Mitsubishi Electric Mr. Slim PKA-A24KA Service Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Air Conditioner
  5. Mr. Slim PKA-A24KA
  6. Service manual
Mitsubishi Electric Mr. Slim PKA-A24KA Service Manual

Mitsubishi Electric Mr. Slim PKA-A24KA Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model names]
[Service Ref.]
PKA-A24KA.TH
PKA-A24KA
PKA-A30KA.TH
PKA-A30KA
PKA-A36KA.TH
PKA-A36KA
PKA-A24KAL.TH
PKA-A24KAL
PKA-A30KAL.TH
PKA-A30KAL
PKA-A36KAL.TH
PKA-A36KAL
INDOOR UNIT
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
COOL
DRY
AUTO
FAN
HEAT
WIRELESS REMOTE
CONTROLLER
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PART NAMES AND FUNCTIONS ................... 4
4. SPECIFICATIONS ............................................ 7
5. NOISE CRITERION CURVES .......................... 8
6. OUTLINES AND DIMENSIONS ....................... 9
7. WIRING DIAGRAM .........................................10
8. REFRIGERANT SYSTEM DIAGRAM ............ 11
9. TROUBLESHOOTING .................................... 12
10. SPECIAL FUNCTION ..................................... 26
11. DISASSEMBLY PROCEDURE ....................... 29
PARTS CATALOG (OCB457)
3 3 2 2 3
March 2009
No. OCH457
NOTE:
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on the
spec name plate.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Mr. Slim PKA-A24KA and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Mitsubishi Electric Mr. Slim PKA-A24KA

Summary of Contents for Mitsubishi Electric Mr. Slim PKA-A24KA

  • Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS March 2009 No. OCH457 SERVICE MANUAL Indoor unit [Model names] [Service Ref.] NOTE: • This manual describes PKA-A24KA.TH PKA-A24KA only service data of the indoor units. • RoHS compliant products PKA-A30KA.TH PKA-A30KA have <G>...
  • Page 2 REFERENCE MANUAL 1-1. OUTDOOR UNIT SERVICE MANUAL Service Ref. Service Manual No. PUZ-A24/30/36NHA3 OCH458 PUZ-A24/30/36NHA3-BS PUY-A24/30/36NHA3 OCB458 PUY-A24/30/36NHA3-BS OCH426 PUZ-HA30/36NHA2 OCB426 1-2. TECHNICAL DATA BOOK Series (Outdoor unit) Data Book No. PUZ-A·NHA3(-BS) OCS14 PUY-A·NHA3(-BS) PUZ-HA·NHA2 OCS15...
  • Page 3 SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising 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 Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool name Specifications Gauge manifold · Only for R410A · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·...
  • Page 5 Wired remote controller “Sensor” indication Display Section Day-of-Week Displayed when the remote controller sensor is used. Shows the current day of the week. For purposes of this explanation, all parts of the display are shown Time/Timer Display as lit. During actual operation, only “Locked”...
  • Page 6 Wireless remote controller display CHECK TEST RUN Indicate that the unit is being checked or test-run. display display MODEL SELECT Blinks when model is selected. Lights up while the signal is transmitted to the indoor unit when the button is pressed. Temperature setting display Indicates the desired temperature setting which is set.
  • Page 7 SPECIFICATIONS Service Ref. PKA-A24KA.TH, PKA-A24KAL.TH Power supply(phase, cycle, voltage) 1 phase, 60Hz, 208/230V Max. Fuse Size Min.Circuit Ampacity External finish White Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan(drive) Line flow fan (direct) 0.056 Fan motor output Fan motor 0.36 F.L.A Dry: 18-20-22 (635-705-775)
  • Page 8 NOISE CRITERION CURVES PKA-A24KA PKA-A24KA.TH PKA-A36KA.TH SPL(dB) LINE NOTCH NOTCH SPL(dB) LINE High PKA-A30KA High PKA-A30KA.TH PKA-A36KAL.TH PKA-A24KAL PKA-A24KAL.TH PKA-A30KAL PKA-A30KAL.TH 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 NC-20 HEARING FOR NC-20 CONTINUOUS...

  • Page 9: Pka-A24Ka.th

    OUTLINES AND DIMENSIONS PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH Unit: inch (mm) Top side 16-11/16(423.7) 17(431.7) Left side Right side Front side Mount board Knock out hole for left piping 9-1/2(241) 2-29/32(74) 33-21/32(855) 3/16(5) 11-5/8(295) 46-1/16(1170) Operation lamp Front side(Grille open) Knock out hole for right piping DEFROST/STAND BY lamp...
  • Page 10 WIRING DIAGRAM PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH Notes: 1.SymboIs used in wiring diagram above are, : Connector, : Terminal (block). 2.Indoor and outdoor connecting wires have poIarities, make sure to match terminal numbers (S1, S2, S3)for correct wirings. 3.Since the outdoor side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for servicing.
  • Page 11 REFRIGERANT SYSTEM DIAGRAM PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH2 Refrigerant flow in cooling Pipe temperature(Liquid) Refrigerant flow in heating Thermistor TH5 (Cond./ Eva.temperature) Refrigerant LIQUID pipe connection (Flare) Thermistor TH1 (Room temperature) Strainer (#50) Distributor...
  • Page 12 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 or controller board of outdoor unit. Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents below before investigating details.
  • Page 13 • 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 14 • On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp • On wired remote controller Check code displayed in the LCD. (Refer to the previous page, check code.) • If the unit cannot be operated properly after the test run, refer to the following table to find out the cause. Symptom Cause Wired remote controller...
  • Page 15 Note: Refer to the manual of outdoor unit for the details of display 9-3. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Abnormal point and detection method Countermeasure Error Code Cause Room temperature thermistor (TH1) Defective thermistor – Check resistance value of thermistor.
  • Page 16 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is work- (Cooling or drying mode) (Cooling or drying mode) Clogged filter (reduced airflow) Check clogs of the filter. Freezing protection (Cooling mode) Short cycle of air path Remove shields. The unit is in 6-minute resume prevention Low load (low temperature) mode if pipe <liquid or condenser/evapo-...
  • Page 17 Abnormal point and detection method Countermeasure Error Code Cause Pipe temperature thermistor/ Defective thermistor – Check resistance value of thermistor. Condenser-Evaporator (TH5) characteristics For characteristics, refer to (P1) above. Check contact failure of connector (CN44) on The unit is in 3-minute resume protec- Contact failure of connector the indoor controller board.
  • Page 18 Abnormal point and detection method Countermeasure Error Code Cause Remote controller transmission error(E3)/signal receiving error(E5) 2 remote controllers are set as Set a remote controller to main, and the “main.” other to sub. Abnormal if remote controller could not find blank of transmission path for 6 sec- (In case of 2 remote con- onds and could not transmit.
  • Page 19 9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. is off. Power supply of rated voltage is not supplied to out- Check the voltage of outdoor power door unit.
  • Page 20 Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (2)LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire is blinking. Connection failure of indoor/outdoor unit connecting for connection failure.
  • Page 21 9-5. EMERGENCY OPERATION 9-5-1. When wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote controller malfunctions, the emergency operation can be done using the emergency buttons.
  • Page 22 9-6. HOW TO CHECK THE PARTS PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH1) (At the ambient temperature 50 F~86 F) Liquid pipe thermistor Normal Abnormal (TH2)
  • Page 23 9-6-2. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. board and fan motor.) (It causes trouble of the indoor controller circuit Self check...
  • Page 24 9-7. TEST POINT DIAGRAM Indoor controller board PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH CNMF PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH Connect to the fan motor (MF) 1-3 : DC294~325V 4-3 : DC15V 5-3 : DC0~6.5V 6-3 : DC0 or DC15V CN01 Connect to the Terminal block (TB4) 1-3 : 208/230VAC Emergency FUSE...

  • Page 25: Wireless Remote Controller

    9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on control P.C. board. (Marks in the table below) Jumper wire ( : Short : Open) Jumper wire Setting by the dip switch and jumper wire Remarks Functions MODELS...
  • Page 26 SPECIAL FUNCTION 10-1. Rotation Function (and back-up function, 2nd stage cut-in function) Only PKA-A·KA (Wired remote controller use model) 10-1-1. Operation (1) Rotation function (and Back-up function) Outline of functions · Main and sub units operate alternately according to the interval of rotation setting. w Main and sub unit should be set by refrigerant address.

  • Page 27: Note

    System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 20:(68°F) [2nd stage cut-in function]··· Request code number "322~324" Set point = 26:(79°F) When request code number is “323”. Room temp. Set point Room temp.
  • Page 28 (2) Setting method of each function by wired remote controller B: Refrigerant address C: Data display area D: Request code display area 1. Stop operation( ). 2. Press the button ( ) for 3 seconds so that [Maintenance mode] appears on the screen ( ). TEST After a while, [00] appears in the refrigerant address number display area.(at 3.
  • Page 29 DISASSEMBLY PROCEDURE PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH Be careful when removing heavy parts. PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE PANEL Front grille Screws Photo 1 (1) Press and unlock the knobs on both sides of the front grille and lift the front grille until it is level.
  • Page 30 OPERATION PROCEDURE PHOTOS Terminal block (TB4) 3. REMOVING THE ELECTRICAL BOX Photo 4 (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the front and side electrical box covers (each 1 Indoor controller screw). board (I.B.) (3) Remove the indoor / outdoor connecting wire from termi- Connector nal block (TB4).
  • Page 31 OPERATION PROCEDURE PHOTOS 6. REMOVING THE INDOOR FAN MOTOR AND THE Photo 7 Screw of the motor band LINE FLOW FAN Lead wire of pipe ther- mistor (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical box (Refer to 2.) and the nozzle assembly (Refer to 3.).
  • Page 32 (TH1) HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN New publication, effective Mar. 2009 Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Specifications subject to change without notice Distributed in Mar. 2009 No.OCH457 PDF 6 Made in Japan...

  • Page 33: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS March 2009 No. OCB457 PARTS CATALOG Indoor unit Note: [Model names] [Service Ref.] • RoHS compliant products PKA-A24KA.TH have <G> mark on the spec PKA-A24KA name plate. PKA-A30KA.TH PKA-A30KA PKA-A36KA.TH PKA-A36KA PKA-A24KAL.TH PKA-A24KAL PKA-A30KAL.TH PKA-A30KAL...

  • Page 34: Rohs Parts List

    RoHS PARTS LIST PANEL AND HEAT EXCHANGER PARTS PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH...
  • Page 35 Q'ty/set Wiring Recom- Remarks Part No. Part Name Specifi cation PKA-A•KA(L).TH Diagram mended (Drawing No.) Symbol Q'ty 24, 30 E12 C92 970 INSTALLATION PLATE E12 D20 234 BOX E17 491 000 PANEL ASSEMBLY E12 408 142 CATCH 2pcs/set E12 C92 067 SCREW CAP 3pcs/set E12 C92 010 FRONT PANEL (NW) E12 C92 100 CATECHIN AIR FILTER...
  • Page 36 FUNCTIONAL PARTS PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH TEMP. ON/OFF...
  • Page 37 Part numbers that are circled are not shown in the illustration. Q'ty/set Wiring Recom- Remarks Part No. Part Name Specifi cation PKA-A24, 30, 36 Diagram mended (Drawing No.) Symbol Q'ty KA.TH KAL.TH G E12 C92 302 LINE FLOW FAN G E12 751 509 BEARING MOUNT G E12 001 504 SLEEVE BEARING G E12 408 702 DRAIN HOSE G E17 515 235 NOZZLE ASSEMBLY...
  • Page 40 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Mar. 2009 No. OCB457 PDF 6 New publication, effective Mar. 2009 Made in Japan Specifications subject to change without notice...

This manual is also suitable for:

Mr. slim pka seriesMr. slim pka-a30kaMr. slim pka-a36kaMr. slim pka-a24kalMr. slim pka-a30kalMr. slim pka-a36kal ... Show all

Table of Contents