Mitsubishi Electric MXZ-8A140VA Technical & Service Manual
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Mitsubishi Electric MXZ-8A140VA Technical & Service Manual

Split-type, heat pump air conditioners
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See also: Service Manual , Installation Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL

[Model name]

<Outdoor unit>
MXZ-8A140VA
<Branch box>
PAC-AK50BC
PAC-AK30BC
(Indispensable optional parts
for MXZ-8A140VA)
[Service Ref.]
MXZ-8A140VA
MXZ-8A140VA
MXZ-8A140VA
MXZ-8A140VA
PAC-AK50BC
PAC-AK30BC
CONTENTS
1. TECHNICAL CHANGES ···································2
2. SAFETY PRECAUTION····································3
3. OVERVIEW OF UNITS······································6
4. SPECIFICATIONS ···········································14
5. DATA ·······························································16
6. OUTLINES AND DIMENSIONS ······················31
7. WIRING DIAGRAM ·········································34
9. TROUBLESHOOTING ····································40
10. ELECTRICAL WIRING····································88
Model name
indication
11. WIRING SPECIFICATIONS·····························89
12. SYSTEM CONTROL ·······································90
13. REFRIGERANT PIPING TASK ·······················92
14. DISASSEMBLY PROCEDURE ·······················95
15. PARTS LIST ··················································102
16. RoHS PARTS LIST ·······································109
17. OPTIONAL PARTS ··························Back cover
August 2007
No. OC316
REVISED EDITION-D
HFC
utilized
R410A
Revision:
· MXZ-8A140VA
is added in
3
REVISED EDITION-D.
· Some descriptions have
been modified.
1
· Please void OC316
REVISED EDITION-C.
2
NOTE:
3
·This service manual
describes technical data of
outdoor unit and branch box.
As for indoor units, refer to
its service manual.
• RoHS compliant products
have <G> mark on the
spec name plate.
• For servicing RoHS com-
pliant products, refer to the
RoHS PARTS LIST.

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Summary of Contents for Mitsubishi Electric MXZ-8A140VA

  • Page 1: Model Name

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS August 2007 No. OC316 REVISED EDITION-D utilized R410A TECHNICAL & SERVICE MANUAL [Model name] [Service Ref.] Revision: · MXZ-8A140VA is added in <Outdoor unit> REVISED EDITION-D. MXZ-8A140VA · Some descriptions have MXZ-8A140VA been modified. MXZ-8A140VA · Please void OC316 MXZ-8A140VA REVISED EDITION-C.

  • Page 2: Technical Changes

    TECHNICAL CHANGES MXZ-8A140VA MXZ-8A140VA The parts below have been changed. • THERMISTOR (DISCHARGE/TH4) (Connector change) • CONTROLLER CIRCUIT BOARD(C.B) • NOISE FILTER CIRCUIT BOARD(N.F.) • ACTIVE FILTER MODULE(ACTM) • RELAY(52C), RESITOR(RS)(including N.F.) MXZ-8A140VA MXZ-8A140VA The parts below have been changed.

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuit must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use new refrigerant pipes. 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.
  • Page 4 [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 5 (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 time higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 6: Overview Of Units

    OVERVIEW OF UNITS 3-1. CONSTRUCTION OF SYSTEM MXZ-8A140VA/ MXZ-8A140VA / MXZ-8A140VA / MXZ-8A140VA Rated capacity (kW) 14.0/16.0 (Cooling/Heating) Outdoor unit R410A Type 22 ~ Type 80 Capacity CAUTION : The indoor unit which rated capability exceeds Indoor unit 8.0kW (80 type) can NOT be connected.
  • Page 7 3-2. SYSTEM OUTLINE The additional connection of the Branch Box together with employment of the compact trunk-looking outdoor unit can suc- cessfully realizes a long distance piping for big houses. Equipped with a microcomputer, the Branch Box can translate the transmission signal of indoor units to achieve the optimum control.
  • Page 8 3-3. 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)
  • Page 9 3-4. INSTALLATION 3-4-1. 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.
  • Page 10 (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) ·...
  • Page 11 (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. •...
  • Page 12 3-4-3. Space required for Installation and servicing for Branch box. (1) Front View (Fig. 3-1) A Branch box B On the side of piping (2)Side View (Fig. 3-2, Fig. 3-3) C For indoor installations D Ceiling board E Maintenance hole F PCB side w1:A minimum 350 mm is required for 90°...
  • Page 13 3-5. 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 14: Specifications

    SPECIFICATIONS • Outdoor unit : MXZ-8A140VA MXZ-8A140VA kcal/h = kW o 860 MXZ-8A140VA MXZ-8A140VA Btu/h = kW o 3412 Conversion formula: /min o 35.31 MXZ-8A140VA/ MXZ-8A140VA / MXZ-8A140VA / MXZ-8A140VA Service Ref. Rated Cooling capacity 14.0 Rated power consumption w1 3.79...
  • Page 15 • Branch box : PAC-AK50BC PAC-AK30BC PAC-AK50BC PAC-AK30BC Model name Connectable number of indoor units MAX. 5 MAX. 3 Power supply (from outdoor unit) Single phase, 220/230/240V, 50Hz, Single phase, 220V, 60Hz Input 0.003 Running current 0.05 External finish Galvanized sheets Drain hose size (on site) O.D.20 (VP-16) Width...
  • Page 16 DATA 5-1. CAPACITY AND CHARACTERISTICS Note: • Cooling capacity is based on D.B. 27: / W.B. 19.0: (indoor temperature), D.B. 35: (outdoor temperature). • Heating capacity is based on D.B. 20: (indoor temperature), D.B. 7: / W.B. 6: (outdoor temperature). The rated capacities below show the rise in the indoor unit connection capacity when operating frequency is constant.
  • Page 17 <Cooling> Total Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit Outdoor unit capacity input ( W ) ( W ) Unit A Unit B Unit C Unit A Unit B Unit C 230V 240V...
  • Page 18 <Cooling> Total Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit Outdoor unit capacity input ( W ) ( W ) Unit A Unit B Unit C Unit D Unit A Unit B Unit C Unit D...
  • Page 19 <Cooling> Total Outdoor unit Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit input ( W ) capacity ( W ) Unit A Unit B Unit C Unit D Unit E Unit A Unit B Unit C Unit D...
  • Page 20 <Cooling> Total Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit Outdoor unit capacity input ( W ) ( W ) Unit A Unit B Unit C Unit D Unit E Unit F Unit A Unit B Unit C Unit D Unit E Unit F 230V 240V 220V...
  • Page 21 <Cooling> Total Capacity of each unit ( W ) Outdoor unit current ( A ) Number of operated indoor unit rated Outdoor unit capacity input ( W ) ( W ) Unit A Unit B Unit C Unit D Unit E Unit F Unit G Unit A Unit B Unit C Unit D Unit E Unit F Unit G 230V 240V 220V...
  • Page 22 (2) Heating mode <Heating> Total Capacity of rated Outdoor unit current ( A ) Number of operated indoor unit Outdoor unit each unit ( W ) capacity input ( W ) ( W ) Unit A Unit B Unit A Unit B 230V 240V...
  • Page 23 <Heating> Total Outdoor unit Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit input ( W ) capacity ( W ) Unit A Unit B Unit C Unit A Unit B Unit C 230V 240V...
  • Page 24 <Heating> Total Outdoor unit Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit input ( W ) capacity ( W ) Unit A Unit B Unit C Unit D Unit A Unit B Unit C Unit D...
  • Page 25 <Heating> Total Outdoor unit Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit input ( W ) capacity ( W ) Unit A Unit B Unit C Unit D Unit E Unit A Unit B Unit C Unit D...
  • Page 26 <Heating> Total Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit Outdoor unit capacity input ( W ) ( W ) Unit A Unit B Unit C Unit D Unit E Unit F Unit A Unit B Unit C Unit D Unit E Unit F 230V...
  • Page 27 <Heating> Total Capacity of each unit ( W ) rated Outdoor unit current ( A ) Number of operated indoor unit Outdoor unit capacity input ( W ) ( W ) Unit A Unit B Unit C Unit D Unit E Unit F Unit G Unit A Unit B Unit C Unit D Unit E Unit F Unit G 230V 240V 220V...

  • Page 28: Correcting Cooling And Heating Capacity

    5-2. CORRECTING COOLING AND HEATING CAPACITY 5-2-1. Correcting Changes in Air Conditions (1)The performance curve charts (Figure 1-1, 1-2, 2-1, 2-2) 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 (5m) as “1.0”.
  • Page 29 5-2-2. Correcting Capacity for Changes in 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 length from Fig.3, Fig.4 and then multiply by the capacity from Fig.1-1, 1-2, Fig.2-1, 2-2 to obtain the actual capacity.

  • Page 30: Noise Criterion Curves

    5-3. NOISE CRITERION CURVES MICROPHONE UNIT 1.5m GROUND MXZ-8A140VA SPL(dB) MODE LINE COOLING MXZ-8A140VA HEATING MXZ-8A140VA MXZ-8A140VA NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...

  • Page 31: Outlines And Dimensions

    OUTLINES AND DIMENSIONS 6-1. OUTDOOR UNIT unit : mm MXZ-8A140VA MXZ-8A140VA MXZ-8A140VA 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 Piping and wiring connections...

  • Page 32: Service Space

    : mm MXZ-8A140VA 4 PIPING-WIRING DIRECTIONS 1 FREE SPACE (Around the unit) 2 SERVICE SPACE 3 FOUNDATION BOLTS Dimensions of space needed Please secure the unit firmly Piping and wiring connections The diagram below shows a basic example. for service access are with 4 foundation (M10) bolts.
  • Page 33 6-2. BRANCH BOX UNIT unit : mm PAC-AK50BC SUSPENSION BOLT PITCH SUSPENSION BOLT : W3/8 (M10) REFRIGERANT PIPE FLARED CONNECTION (inch) TO OUTDOOR UNIT LIQUID PIPE GAS PIPE DRAIN HOSE SIZE : O.D. 20 (VP-16) 3-ELECTRIC WIRE INLET TERMINAL BLOCK TO INDOOR UNIT TO INDOOR UNIT 3-WIRE BAND...

  • Page 34: Wiring Diagram

    WIRING DIAGRAM 7-1. OUTDOOR UNIT MXZ-8A140VA...
  • Page 35 MXZ-8A140VA MXZ-8A140VA...
  • Page 36 MXZ-8A140VA...
  • Page 37 7-2. BRANCH BOX : PAC-AK50BC PAC-AK30BC Note : " PAC - AK30 . 50BC " is only for R410A. SYMBOL NAME Branch box controller board <B.C> Fuse 250V 6.3A SW1<B.C> Switch for service CNM<B.C> Connector LED1~5< B.C> Light emitting diode LEV - A~E Linear expansion valve TH - A~E...

  • Page 38: Necessary Conditions For System Construction

    LEV (For return of oil ahead of LEV (For SV2) (in cooling mode) from oil separator) (in cooling mode) MXZ-8A140VA MXZ-8A140VA [4 o [2.4 o L250 [2.5 o [0.8 o L1000 Outdoor unit MXZ-8A140VA MXZ-8A140VA ([4 o [2.4 o L140) o 5 ([4 o [2.2 o L130) o 5...
  • Page 39 Pipe size (Branch box-Indoor unit) *Case of M series or S series Indoor unit Indoor unit (kW) type Liquid [6.35 [6.35 [6.35 [6.35 [6.35 [9.52 [9.52 Pipe size [15.88 w (mm) [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 40: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error 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.
  • Page 41 9-2. CHECK POINTS FOR TEST RUN 9-2-1. 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, looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.
  • Page 42 (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 43: Self-Diagnosis Action Table

    9-3. 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 Judgment and action Error Code Case 1 No voltage is supplied to termi- 1 Check following items.
  • Page 44 Error Code Abnormal point and detection method Case Judgment and action 1 Contact failure or miswiring of 1 Check disconnection or looseness or polarity Indoor–branch box/branch box–outdoor indoor/outdoor unit connecting of indoor–branch box/branch box–outdoor unit connector miswiring, excessive wire unit connecting wire of indoor and outdoor number of units units.
  • Page 45 <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Error Code Case (1) High-pressure switch (63H) worked 1) Short cycle of indoor unit 1)~6) Check indoor unit and repair defect. Abnormal if high-pressure switch 63H 2) Clogged filter of indoor unit worked ( w ) during compressor operation.
  • Page 46 Case Error Code Abnormal point and detection method Judgment and action 1 Overheated compressor opera- 1 Check intake superheat. (1) High discharging temperature Abnormal if discharge temperature tion caused by shortage of Check leakage of refrigerant. thermistor (TH4) exceeds 125: or refrigerant Charge additional refrigerant.
  • Page 47 Abnormal point and detection method Judgment and action Error Code Case 1Check the connector’s contact and the electric (1) Open/short circuit in the outdoor 1One or more connectors on out- wires of thermistor. unit thermistors (TH3, TH7, and TH8) door controller circuit board (TH3, TH7 and TH8) and and branch box’s thermistors(TH-A~E) branch box controller board...
  • Page 48 Abnormal point and detection method Judgment and action Error Code Case 1 Disconnection or loose 12 Check the installation conditions of (1)Too low superheat due to low dis- charge temperature connection of discharge discharge temperature thermistor (TH4). Abnormal if discharge superheat is contin- temperature thermistor.
  • Page 49 Abnormal point and detection method Judgment and action Error Code Case 1 Disconnection of compressor 1 Correct the wiring (U·V·W phase) to com- Current sensor error Abnormal if current sensor detects –1.5A wiring pressor. Refer to 9-7. to 1.5A during compressor operation. (This 2 Defective circuit of current 2 Replace outdoor power circuit board.
  • Page 50 Abnormal point and detection method Judgment and action Error Code Case 1 Indoor–branch box/ 1 Check disconnection or looseness of indoor– Indoor - branch box/branch box - outdoor unit communication error branch box–outdoor unit con- branch box/branch box–outdoor unit connect- necting wire has contact fail- (Transmitting error) ing wire.

  • Page 51: Troubleshooting By Inferior Phenomena

    9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Phenomena Factor Countermeasure 1Refrigerant shortage 1 If refrigerant leaks, discharging tempera- 1. Remote controller display works normally and the unit performs ture rises and LEV opening increases. cooling operation, however, the Inspect leakage by checking the tem- capacity cannot be fully obtained.

  • Page 52: Special Functions

    9-5. SPECIAL FUNCTIONS 9-5-1. Low noise mode (on-site modification) (Fig. 9-1) 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.
  • Page 53 9-6. HOW TO CHECK THE PARTS OUTDOOR UNIT : MXZ-8A140VA MXZ-8A140VA MXZ-8A140VA MXZ-8A140VA Check points Parts name Disconnect the connector then measure the resistance with a tester. Thermistor (TH3) (At the ambient temperature 10:~30:) <Outdoor pipe> Normal Abnormal Thermistor (TH4) <Discharge>...
  • Page 54 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. Give 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...
  • Page 55 <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 = 15k' ± 3% B constant = 3480 ± 2% =15exp{3480( 273+t –...
  • Page 56 BRANCH BOX : PAC-AK50BC PAC-AK30BC Parts name Check points Disconnect the connector then measure the resistance with a tester. Thermistor (TH-A~E) (At the ambient temperature 10:~30:) <Gas pipe> Normal Abnormal 4.3k"~9.6k" Open or short Disconnect the connector then measure the resistance with a tester. Linear expansion valve (Winding temperature 20:) ( LEV-A~E )
  • Page 57 Linear expansion valve (LEV) in Branch box (1) Operation summary of the linear expansion valve • Linear expansion valve open/close through stepping motor after receiving the pulse signal from the branch box controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the branch box controller board and the linear expansion valve>...
  • Page 58 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Coil Lead wire Stopper <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 59 Troubleshooting Check point Corrective measure Problem Locked expansion Replace the linear If the linear expansion valve becomes locked and the motor is still operating, valve expansion valve. the motor will emit a clicking noise and will not function. This clicking noise indicates an abnormality.
  • Page 60 9-7. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. 9-7-1. Outdoor controller circuit board MXZ-8A140VA MXZ-8A140VA MXZ-8A140VA (TEST POINT 2) (voltage between pins of C6B): DC 15V (TEST POINT 1) (voltage between pins of (Branch box/outdoor unit connecting wire)
  • Page 61 <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board MXZ-8A140VA Forced defrost, CN3S detect history record reset CN51 CNDM Model select 1 to 2: Input of low noise Test operation mode 1 to 3: Input of external con- tact point...
  • Page 62 9-7-2. Outdoor noise filter circuit board MXZ-8A140VA LO, NO Voltage of 220-240V AC is output (Connect to the outdoor power circuit board (SC-R, SC-S)) CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) Primary current (Connect to the...
  • Page 63 Outdoor noise filter circuit board MXZ-8A140VA MXZ-8A140VA LO, NO Voltage of 220-240V AC is output TABS (Connect to the outdoor power circuit board) TABT CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) Primary current (Connect to the...
  • Page 64 Outdoor noise filter circuit board MXZ-8A140VA CN52C 52C driving signal (Connect to the outdoor controller circuit board (CN52C).) LO, NO Voltage of 220-240V AC is output (Connect to the outdoor CNAC1, CNAC2 power circuit board 220-240V AC (TABS, TABT)) (Connect to the...
  • Page 65 W Usually, they are in a state of being short-circuited if they are broken. 9-7-3. Outdoor power circuit board Measure the resistance in the following points (connectors, etc.). MXZ-8A140VA If they are short-circuited, it means that they are broken. 1. Check of POWER MODULE 1.Check of DIODE circuit...
  • Page 66 W Usually, they are in a state of being short-circuited if they are broken. Outdoor power circuit board Measure the resistance in the following points (connectors, etc.). MXZ-8A140VA If they are short-circuited, it means that they are broken. MXZ-8A140VA 1. Check of POWER MODULE 1.Check of DIODE circuit...
  • Page 67 9-7-4. Branch box controller board PAC-AK50BC PAC-AK30BC LED1 Transmission start-up state display TH-A to E Connect to Start-up : LED1 blinks LEV-A to E Thermistor-A to E Connect to LEV-A to E (0.5sec. : ON, 0.5sec. : OFF) TH-A to C for PAC-AK30BC LEV-A to C for PAC-AK30BC Start-up completion:LED1 lights LED3~5...
  • Page 68 9-7-5. Active filter module MXZ-8A140VA MXZ-8A140VA MXZ-8A140VA Connect to the outdoor L1, L2 power circuit board(TABP1) Connect to the DCL(Reactor) – Connect to the outdoor power circuit board(TABN1) Connect to the outdoor power circuit board(CNAF) : GND 2-1 : 15V DC...
  • Page 69 Active filter module MXZ-8A140VA Connect to the outdoor power circuit board(TABP2) L1, L2 Connect to the DCL(Reactor) Non-connect Lower side Upper side Connect to the Non-connect outdoor power circuit board (TABP1) – Connect to the outdoor power Connect to the outdoor power...

  • Page 70: Function Of Switches, Connectors And Jumpers

    9-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches Action by the switch operation Type of Switch Function Effective timing Switch When compressor is Forced defrost Start Normal working in heating operation. w Abnormal history clear Clear Normal off or operating No function —...
  • Page 71 MXZ-8A140VA MXZ-8A140VA MXZ-8A140VA 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) No function — — — No function — —...
  • Page 72 MXZ-8A140VA 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 — — — 5, 6 No function —...
  • Page 73 <Outdoor unit operation monitor function> Digital indicator LED3 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on outdoor controller. Operation indicator SW2 : Indicator change of self diagnosis Display detail Explanation for display Unit...
  • Page 74 Display detail Explanation for display Unit SW2 setting Pipe temperature / Liquid(TH3) – 40~90 – 40~90 (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.
  • Page 75 SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid(TH3) on error – 40~90 occurring (When the coil thermistor detects 0: or below, “–” – 40~90 and temperature are displayed by turns.) (Example) When –15:; 0.5 secs. 0.5secs. 2 secs.
  • Page 76 Setting details Display details Defrosting switch 0 : Normal 1 : For high humidity (Example) MXZ-8A140VA, “00” is displayed. Indoor pipe temperature / Liquid – 39~88 – 39~88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.)
  • Page 77 Display detail Explanation for display Unit SW2 setting Indoor setting temperature 17~30 17~30 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 / Cond./ –...
  • Page 78 SW2 setting Display detail Explanation for display Unit Target Sub-cool (Cooling mode) : SCm 0~255 2 3 4 5 6 Error postponement code history (2) Postponement code display of outdoor unit Blinking: During postponement Code Lighting: Cancellation of postponement display “00”...
  • Page 79 SW2 setting Display detail Explanation for display Unit Indoor pipe temperature / Liquid on – 39~88 error occurring (When the temperature is 0°C or less, “–” and – 39~88 temperature are displayed by turns.) Indoor unit 1 Indoor unit 2 (Example) Indoor unit 3 When –15°C;...
  • Page 80 SW2 setting Display detail Explanation for display Unit Thermostat-on time until error stops 0~999 0~999 (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. 0.5secs.
  • Page 81 <Branch box unit operation monitor function> [When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to branch box controller board(CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis SW2 setting...
  • Page 82 SW2 setting Display detail Explanation for display Unit LEV-B opening pulse 0~500 0~500 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns. Pulse (Example) 2 3 4 5 6 When 150 pulse; 0.5 secs. 0.5secs.
  • Page 83 SW2 setting Display detail Explanation for display Unit Indoor pipe temperature / Liquid – 35~88 (When the temperature is 0: or less, “–” and Indoor-B temperature are displayed by turns.) – 35~88 2 3 4 5 6 Indoor pipe temperature / Liquid –...
  • Page 84 SW2 setting Display detail Explanation for display Unit Outdoor heatsink temperature (TH8) – 40~200 – 40~200 (When the temperature is 0: or less, “–” and temperature are displayed by turns.) (When the thermistor detects 100: or more, 2 3 4 5 6 hundreds digit, tens digit and ones digit are displayed by turns.) LEV-6 opening pulse...
  • Page 85 SW2 setting Display detail Explanation for display Unit Branch pipe temperature – 39~88 TH-A 2 3 4 5 6 Branch pipe temperature – 39~88 TH-B 2 3 4 5 6 Branch pipe temperature – 39~88 TH-C 2 3 4 5 6 Branch pipe temperature –...
  • Page 86 SW2 setting Display detail Explanation for display Unit Indoor - setting temperature 16~31 16~31 Indoor-A 2 3 4 5 6 Indoor - setting temperature 16~31 16~31 Indoor-B 2 3 4 5 6 Indoor - setting temperature 16~31 16~31 Indoor-C 2 3 4 5 6 Indoor - setting temperature 16~31 16~31...

This manual is also suitable for:

Mxz-8a140va3Pac-ak50bcPac-ak30bcMxz-8a140va1Mxz-8a140va2

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