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Mitsubishi MXZ-8B140VA Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
<Outdoor unit>
[Model Name]
MXZ-8B140VA
MXZ-8B160VA
MXZ-8B140YA
MXZ-8B160YA
OUTDOOR UNIT
[Service Ref.]
MXZ-8B140VA
MXZ-8B160VA
MXZ-8B140YA
MXZ-8B160YA
Model name
indication
CONTENTS
1. SAFETY PRECAUTION ······································ 2
2. OVERVIEW OF UNITS ········································ 5
3. SPECIFICATIONS ············································· 12
4. DATA ·································································· 13
5. OUTLINES AND DIMENSIONS ························ 17
6. WIRING DIAGRAM ············································ 18
8. TROUBLESHOOTING ······································· 22
9. ELECTRICAL WIRING ······································ 56
10. WIRING SPECIFICATIONS . ······························ 58
11. SYSTEM CONTROL ·········································· 59
12. REFRIGERANT PIPING TASK·························· 61
13. DISASSEMBLY PROCEDURE ·························· 64
INDOOR UNITS COMBINATION SHEETS
PARTS CATALOG (OCB480)
March 2014
No. OCH480
REVISED EDITION-D
HFC
utilized
R410A
Revision:
• Added connectable indoor unit
MFZ-KJ25VE,
MFZ-KJ35VE, and
MFZ-KJ50VE in REVISED
EDITION-D.
• Some descriptions have
been modified.
• P lease void OCH480
REVISED EDITION-C.
NOTE:
• 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 <G> mark on the spec
name plate.

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Summary of Contents for Mitsubishi MXZ-8B140VA

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS March 2014 No. OCH480 REVISED EDITION-D utilized TECHNICAL & SERVICE MANUAL R410A <Outdoor unit> [Service Ref.] Revision: MXZ-8B140VA [Model Name] • Added connectable indoor unit MFZ-KJ25VE, MXZ-8B140VA MFZ-KJ35VE, and MXZ-8B160VA MFZ-KJ50VE in REVISED MXZ-8B160VA EDITION-D. • Some descriptions have MXZ-8B140YA been modified. MXZ-8B140YA • P lease void OCH480 REVISED EDITION-C.

  • Page 2: Safety Precaution

    SAFETY PRECAUTION 1-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuit must be disconnected. 1-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve.
  • Page 3 [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.
  • Page 4 (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. 1 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 Thickness (mm) Nominal Outside dimensions(inch) diameter (mm) R410A 6.35 9.52 12.70 15.88 — 19.05 2 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- fied 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. Dimension A Dimension B Flare cutting dimensions...

  • Page 5: Overview Of Units

    OVERVIEW OF UNITS 2-1. CONSTRUCTION OF SYSTEM MXZ-8B140VA/160VA MXZ-8B140YA/160YA Outdoor unit Rated Cooling 14.0 15.5 capacity (kW) Heating 16.0 18.0 Refrigerant R410A Type 15 ~ Type 100 Indoor unit CAUTION : The indoor unit which rated capability exceeds Capacity 10.0kW (100 type) can NOT be connected.
  • Page 6 2-2. SYSTEM OUTLINE The additional connection of the Branch Box together with employment of the compact 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 Indoor unit (Ceiling concealed type) 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 X Z – 8 B 140 V A Control and refrigerant A : New A control and R410A Power supply...
  • Page 7 2-3. TYPICAL COMBINATION EXAMPLE Branch box is located INSIDE of condominium Branch box (Inside) Installing branch box indoors Only 1 piping is required between the outdoor and indoor offering a fine external view. ■ System example of 5 indoor units Branch box (5 branch type) Master Dining Bedroom (1) Bedroom (2) Living bedroom Outdoor unit SEZ-60 MSZ-35...
  • Page 8 2-4. INSTALLATION 2-4-1. Outdoor unit installation location For best performance, select proper position. ● Avoid places where combustible gas may be generated or leak. ● Avoid direct sunlight or other sources of heat. ● Install sunshade to protect the outdoor unit if direct sunlight hits the unit. ● Install the outdoor unit with enough distance between neighbours as operation noise may disturb the neighbours. ● 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 countermeasures must be taken at installation to protect the outdoor unit from malfunc- tion caused by snow. ● Select a location permitting easy wiring and pipe access to the power source and indoor unit. ● 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. ● Face the air outlet towards the nearest available wall about 50 cm away from the wall. (Fig. 2-1) ● 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) A Air guide ● Position the unit so that the air outlet blows perpendicularly to the seasonal wind direction, if possible. (Fig. 2-3) B Wind direction Fig. 2-1 Fig. 2-2 Fig.
  • Page 9 (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. ● Obstacles at rear only (Fig. 2-4) ● Obstacles at rear and above only (Fig. 2-5) · Do not install the optional air outlet guides for upward airflow. ● Obstacles at rear and sides only (Fig. 2-6) ● Obstacles at front only (Fig. 2-7) * When using an optional air outlet guide, the clearance is 500 mm or more. ● Obstacles at front and rear only (Fig. 2-8) * When using an optional air outlet guide, the clearance is 500 mm or more. ● Obstacles at rear, sides, and above only (Fig. 2-9) · Do not install the optional air outlet guides for upward airflow. unit : mm Fig. 2-4 Fig. 2-5 Fig. 2-6 1500 Fig. 2-7 Fig. 2-8 Fig. 2-9 OCH480D...
  • Page 10 (3) When installing multiple outdoor units Leave 10 mm space or more between the units. ● Obstacles at rear only (Fig. 2-10) ● 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. ● Obstacles at front only (Fig. 2-12) * When using an optional air outlet guide, the clearance is 1000 mm or more. ● Obstacles at front and rear only (Fig. 2-13) * When using an optional air outlet guide, the clearance is 500 mm or more. ● 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. ● 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. ● Stacked unit arrangement (Fig. 2-16) • The units can be stacked up to 2 units high. • No more than 2 stacked units must be installed side by side. In addition, leave space as shown. unit : mm Fig. 2-10 Fig. 2-11 Fig. 2-12 Fig. 2-13 Fig. 2-14 Fig. 2-15 Fig. 2-16 OCH480D...

  • Page 11: Piping Connection Size

    2-5. SIMPLIFIED PIPING SYSTEM Piping connection size The piping connection size differs according to the type and capacity of indoor units. Liquid (mm) {9.52 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 indoor unit, use optional different-diameter (deformed) joints to the branch box side.

  • Page 12: Specifications

    SPECIFICATIONS MXZ-8B140VA MXZ-8B140YA kcal/h = kW o 860 MXZ-8B160VA MXZ-8B160YA Conversion formula: Btu/h = kW o 3412 /min o 35.31 MXZ-8B140VA MXZ-8B160VA MXZ-8B140YA MXZ-8B160YA Service Ref. Rated Cooling capacity 14.0 15.5 14.0 15.5 Rated power consumption *1 3.86 3.86 4.71 4.71...

  • Page 13: Data

    Model Model Model Model Model Model Model Model Model Model Model for indoor unit Model capacity 10.0 (2) Sample calculation 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 o 2 , PEAD-RP50JAQ o 2 According to the conditions in , the total capacity of the indoor unit will be: 2.5 o 2 + 5.0 o 2 = 15.0 T he following figures are obtained from the 150 total capacity row of the standard capacity diagram (INDOOR UNITS 3 COMBINATION SHEETS: at the back of the manual). Capacity (kW) Outdoor unit power consumption (kW) Outdoor unit current (A)/230V Cooling Heating Cooling Heating Cooling Heating 5.22 5.01 22.9...

  • Page 14: Correcting Cooling And Heating Capacity

    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 °C / W.B. 19 °C Rated cooling capacity Outdoor D.B. 35 °C Indoor D.B. 20 °C Rated heating capacity Outdoor D.B. 7 °C / W.B. 6 °C • Use the rated capacity and rated power values given in the characteristics table for each indoor unit.
  • Page 15 18.5 (132%) 0.80 0.80 15.5 (100%) 20.2 (130%) 0.75 0.75 0.70 0.70 0.65 0.65 Corrected piping length (m) Corrected piping length (m) Fig. 4-6 Heating capacity correction curve MXZ-8B140VA, MXZ-8B140YA, MXZ-8B160VA, MXZ-8B160YA Heating Capacity 0.95 (ratio) [%] Corrected piping length (m) (2) Method for Obtaining the Corrected Piping Length Corrected piping length = (Actual piping length between outdoor unit and the farthest indoor unit) + (0.30 o number of bends in the piping) (m) OCH480D...

  • Page 16: Noise Criterion Curves

    4-3. NOISE CRITERION CURVES MICROPHONE UNIT 1.5m GROUND MXZ-8B140VA MXZ-8B160VA MODE SPL(dB) LINE MODE SPL(dB) LINE COOLING COOLING MXZ-8B140YA MXZ-8B160YA HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR...

  • Page 17: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MXZ-8B140VA MXZ-8B140YA MXZ-8B160VA MXZ-8B160YA unit : mm 4 PIPING-WIRING DIRECTIONS 2 SERVICE SPACE 3 FOUNDATION BOLTS 1 FREE SPACE (Around the unit) Dimensions of space needed Please secure the unit firmly The diagram below shows a basic Piping and wiring connections example.

  • Page 18: Wiring Diagram

    WIRING DIAGRAM MXZ-8B140VA MXZ-8B160VA 63HS The black square ( ) indicates C. B. a switch position. t° t° t° t° SYMBOL NAME Terminal Block <Power Supply, Branch Box> CNF1 (WHT) Motor for Compressor CNIT TH7/6 63HS MF1, MF2 Fan Motors...
  • Page 19 MXZ-8B140YA MXZ-8B160YA 63HS SYMBOL NAME The black square ( ) indicates Terminal Block <Power Supply> C. B. a switch position. Terminal Block <Branch Box> t° t° t° t° Motor for Compressor CNF1 Fan Motors MF1, MF2 (WHT) 21S4 Solenoid Valve <Four-Way Valve> CNIT TH7/6 63HS...

  • Page 20: Necessary Conditions For System Construction

    NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION REFRIGERANT SYSTEM DIAGRAM MXZ-8B140VA MXZ-8B140YA MXZ-8B160VA MXZ-8B160YA High pressure sensor Condenser / evaporator discharge pressure sensor Room temperature temperature thermistor Check valve 63HS (TH5 or RT12) thermistor (TH1 or RT11) Bypass valve(SV2) (High Pressure) 4-way valve...
  • Page 21 ■ Pipe size (Branch box-Indoor unit) *For M series or S series Indoor unit Indoor unit type (kW) Liquid [6.35 [6.35 [6.35 [6.35 [6.35 [6.35 [6.35 [6.35 [6.35 [9.52 [9.52 Pipe size (mm) [15.88 * [9.52 [9.52 [9.52 [9.52 [9.52 [9.52 [9.52 [12.7 [15.88 [15.88 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.

  • Page 22: Troubleshooting

    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) Judge what is wrong and take a corrective action according Displayed to “8-3.
  • Page 23 8-2. CHECK POINTS FOR TEST RUN 8-2-1. Before test run ● 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. ● 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. ● Use a 500-volt M-ohm tester to check that the resistance between the power supply terminals and ground is at least 1 M". ● Do not carry out this test on the control wiring (low voltage circuit) terminals. Warning: Do not use the air conditioner if the insulation resistance is less than 1 M". 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 M" 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.
  • Page 24 (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 connecting 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."...

  • Page 25: Self-Diagnosis Action Table

    8-3. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is put on> (Note 1) Refer to indoor unit section for code P and code E. Abnormal point and detection method Case Judgment and action Check code 1 No voltage is supplied to termi- 1 Check following items. nal block (TB1) of outdoor unit. a) Power supply breaker a) Power supply breaker is b) Connection of power supply terminal turned off. block. b) Contact failure or disconnec- (TB1) tion of power supply terminal c) Connection of power supply terminal c) Open phase (L or N phase) block. (TB1) 2 Electric power is not charged to 2 Check following items.
  • Page 26 Abnormal point and detection method Case Judgment and action Check code Indoor–branch box/branch box–outdoor 1 Contact failure or miswiring of 1 Check disconnection or looseness or polar- unit connector miswiring, excessive indoor/outdoor unit connecting ity of indoor – branch box/branch box–outdoor number 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 2 Diameter or length of indoor– 2 Check diameter and length of indoor–branch and etc. after power is turned on for 4 min- branch box/branch box–out-...
  • Page 27 Abnormal point and detection method Case Judgment and action Check code Faulty connection of LEV 1 Check disconnection or looseness or polar- 1 Contact failure or miswiring of ity of indoor – branch box/branch box–outdoor For the connection of P100 indoor unit(s), indoor/outdoor unit connecting unit connecting wire of indoor and outdoor the connecting wire(s) must be connected wire units. to the specified terminal block(s) in the The connecting wire(s) from Before connecting P100 indoor unit(s), check branch box. P100 indoor unit(s) are not con- the requirements described in "9-2. WIRING Incorrect wiring nected to the specified terminal TO P100 INDOOR UNITS". block(s) in the branch box. The connecting wire(s) from P100 indoor unit(s) are con- nected to an incorrect terminal block(s) in the branch box. 2 Check diameter and length of indoor–branch 2 Diameter or length of indoor–...
  • Page 28 <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Check code Case 1) Short cycle of indoor unit (1) High-pressure switch (63H) operated 1)–6) Check indoor unit and repair defect. 2) Clogged filter of indoor unit Abnormal if high-pressure switch 63H oper- 3) Decreased airflow caused by ated ( ) during compressor operation. dirt of indoor fan 4.15 MPa 4) Dirt of indoor heat exchanger 5) Locked indoor fan motor 63H: High-pressure switch 6) Malfunction of indoor fan motor 7) Defective operation of stop 7) Check if stop valve is fully open. (2) High pressure valve (Not fully opened) (High - pressure sensor 63HS detect) 8) Clogged or broken pipe...
  • Page 29 Check code Abnormal point and detection method Case Judgment and action (1) High discharging temperature 1 Overheated compressor opera- 1 Check intake superheat. tion caused by shortage of Check leakage of refrigerant. Abnormal if compressor temperature refrigerant Charge additional refrigerant. thermistor (TH4) exceeds 125: or 110: continuously for 5 minutes. 2 Defective operation of stop 2 Check if stop valve is fully open. valve Abnormal if pressure detected by high 34 Turn the power off and check if U3 is dis- played when the power is turned on again. pressure sensor and converted to satu- 3 Defective thermistor When U3 is displayed, refer to “Judgement ration temperature exceeds 40: during 4 Defective outdoor controller board and action” for U3. defrosting and compressor temperature thermistor (TH4) exceeds 110:. 5 Defective action of linear 5 Check linear expansion valve.
  • Page 30 Abnormal point and detection method Judgment and action Check code Case (1) Open/short circuit in the outdoor unit 1 C heck the connector’s contact and the electric 1One or more connectors on thermistors (TH3, TH7, and TH8) and wires of thermistor. outdoor controller circuit board branch box’s thermistors (TH-A~E) (TH3, TH7 and TH8) and branch Abnormal if open or short circuit is detected box controller board (TH-A~E) while the compressor is operating. have contact failure or discon- Open detection of thermistors TH3 is inop- nection.
  • Page 31 Abnormal point and detection method Judgment and action Check code Case (1) Too low superheat due to low dis- 1 Disconnection or loose 12 Check the installation conditions of charge temperature connection of compressor compressor temperature thermistor (TH4). Abnormal if discharge superheat is contin- temperature thermistor. (TH4) uously detected -15: or less even though 2 Defective holder of discharge linear expansion valve has minimum open temperature thermistor pulse after compressor starts operating for 10 minutes. (2) Erroneous connection of refrigerant 1 Failure in piping/wiring 1 Check piping/wiring between branch box pipes or the connecting wires and indoor unit.
  • Page 32 Check code Abnormal point and detection method Judgment and action Case Detailed Input current sensor error/ 1 L 1-phase open (Y model) 1 C heck the field facility for the power codes L1-phase open error supply. (Y model) • Decrease in input current 2 D isconnection or loose connection 2 C heck the wiring between TB1 and out- through outdoor unit to 0.1A between TB1 and outdoor noise filter door noise filter circuit board. (Y model) only if operation frequency is circuit board (Y model) more than or equal to 40Hz 3 D isconnection or loose connection of 3 Check CN5/CNCT wiring. (Y model) or compressor current is more...
  • Page 33 Abnormal point and detection method Judgment and action Check code Case Compressor overcurrent interruption 1 Stop valve of outdoor unit is 1 Open stop valve. Abnormal if overcurrent DC bus or com- closed. 2 Check facility of power supply. pressor is detected after compressor 2 Decrease of power supply volt- 3 Correct the wiring (U·V·W phase) to com- starts operating for 30 seconds. pressor. Refer to "8-7. TEST POINT DIAGRAM". 3 Looseness, disconnection or 4 Check indoor/outdoor fan. converse of compressor wiring 5 Solve short cycle. connection 6 Replace outdoor controller circuit board. 4 Defective fan of indoor/outdoor 7 Check compressor. Refer to "8-6. HOW TO units CHECK THE PARTS". (4210) Note: 5 Short cycle of indoor/outdoor units Before the replacement of the outdoor con- troller circuit board, disconnect the wiring for 6 Defective input circuit of out- compressor from the outdoor power circuit door controller board...
  • Page 34 Abnormal point and detection method Judgment and action Check code Case Serial communication error 1 Breaking of wire or contact 12 Check connection of each connector CN2 Abnormal if serial communication between failure of connector CN2 and CN4 between the outdoor controller outdoor controller circuit board and between the outdoor controller circuit board and the outdoor power circuit outdoor power circuit board is defective. circuit board and the outdoor board. power circuit board 2 Breaking of wire or contact failure of connector CN4 between the outdoor controller (0403) circuit board and the outdoor power circuit board 3 Defective communication circuit 3 Replace outdoor power circuit board. of outdoor power circuit board 4 Defective communication circuit 4 Replace outdoor controller circuit board. of outdoor controller circuit board for outdoor power circuit board Forced compressor stop. 1 Drain pump trouble 1 Check the drain pump.

  • Page 35: Troubleshooting Of Problems

    8-4. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display operates 1 Refrigerant shortage 1 If refrigerant leaks, discharging tempera- normally and the unit performs cool- ture rises and LEV opening increases. ing operation, however, the capacity Inspect leakage by checking the tem- cannot be fully obtained. (The air perature and opening. does not cool well.) Check pipe connections for gas leakage. 2 Filter clogging 2 Open intake grille and check the filter. Clean the filter by removing dirt or dust on it. 3 Heat exchanger clogging 3 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. 4 Air duct short cycle 4 Remove the blockage. 2. Remote controller display operates 1 Linear expansion valve fault 1 Discharging temperature and indoor heat normally and the unit performs...

  • Page 36: Special Functions

    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 about 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. 1 Complete the circuit as shown when using the external input adapter (PAC-SC36NA). (Optional parts) A Remote control panel F Procure locally B Relay circuit G Max. 10m H Orange C External input adapter (PAC-SC36NA) D Outdoor unit control board I Brown E Replay power supply J Red...
  • Page 37 8-6. HOW TO CHECK THE PARTS MXZ-8B140VA MXZ-8B140YA MXZ-8B160VA MXZ-8B160YA Parts name Check points Disconnect the connector then measure the resistance with a tester. Thermistor (TH3) (At the ambient temperature 10:~30:) <Outdoor pipe> Normal Abnormal Thermistor (TH4) <Compressor> 160k" ~ 410k"...
  • Page 38 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connecter (CNF1, 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. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
  • Page 39 <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 ~ TH-E)···· Branch box Thermistor R0 = 15 k" ± 3 % B constant = 3480 ± 2 % =15exp{3480( 273+t – 273 )} 0 : 15 k" 30 : 4.3 k" 10 : 9.6 k" 40 : 3.0 k" 20 : 6.3 k" 25 : 5.4 k" -20 -10 Temperature (:) Medium temperature thermistor Heatsink temperature thermistor (TH8) Thermistor R50 = 17 k" ± 2% B constant = 4170 ± 3% =17exp{4170( 273+t – 323 )} 0 : 180 k"...
  • Page 40 8-7. TEST POINT DIAGRAM <CAUTION> TEST POINT 1 is high voltage. 8-7-1. Outdoor controller circuit board MXZ-8B140VA MXZ-8B140YA MXZ-8B160VA MXZ-8B160YA CNDM CN51 1 to 2: Input of low-level sound priority mode 1 to 3: Input of external contact point SW9 SW2 CN3S Forced defrost, detect history record reset CN52C Connect to the noise fil- ter circuit board (CN52C) (MXZ-8B140/160VA) Model select Test operation Function switch Transmission to out- door power circuit board (CN4) Solenoid valve 1 Low pressure switch Solenoid valve 2 63HS High pressure sensor 21S4 Four-way valve Thermistor <Compressor>...
  • Page 41 8-7-2. Outdoor noise filter circuit board MXZ-8B140YA MXZ-8B160YA LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : AC380/400/415V input LI1-NI/LI2-NI/LI3-NI : AC220/230/240V input (Connect to the terminal block (TB1)) Connect to the earth Connect to the earth CNAC1, CNAC2 AC220/230/240V (Connect to the outdoor controller circuit board (CNAC)) CNCT Primary current CNDC (Connect to the (Connect to the outdoor power outdoor controller circuit board (CN5)) circuit board (CNDC)) LO1, LO2, LO3 POWER SUPPLY Connect to the Connect to the ACL4 LO1-LO2/LO2-LO3/LO3-LO1: AC380/400/415V OUTPUT outdoor converter circuit board (N-IN) OCH480D...
  • Page 42 8-7-3. Outdoor power circuit board MXZ-8B140VA MXZ-8B160VA Connect to the outdoor controller circuit board (CN2) 1-5: Transmitting signal to outdoor controller circuit board (0-5 V DC) Connect to the outdoor 2-5: Zero cross signal (0-5 V DC) controller circuit board (CN4) 3-4: 18 V DC 6-5: 16 V DC 7-5: 16 V DC CN52C CNDC Connect to the smoothing 52C driving signal 280-380 V DC (1+, 3-) Connect to the outdoor Connect to the outdoor capacitor CB - controller circuit board controller circuit board E2, E3 (CN52C) (CNDC) Connect to the earth U/V/W EI, E4 CNAC1, CNAC2 NI, LI Connect to the compres- Connect to the smooth- Connect to the...
  • Page 43 Brief Check of POWER MODULE Outdoor power circuit board * Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). MXZ-8B140YA If they are short-circuited, it means that they are broken. MXZ-8B160YA 1. Check of POWER MODULE 1 Check of DIODE circuit L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2 Check of IGBT circuit P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W Note: The marks, L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W shown in the diagram are not actually printed on the board. Detection of Connect to the outdoor controller circuit Connect to the Connect to the primary current outdoor controller board (CN2) outdoor converter (Connect to the circuit board Transmitting → 1-5: Power circuit board circuit board outdoor noise filter (CN4) signal to the controller board (0-5V DC) (CN7) circuit board (CNCT)) 2-5: Zero cross signal (0-5V DC) [ 5 : – 1, 2, 6, 7 : + ] 3-4: Not used 6-5: 16V DC 7-5: 16V DC...
  • Page 44 8-7-4. Outdoor converter circuit board MXZ-8B140YA MXZ-8B160YA L1-A1 L1-IN, N-IN CK-OU Connect to the ACL1 Connect to the noise filter Connect to the CK capacitor circuit board (LO1, No) Connect to the outdoor power circuit board (CN7) 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...

  • Page 45: Function Of Switches, Connectors And Jumpers

    8-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches The black square (■) indicators a switch position. Action by the switch operation Type of Switch Function Effective timing Switch When compressor is Forced defrost Start Normal operating in heating operation.
  • Page 46 The black square (■) indicators a switch position. Action by the switch operation Type of Switch Function Effective timing Switch No function — — — Switching the target Target sub-cool down Normal Always sub-cool (Heating mode) — — — 3, 4 No function —...
  • Page 47 <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 Unit 2 3 4 5 6 <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. 1 second When the power supply is ON, blinking displays by turns. interval Wait for 4 minutes at the longest. (2) When the display lights (Normal operation) 1 Operation mode display (Lighting) LED3 (Initial setting) 2 3 4 5 6 The ones digit : Relay output The tens digit : Operation mode Warming-up Solenoid valve...
  • Page 48 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid (TH3) - 40 to 90 - 40 to 90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) 2 3 4 5 6 When - 10:; 0.5 secs. 0.5secs. 2 secs. Compressor temperature (TH4) 3 to 217 (When the discharge thermistor detects 100: or 3 to 217 more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) 2 3 4 5 6 When 105:; 0.5 secs. 0.5secs. 2 secs. Output step of outdoor FAN 0 to 10 0 to 10 Step...
  • Page 49 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid (TH3) on error - 40 to 90 occurring (When the coil thermistor detects 0: or below, “–” - 40 to 90 and temperature are displayed by turns.) (Example) When - 15:; 0.5 secs. 0.5 secs. 2 secs. 2 3 4 5 6 Compressor temperature (TH4) or 3 to 217 discharge temperature (TH4) on error (When the temperature is 100: or more, the occurring hundreds digit, tens digit and ones digit are 3 to 217 displayed by turns.) (Example) 2 3 4 5 6 When - 15:; 0.5 secs. 0.5 secs. 2 secs. Compressor operating current on error 0 to 50 occurring 0 to 50 2 3 4 5 6 Check code history (1) (latest) When no check code history, Alternate display of abnormal unit...
  • Page 50 ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Displayed as an outdoor capacity code. Capacity setting display Code Capacity Code MXZ-8B140VA/YA display 2 3 4 5 6 MXZ-8B160VA/YA Outdoor unit setting information • The tens digit (Total display for applied setting) Setting details Display details H·P / Cooling only 0 : H·P 1 : Cooling only...
  • Page 51 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17 to 30 17 to 30 Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 2 3 4 5 6 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 Outdoor pipe temperature / 2-phase - 39 to 88 (TH6) (When the temperature is 0: or less, “–” and...
  • Page 52 ■ The black square ( ) 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 2 3 4 5 6 “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 2 3 4 5 6 “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 2 3 4 5 6 Error thermistor display : Outdoor pipe temperature /Liquid (TH3)
  • Page 53 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor pipe temperature / Liquid on - 39 to 88 error occurring (When the temperature is 0 °C or less, “–” and - 39 to 88 temperature are displayed by turns.) Indoor unit 1 (Example) Indoor unit 2 Indoor unit 3 When - 15 °C; 0.5 secs. 0.5 secs. 2 secs. Indoor unit 4 2 3 4 5 6 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 Indoor pipe temperature / Cond./ Eva.
  • Page 54 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 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; Minute 0.5 secs. 0.5 secs. 2 secs. 2 3 4 5 6 Target rotation of outdoor fan motor 0 to 999 2 3 4 5 6 Sub-cool (Heating mode) 0 to 130 Indoor unit 1 Indoor unit 2 2 3 4 5 6 Indoor unit 3 Indoor unit 4 Indoor unit 5...
  • Page 55 8-9. SELECTING FUNCTIONS USING THE REMOTE 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 A fter 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 : Initial setting Function Settings Mode No. Setting No. Remarks (when sent from the factory) Power failure automatic recovery ON *2 The setting is Indoor temperature applied to all Data from the indoor unit with remote controller...

  • Page 56: Electrical Wiring

    ELECTRICAL WIRING 9-1. EXTERNAL WIRING PROCEDURE (Fig. 9-1) E 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(") Note: 1 Power supply input: Outdoor unit only. Connect the lines (C), (D) in accordance with the terminal block names to ensure correct polarity. 2 As for lines (C), S1 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 (A) Main power (C) Signal line/ (D) Signal line/ Interrupting Performance (B) Earth line line Earth line Earth line current characteristic Model 1.5 mm² *1/ 1.5 mm²/ 40 A, 30 mA 140/160V 6.0 mm² 6.0 mm² 40 A Min. 1.5 mm² Min. 1.5 mm² for 0.1 sec. or less 1.5 mm² *1/ 1.5 mm²/ 25 A, 30 mA...
  • Page 57 <Example 2> 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 box. Branch Box • When wiring a single P100 indoor unit, use TB3A. (PAC-AK52BC only) Indoor unit TB3A A ROOM Notes: P100 • When wiring a single P100 indoor unit, ONLY use TB3A. Indoor unit If a single P100 indoor unit is wired to the other terminal Circuit...

  • Page 58: Wiring Specifications

    WIRING SPECIFICATIONS 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-Control" Outdoor unit Indoor unit 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.

  • Page 59: System Control

    SYSTEM CONTROL 11-1. BASIC SYSTEMS NOTE: The indoor units can be OC : Outdoor unit connected to any of the BC : Branch box 5 connectors IC : Indoor unit (5- branch type) or 3 connectors RC : Remote controller (3- branch type) of the branch box.
  • Page 60 11-3. INCORRECT SYSTEMS 11-3-1. Group operation by single remote controller BC (3- branch type) • Plural indoor units cannot be operated by a single remote controller. 11-3-2. Group operation between different refrigerant systems BC (3- branch type) BC (3- branch type) •...

  • Page 61: Refrigerant Piping Task

    REFRIGERANT PIPING TASK 12-1. ADDITIONAL REFRIGERANT CHARGE a7 a8 Outdoor unit Branch box Indoor unit *1 Although two refrigerant pipes are used between the branch box and the Y-shape connection pipe when connecting the P100 indoor unit, calculate the piping lengths using only the length of one pipe. 1 Indoor unit [P100 type] 2 Y-shape connection pipe a1 = c1 + c2 Total piping length b1 + b2 + a1+ a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 115m Farthest piping length (L) b2 + a8 [ 70m (b2 [ 55m, a8 [ 15m) Permissible...
  • Page 62 <Table 1> Total piping length 40m or less 41 – 50m 51 – 70m 71 – 90m 91 – 115m (b1+ b2 + a1+ a2 + a3 + a4 + a5 + a6 + a7 + a8) Additional refrigerant charging amount 0kg (no need) 0.6kg 1.4kg...

  • Page 63: Precautions Against Refrigerant Leakage

    12-3. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 12-3-1. Introduction (2) Calculate room volumes (m³) and find the room with the smallest volume R410A refrigerant of this air conditioner is non-toxic and 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 to keep the R410A concentration specified by ISO Outdoor unit 5149-1 as follows.

  • Page 64: Disassembly Procedure

    DISASSEMBLY PROCEDURE MXZ-8B140VA MXZ-8B140YA MXZ-8B160VA MXZ-8B160YA PHOTOS & ILLUSTRATION OPERATING PROCEDURE 1. Removing the service panel and top panel Top panel fixing screws Top panel Photo 1 (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service Service panel panel. Slide (2) Remove screws (3 for front, 3 for rear/5 × 12) of the top Grille fixing panel and remove it. screws Fan grille Front panel Grille fixing Service panel screws...
  • Page 65 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) Photo 5 (1) Remove the service panel. (See Photo 1) Thermistor Controller circuit board (2) Remove the top panel. (See Photo 1) <Outdoor 2-phase pipe> (TH6) (C.B.) (3) Disconnect the connectors, TH6 and 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. (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 to remove thermistor <Outdoor>. Clamp 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.
  • Page 66 OPERATING PROCEDURE PHOTOS Photo 8 7. Removing the solenoid valve coil <4-way valve> (21S4) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) [Removing the solenoid valve coil <4-way valve>] Solenoid valve coil (3) Remove 4-way valve solenoid coil fixing screw 4-way valve <4-way valve> (21S4) (M5 × 6). (4) Remove the solenoid valve coil <4-way valve> by sliding the coil toward you. (5) Disconnect the connector 21S4 (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 × 10) and 4 ball valve and stop valve fixing screws (5 × 16) and then remove the valve bed.
  • Page 67 OPERATING PROCEDURE PHOTOS Photo 10 11. Removing the high pressure switch (63H) and low pres- sure switch (63L) (1) Remove the service panel. (See Photo 1) High pressure switch (63H) Low pressure switch (63L) (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 × 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 °C 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)
  • Page 68 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN cCopyright 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 New publication, effective Mar. 2014 Made in Japan Specifications are subject to change without notice.
  • Page 69 MXZ-8B140VA 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:". Power Consumption Capacity (W)
  • Page 70 MXZ-8B140VA Power Consumption Total capacity of Capacity (W) Current(A)/220V Current(A)/230V Current(A)/240V (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 8000 9100 2.56 3.22 11.8 14.8 11.2 14.1 10.8 13.6 8100 9300 2.59 3.30 11.9 15.2 11.4...
  • Page 71 MXZ-8B140VA Power Consumption Total capacity of Capacity (W) Current(A)/220V Current(A)/230V Current(A)/240V (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 14000 16000 5.22 5.09 24.0 23.4 22.9 22.4 22.0 21.4 14000 16000 5.22 5.05 24.0 23.2 22.9...
  • Page 72 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:". Power Consumption Capacity (W) Current(A)/220V Current(A)/230V Current(A)/240V...
  • Page 73 MXZ-8B160VA Power Consumption Capacity (W) Current(A)/220V Current(A)/230V Current(A)/240V Total capacity of (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 8000 9300 2.56 3.30 11.8 15.2 11.2 14.5 10.8 13.9 8100 9400 2.59 3.33 11.9 15.3 11.4 14.6 10.9...
  • Page 74 MXZ-8B160VA Power Consumption Capacity (W) Current(A)/220V Current(A)/230V Current(A)/240V Total capacity of (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 14800 18000 5.96 6.17 27.4 28.3 26.2 27.1 25.1 26.0 14900 18000 6.04 6.16 27.7 28.3 26.5 27.1 25.4...
  • Page 75 MXZ-8B140YA 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:". Power Consumption Capacity (W) Current(A)/380V Current(A)/400V Current(A)/415V...
  • Page 76 MXZ-8B140YA Power Consumption Capacity (W) Current(A)/380V Current(A)/400V Current(A)/415V Total capacity of (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 8000 9100 2.56 3.22 8100 9300 2.59 3.30 8200 9400 2.62 3.34 8300 9500 2.65 3.38 8400 9600 2.67...
  • Page 77 MXZ-8B140YA Power Consumption Capacity (W) Current(A)/380V Current(A)/400V Current(A)/415V Total capacity of (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 14000 16000 5.22 5.09 14000 16000 5.22 5.05 14000 16000 5.22 5.01 14000 16000 5.15 4.96 14000 16000 5.08...
  • Page 78 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:". Power Consumption Capacity (W) Current(A)/380V Current(A)/400V Current(A)/415V...
  • Page 79 MXZ-8B160YA Power Consumption Capacity (W) Current(A)/380V Current(A)/400V Current(A)/415V Total capacity of (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 8000 9300 2.56 3.30 8100 9400 2.59 3.33 8200 9500 2.62 3.37 8300 9600 2.65 3.41 8400 9800 2.67...
  • Page 80 MXZ-8B160YA Power Consumption Capacity (W) Current(A)/380V Current(A)/400V Current(A)/415V Total capacity of (kW) indoor unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 14800 18000 5.96 6.17 14900 18000 6.04 6.16 15000 18000 6.15 6.16 15100 18000 6.19 6.16 15200 18000 6.23...

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