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Mitsubishi Electric SUZ-KA09NAHZ Service Manual
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Mitsubishi Electric SUZ-KA09NAHZ Service Manual

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SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model Name]
SUZ-KA09NAHZ
SUZ-KA12NAHZ
SUZ-KA15NAHZ
SUZ-KA18NAHZ
SUZ-KA09NAHZ.TH
R410A
[Service Ref.]
SUZ-KA09NAHZ.TH
SUZ-KA12NAHZ.TH
SUZ-KA15NAHZ.TH
SUZ-KA18NAHZ.TH
Revision:
• 3.SPECIFICATION has
been revised in REVISED
EDITION-A.
OCH709 is void.
Note:
• This manual describes
CONTENTS
2. PART NAMES AND FUNCTIONS ...................... 2
3. SPECIFICATION ................................................. 3
4. OUTLINES AND DIMENSIONS .......................... 4
5. WIRING DIAGRAM ............................................ 5
7. DATA ................................................................... 9
8. ACTUATOR CONTROL ..................................... 14
9. SERVICE FUNCTIONS ...................................... 15
10. TROUBLESHOOTING ....................................... 15
11. FUNCTION SETTING ........................................ 32
12. DISASSEMBLY INSTRUCTIONS ...................... 35
PARTS CATALOG (OCB709)
December 2019
No. OCH709
REVISED EDITION-A
service data of the outdoor
units only.

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Summary of Contents for Mitsubishi Electric SUZ-KA09NAHZ

  • Page 1: Table Of Contents

    December 2019 No. OCH709 SERVICE MANUAL R410A REVISED EDITION-A Outdoor unit [Service Ref.] Revision: [Model Name] • 3.SPECIFICATION has SUZ-KA09NAHZ.TH SUZ-KA09NAHZ been revised in REVISED EDITION-A. OCH709 is void. SUZ-KA12NAHZ.TH SUZ-KA12NAHZ Note: • This manual describes service data of the outdoor units only.

  • Page 2: Combination Of Indoor And Outdoor Units

    COMBINATION OF INDOOR AND OUTDOOR UNITS Outdoor unit Indoor unit SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH Service Service Ref. Manual No. ○ ○ ○ ○ OCH669 SLZ-KF09/12/15/18NA OCB669 ○ ○ ○ ○ HWE08020 SEZ-KD09/12/15/18NA4 BWE10180 ○ ○ ○ ○ HWE16080 PEAD-09/12/15/18AA7 BWE016290 ○...

  • Page 3: Specification

    SPECIFICATION SUZ-KA09 SUZ-KA12 SUZ-KA15 SUZ-KA18 Outdoor unit model NAHZ NAHZ NAHZ NAHZ Power supply V , phase , Hz 208/230 , 1 , 60 Max. fuse size (time delay) Min. circuit ampacity Fan motor F.L.A 0.67 1.00 Model SNB130FHBM2T SNB220FQGMT R.L.A 10.0 13.0...

  • Page 4: Outlines And Dimensions

    OUTLINES AND DIMENSIONS SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH Unit: inch REQUIRED SPACE *1 20 in. (500 mm) or more when front and sides of the unit are clear 16-7/16 Air in 1-9/16 Air in Air out 2-holes 13/32 13/16 6-7/8 19-11/16...

  • Page 5: Wiring Diagram

    WIRING DIAGRAM SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH OCH709A...
  • Page 6 SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH OCH709A...

  • Page 7: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH Unit: inch (mm) Muffler 4-way Refrigerant pipe ø3/8 ( ø 9.52) valve (with heat insulator) Service port Stop valve (with service port) Strainer Outdoor #100 Flared connection Discharge heat Defrost temperature exchanger Service thermistor thermistor...
  • Page 8 MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping: ft. Piping size O.D: in. Model Max. Length Max. Height difference Liquid SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA15NAHZ SUZ-KA18NAHZ Indoor unit Max. Height difference Max. Length Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R410A: oz.) No additional refrigerant charge up to the maximum refrigerant piping length.

  • Page 9: Data

    0.07 0.05 0.09 0.07 0.09 0.07 Current 0.50 0.39 0.57 0.46 0.74 0.63 0.74 0.63 Outdoor unit SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA15NAHZ SUZ-KA18NAHZ Power supply (V, phase, Hz) 230, 1, 60 Input 0.63 1.26 0.85 1.07 1.11 1.85 1.28 1.77 Current 5.41 3.42...
  • Page 10 0.02 0.02 0.03 0.03 0.04 0.04 Current 0.20 0.15 0.24 0.19 0.32 0.27 0.43 0.38 Outdoor unit SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA15NAHZ SUZ-KA18NAHZ Power supply (V, phase, Hz) 230, 1, 60 Input 0.58 0.80 0.92 1.15 1.07 1.80 1.98 Current 2.41 3.42 3.85...
  • Page 11 0.09 0.07 0.11 0.09 0.11 0.09 Current 0.54 0.43 0.67 0.56 0.95 0.84 0.95 0.84 Outdoor unit SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA15NAHZ SUZ-KA18NAHZ Power supply (V, phase, Hz) 230, 1, 60 Input 0.58 0.86 0.76 1.05 1.08 1.62 1.29 Current 2.29 3.53 3.03...
  • Page 12 Representative matching SVZ-KP12NA SVZ-KP18NA Item Unit Cooling Heating Cooling Heating Capacity BTU/h 12,000 15,000 18,000 21,600 – 0.92 0.93 Input 0.86 1.10 1.44 1.88 Indoor unit SVZ-KP12NA SVZ-KP18NA Power supply (V, phase, Hz) 230, 1, 60 Input 0.10 0.10 0.16 0.16 Current 0.90...
  • Page 13 Power supply (V, phase, Hz) 230, 1, 60 Input 0.04 0.04 0.04 0.04 0.04 0.04 Current 0.30 0.30 0.30 0.30 Outdoor unit SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA18NAHZ Power supply (V, phase, Hz) 230, 1, 60 Input 0.68 0.80 0.90 1.09 1.295 1.74 Current 2.83 3.35 3.79...

  • Page 14: 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 15: Service Functions

    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 finish temperature SUZ-KA09NAHZ SUZ-KA15NAHZ Jumper SUZ-KA12NAHZ SUZ-KA18NAHZ Soldered 48°F (9°C)
  • Page 16 10-2. TROUBLESHOOTING CHECK TABLE check No. Symptoms Condition Remedy code Abnormal point/ Condition indication Outdoor power system Overcurrent protection cut-out operates 3 consecutive times within 1 • Reconnect connector of compressor. minute after the compressor gets started. • Refer to “10-5.A How to check check Symptoms Condition...
  • Page 17 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-4xMAA ("x" represents 0 or later)> Select "Service" from the Main menu, Diagnosis and press the [SELECT] button. Self check Remote controller check Select "Check" from the Service menu, and press the [SELECT] button. Service menu: MENU Cursor Select "Diagnosis"...
  • Page 18 10-3-2. Remote controller check <PAR-4xMAA ("x" represents 0 or later)> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press Diagnosis Self check the [SELECT] button. Remote controller check Select "Check"...
  • Page 19 10-3-3. Malfunction-diagnosis method by IR wireless remote controller <In the 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> Refrigerant address [Procedure]...
  • Page 20 • 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 s 0.5 s 0.5 s. 0.5 s Approx.
  • Page 21 10-4. TROUBLE CRITERION OF MAIN PARTS SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH Part name Check method and criterion Figure Defrost thermistor (RT61) Measure the resistance with a tester. Fin temperature Refer to “Inverter P.C. board” in "10-6. TEST POINT DIAGRAM AND thermistor (RT64) VOLTAGE”, for the chart of thermistor.
  • Page 22 10-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector (CN61) between compressor and the intelligent power module (IPM). Check the voltage between terminals. See 10-5. “Check of open phase”. Are the voltages balanced? Replace the inverter P.C. board. See 10-5.
  • Page 23 D Check of compressor winding ● Disconnect the connector between the compressor and intelligent power module, and measure the resistance between the compressor terminals. <Measurement point> Measure the resistance between the lead wires at 3 points. BK - WH BK - RD WH - RD <Judgement>...
  • Page 24 Does the unit operate for 10 minutes or more Replace the inverter P.C. board. without showing thermistor abnormality? (Cause is poor contact.) Connector, Pin No. Thermistor Symbol Board SUZ-KA09NAHZ SUZ-KA15NAHZ SUZ-KA12NAHZ SUZ-KA18NAHZ Defrost RT61 Between CN641 pin1 and pin2 Between CN671 pin1 and pin2 Discharge temperature...
  • Page 25 I Check of outdoor fan motor Check the connection between the connector CN931 and CN932. Is the resistance between each termi- nal of outdoor fan motor normal? (Refer to"10-4. TROUBLE CRITERION OF MAIN PARTS".) Disconnect CN932 from the inverter P.C. board, and turn on the power supply.
  • Page 26 K Check of LEV Start Turn on power supply to the outdoor unit after checking Normal LEV coil is fixed to the LEV body securely. Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand? Disconnect the connector CN724 is there nor- Replace the inverter P.C.
  • Page 27 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 outdoor terminal block S1 and S2? Check the wiring.
  • Page 28 N Check the defrost heater (base pan heater) 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.
  • Page 29 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 30 10-6. TEST POINT DIAGRAM AND VOLTAGE Inverter P.C. board SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH R.V.coil Smoothing Smoothing (CN721) Defrost heater DB61 Smoothing Back side of unit capacitor capacitor 208/230 V AC (CN722) 260 - 370 V DC capacitor (C61) (C62) (C63) 208/230 V AC...
  • Page 31 SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH Jumper wire for pre-heat control setting (JK) LEV (CN724) Jumper wire for changing defrost setting (JS) Ambient temperature thermistor/RT65 (CN672) Heater (CN601) Outdoor heat exchanger 208/230 V AC temperature thermistor R.V. coil (CN602) /RT68 (CN671) 208/230 V AC Discharge temperature thermistor/RT62 (CN671)

  • Page 32: 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 33 11-1-1. Selecting functions using the wired remote controller (PAR-4xMAA) <Service menu> Maintenance password is required Main Main menu Select "Service" from the Main menu, and press the [SELECT] button. *At the main display, the menu button and select "Service" to make Service the maintenance setting.
  • Page 34 <Function setting> Settings menu Function setting Select "Service" from the Main menu, and press the [SELECT] button. Service menu: MENU Select "Setting" from the Service menu, and press the [SELECT] button. Select "Function setting", and press the [SELECT] button. SELECT MENU RETURN HOLD...

  • Page 35: Disassembly Instructions

    Locking lever lever. Connector SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES Screws of the top panel 1.
  • Page 36 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the inverter assembly, inverter P.C. board Photo 5 Screws of the terminal block (1) Remove the cabinet and panels. (Refer to 1.) Screw of the heat sink support and the back panel (2) Disconnect the lead wire to the reactor and the following con- support and the separator Screws of nectors:...
  • Page 37 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the discharge temperature thermistor, Photo 8 defrost thermistor, outdoor heat exchanger tempera- Outdoor heat exchanger Ambient temperature temperature thermistor thermistor 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 connectors: <Inverter P.C.
  • Page 38 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2019 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Issued: Dec. 2019 No.OCH709 REVISED EDITION-A Published : Nov. 2019 No.OCH709 Made in Japan...

This manual is also suitable for:

Suz-ka15nahz suz-ka12nahzSuz-ka18nahzSuz-ka09nahz.thSuz-ka12nahz.thSuz-ka15nahz.thSuz-ka18nahz.th

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