and then set the SW4 1 and SW4 2 to ON again Fully close the gas stop valve when the pressure reading on the gauge drops 0 05 0 00 MPa approximately 0 5 0 0 kgf cm Stop the air conditioner operation SW4 1 OFF and SW4 2 OFF Turn off the power supply circuit breaker If too much refrigerant has been added to the air conditioner system the pressure may not drop to 0 5 If this occurs use a refrigerant collecting device to collect all of the refrigerant in the system and then recharge the system with the correct amount of refrigerant after the indoor and outdoor units have been relocated N Warning When pumping down the refrigerant stop the compressor before disconnecting the refrigerant pipes The compressor may burst if air etc get into it OCH480D 62 12 3 PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 12 3 1 Introduction 2 Calculate room volumes m and find the room R410A refrigerant of this air conditioner is non toxic and with the smallest volume non flammable but leaking of large amount from an indoor The part with represents the room with the smallest unit into the room where the unit is installed may be deleteri volume ous a Situation in which there are no partitions To prevent possible injury the rooms should be large Branch box enough t
50. of indoor unit use optional different diameter deformed joints to the branch box side Connect deformed joint directly to the branch box side Liquid mm m In case of using 1 branch box Flare connection employed No brazing Branch box gt m In case of using 2 branch boxes 2 branches pipe joint optional parts A Branch box 1 m installation procedure 2 branch pipe joint Refer to the installation manuals of MSDD 50AR E and MSDD 50BR E 2 OCH480D 20 m Pipe size Branch box Indoor unit M series or S series Indoor unit Indoor unit type 60 6 35 15 88 Pipe size mm When using 60 type indoor unit of MEXZ series use the flare nut in the indoor unit accessory for the gas side connecting of indoor unit Do not use the flare nut gas side attached to the indoor unit If it is used a gas leakage or even a pipe extraction may occur m Pipe size Branch box Indoor unit For P series Indoor unit Indoor unit type kW Pipe size Liquid mm Gas When using 35 50 type indoor unit of P series use the flare nut for R410A attached to the indoor unit Do not use the flare nut for R407C in the indoor unit accessory If it is used a gas leakage or even a pipe
51. trunk looking outdoor unit can successfully realizes a long distance piping for big houses Equipped with a microprocessor the Branch Box can trans late the transmission signal of indoor units to achieve the optimum control 2 2 1 System example SU Indoor unit Wall mounted type Outdoor unit Branch Box 2 2 2 Method for identifying Outdoor unit Number of connectable indoor units MAX Model type M XZ 8 140 Control and refrigerant A New A control and R410A __ Power supply V Single phase 220 230 240V 50Hz Y 3 Phase 380 400 415V 50Hz __ Indicates equivalent to rated cooling capacity X0 1kW Multi type heat pump inverter outdoor unit m Branch box Applicable refrigerant R410A r Symbol of factory PAC l 53 L Branch box Controller Model type Number of branches 5 5 branches 3 3 branches Indispensable Optional parts OCH480D 6 2 3 TYPICAL COMBINATION EXAMPLE Branch box is located INSIDE of condominium Branch box Installing branch box indoors Only 1 piping is required between the outdoor and indoor offering a fine external view Branch box 5 branch type Master bedroom SEZ 60 MSZ 35 MSZ 3
52. 10 Compressor temperature TH4 3 to 217 3 to 217 When the discharge thermistor detects 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 105 0 5 secs 0 5 2 secs 1 gt 05 gt F Output step of outdoor FAN 0 to 10 The number of ON OFF times of com pressor 0 to 9999 0 to 9999 When the number of times is 100 or more hundreds digit tens digit and ones digit are displayed by turns Example When 42500 times 425 100 times 0 5 secs 0 5 secs 2 secs 4 525 gt Compressor integrating operation times 0 to 9999 0 to 9999 When it is 100 hours or more hundreds digit tens digit and ones digit are displayed by turns Example When 2450 hours 245 10 hours 0 5 secs 0 5 secs 2 gt 45 n 2 secs 10 hours Compressor operating current 0 to 50 0 to 50 Note Omit the figures after the decimal fractions Compressor operating frequency 0 to 225 0 to 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 secs 0 5 2 secs 1 25 gt t J LEV opening pulse
53. 100 1 5 1 8 2 0 2 2 2 5 3 5 4 2 5 0 6 0 7 1 8 0 10 0 2 Sample calculation D System assembled from indoor and outdoor unit in this example the total capacity of the indoor units is greater than that of the outdoor unit Outdoor unit MXZ 8B140VA Indoor unit MSZ EF25VE x 2 PEAD RP50JAQ x 2 Q According to the conditions in the total capacity of the indoor unit will be 2 5 x 2 5 0 x 2 15 0 The following figures are obtained from the 150 total capacity row of the standard capacity diagram INDOOR UNITS COMBINATION SHEETS at the back of the manual Outdoor unit current A 230V Outdoor unit power consumption KW Capacity KW Heating 22 0 Cooling 22 9 Heating 5 01 Cooling 5 22 Heating 16 0 Cooling 14 0 4 1 2 Method for obtaining the heating and cooling capacity of an indoor unit model capacity total model capacity of all indoor units 1 The capacity of each indoor unit kW the capacity or x 2 Sample calculation using the system described above in 4 1 1 2 During cooling The total model capacity of the indoor unit is 2 5 x 2 5 0 x 2215 0kW Therefore the capacity of MSZ EF25VE and PEAD RP50JAQ will be calculated as follows by using the formula in 4 1 2 1 During heating The total model capacity of indoor unit is 2 5 x 2 5 0 x 2 15 0 Therefore the capacit
54. 14 14 1 5 1 5 1 5 1 6 17 17 1 8 1 9 1 9 2 0 2 1 2 1 2 2 2 2 2 3 2 3 2 4 2 4 2 5 2 6 2 6 27 2 8 2 8 2 9 2 9 3 0 3 0 3 1 3 2 3 2 3 3 3 3 3 4 3 5 3 5 3 6 3 6 3 7 3 8 3 8 3 9 4 0 4 0 4 1 4 1 42 4 3 44 44 4 5 4 5 4 6 4 7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 35 4 48 36 4 1 0 1 1 1 1 1 2 1 2 1 3 1 4 1 4 1 5 1 5 1 6 1 6 1 7 1 8 1 8 1 9 1 9 2 0 2 1 2 2 2 2 2 3 2 3 24 24 2 5 2 6 2 6 2 7 2 7 2 8 2 9 2 9 3 0 3 1 3 1 3 2 3 3 3 3 3 4 3 5 3 5 3 6 3 7 3 7 3 8 3 8 3 9 4 0 4 0 4 1 4 2 4 3 4 3 4 4 4 4 4 5 4 6 4 7 4 7 4 8 4 8 4 9 5 0 3 3 4 4 5 5 6 6 7 7 7 8 8 9 9 9 0 0 1 1 1 1 2 2 2 3 3 3 3 4 4 4 4 5 5 6 6 7 7 7 8 8 9 9 0 0 0 1 1 2 2 3 3 3 4 4 5 5 5 6 6 7 7 15 1 2 1 3 1 4 1 5 20 1 5 1 6 22 1 6 23 1 7 24 1 7 25 1 7 26 1 8 27 1 8 28 1 9 29 1 9 30 2 0 2 0 32 2 0 33 2 1 34 2 1 35 2 2 36 2 2 37 2 2 38 2 3 39 2 3 40 2 3 2 3 42 2 4 43 2 4 44 2 4 45 2 5 46 2 5 47 2 5 48 2 5 49 2 6 50 2 6 51 2 7 52 2 7 53 2 7 54 2 8 55 2 8 56 2 9 57 2 9 58 3 0 59 3 0 3 1 61 3 1 62 3 2 63 3 2 64 3 2 65 3 3 3 3 67 3 4 3 4 3 5 70 3 5 3 5 72 3 6 73 3 6 74 3 7 75 3 7 76 3 8 77 3 8 78 3 9 79 3 9 3 10 12 MXZ 8B160YA Total capacity of Capacity W indoor unit Power Consumpt
55. 5 MSZ 25 MSZ 25 Bedroom 1 Bedroom 2 m Verification The rated capacity should be determined by observing the table below The units quantities are limited in 2 to 8 units For the next step make sure that the selected total rated capacity is in a range as shown below The total indoor unit capacity should be within the outdoor units Combination of excessive indoor units and an outdoor unit may reduce the capacity of each indoor unit The rated indoor capacity is as the table below MXZ 8B140 3 0 18 5 kW MXZ 8B160 3 0 20 2 kW Example MXZ 8B140 SEZ 60 6 0 T MSZ 35 3 5 MSZ 35 35 Total rated capacity 18 0 lt 18 5kW MSZ25 2 5 MSZ25 2 5 Indoor unit type capacity class Rated capacity cooling KW OCH480D 7 ee 2 4 INSTALLATION 2 4 1 Outdoor unit installation location For best performance select proper position e Avoid places where combustible gas may be generated or leak e Avoid direct sunlight or other sources of heat e Install sunshade to protect the outdoor unit if direct sunlight hits the unit e Install the outdoor unit with enough distance between neighbours as operation noise may disturb the neighbours e Avoid the position that the unit is covered by snow or snow blows directly against the air outlet The snow block or blow will reduce the airflow of the outdoor unit In the areas of heavy snow special co
56. 68 5000 1 72 5100 1 75 5200 1 79 5300 1 82 5500 1 89 5 o gt 5600 1 92 5700 1 96 5800 1 99 5900 2 03 6000 2 07 6200 2 14 6300 2 17 15 19 20 2 3 4 5 6 7 8 9 0 2 3 4 5 6 7 8 9 0 42 43 44 45 46 47 48 49 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 7 0 2 3 4 5 6 7 8 9 ad 2 7 3 0 3 2 3 3 3 5 3 6 3 8 4 4 3 4 4 4 6 4 7 4 9 5 2 5 4 5 5 5 7 5 8 6 2 6 5 7 3 7 6 7 7 7 9 8 2 8 4 8 7 8 8 9 9 3 9 5 10 0 10 1 5 9 3 0 3 2 3 3 3 5 3 6 3 9 1 2 4 5 7 5 0 5 1 5 3 5 4 5 6 5 9 6 2 6 3 6 5 7 2 7 4 7 7 7 9 8 3 8 4 8 7 9 1 9 4 9 5 9 7 6400 2 21 6500 2 25 6600 2 28 6700 2 32 6900 2 39 7000 2 43 7100 2 47 7200 2 50 7 3 3 3 5 3 7 3 9 0 2 3 5 8 9 5 1 5 2 5 5 5 9 6 2 6 4 65 7 1 8 2 84 8 5 8 7 9 1 9 3 9 5 N 10 0 10 2 10 5 10 7 10 8 11 0 11 2 10 7 11 3 10 9 80 280721 83 84 85 87 88 89 115 90 110 aa 93 94 95 96 9r 98 100 1 1 1 10 1 10 2 10 4 10 5 10 0 10 1 10 2 10 4 7300 2 54 7400 2 58 7500 2 62 7700 2 69 7800 2 73 7900 2 77 8000 2 80 8100 2 84 8200 2 88 3 7 3 9 4 0 4 2 4 4 4 5 4 7 4 8 5 0 5 1 5 2 5 4 5 5 5 6 5 8 5 9 6 1 6 2 6 3 6 5 6 7 6 7 7 0 7 1 7 2 7 3 74 7 5 7 6 7 6 7 7 7 8 7 9 8 1 8 2 84 8 5 8 8 9 2 9 3 9 5 9
57. 8 8 AC35OV BA ACQSUMV GA ACZS0V 6A N N 2 M MFM MM 1 2 w 7 N MLL ei 4 i d J 6 A 4 L1 A2 L2 A2 L3 A2 L1 OU L2 OU L3 OU Connect to the ACL1 ACL2 ACL3 Connect to the outdoor power circuit board TB L1 L2 L3 OCH480D 44 8 8 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 1 Function of switches The black square m indicators a switch position Type of Action by the switch operation Switch Switch Function ON OFF Effective timing When compressor is Forced defrost Start Normal operating in heating operation Abnormal history clear Clear Normal off or operating No function ON 123456 Indoor No 6 Dip switch OC Self diagnosis Indicating a particular Indoor unit selection self diagnosis BC 1 5 branch type BC 2 3 branch type A B C D B C R R B Indoor Indoor Indoor Indoor Indoor No 1 No 2 No 3 No 4 No 5 RC BC 1 branch box controller unit Number 1 1 blinking LED2 branch box controller board BC 2 branch box controller unit Number 2 2 blinking LED2 branch box controller board Test run Operating OFF Test run mode setting Heating Cooling Under s
58. Adaptor for reverse flow check Attach on vacuum pump Refrigerant charge base Only for RA10A Top of cylinder Pink Oylinder with syphon Charge hose Refrigerant cylinder Refrigerant recovery equipment OCH480D 3 pT 2 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series Although the refrigerant piping work for R410A is same as for R22 exclusive tools are necessary so as not to mix with different kind of refrigerant Furthermore as the working pressure of R410A is 1 6 times higher than that of R22 their sizes of flared sections and flare nuts are different Thickness of pipes Because the working pressure of R410A is higher compared to R22 be sure to use refrigerant piping with thickness shown below Never use pipes of 0 7 mm or below Diagram below Piping diameter and thickness Nominal Outside dimensions inch diameter mm 1 4 6 35 3 8 9 52 1 2 12 70 5 8 15 88 3 4 19 05 Thickness mm Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants In addition to that R410A is a refrigerant which has higher risk of leakage because of its working pressure higher than that of other refriger ants Therefore to enhance airtightness and intensity flare cutting dimension of copper pipe for R410A has been speci f
59. BT error display Undervoltage U9 Error status during the Error postponement period 20 Display examples for multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0 T phase interruption 04 PFC error 10 14 OCH480D 54 8 9 SELECTING FUNCTIONS USING THE CONTROLLER Each function can be set according to necessity using the remote controller The setting of function for each unit can only be done by the remote controller Select function available from the table 1 1 Functions available when setting the unit number to 00 1 The functions table below are available only when P series indoor unit and the wired remote controller is used 2 After the power supply returns the indoor unit does not operate for 3 minutes Some kind of indoor units operate for 30 seconds after that it stops for 3 minutes Above operation is normal Table 1 Function selections Function Settings Setting No Initial setting when sent from the factory Remarks Power failure automatic recovery OFF ON 2 Indoor temperature detecting Data from the indoor unit with remote controller Data from main remote controller LOSSNAY connectivity Not supported Supported Indoor unit does not intake outdoor air through LOSSNAY Supported Indoor unit intakes outdoor air throu
60. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS March 2014 No OCH480 REVISED EDITION D HFC utilized TECHNICAL amp SERVICE MANUAL Outdoor unit Service Ref or Model Name Added connectable indoor unit MXZ 8B140VA MXZ 8B140VA MEZAKI2SVE MFZ KJ35VE and MFZ KJ50VE in REVISED MXZ 8B160VA EDMOND Some descriptions have MXZ 8B140YA MXZ 8B140YA Please void OCH480 REVISED EDITION C MXZ 8B160YA M XZ 8 E 1 6 This service manual describes technical data of outdoor unit As for indoor units and branch box OCH508 refer to its service manual RoHS compliant products have lt G gt mark on the spec name plate CONTENTS 1 SAFETY PRECAUTION 2 2 OVERVIEW OF UNITS 2092080009000000058209909809900000000996 5 3 SPECIFICATIONS meer sister 12 4 DATA hbnonennaneednmeonnnonnnonimmaneeennmenonnneanneeneneenimeonnnnn 13 5 OUTLINES AND DIMENSIONS 17 UL 6 WIRING DIAGRAM 18 7 NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 20 A TROUBLESHOOTING 22 h 9 ELECTRICAL WIRING
61. DM Connector Connected for Option Contact Input LED3 Light Emitting Diode Operation Inspection Indicators F1 F4 Fuse T6 3AL250V X51 X52 X54 X55 Relay 1 1 MODEL SELECT x X DCL a a The black square indicates a switch position E Ej ITI MODEL SW6 w u 77 12345678 140 ON rper s cvi OFF MC z m onl 12345678 a S x cv orr aas S FH TB1 BRANCH BOX 1 l c POWER SUPPLY Operation Inspection Displa Spray 220 230 240V 50Hz LED on the controller board display the operation and inspection status as follows 220V 60Hz If LED does not light it indicates that no power is supplied to the board Details Code Details Code ET Compressor temperature fault U2 Power tumed on Low discharge superheating fault Erroneous connection of refrigerant pipes or U7 Normal statu Operation status display the connecting wires such as C5 H7 High pressure fault 63H operates 01 Faulty status 83L connector red is open F3 Low pressure fault 63L operates UL blinking 63H connector yellow is open F5 Abnormality of power moduls 06 2 connectors 63H 63L are open F9 Compre
62. H High pressure sensor 63HS Low pressure switch 63L Solenoid valve coil 4 way valve 2154 Solenoid valve coil Bypass valve SV1 Solenoid valve coil Returning oil bypass Bypass valve SV2 5 Remove the terminal cover and disconnect the compressor lead wire 6 Remove an electrical parts box fixing screw 4 x 10 and detach the electrical parts box by pulling it upward The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right Photo MXZ 8B140 160VA Photo 4 Controller circuit board C B Electrical parts box I Vv E C ET Valve bed lt Compressor X Cover panel Front Cover panel fixing screws OCH480D 64 PT OPERATING PROCEDURE PHOTOS 4 Removing the thermistor lt Outdoor 2 phase pipe gt TH6 Photo 5 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 Controller circuit board Thermistor 3 Disconnect the connectors TH6 and TH7 red on the C B Outdoor 2 phase pipe TH8 controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box 5 Pull out the thermistor Outdoor 2 phase pipe TH6 from the sensor holder Note In case of replacing thermistor Outdoor 2 phase pipe TH6 replace it together with thermistor Outdoor TH7 since they are combined together Refer to No 5 below t
63. TH4 Thermistor R120 7 465 2 B constant 4057 2 1 1 Rt 7 465exp 4057 57311 393 300 20 250 70 C 34 30 160 80 24 40 104 90 C 17 5 50 C 70 100 C 13 0 kQ 60 C 48kQ 110 C 9 8 100 Resistance kQ HIGH PRESSURE SENSOR 0 OUTDOOR Vout V CONTROLLER CIRCUIT BOARD 25 50 75 100 120 Temperature SENSOR 5V DC PRESSURE Q Output Vout DC MPa OCH480D 39 8 7 TEST POINT DIAGRAM CAUTION TEST POINT is high voltage 8 7 1 Outdoor controller circuit board MXZ 8B140VA MXZ 8B140YA MXZ 8B160VA MXZ 8B160YA CNDM to Input of low level sound priority mode CN51 to Input of external contact point CN3S SW7 SW9 SW2 SW1 Forced defrost detect history record reset SW6 gt S E SW4 Hx Test operation l CN52C Connect to the noise fil ter circuit board CN52C MXZ 8B140 160VA SW5 US 4 i E Function switch i gt rse a Swe d A Transmission to out door power circuit 2 board CN4 LED i SV1 Solenoid valve 1 jd ER 63L 21 SV2 Low pressure switch o Bs i Solenoid valve 2 amp 5 css cis 2H x igh pressure sensor 3 2184 Four way valve TH4 Thermistor 8 lt Compr
64. V Y model 350V Decrease in power source voltage instantaneous stop Disconnection or loose connection of CN52C on the outdoor power circuit board controller circuit board V model Defective converter drive circuit in outdoor power circuit board V model Defective 52C drive circuit in outdoor power circuit board Defective outdoor converter circuit board Y model amp Disconnection or loose connection of rush current protect resistor RS Y model Defective rush current protect resistor RS Y model Disconnection or loose connection of main smoothing capacitor CB V model 9 Disconnection or loose connection of CN2 on the outdoor power circuit board controller circuit board V model Power circuit failure on DC supply for 18V DC output on outdoor controller circuit board V model Check the field facility for the power supply Check CN52C wiring V model Replace outdoor power circuit board V model Replace outdoor power circuit board Replace outdoor converter circuit board Y model Check RS wiring Y model Replace RS Y model Check CB wiring V model 9 Check CN2 wiring V model Replace outdoor controller circuit board V model OCH480D 31 Abnormal point and detection method Case Judgment and action Detailed Input current sensor error codes L1 phase open error Decrease in input current through outdoo
65. anch pipe liquid pipe total length a1 a7 0 01 x 12 13m 0 25kg Therefore the additional refrigerant charging amount is 3 2kg 0 25kg 3 45kg Reference The refilling amount of refrigerant at servicing Example 3 45 8 5 11 95kg The amount of refrigerant of initial charge 8 5kg is added Although two 926 35 liquid pipes are used between the branch box and the Y shape connection pipe when connecting the P100 indoor unit calculate the additional refrigerant charging amount assuming only one 29 52 liquid pipe is used 12 2 REFRIGERANT COLLECTING PUMP DOWN Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit D Turn off the circuit breaker Connect the low pressure side of the gauge manifold to the service port of the gas side stop valve Close the liquid stop value Supply power circuit breaker Start up of the indoor outdoor communication takes about 3 minutes after the power circuit breaker is turned on Start the pump down opera tion 3 to 4 minutes after the power circuit breaker is turned ON Perform the test run for cooling operation SW4 1 ON and SW4 2 OFF The compressor outdoor unit and ventilators indoor and outdoor units start operating and test run for cooling operation begins Only set the SW4 1 and SW4 2 to ON if the unit is stopped However even if the unit is stopped and the SW4 1 and SW4 2 are set to ON less than 3
66. cc between 5 and 4 of the fan connector DC15V lt 15 Yes gt C Replace the fan motor No V Yes OK Check the operation of fan gt END Replace outdoor controller board Y NG C Replace outdoor controller board Y OK Check the operation gt END Y C Replace the fan motor OCH480D 38 _ Thermistor feature chart Low temperature thermistors Pipe temperature thermistor Liquid TH3 Pipe temperature thermistor Cond TH6 Outdoor temperature thermistor TH7 Gas pipe temperature thermistor TH A Branch box Thermistor RO 15 3 96 B constant 3480 2 96 Resistance kQ 1 1 Rt 15exp 3480 273 t 273 15 30C 43kQ 10 C 9 6 40 3 0 20 63 25 54 20 10 0 10 20 30 40 50 Temperature Medium temperature thermistor 200 Heatsink temperature thermistor TH8 Thermistor R50 17 KQ 2 B constant 4170 3 150 1 1 Rt 17exp 4170 273 t 323 180 25 C 50kQ 50 17kQ 70 8 kQ 90 4 Resistance 50 i 25 50 75 100110 125 Temperature High temperature thermistor 900 Compressor temperature thermistor
67. ct short cycle Bypass circuit of outdoor unit fault Discharging temperature and indoor heat exchanger temperature does not rise Inspect the failure by checking discharg ing pressure Replace linear expansion valve If refrigerant leaks discharging tempera ture rises and LEV opening increases Inspect leakage by checking the tem perature and opening Check pipe connections for gas leakage Check the insulation Open intake grille and check the filter Clean the filter by removing dirt or dust on it If the filter is clogged indoor pipe tem perature rises and discharging pressure increases Check if heat exchanger is clogged by inspecting discharging pres sure Clean the heat exchanger Remove the blockage Check refrigerant system during opera tion 3 0 For 3 minutes after temperature adjuster turns off the compres sor will not start operating even if temperature adjuster is turned on For 3 minutes after temperature adjuster turns on the compressor will not stop operating even if tem perature adjuster is turned off Compressor stops operating immediately when turning off by the remote controller OCH480D CQ Normal operation For protection of compressor 35 Normal operation ss 8 5 SPECIAL FUNCTIONS 8 5 1 Low noise mode on site modification Fig 8 1 By performing the following modification operation noise of the outdoor unit can be reduced by ab
68. ct to the outdoor controller circuit board CNAC 95 99 94 eges CY4 b 5 G o9 T CNDC Connect to the outdoor controller circuit board V LO1 LO2 LO3 oe POWER SUPPLY Connect to the ACL4 Connect to the outdoor converter circuit board N IN OCH480D 41 GD3 Connect to the earth CNCT Primary current Connect to the outdoor power circuit board CN5 LO1 LO2 LO2 LO3 LO3 LO1 AC380 400 415V OUTPUT 8 7 3 Outdoor power circuit board MXZ 8B140VA MXZ 8B160VA CN4 Connect to the outdoor controller circuit board CN4 N2 Connect to the smoothing capacitor CB 2 CN2 Connect to the outdoor controller circuit board CN2 1 5 Transmitting signal to outdoor controller circuit board 0 5 V DC 2 5 Zero cross signal 0 5 V DC 3 4 18 V DC 6 5 16 V DC 7 5 16 V DC CN52C 52C driving signal Connect to the outdoor controller circuit board CN52C CNDC 280 380 V DC Connect to the outdoor controller circuit board CNDC E2 E3 Connect to the earth U V W Connect to the compres sor MC Voltage among phases 10 V 180 V AC OCH480D Connect to the smooth ing capacitor CNAC1 CNAC2 NI LI Connect to the 220 240 V AC Voltage of 220 240 V AC DCL1 DCL2 earth C
69. d LI4 L12 LI3 NI Connection Terminal lt L1 L2 L3 N Power Supply gt LO1 LO2LO3INO Connection Terminal lt L1 L2 L3 N Power Supply gt GD1 GD3 Connection Terminal lt Ground gt CONV B Controller Circuit Board L1 A1 IN Connection Terminal L1 Power Supply L1 A2 OU Connection Terminal L1 Power Supply L2 A2 OU Connection Terminal L2 Power Supply L3 A2 OU Connection Terminal L3 Power Supply N IN Connection Terminal N Power Supply CK OU Connection Terminal CK C B Controller Circuit Board SW1 Switch lt Forced Defrost Defect History h Record Reset gt STT 5 Sw2 Switch Self Diagnosis Switch sw4 Switch lt Test Operation gt TB2 z SW5 Switch Function Switch Sw6 Switch lt Model Select gt 94 Sw7 Switch lt Function Setup gt SW8 Switch lt Function Setup gt 82 9 Swo9 Switch Function Setup BRANCH CN31 Connector BOX 3 m gt CN51 Connector lt Connection for Option gt c SS Connector Connection for Option CN3S Connector Connection for Option a x CNIT Connector lt Connection for Option gt g E CNDM Connector Connected for Option Contact Input TB1 LED3 Light Emitting Diode Operation Inspection Indicators gt x L1 RED RED 4 Fuse T6 3AL250V M m ACL2 X51 X52X54 X55 Relay SUPPLY UM be 2d INNA 38014001415V BLK PN WWW 50Hz x othe eel ON BLU BLU 1 MODEL SELECT The black sq
70. d then wait for at least 1 minute Components other than the outdoor board may be faulty Check and take corrective action referring to the service manual Do not replace the outdoor board without checking OCH480D 18 MXZ 8B140YA MXZ 8B160YA 63H 63 63HS SYMBOL NAME TH7 TH6 TH3 la TB1 Terminal Block Power Supply C B The black Square g indicates TB2 Terminal Block Branch Box a switch position MC Motor for Compressor MF1 LH 1 MF2 Fan Motors 3333 oc 2 7 WHT Y w 2 21 T 3 1 5 o 21S4 Solenoid Valve lt Four Way Valve gt TH7 6 TH3 TH4 63HS CNIT 5 5 63H High Pressure Switch RED WHT WHT WHT RED cm 02 63L Low Pressure Switch z 63HS High Pressure Sensor 63L i SV1 SV2 Solenoid Valve lt Bypass Valve gt RED 1 CNM 14 TH3 Thermistor Outdoor Pipe WHT a 5 Thermistor Compressor TH6 Thermistor Outdoor 2 Phase Pipe
71. door unit is closed Decrease of power supply volt age Looseness disconnection or converse of compressor wiring connection Defective fan of indoor outdoor units Short cycle of indoor outdoor units Defective input circuit of out door controller board Defective compressor Open stop valve Check facility of power supply Correct the wiring U V W phase to com pressor Refer to 8 7 TEST POINT DIAGRAM Check indoor outdoor fan Solve short cycle Replace outdoor controller circuit board Check compressor Refer to 8 6 HOW TO CHECK THE PARTS Note Before the replacement of the outdoor con troller circuit board disconnect the wiring for compressor from the outdoor power circuit board and check the output voltage among phases U V W during test run No defect on board if voltage among phases U V V W and W U is same Make sure to perform the volt age check with same performing frequency EO No display Remote controller communication error Signal receiving error 1 Abnormal if any signal from IC of refrigerant address 0 could not be normally received for 3 minutes 2 Abnormal if sub remote controller could not receive any signal for 2 minutes Defective communication circuit of remote controller Defective communication circuit of indoor controller board of refrigerant address 0 Noise has entered into transmis sion line of remote controller
72. e S1 S2 S3 Open 55 Connect S1 and S3 to the opposite angle 4 Flat 0009 1 5 From left to right S1 Open S2 S3 1 Power supply cords of appliances shall not be lighter than design 60245 IEC or 60227 IEC 2 In case that cable with stripe of yellow and green is available 3 In case of regular polarity connection S1 S2 S3 wire size is 1 5 mm2 OO lt 3C Flat cable x 2 4 In case of regular polarity connection 51 52 53 S1 62 S3 5 In the flat cables are connected as this picture they can be used up to 55 m 6 Mentioned cable length is just a reference value It may be different depending on the condition of installation humidity or materials etc Be sure to connect the outdoor branch box indoor units branch box connecting cables directly to the units no intermediate connections Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point If an intermediate connection is necessary be sure to take measures to prevent water from entering the cables OCH480D 58 11 SYSTEM CONTROL 11 1 BASIC SYSTEMS
73. e panel See Photo 1 2 Remove the top panel See Photo 1 Removing the solenoid valve coil lt 4 way valve gt 3 Remove 4 way valve solenoid coil fixing screw M5 6 4 Remove the solenoid valve coil lt 4 way valve gt by sliding the coil toward you 5 Disconnect the connector 2154 green on the controller circuit board in the electrical parts box 8 Removing the 4 way valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 and then remove the valve bed 4 Remove 4 right side panel fixing screws 5 x 12 in the rear of the unit and then remove the right side panel 5 Remove the solenoid valve coil lt 4 way valve gt See Photo 8 6 Recover refrigerant 7 Remove the welded part of 4 way valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel Note 3 When installing the 4 way valve cover it with a wet cloth to prevent it from heating 120 C or more then braze the pipes so that the inside of pipes are not oxidized Photo 8 4 way valve Solenoid valve coil lt 4 way valve gt 2154 Solenoid valve coil lt 4 way valve fixing screw 9 Removing solenoid valve coil Bypass valve SV1 and bypass valve 1 Remove the service panel See Photo 1
74. each indoor units each 3m 2 Guaranteed operating range Indoor P series M series S series Upper limit D B 35 C W B 22 5 D B 32 W B 23 D B 46 C Lower limit 19 W B 15 C D B 21 W B 15 5 Upper limit 28 D B 27 C D B 21 C W B 15 C Lower limit D B 17 C D B 20 C 15 W B 15 Outdoor Cooling Heating 3 Guaranteed voltage MXZ 8B140 160VA 198 264V 50Hz MXZ 8B140 160YA 342 456V 50Hz 4 Above data are based on the indicated voltage MXZ 8B140 160VA Single 50Hz 220 230 240V MXZ 8B140 160YA 3 phase 50Hz 380 400 415V Refer to service manual of indoor unit for the indoor unit s specifications OCH480D 12 4 4 1 COOLING AND HEATING CAPACITY AND CHARACTERISTICS 4 1 1 Method for obtaining system cooling and heating capacity To obtain the system cooling and heating capacity and the electrical characteristics of the outdoor unit first add up the ratings of all the indoor units connected to the outdoor unit see table below and then use this total to find the standard capacity with the help of the tables at the back of the manual INDOOR UNITS COMBINATION SHEETS 1 Capacity of indoor unit DATA Model number Model Model Model Model Model Model Model Model Model Model Model Model for indoor unit 15 18 20 22 25 35 42 50 60 71 80
75. ecover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel Note 3 When installing the high pressure sensor cover it with a wet cloth to prevent it from heating 100 C or more then braze the pipes so that the inside of pipes are not oxidized OCH480D 67 MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2011 MITSUBISHI ELECTRIC CORPORATION Distributed in Mar 2014 No OCH480 REVISED EDITION D Distributed in Jun 2013 No OCH480 REVISED EDITION C Distributed in Apr 2013 No OCH480 REVISED EDITION B Distributed in Sep 2011 No OCH480 REVISED EDITION A Distributed in Jul 2011 No OCH480 Made in Japan New publication effective Mar 2014 Specifications are subject to change without notice MXZ 8B140VA Before calculating the sum of total capacity of indoor units please convert the value into the kW model capacity following the formula 4 1 2 Method of obtaining the heating and cooling capacity of an indoor unit Power Consumption Total capacity of Capacity W kW Current A 220V Current A 230V Current A 240V Cooling Cooling 1500 0 80 160 0 84 170 0 87 180 0 91 190 0 95 200 0 98 2100 1 02 2200 1 05 230 1 08 240 1 11 250 1 14 260 1 17 270 1 20 280 1 23 290 1 26 300 1 28 3100 1 31 3200 1 33 330 1 36 340 1 38 350 4000 1 41 360 1 43 370 1 45
76. ered to be abnormal if the rotational frequency of fan motor is abnormal when detected during operation Fan motor rotational frequency is abnormal 100 rpm or below detected continuously for 15 seconds at 26 C or more outside air temperature 50 rpm or below or 1500 rpm or more detected continuously for 1 minute Failure in the operation of the DC fan motor Failure in the outdoor circuit controller board D Check or replace the DC fan motor Check the voltage of the outdoor circuit controller board during operation G Replace the outdoor circuit controller board when the failure is still indicated even after performing the remedy above Detailed codes To find out the details about U9 error turn ON SW2 1 2 2 2 3 2 4 2 5 and 2 6 when U9 error occurs Refer to 8 8 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS Overvoltage error Increase in DC bus voltage to V model 400V Y model 760V Abnormal increase in power Source voltage Disconnection of compressor wiring Defective outdoor power circuit board Compressor has a ground fault D Check the field facility for the power supply Correct the wiring U V W phase to com pressor Refer to 8 7 Outdoor power circuit board Replace outdoor power circuit board Check compressor for electrical insulation Replace compressor Undervoltage error e Instantaneous decrease in DC bus voltage to V model 200
77. essor gt TH3 cd np EJ Thermistor t o Outdoor pipes t Ce CN2 Connect to the outdoor TH7 6 Y ircui Thermistor power circuit board CN2 Reception from power circuit board Zero cross signal Outdoor 2 phase pipe CAUTION 63H i 0 5V DC High pressure switch Not used 8 6 16V DC 16V DC i 3i bet to Power supply for outdoor controller circuit board 220V 240V AC an in 4 to Power supply for um as indoor and outdoor unit connection wire GNE KO D 220 240V AC Vsp SN i CNS sl con on ne 1 S2 220 240V AC when stopped DC 1 Branch box outdoor 6 5V CNF1 CNF2 CNDC gaz unit connecting wire Canen operated ae Gono De Communication power supply 15V Outdoor power circuit D71 Voltage 8 4 0 6 5V DC board for VA 24V DC 15V DC When stopped Noise filter airdit Basi 7 5V DC When operated Noise filter circuit boan 0V 15V pulse for YA OCH480D 40 8 7 2 Outdoor noise filter circuit board MXZ 8B140YA MXZ 8B160YA LI1 LI2 LI3 NI POWER SUPPLY LI1 LIZ2 LI LIS LI3 LI1 AC380 400 415V input LI1 NI LI2 NI LI3 NI AC220 230 240V input Connect to the terminal block TB1 2 2 GD1 H Connect to the earth HI A 0 e e 6 1901654 5 ot ee ee ee CNAC1 CNAC2 AC220 230 240V Conne
78. extraction may occur For the connection of P100 indoor unit s use the refrigerant pipes specified in the table below Distance between ouj Branch box z branch box and Gas Y shape connection pipe Y shape connection Port A CE 65 yh pipe a a b a b Port OB m 23 1 to 10 m 6 35 9 52 9 52 15 88 10 m more 6 35 9 52 12 7 1 15 88 Port C 8 Lenath limit 1 To connect a 12 7 gas pipe use a joint pipe MAC A454JP 1 m sa Port D E8 a bs15 m Port E a 1 Valve size for outdoor unit For liquid 9 52 mm For gas 15 88 mm 2 Valve size for branch unit Liquid pipe 6 35 mm Gas pipe 9 52 mm Liquid pipe 6 35 mm Gas pipe 9 52 mm Liquid pipe 6 35 mm Gas pipe 9 52 mm Liquid pipe 6 35 mm Gas pipe 9 52 mm Liquid pipe 6 35 mm Gas pipe 12 7 mm 3 branch type is only for A B and C unit Different diameter joint optional parts Fig 7 1 Connected pipes diameter Diameter A Diameter Conversion formula Model name 1 4 inch mm mm mm MAC A454JP 9 52 12 7 9 52 12 7 3 8 MAC A455JP 12 7 9 52 12 7 9 52 1 2 inch MAC A456JP 12 7 15 88 12 7 15 88 9 8 inch
79. gerants can be used Charging cylinder Refrigerant charge Tool exclusive for R410A X Prepare a new tool Use the new tool as the tool exclusive for R410A A Tools for other refrigerants can be used under certain conditions Tools for other refrigerants can be used OCH480D 4 2 OVERVIEW OF UNITS 2 1 CONSTRUCTION OF SYSTEM MXZ 8B140VA 160VA MXZ 8B140YA 160YA 5HP 6HP Rated Cooling 14 0 15 5 capacity KW Heating 16 0 18 0 Refrigerant R410A Type 15 Type 100 Outdoor unit Indoor unit Capacity CAUTION The indoor unit which rated capability exceeds that can be 10 0kW 100 type can NOT be connected connected Number of units 2 8 units Total system wide capacity 21 132 of outdoor unit capacity 3 0 kW 18 5 KW 19 130 of outdoor unit capacity 3 0 KW 20 2 kW Branch box that can be Number of units 1 2 units connected Connectable indoor unit lineup Heat pump inverter type Capacity class kW 2 2 2 5 3 5 4 2 5 0 6 0 Model type Model name Deluxe MSZ FA25 35VA MSZ FB25 35 50VA H MSZ FD25 35 50VA MSZ FH25 35 50VE Wall Standard MSZ GA22 25 35 50 60 7 1 80VA MSZ GB50VA MSZ GC22 25 35VA MSZ GC22 25 35 50 60 7 1NA MSZ GE22 25 35 42 50 60 7 1 80VA MSZ SF25 35 42 50VE MSZ GE22 25 35 42 50 60 7 1NA MSZ GF60 71VE MSZ EF18 22 25 35 42 50VE Compact MSZ SF15 20VA Low static p
80. gh pressure sensor and converted to satu ration temperature exceeds 40 C during defrosting and compressor temperature thermistor TH4 exceeds 110 C 2 Refrigerant shortage abnormality When the conditions of below detecting mode or are satisfied 1st detec tion during the compressor operation the compressor stops and restarts operation in 3 minutes lt Detecting mode I gt When the below conditions are satisfied completely 1 Compressor is operating in HEAT mode 2 Discharge superheat is 70 or more 3 Difference of outer temperature thermistor TH7 and outdoor piping temp thermistor TH3 applies to the formula of TH7 TH3 lt 5 4 High pressure sensor is below about 2 04MPa lt Detecting mode gt When the below conditions are satisfied completely 1 Compressor is operating 2 When cooling discharge superheat is 80 C or more When heating discharge superheat is 90 or more High pressure sensor is below about 2 32MPa When the conditions of detecting mode I and are satisfied again 2nd detection within 30 minutes since the compressor has stopped and restarts operation in 3 minutes When the conditions of detecting mode I and are satisfied again 3rd detec tion within 30 minutes since the com pressor has stopped it stops abnormal ity in this time lt U2 gt is displayed When the conditions of detecting mode 1 are satisfied again after 30 minutes since the compressor
81. gh LOSSNAY Power supply voltage 240V 220V 230V Frost prevention temperature 2 C Normal 3C Humidifier control OCH480D When the compressor operates the humidifier also operates When the fan operates the humidifier also operates 55 The setting is applied to all the units in the same refrigerant system 9 ELECTRICAL WIRING 9 1 EXTERNAL WIRING PROCEDURE Fig 9 1 Power supply 140 160V Single 220 230 240 50 Hz 220V 60Hz 140 160Y 3 phase 380 400 415V 50Hz Max Permissive system Impedance 0 22 Q Note Power supply input Outdoor unit only Connect the lines C D in accordance with the terminal block names to ensure correct polarity As for lines C 51 and S2 are for connecting the power source And S2 and S3 are for signals S2 is a common cable for the power source and signal Wire diameter Breaker B Earth line A Main power C Signal line D Signal line Interrupting Performance Earth line Earth line current characteristic Model line 1 5 mm 1 1 5 mm 40 A 30 mA 2 2 7 140 160V S 0 mm Somm Min 1 5 mm Min 1 5 mm ABA for 0 1 sec or less 1 5 mm 1 1 5 mm 25 A 30 mA 2 2 7 140 160Y tomm Min 1 5 mm Min 1 5 mm an for 0 1 sec or less When using twisted wire for the wiring the use of round terminal is required 1 Max 45 m Outdoor unit
82. gth m 1 Heating Capacity 0 95 ratio 96 0 9 20 40 60 Corrected piping length m 2 Method for Obtaining the Corrected Piping Length 80 Corrected piping length Actual piping length between outdoor unit and the farthest indoor unit 0 30 x number of bends in the piping m OCH480D 15 4 3 NOISE CRITERION CURVES MICROPHONE O 1m UNIT 1 5 GROUND MXZ 8B140VA MODE SPL dB LINE MXZ 8B160VA MODE SPL dB LINE COOLING 50 COOLING 51 2 8 140 M MXZ 8B160YA 90 I I I 7 I I 7 7 90 ale de ae 3 4 3 3 s s S 80 S 80 m 70 70 t t 60 60 gt gt uj 4 50 50 gt a ul ul 40 40 a a 5 5 9 30 9 30 a a 2 F 2 ES E t d F E f 20 APPROXIMATE 4 f 20 i gt T THRESHOLD OF 1 q THRESHOLD OF T T T gt HEARING FOR i 2 HEARING FOR d E F t CONTINUOUS 4 I i jNC 20 CONTINUOUS a I I i NC 20 NOISE 3
83. h LP switch Discharge thermo Crankcase heater Heat exchanger Plate fin coil Fan Fan drive x No Propeller fan x 2 Fan motor output kW 0 060 0 060 Airflow m min 100 3 530 106 3 742 100 3 530 106 3 742 Defrost method Reverse cycle Noise level Cooling dB 50 51 50 51 Heating dB 52 54 52 54 Dimensions 950 37 3 8 330 30 13 1 3 16 H mm in 1 350 53 1 8 Weight kg Ibs 129 284 139 306 Refrigerant R410A Charge kg Ibs 8 5 18 7 40m Oil Model L 2 3 FV50S Pipe size O D Liquid mm 29 52 Gas mm 15 88 Connection method Indoor side Flared Outdoor side Flared 1 Electrical data is only for outdoor unit o lt Standard performance OUTDOOR UNIT EFRIGERANT PIPING RI Conversion formula 6 35 49 52mm 12 7 15 88mm 19 05mm 1 4 inch 3 8 inch 1 2 inch 5 8 inch 3 4 inch Notes1 Rating Conditions ISO T1 Cooling Indoor D B 27 C 80 F W B 19 C 66 F Outdoor 35 C 95 F W B 24 C 75 F Heating Indoor D B 20 C 68 F Outdoor D B 7 C 45 F W B 6 C 43 F Refrigerant piping length one way Main Piping From outdoor unit to branch box 5m Branch Piping From branch box to
84. hts Normal operation Operation mode display Lighting LED3 H H Initial setting gt m The tens digit Operation mode The ones digit Relay output Display Operation Model Display COPIE SAL Compressor 4 way valve Solenoid OFF FAN COOLING DRY HEATING DEFROSTING ON ON Hu ON ON ON ON ON ON Display during error postponement Postponement code is displayed when compressor stops due to the work of protection device Postponement code is displayed while error is being postponed jo 3 When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices Inspection unit Contents to be inspected During operation Discharge temperature fault Outdoor unit Low discharge superheating fault Erroneous connection of refrigerant pipes or the Branch box unit connecting wires Indoor unit High pressure fault 63H operates Low pressure fault 63L operates Abnormality of power modules Compressor overcurrent shutoff Start up locked Current sensor fault P B Compressor overcurrent shutoff fault Discharge pipe compressor thermistor TH4 open or short circuit Outdoor unit thermistors TH3 TH6 TH7 and H8 63HS and branch box thermistors open or short circuit HEATSINK temperature fault Abnormali
85. hundreds digit tens Y model 300 to 750 digit and ones digit are displayed by turns Target Sub cool Cooling mode SCm 0 to 255 OCH480D 51 The black square m indicates a switch position SW2 setting Display detail Explanation for display Unit Error postponement code history 2 Postponement code display of outdoor unit Blinking During postponement Code Lighting Cancellation of postponement display 00 is displayed in case of no postponement Error postponement code history 3 Postponement code display of outdoor unit Blinking During postponement Code Lighting Cancellation of postponement display 00 is displayed in case of no postponement Check code history 3 Oldest When no check code history 0 and are dis Alternate display of abnormal unit played by turns Code number and code display Error thermistor display 3 Outdoor pipe temperature Liquid TH3 7 Outdoor outside temperature TH7 When there is no error thermistor 8 Outdoor radiator panel TH8 Code is displayed 23 Branch box pipe temperature Gas TH A to E splay 63 High pressure sensor 63HS Operation frequency on error occurring 0 to 255 0 to 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 secs 0 5 secs 2 secs gt 25 gt
86. i i ii 1 SW2 i i Y ii ON OFF i i i i EE RE Y SW1 Heating Cooling SE SW2 Validity of SW1 Invalidity of SW1 s The indoor unit which is operating in the mode different from the one determined by external signal 5 will be a state of standby The setting becomes effective when the outdoor unit is under stop The operation mode specified by test run will be prior to the mode of this function Fig 8 4 OCH480D 36 8 6 HOW CHECK THE PARTS MXZ 8B140VA MXZ 8B140YA MXZ 8B160VA MXZ 8B160YA Parts name Check points Disconnect the connector then measure resistance with tester Thermistor TH3 Outdoor dte At the ambient temperature 10 30 Thermistor TH4 Normal Abnormal Compressor TH4 160kQ 410kQ Thermistor TH7 TH3 Open or short lt Outdoor gt TH7 4 3kQ 9 6 Thermistor TH8 TH8 39kQ 105kQ lt Heatsink gt Fan motor MF1 MF2 Refer to next page Solenoid valve coil Measure the resistance between the terminals with a tester lt Four way valve gt At the ambient temperature 20 C 2154 MXZ 8B140VA 160VA MXZ 8B140YA 160YA Open or short 1435 x 1500 Motor for compressor Measure the resistance between the terminals with a tester MC Winding temperature 20 C U Normal Abnormal MXZ 8B140VA 160VA MXZ
87. iced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released 1 Cautions for service 1 Perform service after recovering the refrigerant left in unit completely 2 Do not release refrigerant in the air 3 After completing service charge the cycle with specified amount of refrigerant 4 When performing service install a filter drier simultaneously Be sure to use a filter drier for new refrigerant 2 Additional refrigerant charge When charging directly from cylinder Check that cylinder for RA10A on the market is syphon type Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase 3 Service tools 1 Use the below service tools as exclusive tools for R410A refrigerant Tool name Specifications Only for RA10A Gauge manifold Use the existing fitting specifications UNF 1 2 Use high tension side pressure of 5 0 or over Only for RA10A Use pressure performance of 5 09 or over Electronic scale Gas leak detector Use the detector for R134a R407C or R410A
88. ied separately from the dimensions for other refrigerants as shown below The dimension B of flare nut for R410A also has partly been changed to increase intensity as shown below Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below For 1 2 and 5 8 the dimension B changes Use torque wrench corresponding to each dimension p PEDES N Dimension A NS JZ Dimension Flare nut dimensions Nominal dimensions inch 1 4 3 8 1 2 5 8 3 4 Flare cutting dimensions Nominal dimensions inch 1 4 3 8 1 2 5 8 3 4 Outside diameter mm 6 35 9 52 12 70 15 88 19 05 Outside diameter mm 6 35 9 52 12 70 15 88 19 05 Dimension mm R410A R22 17 0 17 0 22 0 22 0 26 0 24 0 29 0 27 0 36 0 Dimension A mm R410A R22 9 1 9 0 13 2 13 0 16 6 16 2 19 7 19 4 23 3 Tools for R410A The following table shows whether conventional tools can be used or not Tools and materials Gauge manifold Charge hose Air purge refrigerant charge and operation check R410A tools Tool exclusive for R410A Tool exclusive for R410A Can R22 tools be used Can 407 tools be used Gas leak detector Gas leak check Tool for HFC refrigerant Refrigerant recovery equipment Refrigerant recovery Tool exclusive for R410A Refrigerant cylinder Refrigera
89. ilure of indoor out door unit connecting wire Defective communication circuit of branch box outdoor controller circuit board Defective communication circuit of indoor branch box controller board Noise has entered into indoor branch box branch box outdoor unit connecting wire D Check disconnection or looseness of indoor branch box branch box outdoor unit connecting wire of indoor or branch box or outdoor units Turn the power off and on again to check Replace indoor controller board or branch controller board or outdoor control ler circuit board if abnormality is displayed again Indoor branch box branch box outdoor unit communication error Transmitting error Branch box outdoor unit 1 Abnormal if 0 receiving is detected 30 times continuously though branch box outdoor controller circuit board has transmitted 1 2 Abnormal if branch box outdoor controller circuit board could not find blank of transmission path for 3 minutes Indoor branch box branch box outdoor unit connecting wire has contact failure Defective communication circuit of outdoor controller circuit board Noise has entered power supply Noise has entered Indoor branch box branch box outdoor unit connecting wire Check disconnection or looseness of indoor branch box branch box outdoor unit connect ing wire Turn the power off and on again to check Replace outdoor controller circu
90. ing of test run ON OFF and its operation mode cooling heating can be set by SW4 on the controller board of out door unit Set operation mode cooling or heating by SW4 2 Q Start test run by setting SW4 1 to ON T with the indicated operation mode of SW4 2 Finish test run by setting SW4 1 to OFF 1 sw4 Initial setting Operation mode cannot be changed by SWA 2 during test run Stop test run to change operation mode SW4 1 and restart test run by SW4 1 after ON Stop the mode is changed Cooling Test run automatically stops 2 hours later by 2 hour OFF timer function Operation Test run can be performed by the remote controller 12 Heating The remote controller display of test run by outdoor unit is the same as that of test run by remote controller If test run is set with the outdoor unit the test run is performed for all indoor units The remote controller operation becomes unavailable once the test run is set with the outdoor unit During the test run set with the outdoor unit operation on off or operation mode change cannot be performed by the remote controller and the operation relating to the test run which is made with the outdoor unit will be prior to any other commands from the remote controller Set the SW4 1 to OFF 1 to finish test run Emergency operation is not available for this model OCH480D 24 8 3 SELF DIAGNOSIS ACTION TABLE Abnormalities detected when
91. ing wires If it aims at detection of any erroneous connection be sure to carry out the test run from remote controller with reference to 1 Using remote controller Cooling operation Heating operation Note After performing the test run set SW4 1 to OFF e A few seconds after the compressor starts a clanging noise may be heard from the inside of the outdoor unit The noise is coming from the check valve due to the small difference in pressure in the pipes The unit is not faulty The test run operation mode cannot be changed by DIP switch SW4 2 during the test run To change the test run operation mode during the test run stop the test run by DIP switch SW4 1 After changing the test run operation mode resume the test run by switch SW4 1 When a test run is started by Using SW4 in outdoor unit even if it carries out stop instructions by remote controller outdoor unit does not stop A test run is not ended In this case please set SW4 in outdoor unit to off After power is supplied or after an operation stop for a while a small clicking noise may be heard from the inside of the branch box The electronic expansion valve is opening and closing The unit is not faulty Note Be sure to wait at least 3 minutes after turning on the power supply before setting SW4 1 and SW4 2 If the DIP switches are set before 3 minutes have elapsed the test run may not start 8 2 3 Test run by outdoor unit SW4 The sett
92. io OCH480D 49 The black square m indicates a switch position SW2 setting Display detail Explanation for display Unit Capacity setting display Displayed as an outdoor capacity code Capacity Code Code MXZ 8B140VA YA 25 display MXZ 8B160VA YA 28 ON The tens digit Total display for applied setting Setting details Display details H P Cooling only 0 1 Cooling only Single phase 3 phase O Single phase 2 3 phase Code display The ones digit Setting details Display details Defrosting switch 0 Normal 1 For high humidity Example MXZ 8B140VA 00 is displayed Indoor pipe temperature Liquid _ 39 to 88 39 to 88 When the temperature is 0 or less and temperature are displayed by turns Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 S S ooo Indoor pipe temperature Cond Eva 39 to 88 Indoor 1 When the temperature is 0 or less 39 to 88 temperature are displayed by turns uo and Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8
93. ion KW 80 8000 9300 256 330 39 51 37 48 36 46 48 84 4 9 85 5 0 5 0 87 5 1 88 5 1 5 2 5 3 5 3 5 4 9300 10800 291 388 45 60 42 57 41 55 9400 10900 294 392 45 60 43 57 41 55 5 6 5 6 5 7 9800 11400 304 412 47 63 44 60 43 58 5 8 100 5 9 101 5 9 102 103 10300 12000 323 432 50 66 47 63 45 61 104 6 1 105 6 2 106 10600 12300 337 442 52 68 49 64 47 62 107 10700 12400 341 445 52 68 50 65 48 63 108 10800 12500 346 448 53 69 50 65 49 63 109 10900 12700 351 455 54 70 51 66 49 64 110 64 111 6 5 112 11200 13000 36 464 56 71 53 68 51 65 113 11300 13100 371 467 57 72 54 68 52 114 11400 13200 376 470 58 72 55 69 53 115 6 7 116 6 7 117 11700 13600 392 483 60 74 57 70 55 118 119 120 121 12100 14100 414 499 64 77 60 73 58 70 122 7 1 123 12300 14300 425 505 65 78 62 74 60 71 124 12400 14400 430 508 66 78 63 74 60 71 125 7 2 126 12600 14600 442 514 68 79 64 75 62 72 127 12700 14700 448 517 69 79 65 75 63 73 128 12800 14900 454 524 70 80 66 76 64 74 129 74 130 13000 15100 466 530 72 81 68 77 65 74 131 13100 15200 472 533 72 82 69
94. istor It detects lower temperature than actual temperature 14 Disconnection or contact failure of connector 63H on outdoor controller board 15 Disconnection or contact fail ure of 63H connection 16 Defective outdoor controller board 17 Defective action of linear expansion valve 18 Malfunction of fan driving cir cuit 19 Solenoid valve SV1 per formance failure High pressure cannot be controlled by SV1 20 High pressure sensor defec tive 21 High pressure sensor input circuit defective in multi con troller board 4 5 6 7 28 1 6 Check indoor unit and repair defect 7 Check if stop valve is fully open 8 Check piping and repair defectives 9 12 Check outdoor unit and repair defect 13 Check the detected temperature of outside temperature thermistor on LED display 14 16 Put the power off and check F5 is displayed when the power is put again When F5 is displayed refer to Judgment and action for F5 17 Check linear expansion valve Refer to 8 6 HOW TO CHECK THE PARTS 18 Replace outdoor controller board 19 Check the solenoid valve performance 20 Check the high pressure sensor 21 Check the high pressure sensor Abnormal point and detection method Case Judgment and action 1 High discharging temperature Abnormal if compressor temperature thermistor TH4 exceeds 125 C or 110 C continuously for 5 minutes Abnormal if pressure detected by hi
95. it board if abnormality is displayed again Non defined check code This code is displayed when non defined check code is received OCH480D Noise has entered transmission wire of remote controller Noise has entered Indoor branch box branch box outdoor unit connecting wire Model name of remote controller is PAR S25A 33 C Turn the power off and on again to check Replace indoor controller board or branch controller board or outdoor controller circuit board if abnormality is displayed again Replace remote controller with MA remote controller Check code Abnormal point and detection method Case Judgment and action Serial communication error Abnormal if serial communication between outdoor controller circuit board and outdoor power circuit board is defective Breaking of wire or contact failure of connector CN2 between the outdoor controller circuit board and the outdoor power circuit board Breaking of wire or contact failure of connector CN4 between the outdoor controller circuit board and the outdoor power circuit board Defective communication circuit of outdoor power circuit board Defective communication circuit of outdoor controller circuit board for outdoor power circuit board Check connection of each connector CN2 and 4 between the outdoor controller circuit board and the outdoor power circuit board Replace outdoor power circuit board
96. jr Front piping hole m e 92 Rear piping hole Knockout 92 PRU EM SIS 65 Knockout 65 OCH480D 6 WIRING DIAGRAM MXZ 8B140VA MXZ 8B160VA d Ld I TA 63H 63L 63HS TH3 TH4 A C B f The black square indicates SYMBOL NAME switch position TB1 Terminal Block Power Supply Branch Box 1 4g 33 CNF1 2658 58 EJ ES EJ Motor for Compressor 5 m are T p 8 SEE SEE MF1 MF2 Fan Motors V RED WHT WHT WHT RED Em 2154 Solenoid Valve Four Way Valve E
97. l capacity under the stated conditions x Total capacity at the rated time 3 Capacity correction factor curve Fig 4 1 Fig 4 2 Cooling capacity Cooling input jum 12 FA 16 9 12 2 10 gt Ld a 0 8 1 2 0 8 2 20 9 16 Indoor intake air wet bulb temperature lt C W B Indoor intake air wet bulb temperature lt C W B 065 7 0 5 10 15 20 25 30 35 40 46 045 0 5 16 0 28 30 35 40 46 Outdoor intake air dry bulb temperature C D B gt Outdoor intake air dry bulb temperature C D B gt Fig 4 3 Fig 4 4 Heating capacity Heating input 14 g 10 3 S S g 08 5 ae T os Indoor intake air dub temperature lt C D B gt Indoor intake bulb temperature lt CD B gt amp FH
98. ls A Warning Do not use the air conditioner if the insulation resistance is less than 1 MO Insulation resistance After installation or after the power source to the unit has been cut for an extended period the insulation resistance will drop below 1 MO due to refrigerant accumulating in the compressor This is not a malfunction Perform the following procedures 1 Remove the wires from the compressor and measure the insulation resistance of the compressor 2 If the insulation resistance is below 1 the compressor is faulty or the resistance dropped due to the accumulation of refrigerant in the compressor 3 After connecting the wires to the compressor the compressor will start to warm up after power is supplied After supplying power for the times indicated below measure the insulation resistance again The insulation resistance drops due to accumulation of refrigerant in the compressor The resistance will rise above 1MO after the compressor is warmed up for 4 hours The time necessary to warm up the compressor varies according to atmospheric conditions and refrigerant accumulation To operate the compressor with refrigerant accumulated in the compressor the compressor must be warmed up at least 12 hours to prevent breakdown 4 the insulation resistance rises above 1 the compressor is not faulty A Caution The compressor will not operate unless the power supply phase connection is correct Turn on the power
99. mperature are displayed by turns Example When 15 0 5 secs 0 5 secs 2 secs d 15 gt 4 Indoor unit 1 0 Indoor unit 2 1 Indoor unit 3 0 Indoor unit 4 1 0 1 0 1 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 ojo og Indoor pipe temperature Eva 39 to 88 on error occurring When the temperature is 0 C or less and 39 to 88 temperature are displayed by turns Example When 15 0 5 secs 0 5 secs 2 secs 15 gt Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 o l gt ojo 5 S S S oo Outdoor pipe temperature 2 phase 39 to 88 TH6 on error occurring When the temperature is 0 C or less and 39 to 88 temperature are displayed by turns Example When 15 0 5 secs 0 5 secs 2 secs T gt 15 1 J Outdoor outside temperature TH7 on 39 to 88 error occurring When the temperature is 0 C or less 39 to 88 temperature are displayed by turns Example When 15 0 5 secs 0 5 secs 2 secs 215 gt
100. n the outdoor power circuit board Refer to 8 7 TEST POINT DIAGRAM Check connection of reactor DCL Check connection of L1 and L2 on the active filter module ACTM a Check connection of outdoor noise filter circuit board b Replace outdoor noise filter circuit board Refer to 8 7 TEST POINT DIAGRAM amp Replace outdoor power circuit board C Replace controller board When items above are checked but the units cannot be repaired F3 5202 63L connector open Abnormal if 63L connector circuit is open for 3 minutes continuously after power sup ply 63L Low pressure switch Disconnection or contact failure of 63L connector on outdoor controller circuit board Disconnection or contact failure of 63L 63L is operating due to refriger ant leakage or defective parts Defective outdoor controller circuit board Check connection of 63L connector on outdoor controller circuit board Refer to 8 7 TEST POINT DIAGRAM Check the 63L side of connecting wire Check refrigerant pressure Charge additional refrigerant Check continuity by tester Replace the parts if the parts are defective Replace outdoor controller circuit board 63H connector open Abnormal if 63H connector circuit is open for 3 minutes continuously after power sup ply 63H High pressure switch Disconnection or contact failure of 63H connector on outdoor controller circuit board 2 Disconnec
101. nal circuit in outdoor power circuit board D Check the field facility for the power supply Check earth wiring Check CN2 wiring 4 Replace outdoor controller circuit board Replace outdoor power circuit board PFC IGBT error Undervoltage When Compressor is running DC bus voltage stays at 310V or lower for consecutive 10 seconds V model only Incorrect switch settings on the outdoor controller circuit board for model select Defective outdoor power circuit board Defective outdoor controller circuit board Correction of a model select Replace outdoor power circuit board Replace outdoor controller circuit board Compressor overcurrent interruption When compressor locked Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating Stop valve is closed Decrease of power supply voltage Looseness disconnection or converse of compressor wiring connection Defective compressor Defective outdoor power board D Open stop valve Check facility of power supply Correct the wiring U V W phase to compressor Refer to 8 7 TEST POINT DIAGRAM Check compressor Refer to 8 6 HOW TO CHECK THE PARTS Replace outdoor power circuit board Current sensor error Abnormal if current sensor detects 1 5A to 1 5A during compressor operation This error is ignored in case of test run mode
102. nected to C e the system OCH480D 59 11 3 INCORRECT SYSTEMS 11 3 1 Group operation by single remote controller OC BC 3 branch type A B C PoP I m v4 TR X C Plural indoor units cannot be operated by a single remote controller 11 3 2 Group operation between different refrigerant systems OC OC BC 3 branch type BC 3 branch type A B C A B C E i x S OM Ic IC 1 i L RC Re Different refrigerant systems cannot be connected together 11 3 3 Connection of M NET adapter to outdoor unit controller gt lt 77 50 etc _ o M NET L Power supply unit A B C IC IC IC RC adapter cannot be connected to an outdoor unit OCH480D 60 12 REFRIGERANT PIPING TASK 12 1 ADDITIONAL REFRIGERANT CHARGE Outdoor unit as Branch box Indoor unit 1 Although two refrigerant pipes are used between the branch box and the Y shape connecti
103. ng Branch box m In case of using 2 branch boxes 2 branches pipe joint optional parts A A Branch box 1 m Installation procedure 2 branch pipe joint Refer to the installation manuals of MSDD 50AR E and MSDD 50BR E OCH480D 11 3 SPECIFICATIONS MXZ 8B140VA MXZ 8B140YA kcal h kW x 860 MXZ 8B1 60VA MXZ 8B1 60YA Conversion formula Btu h kW x 3412 m min 35 31 MXZ 8B140VA MXZ 8B160VA MXZ 8B140YA MXZ 8B160YA Rated Cooling capacity 14 0 15 5 14 0 15 5 Rated power consumption 1 3 86 4 71 3 86 4 71 Operating current 1 17 62 16 85 16 15 21 63 20 69 19 82 5 93 5 63 5 43 7 24 6 87 6 63 Operating power factor 1 99 6 99 0 98 9 98 9 Starting current Outdoor unit 4 Rated Heating capacity 16 0 18 0 16 0 18 0 Rated power consumption 1 3 87 4 77 3 87 4 77 Operating current 1 17 68 16 91 16 21 21 90 20 95 20 08 5 95 5 65 5 44 7 32 6 95 6 70 Operating power factor 1 99 5 99 0 98 9 99 0 Starting current Outdoor unit 14 7 Please refer to 9 ELECTRICAL WIRING Max current Outdoor unit only 29 5 13 Power supply phase cycle voltage Single 50Hz 220 230 240V 3 phase 50Hz 380 400 415V External finish Munsall 3Y 7 8 1 1 Refrigerant control Linear Expansion Valve In branch box Compressor Hermetic Model Motor output 2 9 3 3 2 9 3 3 Starter type Line start Protection devices HP switc
104. nt charge Tool exclusive for RA10A x x x Applied oil Apply to flared section Ester oil and alkylbenzene oil minimum amount Ester oil O Alkylbenzene oil minimum amount Safety charger Prevent compressor malfunction when charging refrigerant by spraying liquid refrigerant Tool exclusive for R410A x Charge valve Prevent gas from blowing out when detaching charge hose Tool exclusive for R410A x Vacuum pump Vacuum drying and air purge Tools for other refrigerants can be used if equipped with adap ter for reverse flow check A Usable if equipped with adapter for rever se flow A Usable if equipped with adapter for rever se flow Flare tool Flaring work of piping Tools for other refrigerants can be used by adjusting flaring dimension A Usable by adjusting flaring dimension A Usable by adjusting flaring dimension Bender Bend the pipes Tools for other refrigerants can be used Pipe cutter Cut the pipes Tools for other refrigerants can be used Welder and nitrogen gas cylinder Weld the pipes Tools for other refrigerants can be used Refrigerant charging scale Refrigerant charge Tools for other refrigerants can be used Vacuum gauge or thermis tor vacuum gauge and vacuum valve Check the degree of vacuum Vacuum vale prevents back flow of oil and refri gerant to thermistor vacuum gauge Tools for other refri
105. o keep the R410A concentration specified by ISO 5149 1 as follows Maximum concentration Maximum refrigerant concentration of R410A of a room is 0 44 kg m accordance with ISO 5149 1 To facilitate calculation the maximum concentration is Indoor unit expressed in units of kg m kg of R410A per m Maximum concentration of R410A 0 44kg m ISO 5149 1 b There are partitions but there are openings that allow Outdoor unit the effective mixing of air Direction _ of refrigerant flow Branch box Branch box Outdoor unit situation in which there are no door openings or in which there are open ings above and below doors that occupy at least 0 15 of the floor area Indoor unit Indoor unit Opening All refrigerant of this system will leak out to this room if there is leakage at this indoor unit 12 3 2 Confirming procedure of R410A concentration Follow 1 to 3 to confirm the R410A concentration and take appropriate treatment if necessary c If the smallest room has mechanical ventilation appa ratus that is linked to a household gas detection and alarm device the calculations should be performed for the second smallest room 1 Calculate total refrigerant amount by each refrig Branch box erant system Outdoor unit Total refrigerant amount is precharged refrigerant at ex factory plus additional charged amount at field installation Ventilation apparatus
106. o remove thermistor Outdoor 5 Removing the thermistor Outdoor TH7 Photo 6 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the connector TH7 red on the controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 5 5 Pull out the thermistor lt Outdoor gt TH7 from the sensor holder Note In case of replacing thermistor lt Outdoor gt TH7 replace it together with thermistor lt Outdoor 2 phase Lead wire of thermistor Sensor holder pipe TH6 since they are combined together Refer Outdoor TH7 to No 4 above to remove thermistor Outdoor 2 phase pipe 6 Removing the thermistor Outdoor pipe TH3 and Photo 7 thermistor Compressor TH4 Thermistor 1 Remove the service panel See Photo 1 lt Outdoor pipe gt TH3 2 Disconnect the connectors TH3 white and TH4 white on the controller circuit board in the electrical parts box 3 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 5 4 Pull out the thermistor lt Outdoor pipe gt TH3 and thermistor lt Compressor gt TH4 from the sensor holder Thermistor Compressor lt Compressor gt TH4 MC OCH480D 65 OPERATING PROCEDURE PHOTOS 7T Removing the solenoid valve coil 4 way valve 2154 1 Remove the servic
107. of units wire unit connecting wire of indoor and outdoor Outdoor branch box controller circuit board units can automatically check the number of Before connecting P100 indoor unit s check connected indoor units Abnormal if the the requirements described in 9 2 WIRING number cannot be checked automatically TO P100 INDOOR UNITS due to miswiring of indoor branch box branch box outdoor unit connecting wire Diameter or length of indoor Check diameter and length of indoor branch and etc after power is turned on for 4 min branch box branch box out box branch box outdoor unit connecting wire utes door unit connecting wire is out Total wiring length 55 m outdoor branch box of specified capacity including wiring connecting each branch box There are 9 or more indoor unit and between branch box and outdoor units in the system unit There are 3 or more branch Also check if the connection order of flat boxes in the system cable is S1 S2 S3 More than two P100 indoor units are connected to the If the error EA is detected check the branch box number of the indoor units the branch box and P100 indoor unit s in the system Defective transmitting receiving Turn the power off once and on again to circuit of outdoor branch box check controller circuit board Replace outdoor controller circuit board Defective transmitting receiv branch box controller board indoor controller ing circuit of branch box indoor board
108. on environment refrigerant amount weather when the trouble occurred matters related to wiring etc GReset check code logs and restart the unit after finishing service GThere is no abnormality concerning of parts such as electrical component controller board remote controller etc The trouble is not reoccurring the abnormal symptom 2 trouble shooting and ascertain the cause of the trouble according to 8 4 TROUBLESHOOTING OF PROBLEMS Not logged GContinue to operate unit for the time being if the cause is not ascertained There is no abnormality concerning of parts such as electrical component controller board remote controller etc OCH480D 22 8 2 CHECK POINTS FOR TEST RUN 8 2 1 Before test run e Turn on the main power switch more than 12 hours before starting operation Starting operation just after turning on the power switch can severely damage the internal parts Keep the main power switch turned on during the operation season e After completing installation and the wiring and piping of the indoor and outdoor units check for refrigerant leakage loose ness in the power supply or control wiring wrong polarity and no disconnection of one phase in the supply e Use a 500 volt M ohm tester to check that the resistance between the power supply terminals and ground is at least 1 e Do not carry out this test on the control wiring low voltage circuit termina
109. on pipe when connecting the P100 indoor unit calculate the piping lengths using only the length of one pipe a Q Indoor unit P100 type Y shape connection pipe 1 1 2 1 2 Total piping length b1 b2 1 a2 a3 a4 a5 a7 a8 115m Permissible Farthest piping length L b2 a8 70m b2 55m a8 15m length Piping length between outdoor unit and one way branch boxes b1 b2 55m Farthest piping length after branch box 1 8 x 15m Total piping length between branch boxes and indoor units In indoor outdoor section H 2 H 3 30m In case of that outdoor unit is set higher than indoor unit Permissible H 20m In case of that outdoor unit is set lower than indoor unit a In branch box indoor unit section h1 h1 h2 x 15m In each branch unit h2 h2 3 15m In each indoor unit h3 h3 x 12m 151 a1 61 2 b1 a3 b1 a4 51 5 62 b2 a7 2 8 15 1 2 a3 4 5 a6 7 a8 lt 60m Number of bends 2 Branch box should be placed with in the level between the outdoor unit and indoor units Additional charging is not necessary for this unit if the total pipe length 61 b2 a1 a2 a3 a4 a5 a7 a8 does not exceed 40 m the total pipe length exceeds 40 m charge the unit with additional R410A refrigerant according to the pe
110. onnect to the out is input Connect to the Connect to DCL door controller circuit terminal block TB1 board CNAC 42 Outdoor power circuit board MXZ 8B140YA MXZ 8B160YA CN5 Detection of primary current Connect to the outdoor noise filter circuit board CNCT CN4 Connect to the outdoor controller circuit board CN4 CN7 Usually they are in a state of being short circuited if they are broken Note The marks L1 12 13 N1J 21 P1 P2 U V and W shown in the diagram are not actually printed on the board Brief Check of POWER MODULE Measure the resistance in the following points connectors etc If they are short circuited it means that they are broken 1 Check of POWER MODULE D Check of DIODE circuit 12 1 1 3 1 E17 INT 12 1 E3 1 Check of IGBT circuit 2 0 2 P2 IW IN2 U J IN2 IV 2 z Connect to the outdoor converter circuit board CN7 CN2 Connect to the outdoor controller circuit board CN2 D G Power circuit board Transmitting signal to the controller board 0 5V DC 9 9 Zero cross signal 0 5V DC Not used 9 O 0 0 0 6 9 8 16V DC Q 6 16V DC
111. or indoor power board if abnormality controller board occurs again Defective branch box indoor power board Noise has entered into power 9 Check transmission path and remove the supply or indoor branch box cause branch box outdoor unit con necting wire Note The descriptions above are for EA Eb and EC Miswiring of indoor branch box branch O Contact failure or miswiring of box outdoor unit indoor branch box branch box connecting wire converse wiring or dis X outdoor unit connecting wire connection Diameter or length of indoor Outdoor branch box controller circuit board branch box branch box out can automatically set the unit number of door unit connecting wire is out indoor units of specified capacity Abnormal if the indoor unit number can Defective transmitting receiving not be set within 4 minutes after power circuit of outdoor branch box on because of miswiring converse wiring controller circuit board or disconnection of indoor branch box Defective transmitting receiv branch box outdoor unit connecting wire ing circuit of indoor branch box controller board Defective indoor branch box power board Noise has entered into power supply or indoor branch box branch box outdoor unit con necting wire Start up time over Contact failure of indoor The unit cannot finish start up process branch box branch box outdoor within 4 minutes after power on unit connecting
112. or short circuit Too many indoor units branch box are in the system Radiator panel temperature fault U5 Mis wiring of indoor branch box branch box ouldoor unit connecting wire converse wiring or disconnection Eb Abnormality in outdoor fan motor 08 Startup time over Ec Voltage fault current sensor fault ug Communication error except for outdoor unit 7 Forced compressor stop Combination undefined error EE EF Overlap malfunction of drain pump in indoor unit Serial communication error Ed and linear expansion valve in branch box Cautions when Servicing AAWARNING When the main supply is turned off the voltage 540 V in the main capacitor will drop to 20 V in approx 5 minutes input voltage 380 V when servicing make sure that LED on the outdoor circuit board goes out and then wait for at least 5 minute Components other than the outdoor board may be faulty Check and take corrective action referring to the service manual Do not replace the outdoor board without checking OCH480D 19 7 NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION REFRIGERANT SYSTEM DIAGRAM MXZ 8B140VA MXZ 8B140YA MXZ 8B160VA MXZ 8B160YA Condenser evaporator High pressure sensor temperature thermistor Room temperature discharge pressure sensor TH5 or RT12 63HS thermistor TH1 or RT11 Check valve 4 way valve Bypass valve SV2 Bypass valve SV1 High Pressure Thermistor TH7
113. or upward airflow e Obstacles at rear and sides only Fig 2 6 e Obstacles at front only Fig 2 7 When using an optional air outlet guide the clearance is 500 mm or more e Obstacles at front and rear only Fig 2 8 When using an optional air outlet guide the clearance is 500 mm or more e Obstacles at rear sides and above only Fig 2 9 Do not install the optional air outlet guides for upward airflow unit mm OCH480D 9 SSS 3 When installing multiple outdoor units Leave 10 mm space or more between the units e Obstacles at rear only Fig 2 10 e Obstacles at rear and above only Fig 2 11 No more than 3 units must be installed side by side In addition leave space as shown Do not install the optional air outlet guides for upward airflow e Obstacles at front only Fig 2 12 When using an optional air outlet guide the clearance is 1000 mm or more e Obstacles at front and rear only Fig 2 13 When using an optional air outlet guide the clearance is 500 mm or more e Single parallel unit arrangement Fig 2 14 When using an optional air outlet guide installed for upward airflow the clearance is 1000 mm or more e Multiple parallel unit arrangement Fig 2 15 When using an optional air outlet guide installed for upward airflow the clearance is 1500 mm or more e Stacked unit arrangement Fig 2 16 The units can be stacked up to 2 units high No more than 2 stacked units mu
114. out 3 4 dB The low noise mode will be activated when a commercially available timer or the contact input of an ON OFF switch is added to the CNDM connector optional parts on the control board of the outdoor unit The capacity may be insufficient according to the outdoor temperature and conditions etc D Complete the circuit as shown when using the external input adapter PAC SC36NA Optional parts 20 ___ 0 amp Remote control panel Procure locally i i i 1 i Relay circuit Max 10m i Oi External input adapter PAC SC36NA Orange i sw i i x i i Outdoor unit control board Brown i i 2 O Replay power supply Red I i i i ero i MM i opi Fig 8 1 8 5 2 Demand function on site modification Fig 8 2 e is possible to reduce electricity consumption within a range from 0 to 100 by performing the following on site installation The demand function can be enabled by adding a commercially available input contact point ON OFF switch to the CNDM connector the contact point demand input optional parts Incorporate the Adapter for external input PAC SC36NA into the circuit as shown in the diagram below By switching SW7 1 on the control circuit board for the outdoor unit the following power consumption restrictions compared to rated power can be set P
115. ower consumption when SW2 is on 096 Forced compressor stop 50 e __ 2 8 Remote control panel Procure locally i i i Relay circuit Max 10m MON i I i l External input adapter PAC SC36NA Orange i i i i Outdoor unit control board Brown i i i i i Replay power suppl Red i sw2 i x play p pply ee mm ME E Mc Fig 8 2 8 5 3 Error and compressor operation monitoring function CN51 Distant control board Lamp power supply irc eee EET Relay circuit Procure locally External output adapter PAC SA88HA E Max 10m CN51 9 Outdoor unit control board lt lt Li TM e 2 L1 Error display lamp L2 Compressor operation lamp i i i X Y Relay Coil standard of 0 9W or less for DC 12V M s cs s X Y Relay DC1mA Fig 8 3 8 5 4 Auto change over Operation mode locking function by external signal CN3S wass SS _ j E Remote control panel Relay power supply i Relay circuit Procure locally 5 1 i x i 1 qi CN3S External input adapter PAC SC36NA Max 10m i t i Outdoor unit control board
116. r Check the internal pressure Check the high pressure sensor Check the controller board Abnormal temperature of heatsink Abnormal if heatsink thermistor TH8 detects temperature indicated 85 C The outdoor fan motor is locked Failure of outdoor fan motor Air flow path is clogged Rise of ambient temperature Defective thermistor Defective input circuit of outdoor power circuit board Failure of outdoor fan drive circuit Check outdoor fan Check air flow path for cooling Check if there is something which causes temperature rise around outdoor unit Upper limit of ambient temperature is 46 C Turn off power and on again to check if U5 is displayed within 30 minutes If U4 is displayed instead of U5 follow the action to be taken for U4 Check resistance value of thermistor TH8 temperature by microprocessor Thermistor TH8 Refer to 8 6 HOW TO CHECK THE PARTS SW2 on A Control Service Tool Refer to 8 8 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS amp Replace outdoor power circuit board Replace outdoor controller circuit board U6 4250 Abnormality of power module Check abnormality by driving power module in case overcurrent is detected UF or UP error condition OCH480D Outdoor stop valve is closed Decrease of power supply voltage Looseness disconnection or converse of compressor wiring connection Defecti
117. r unit to 0 1A only if operation frequency is more than or equal to 40Hz or compressor current is more than or equal to 6A L1 phase open Y model Disconnection or loose connection between TB1 and outdoor noise filter circuit board Y model Disconnection or loose connection of CN5 on the outdoor power circuit board CNCT on the outdoor noise filter board Defective ACCT AC current trans on the outdoor noise filter circuit board Y model Defective input current detection circuit in outdoor power circuit board Defective outdoor controller circuit board Check the field facility for the power supply Y model Check the wiring between TB1 and out door noise filter circuit board Y model Check CN5 CNCT wiring Y model Replace outdoor noise filter circuit board Y model Replace outdoor power circuit board Replace outdoor controller circuit board Abnormal power synchronous signal No input of power synchronous signal to power circuit board Power synchronous signal of 44 Hz or less or 65 Hz or more is detected on power circuit board Distortion of power source voltage noise superimposition Disconnection or loose connection of earth wiring Disconnection or loose connection of CN2 on the outdoor power circuit board controller circuit board Defective power synchronous signal circuit in outdoor controller circuit board Defective power synchronous sig
118. ressure SEZ KA KC25 35 50 60 7 1VA Ceiling SEZ KD25 35 50 60 71VA L concealed Middle static pressure PEAD RP50 60 71 100JA L Q UK High static pressure PEA RP71EA RP100EA2 MCFZ GA35 50 60VA 2 by 2 type SLZ KA25 35 50VA L 4 way Standard PLA RP35 50 60 71AA UK BA UK ceiling cassette PLA RP71BA2 UK PLA RP100BA BAS3 Floor standing MFZ KA25 35 50VA MFZ KJ25 35 50VE 1 way ceiling cassette MLZ KA25 35 50VA NOTE The lineup of a connectable indoor unit depends on a district areas country When connectiing the indoor unit with the number 100 use the PAC AK52YP E Y shape connection pipe Optional part Branch box 5 2 Number of branches 5 branches 3 branches Indoor unit that MAX 5 units MAX 3 units can be connected Max 2 branch boxes can be connected to 1 outdoor unit 2 branch pipe joint Optional parts In case of using 1 branch box No need mounted Model name Connection method In case of using 2 branch boxes MSDD 50AR E flare MSDD 50BR E brazing According to the connection method you can choose the favorite one Optional accessories of indoor units and outdoor units are available OCH480D 5 ss 2 2 SYSTEM OUTLINE The additional connection of the Branch Box together with employment of the compact
119. rmistors the temperatures by referring to the section of Monitoring function for outdoor unit Convert modes by SW2 GReplace the whole outdoor controller board Short detection TH3 Thermistor Outdoor pipe 40 C or below 90 C or above Thermistor Outdoor 40 C or below 90 C or above TH8 Thermistor lt Heatsink gt 27 C or below 102 C or above Branch box unit TH A E Thermistor Room A E 2 High Pressure sensor 63HS abnormality When detected pressure in high pressure sensor is 1MPa or less during the opera tion the compressor stops and restarts operation in 3 minutes When the detected pressure is 1MPa or less at just before of restarting the com pressor stops abnormally In this time lt 04 gt is displayed For 3 minutes after the compressor stops the unit delays to abnormal stop Then the outdoor unit address No and check delay code lt U4 gt blinks alternately on the 7 SEG digital display For 3 minutes after starting compres Sor for defrosting or for 3 minutes after recovery from defrosting abnormality is not determined as abnormality Gas pipe temperature detection 40 C or below High pressure sensor failure Internal pressure decrease by gas leakage Connector contact failure dis connection Controller board input circuit failure 90 or above Check the high pressure senso
120. rmitted pipe lengths in the chart on the next page After charging the unit with refrigerant note the added refrigerant amount on the service label attached to the unit Refer to the installation manual for more information OCH480D 61 Table 1 gt Total piping length 61 b2 1 a2 a3 a4 a5 a7 a8 40m or less Additional refrigerant charging amount Okg no need Reference for service 8 5kg The amount of refilling refrigerant charge 8 5 0 If connecting an indoor unit with 9 52 liquid pipes model number 71 or more for M and S series and model number 60 or more for P series the additional refrigerant charging amount in Table 1 must be corrected add the following R value from the value given in Table 1 Additional refrigerant charging correction amount R 0 01 kg m x 49 52 branch pipe liquid pipe total length m Example b1 20m b2 25m Indoor unit A 9 52 liquid pipe Indoor unit B 6 35 liquid pipe Indoor unit C 6 35 liquid pipe Indoor unit D 29 52 liquid pipe Total piping length b1 b2 a1 a2 a7 95m According to Table 1 the additional refrigerant charging amount is 3 2kg Because indoor units with 49 52 liquid pipes are connected indoor units A and D in this example the additional refrigerant charging amount must be corrected Additional refrigerant charging correction amount 0 01 kg m x 49 52 br
121. ssor over current shutoff Start up locked UF Branch box outdoor communication error Signal receiving error Outdoor unit E8 Current sensor fault UH Indoor branch box communication error Signal receiving error Branch box Compressor overcurrent shutoff fault UP Branch box outdoor communication error Transmitting error Outdoor unit 9 Compressor thermistor TH4 open or short circuit U3 Indoor branch box communication error Transmitting error Branch box Outdoor unit thermistors TH3 TH6 TH7 and TH8 63HS and branch dox U4 Mis Wiring of indoor branch box branch box outdoor unit connecting wire EA thermistors open or short circuit many indoor units branch box are in the system Radiator panel temperature fault 05 Mis wiring of indoor branch box branch box outdoor unit connecting wire converse wiring or disconnection Eb Abnormality in outdoor fan motor U8 Startup time over Ec Voltage fault current sensor fault 09 Communication error except for outdoor unit E0 E7 Forced compressor stop PA Combination errer undefined error EE EF Overlap malfunction of drain pump in indoor unit Serial communication error Ed and linear expansion valve in branch box Cautions when Servicing A WARNING When the main supply is turned off the voltage 340 V in the main capacitor will drop to 20 V in approx 2 minutes input voltage 240 V when servicing make sure that LED on the outdoor circuit board goes out an
122. st be installed side by side In addition leave space as shown unit mm OCH480D 10 2 5 SIMPLIFIED PIPING SYSTEM Piping connection size The piping connection size differs according to the type and capacity of indoor units Match the piping connection size of branch box with indoor unit If the piping connection size of branch box does not match the piping connection size of Gas mm indoor unit use optional different diameter deformed joints to the branch box side Connect deformed joint directly to the branch box side Liquid mm For P100 indoor units the individual Y shape connection pipes use 2 ports on the branch box as shown below Branch box H Branch box H Y shape connection pipe Indoor unit b d Y shape connection pipe Port A EB waw P100 Port A mma 8 90 mab ica Port B 9 mma mm Port EG mma mm J Y shape connection pipe Pert 18 Port E a Br crB mmm Port D Port D EF mam Ex Port E Port E g g To connect a single P100 indoor unit use port A and port To connect two P100 indoor units use port A and port B and B on the branch box port C and port D on the branch box Flare connection employed No brazing m In case of using 1 branch box Flare connection employed No brazi
123. t cable is S1 S2 S3 If the error EA is detected check the number of the indoor units the branch box and P100 indoor unit s in the system Defective transmitting receiving 9 9 Turn the power off once and on again to circuit of outdoor branch box check controller circuit board Replace outdoor controller circuit board Defective transmitting receiv branch box controller board indoor controller ing circuit of branch box indoor board or indoor power board if abnormality controller board occurs again Defective branch box indoor power board Noise has entered into power Check transmission path and remove the supply or indoor branch box cause branch box outdoor unit con necting wire Note The descriptions above are for EA Eb and EC OCH480D 27 ss lt Abnormalities detected while unit is operating gt Check code Abnormal point and detection method Case Judgment and action 1 High pressure switch 63H operated Abnormal if high pressure switch 63H oper ated during compressor operation 4 15 MPa 63H High pressure switch 2 High pressure High pressure sensor 63HS detect When high pressure sensor detects 4 31MPa or more or over 4 15MPa for 3 minutes 1st detection during the compressor operation the compressor stops and restarts opera tion in 3 minutes When the sensor detects 4 31MPa or more or over 4 15MPa for 3 minutes again
124. the power is put on Check code Abnormal point and detection method Case Note 1 Refer to indoor unit section for code P and code E Judgment and action No voltage is supplied to termi nal block TB1 of outdoor unit Power supply breaker is turned off b Contact failure or disconnec tion of power supply terminal C Open phase L or N phase Electric power is not charged to power supply terminal of out door power circuit board Contact failure of power supply terminal b Open phase on the outdoor power circuit board Disconnection of connector SC R or SC S Electric power is not supplied to outdoor controller circuit board Disconnection of connector CNDC Disconnection of reactor DCL Disconnection of outdoor noise filter circuit board or parts fail ure in outdoor noise filter circuit board Defective outdoor power circuit board Defective outdoor controller circuit board Check following items a Power supply breaker b Connection of power supply terminal block TB1 Connection of power supply terminal block TB1 Check following items a Connection of power supply terminal block TB1 b Connection of terminal on outdoor power circuit board Disconnection of connector SC R or SC S Refer to 8 7 TEST POINT DIAGRAM Check connection of the connector CNDC on the outdoor controller circuit board Check connection of the connector CNDC o
125. tion Bolt M10 MODEL A 1 MXZ 8B140VA 160VA 1079 MXZ 8B140YA 160YA 930 E 2 12 36 Oval holes Foundation Bolt M10 770 Air Discharge EISE 56 950 Terminal connection Rear Air Intake je 322 gt Power supply wiring Side Air Intake Handle for moving Earth terminal Right Indoor Outdoor wiring a y n AAAA Service panel Handle for moving Handle for moving 5 Handle for moving _ Q Handle for moving i f di Air Intake 9 x Y al Front piping cover Rear piping cover 71 Bottom piping hole Knock Out Piping Knockout Hole Details Power supply wiring hole Right piping hole 2 627Knockout Power supply wiring hole Knockou Right trunking hole EZ 2 27Knockout Knockout Power supply wiring hole Front trunking hole 40 45 40 2 d27Knockout Knockout to Rear trunking hole S Knockout lol 2 2 8 9 NN 292 1 N 1
126. tion or contact failure of 63H 63H is operating due to defec tive parts 4 Defective outdoor controller circuit board Check connection of 63H connector on outdoor controller circuit board Refer to 8 7 TEST POINT DIAGRAM Check the 63H side of connecting wire Check continuity by tester Replace the parts if the parts are defective Replace outdoor controller circuit board 2 connector open Abnormal if both 63H and 63L connector circuits are open for 3 minutes continuously after power supply 63H High pressure switch 63L Low pressure switch OCH480D Disconnection or contact failure of connector 63H 63L on outdoor controller circuit board Disconnection or contact failure of 63H 63L 63H and 63L are operating due to defective parts Defective outdoor controller board Check connection of connector 63H 63L on outdoor controller circuit board Refer to 8 7 TEST POINT DIAGRAM Check the 63H and 63L side of connecting wire Check continuity by tester Replace the parts if the parts are defective Replace outdoor controller circuit board 25 Check code Abnormal point and detection method Case Judgment and action Indoor branch box branch box outdoor Contact failure or miswiring of Check disconnection or looseness or polar unit connector miswiring excessive indoor outdoor unit connecting ity of indoor branch box branch box outdoor number
127. ty in outdoor fan motor Voltage fault current sensor fault N F Forced compressor stop Overlap malfunction of drain pump in indoor unit and linear expansion valve in branch box Contents to be inspected When power is turned on 63L connector red is open 63H connector yellow is open 2 connectors 63H 63L are open Branch box outdoor communication error Signal receiving error Outdoor unit Indoor branch box communication error Signal receiving error Branch box Branch box outdoor communication error Transmitting error Outdoor unit Indoor branch box communication error Transmitting error Branch box Miswiring of indoor branch box branch box outdoor unit connecting wire Too many indoor units branch box are in the system Miswiring of indoor branch box branch box outdoor unit connecting wire converse wiring or disconnection Startup time over Communication error except for outdoor unit Combination error undefined error Serial communication error OCH480D 47 a The black square m indicates a switch position SW2 setting Display detail Explanation for display Pipe temperature Liquid TH3 40 to 90 40 to 90 When the coil thermistor detects 0C or below and temperature are displayed by turns Example When 10 0 5 secs 0 55 2 secs
128. uare indicates a switch position GRNIYLW MODEL swe 1 12345678 ABE n 12345678 160 taut E 2 ACL4 IH rr Operation Inspection Display LED on the controller board display the operation and inspection status as follows If LED does not light it indicates that no power is supplied to the board Details Code Details Code s Compressor temperature fault U2 Power tumed sev Gls Low discharge superheating fault Erroneous connection of refrigerant pipes or U7 Normal status Operation status display the connecting wires such as C5 H7 High pressure fault 63H operates 01 Faulty status 3L connector red is open F3 Low pressure fault 63L operates UL blinking 63H connector yellow is open F5 Abnormality of power moduls U6 2 connectors 63H 63L are open 9 Compressor over current shutoff Start up locked Branch box outdoor communication error Signal receiving error Outdoor unit E8 Current sensor fault P B UH Indoor branch box communication error Signal receiving error Branch box Compressor overcurrent shutoff fault UP Branch box outdoor communication error Transmitting error Outdoor unit 9 Compressor thermistor open short circuit U3 Indoor branch box communication error Transmitting error Branch box Outdoor unit thermistors TH3 TH6 TH7 63HS and branch dox U4 Mis Wiring of indoor branch box branch box outdoor unit connecting wire EA thermistors open
129. untermeasures must be taken at installation to protect the outdoor unit from malfunc tion caused by snow e Select a location permitting easy wiring and pipe access to the power source and indoor unit e Drain water must be drained freely during operation Check for draining 2 4 2 Ventilation and service space 1 Windy location installation When installing the outdoor unit on a rooftop or other location unprotected from the wind situate the air outlet of the unit so that it is not directly exposed to strong winds Strong wind entering the air outlet may impede the normal airflow and a mal function may result The following shows 3 examples of precautions against strong winds e Face the air outlet towards the nearest available wall about 50 cm away from the wall Fig 2 1 e Install an optional air guide if the unit is installed in a location where strong winds from a typhoon etc may directly enter the air outlet Fig 2 2 Air guide e Position the unit so that the air outlet blows perpendicularly to the seasonal wind direction if possible Fig 2 3 Wind direction OCH480D 8 2 When installing a single outdoor unit Minimum dimensions are as follows except for Max meaning Maximum dimensions indicated Refer to the figures for each case e Obstacles at rear only Fig 2 4 e Obstacles at rear and above only Fig 2 5 Do not install the optional air outlet guides f
130. until just before brazing Leave elbow joints etc in their packaging Vacuum pump adaptor Electronic refrigerant charging scale Gas leak detector Torque wrench If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Handle tools with care The refrigerant oil applied to flare and flange connections must be ester oil ether oil or alkylbenzene oil in a smalll amount If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Do not use a charging cylinder Charge refrigerant from liquid phase of gas cylinder If a charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered Use the specified refrigerant only Do not use refrigerant other than R410A If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc OCH480D Never use any refrigerant other than that specified Doing so may cause burst an explosion or fire when the unit is being used serv
131. uspension Forced defrost should be done as follows Change the DIP SW1 1 on the outdoor controller board from OFF to ON Forced defrost will start by the above operation if these conditions written below are satisfied Heat mode setting 10 minutes have passed since compressor started operating or previous forced defrost finished Pipe temperature is less than or equal to 8 C Forced defrost will finish if certain conditions are satisfied Forced defrost can be done if above conditions are satisfied when DIP SW1 1 is changed from OFF to ON After DIP SW1 1 is changed from OFF to ON there is no problem if DIP SW1 1 is left ON or changed to OFF again This depends on the service conditions OCH480D 45 Lees The black square m indicators a switch position Type of Switch Switch Function Action by the switch operation ON OFF Effective timing Dip switch No function Switching the target sub cool Heating mode Target sub cool down Normal Always No function No function Demand switching function Capability cut 50 Normal No function Max Frequency down Active No function No function No function No function No function No function 2 3 4 5 6 1 2 3 1 2 3 4 5 6 7 8 Model selection 140V ON OFF 160V ON DED OFF 1 140Y ON OFF
132. ve compressor Defective outdoor power circuit board 30 Open stop valve Check facility of power supply Correct the wiring phase to compressor Refer to 8 7 TEST POINT DIAGRAM Check compressor referring to 8 6 HOW CHECK THE PARTS Replace outdoor power circuit board Check code Abnormal point and detection method Case Judgment and action uously 1 Too low superheat due to low dis charge temperature Abnormal if discharge superheat is contin linear expansion valve has minimum open pulse after compressor starts operating for 10 minutes 2 Erroneous connection of refrigerant pipes or the connecting wires Consider the stopping indoor unit abnor mal if condenser evaporator temperature thermistor TH5 or RT12 detects 5 C or below continuously for 5 minutes during a compressor s operation in cooling mode detected 15 C or less even though Disconnection or loose connection of compressor temperature thermistor TH4 Defective holder of discharge temperature thermistor Failure in piping wiring Pipe liquid is clogged or crushed Check the installation conditions of compressor temperature thermistor TH4 Check piping wiring between branch box and indoor unit Refer to Test run Using remote controller Check the pipe for refrigerant and change the wrong parts if Outdoor fan motor The outdoor fan motor is consid
133. ve the top panel See Photo 1 3 Remove 5 fan grille fixing screws 5 x 12 to detach the fan grille See Photo 1 4 Remove a nut for right handed screw of M6 to detach the propeller See Photo 2 5 Disconnect the connectors CNF1 and CNF2 on controller circuit board in electrical parts box 6 Remove 4 fan motor fixing screws 5 x 25 to detach the fan motor See Photo 3 Photo 2 Propeller Front panel Photo 3 F an Fan motor fixing screws motor Fan motor fixing screws 3 Removing the electrical parts box 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the indoor outdoor connecting wire from termi nal block 4 Remove all the following connectors from controller circuit board fan motor thermistor Outdoor pipe thermistor Compressor thermistor Outdoor 2 phase pipe thermistor Outdoor high pressure switch high pressure sensor low pressure switch solenoid valve coil 4 way valve and solenoid valve coil Hot gas bypass solenoid valve coil Returning oil bypass Then remove a screw 4 x 8 from the valve bed to remove the lead wire Pull out the disconnected wire from the electrical parts box Diagram symbol in the connector housing Fan motor CNF1 CNF2 Thermistor Outdoor pipe TH3 Thermistor Compressor TH4 Thermistor Outdoor 2 phase pipe Outdoor TH7 6 High pressure switch 63
134. wire Diameter or length of indoor branch box branch box outdoor unit connecting wire is out of specified capacity Noise has entered into power supply or indoor branch box branch box outdoor unit con necting wire OCH480D 26 Check code Abnormal point and detection method Case Judgment and action Faulty connection of LEV Contact failure or miswiring of Check disconnection or looseness or polar For the connection of P100 indoor unit s indoor outdoor unit connecting ity of indoor branch box branch box outdoor the connecting wire s must be connected wire unit connecting wire of indoor and outdoor to the specified terminal block s in the The connecting wire s from units branch box P100 indoor unit s are not con Before connecting P100 indoor unit s check Incorrect wiring nected to the specified terminal the requirements described in 9 2 WIRING block s in the branch box TO P100 INDOOR UNITS The connecting wire s from P100 indoor unit s are con nected to an incorrect terminal block s in the branch box Diameter or length of indoor Check diameter and length of indoor branch branch box branch box out box branch box outdoor unit connecting wire door unit connecting wire is out wiring length 55 m outdoor branch box of specified capacity including wiring connecting each branch box unit and between branch box and outdoor unit Also check if the connection order of fla
135. y indoor unit to TB3B or TB3D Otherwise an alarm will be activated and the indoor unit will not operate OCH480D 57 10 WIRING SPECIFICATIONS A Warning In case of A control wiring there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn off the main power supply when servicing And do not touch the S1 S2 S3 terminals when the power is energized If isolator should be used between outdoor unit and branch box indoor units and branch box please use 3 pole type Power supply 3 poles isolator Switch Isolator Switch A M 51 4 51 51 i A Control Outdoor unit S2 S2 S2 S2 Indoor unit S3 53 53 53 Branch box CAUTION After using isolator be sure to turn off and on the main power supply to reset the system Otherwise outdoor unit may not be able to detect the branch box es or indoor units WIRING SPECIFICATIONS OUTDOOR BRANCH BOX CONNECTING CABLE Cross section of cable Wire size mn Number of wires Polarity m 6 Round Clockwise 51 52 53 50 Pay attention to stripe of yellow and green 2 Flat Ye Not applicable Not applicable 2 5 Because center wire has no cover finish 5 45 x3 Round OC Clockwis
136. y of MSZ EF25VE and PEAD RP50JAQ will be calculated as follows by using the formula in 4 1 2 1 Model 25 14 0 x 2 33kW Model 25 16 0 x 25 2 67kW 15 0 15 0 5 0 _ _ 5 0 _ Model 50 14 0 x 4 67kW Model 50 16 0 x 5 83kW 15 0 15 0 OCH480D 13 pT 4 2 CORRECTING COOLING AND HEATING CAPACITY 4 2 1 Correcting Changes in Air Conditions 1 The performance curve charts Figure 4 1 4 2 4 3 4 4 show the change ratio of capacity and input power consumption according to the indoor and outdoor temperature condition when define the rated capacity total capacity and rated input under the standard condition in standard piping length 5 m as 1 0 Standard conditions Indoor D B 27 W B 19 C Outdoor 35 C Indoor 20 Rated heating capacity Outdoor D B 7 WB 6 Use rated capacity and rated power values given the characteristics table for each indoor unit The capacity is the single value on the side of the outdoor unit The capacity on the sides of each indoor unit must be added to obtain the total capacity Rated cooling capacity 2 The capacity of each indoor unit may be obtained by multiplying the total capacity obtained in 1 by the ratio between the individual capacity at the rated time and the total capacity at the rated time Individual capacity at the rated time Individual capacity under stated conditions Tota

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