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Mitsubishi Electric SUZ-KA09NAH2.MX Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A
Outdoor unit
[Model Name]
SUZ-KA09NA2
SUZ-KA09NAH2
SUZ-KA12NA2
SUZ-KA12NAH2
SUZ-KA15NA2
SUZ-KA15NAH2
SUZ-KA09NA(H)2.MX
[Service Ref.]
SUZ-KA09NA2.MX
SUZ-KA09NAH2.MX
SUZ-KA12NA2.MX
SUZ-KA12NAH2.MX
SUZ-KA15NA2.MX
SUZ-KA15NAH2.MX
Air inlet
(back and side)
Piping
Air outlet
Drain hose
Drain outlet
Note:
This service manual describes
service data of the outdoor units
only.
CONTENTS
2. PART NAMES AND FUNCTIONS ...................... 2
3. SPECIFICATION ................................................. 3
4. OUTLINES AND DIMENSIONS .......................... 4
5. WIRING DIAGRAM ............................................ 5
7. DATA ................................................................. 10
8. ACTUATOR CONTROL .................................... 12
9. SERVICE FUNCTION ....................................... 13
10. TROUBLESHOOTING ...................................... 13
11. FUNCTION SETTING ....................................... 29
12. DISASSEMBLY INSTRUCTIONS ..................... 32
PARTS CATALOG (OCB699)
December 2018
No. OCH699
HFC
utilized
R410A

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Summary of Contents for Mitsubishi Electric SUZ-KA09NAH2.MX

  • Page 1: Table Of Contents

    SERVICE MANUAL R410A Outdoor unit Note: [Service Ref.] [Model Name] This service manual describes SUZ-KA09NA2.MX service data of the outdoor units SUZ-KA09NA2 only. SUZ-KA09NAH2 SUZ-KA09NAH2.MX SUZ-KA12NA2.MX SUZ-KA12NA2 SUZ-KA12NAH2 SUZ-KA12NAH2.MX SUZ-KA15NA2.MX SUZ-KA15NA2 SUZ-KA15NAH2 SUZ-KA15NAH2.MX CONTENTS Air inlet (back and side) 1. COMBINATION OF INDOOR AND OUTDOOR UNITS ... 2 2.

  • Page 2: Combination Of Indoor And Outdoor Units

    COMBINATION OF INDOOR AND OUTDOOR UNITS Outdoor unit Indoor unit Heat pump type SUZ- Service KA09 KA12 KA15 Service Ref. Manual No. NA(H)2.MX NA(H)2.MX NA(H)2.MX SLZ-KF09/12/15NA.TH OCH699 SEZ-KD09/12/15NA4R1.TH HWE08020 PEAD-A09/12/15AA7.MX HWE1608A SVZ-KP12NA.MX — — OBH802 MLZ-KP09/12NA-U1 — PART NAMES AND FUNCTIONS SUZ-KA09NA(H)2.MX    SUZ-KA12NA(H)2.MX   SUZ-KA15NA(H)2.MX Air inlet (back and side)

  • Page 3: Specification

    SPECIFICATION SUZ-KA09NA(H)2 SUZ-KA12NA(H)2 SUZ-KA15NA(H)2 Outdoor unit model Power supply V , phase , Hz 208/230 , 1 , 60 Max. fuse size (time delay) Min. circuit ampacity Fan motor F.L.A 0.50 Model KNB073FRVMC SNB092FQAMT SNB130FQBMT R.L.A Compressor L.R.A Refrigeration oil oz(L)/ 9.1(0.27)/(FV50S) 11.8(0.35)/(FV50S) 11.8(0.35)/(FV50S)

  • Page 4: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: inch(mm) SUZ-KA09NA(H)2.MX SUZ-KA12NA(H)2.MX SUZ-KA15NA(H)2.MX REQUIRED SPACE 4 in. (100 mm) or more when front and sides of the unit are clear (KA09/12/15NA) (KA09/12/15NAH) When any 2 sides of left, right and rear of the unit are clear holes Liquid refrigerant pipe joint Refrigerant pipe (flared)

  • Page 5: Wiring Diagram

    WIRING DIAGRAM SUZ-KA09NA2.MX SUZ-KA12NA2.MX OCH699...
  • Page 6 SUZ-KA09NAH2.MX SUZ-KA12NAH2.MX OCH699...
  • Page 7 SUZ-KA15NA2.MX OCH699...
  • Page 8 SUZ-KA15NAH2.MX OCH699...

  • Page 9: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM SUZ-KA09NA(H)2.MX  SUZ-KA12NA(H)2.MX  SUZ-KA15NA(H)2.MX Unit: Inch (mm) Refrigerant pipe ø3/8 (ø9.52) (KA09/12) ø1/2 (ø12.7) (KA15) 4-way valve (with heat insulator) Muffler Outdoor heat exchanger Stop valve temperature (with service port) thermistor Outdoor Muffler RT68 Discharge heat Flared connection exchanger temperature Service Service port...

  • Page 10: Data

    DATA STANDARD OPERATION DATA SEZ-KD09NA4 SEZ-KD12NA4 SEZ-KD15NA4 Representative matching Item Unit Cooling Heating Cooling Heating Cooling Heating Capacity BTU/h 9000 12000 12000 15000 15000 18000 0.82 — 0.82 — 0.86 — Input 0.93 1.33 1.15 1.44 SEZ-KD09NA4 SEZ-KD12NA4 SEZ-KD15NA4 Indoor unit Power supply (V, phase, Hz) 230, 1, 60 Input...
  • Page 11 PEAD-A09AA7 PEAD-A12AA7 PEAD-A15AA7 Representative matching Item Unit Cooling Heating Cooling Heating Cooling Heating Capacity BTU/h 9000 12000 12000 15000 15000 18000 — — — Input 0.72 0.93 1.16 1.15 1.35 PEAD-A09AA7 PEAD-A12AA7 PEAD-A15AA7 Indoor unit Power supply (V, phase, Hz) 230, 1, 60 Input 0.07...

  • Page 12: Actuator Control

    ACTUATOR CONTROL 8-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running. 5 seconds 15 seconds Compressor...

  • Page 13: Service Function

    SERVICE FUNCTION 9-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to "10-6. TEST POINT DIAGRAM AND VOLTAGE".) Defrost nish temperature Jumper SUZ-KA09/12/15 Soldered 41°F (5°C)
  • Page 14 10-2. TROUBLE SHOOTING CHECK TABLE SUZ-KA09NA(H)2.MX  SUZ-KA12NA(H)2.MX  SUZ-KA15NA(H)2.MX check No. Symptoms Condition Remedy Abnormal point/ Condition code indication Overcurrent protection cut-out operates 3 consecutive times Outdoor 1-time blink Outdoor power system AHow to check inverter/ within 1 minute after the compressor gets started. unit does not every compressor”.
  • Page 15 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" As this air conditioner has a function to memorize all the failures that had occurred, the latest failure detail can be recalled by following the procedure below. Use this function when the check code is not displayed with wired remote controller or the re- mote controller at use is wireless type.
  • Page 16 10-3-2. Self-diagnosis <Wireless remote controller> <In case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1.
  • Page 17 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
  • Page 18 10-4. TROUBLE CRITERION OF MAIN PARTS SUZ-KA09NA(H)2.MX    SUZ-KA12NA(H)2.MX    SUZ-KA15NA(H)2.MX Part name Check method and criterion Figure Defrost thermistor (RT61) Measure the resistance with a tester. Fin temperature thermistor (RT64) VOLTAGE”, for the chart of thermistor. Ambient temperature ther- mistor (RT65) Outdoor heat exchanger tem- perature thermistor (RT68) Measure the resistance with a tester.

  • Page 19: Troubleshooting Flow

    10-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector (CN61) between compressor and the intelligent power module (IPM). See 10-5. Check the voltage between terminals. Are the voltages balanced? Replace the inverter P.C. board. Check the compressor. See 10-5. B Check of open phase the inverter is normal by measuring the voltage balance between the terminals.
  • Page 20 D Check of compressor winding compressor terminals. <Measurement point> Measure the resistance between the lead wires at 3 points. BK - WH BK - RD WH - RD <Judgement> Refer to "10-4. TROUBLE CRITERION OF MAIN PARTS". ················· Abnormal [short] ········...
  • Page 21 G Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P.C. board (see below table), and measure the resistance of thermistor. Is the resistance of thermistor normal? Replace the thermistor except RT64. When RT64 is (Refer to "10-6.TEST POINT DIAGRAM AND VOLTAGE".) abnormal, replace the inverter P.C.
  • Page 22 I Check of outdoor fan motor Check the connection between the connector CN931 and CN932. Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Is the resistance between each ter- minal of outdoor fan motor normal? (Refer to 10-4.) Disconnect CN932 from the inverter P.C.
  • Page 23 J Check of power supply Disconnect the connector between compressor and intelligent power module. Turn ON power supply and press Rectify indoor/outdoor the TEST button twice on the indoor connecting wire. unit or remote controller. Is there voltage 208/230 VAC Replace the indoor Does the POWER lamp on remote electronic control P.C.
  • Page 24 L Check of inverter P.C. board Check the outdoor fan motor. (Refer to "10-5. . Check of outdoor fan motor".) Is the fuse (F901) blown on the inverter P.C. board? Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct.
  • Page 25 M How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Is there rated voltage between the outdoor terminal block S1 and S2? Check the wiring.
  • Page 26 N Check the defrost heater SUZ-KA09/12/15NAH2 Check the following points before checking electric continuity. 1. Does the resistance of ambient temperature thermistor have the characteristics? Refer to 10-6.1. 2. Is the resistance of defrost heater normal? Refer to 10-4. 3. Is the heater protector closed? 4.
  • Page 27 P Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft., or is the indoor unit, and/or the antennas and the the distance between the antennas and outdoor unit.
  • Page 28 10-6. TEST POINT DIAGRAM AND VOLTAGE Inverter P.C. board SUZ-KA09NA(H)2.MX   SUZ-KA12NA(H)2.MX SUZ-KA15NA(H)2.MX Smoothing R.V.coil Heater connector capacitor (C63) (CN722) (CN721) Smoothing Smoothing DB61 Back side of unit (SUZ-KA09/ 208/230 VAC capacitor (C62) capacitor (C61) 260 - 370 VDC 12/15NAH2) Fuse (F701) Fuse (F801) 208/230 VAC T3.15AL250V...

  • Page 29: Function Setting

    FUNCTION SETTING 11-1. UNIT FUNCTION SETTING BY 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. <Table 1>...

  • Page 30: Service Menu

    11-1-1. Selecting functions using the wired remote controller <PAR-3xMAA ("x" represents 0 or later)> <Service menu> Maintenance password is required Select "Service" from the Main menu, and press the button. Main Main menu Maintenance Initial setting *At the main display, the menu button and select "Service" to make the Service maintenance setting.
  • Page 31 <Function setting> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Function setting" with the F1 or F2 button, and press the button. Function setting Set the indoor unit refrigerant addresses and unit numbers with the F1 Ref.

  • Page 32: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types (refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 33 OPERATING PROCEDURE PHOTOS/FIGURES Photo 4 Photo 5 Screws of the Screw of the conduit cover conduit plate 2. Removing the inverter assembly, inverter P.C. board Photo 6 (1) Remove the cabinet and panels. (Refer to 1.) Screws of the heat sink (2) Disconnect the lead wire to the reactor and the following support and the separator connectors:...
  • Page 34 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the discharge temperature thermistor, Photo 8 defrost thermistor, outdoor heat exchanger tempera- Screw of the R.V. coil ture thermistor and ambient temperature thermistor (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following con- nectors: <Inverter P.C.
  • Page 35 OCH699...
  • Page 36 HEAD OFFICE: TOKYO BUILDING., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Published : Dec. 2018 No.OCH699 Made in Japan...

This manual is also suitable for:

Suz-ka09na2.mxSuz-ka12na2.mxSuz-ka15nah2.mxSuz-ka12nah2.mxSuz-ka15na2.mx

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