Mitsubishi Electric Mr.SLIM PCA-RP50KAQ Service Manual
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Mitsubishi Electric Mr.SLIM PCA-RP50KAQ Service Manual

Split-type, heat pump air condintioner
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See also: Service Manual , Installation Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS

SERVICE MANUAL

Indoor unit
[Model names]
[Service Ref.]
PCA-RP50KAQ
PCA-RP50KAQ
PCA-RP60KAQ
PCA-RP60KAQ
PCA-RP71KAQ
PCA-RP71KAQ
PCA-RP100KAQ
PCA-RP100KAQ
PCA-RP125KAQ
PCA-RP125KAQ
PCA-RP140KAQ
PCA-RP140KAQ
INDOOR UNIT
ON/OFF
TEMP
WIRELESS REMOTE
CONTROLLER
(Option)
indication
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
(Option)
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PART NAMES AND FUNCTIONS .................... 4
4. SPECIFICATIONS ............................................ 7
5. NOISE CRITERION CURVES ...................... 10
6. OUTLINES AND DIMENSIONS ..................... 12
7. WIRING DIAGRAM ............................................. 15
9. TROUBLESHOOTING ................................... 17
10. SPECIAL FUNCTION ..................................... 32
11. DISASSEMBLY PROCEDURE ....................... 35
PARTS CATALOG (OCB491)
December 2010
No. OCH491
NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the
spec name plate.

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS December 2010 No. OCH491 SERVICE MANUAL Indoor unit [Model names] [Service Ref.] NOTE: • This manual describes only PCA-RP50KAQ PCA-RP50KAQ service data of the indoor units. • RoHS compliant products PCA-RP60KAQ PCA-RP60KAQ have <G>...

  • Page 2: Reference Manual

    REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Service Ref. Service Manual No. PUHZ-RP50/60/71VHA4 PUHZ-RP100/125/140VKA OCH451 PUHZ-RP100/125/140/200/250YKA OCB451 PUHZ-RP200YKAR1 PU(H)-P71/100VHAR3.UK OC379 PU(H)-P71/100/125/140YHAR3.UK PUHZ-P100/125/140VHA3R2.UK OCH415 / OCB415 PUHZ-P100/125/140YHAR1.UK PUHZ-P200/250YHA3R2 OCH424 / OCB424 SUZ-KA50/60/71VA2.TH OCH472 SUZ-KA50/60/71VA2.TH-A OCH473 1-2. TECHNICAL DATA BOOK Series (Outdoor unit) Manual No.

  • Page 3: Safety Precaution

    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. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrige- the followings.

  • Page 4: Part Names And Functions

    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: Clock Button

    Wireless remote controller (Option) CHECK TEST RUN display Indicate that the unit is being checked or test-run. MODEL SELECT display display 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 6: Operation Section

    Wired remote controller (Option) “Sensor” indication Display Section Day-of-Week Displays 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 During actual operation, only “Locked”...

  • Page 7: Specifications

    SPECIFICATIONS 4-1. SPECIFICATIONS Service Ref. PCA-RP50KAQ Mode Cooling Heating Power supply(phase, cycle, voltage) Single phase, 50Hz, 230V Input 0.05 0.05 Running current 0.37 0.37 External finish Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan(drive) × No. Sirocco fan (direct) x 2 Fan motor output 0.090 Airflow(Low-Medium2-Medium1-High)
  • Page 8 Service Ref. PCA-RP100KAQ Mode Cooling Heating Power supply(phase, cycle, voltage) Single phase, 50Hz, 230V Input 0.09 0.09 Running current 0.65 0.65 External finish Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan(drive) × No. Sirocco fan (direct) × 4 Fan motor output 0.160 Airflow(Low-Medium2-Medium1-High) /min(CFM)
  • Page 9 4-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS ■ PCA-RP60, 71KAQ ■ PCA-RP50KAQ -100 -100 -150 -150 -200 -200 -250 -250 -300 -300 Airflow rate[m³/min] Airflow rate[m³/min] How to read curves ■ PCA-RP100, 125, 140KAQ Duct characteristics Curve in the at site graphs Q …...

  • Page 10: Noise Criterion Curves

    NOISE CRITERION CURVES PCA-RP50GA PCA-RP50KAQ PCA-RP60KAQ NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High PCA-RP50GA#1 High Medium1 Medium1 PCH-P50GAH Medium2 Medium2 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 HEARING FOR NC-20 NC-20 CONTINUOUS...
  • Page 11 PCA-RP125KAQ PCA-RP140GA PCA-RP140KAQ PCA-RP140GA NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High PCA-RP140GA#1 PCA-RP140GA#1 Medium1 Medium1 PCH-P140GAH PCH-P140GAH Medium2 Medium2 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 HEARING FOR NC-20 NC-20 CONTINUOUS...

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PCA-RP50KAQ Unit : mm...
  • Page 13 PCA-RP60, 71KAQ Unit : mm...
  • Page 14 PCA-RP100, 125, 140KAQ Unit : mm...

  • Page 15: Wiring Diagram

    WIRING DIAGRAM PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ [LEGEND] SYMBOL NAME SYMBOL NAME The black square(■)indicates a switch INDOOR CONTROLLER BOARD TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) position. CN2L CONNECTOR (LOSSNAY) TB5,TB6 TERMINAL BLOCK (REMOTE CONTROLLER <Table 1> TRANSMISSION LINE) CN32 CONNECTOR (REMOTE SWITCH) SW1 (MODEL SELECTION) <Table 2>SW2 (CAPACITY CODE)

  • Page 16: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ Strainer Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (TH2) thermistor (TH1) Strainer Distributor...

  • Page 17: Model Name 9. 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 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 18 9-2. MALFUNCTION-DIAGNOSIS METHOD BY 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> ■Wireless remote controller(Option) [Procedure] 1.
  • Page 19 • 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 flash pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
  • Page 20 • 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. • If the unit cannot be operated properly after test run, refer to the following table to find the cause. Symptom Cause Wired remote controller...

  • Page 21: High

    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 1 Defective thermistor 1–3 Check resistance value of thermistor. Room temperature thermistor (TH1) 1 The unit is in 3-minute resume characteristics...
  • Page 22 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is oper- (Cooling or drying mode) (Cooling or drying mode) 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. ating 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove blockage.
  • Page 23 Abnormal point and detection method Countermeasure Error Code Cause 1 Defective thermistor 1–3 Check resistance value of thermistor. Pipe temperature thermistor/ Condenser-Evaporator (TH5) characteristics For characteristics, refer to (P1) above. 2 Check contact failure of connector (CN44) 1 The unit is in 3-minute resume protec- 2 Contact failure of connector on the indoor controller board.
  • Page 24 Abnormal point and detection method Countermeasure Error Code Cause 1 Contact failure, short circuit or, Indoor/outdoor unit communication * Check LED display on the outdoor control circuit board. (Connect A-control service error (Signal receiving error) miswiring (converse wiring) of 1 Abnormal if indoor controller board tool, PAC-SK52ST.) indoor/outdoor unit connecting Refer to outdoor unit service manual.

  • Page 25: Troubleshooting By Inferior Phenomena

    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. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power is off.
  • Page 26 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 27: Emergency Operation

    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 control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.
  • Page 28 9-6. HOW TO CHECK THE PARTS PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature of 10°C~30°C) Liquid pipe thermistor (TH2) Normal Abnormal (Refer to Thermistor characteristic graph.)
  • Page 29 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. (It causes trouble of the indoor controller circuit board and fan motor.) Self check...
  • Page 30 9-7. TEST POINT DIAGRAM Indoor controller board PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ CN2L Emergency operation Connector (LOSSNAY) LED3 Vane motor output (MV) Transmission 12V pulse output (Indoor/outdoor) CN90 Connect to the wireless remote Model selection controller board (CNB) LED2 Capacity setting Power supply (R.B) CN4F...
  • Page 31 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. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are memorized in the nonvolatile memory of the control P.C. board of the unit.

  • Page 32: Special Function

    SPECIAL FUNCTION 10-1. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-1-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. w Main and sub unit should be set by refrigerant address. (Outdoor Dip switch setting) Refrigerant address "00"...
  • Page 33 • System constraint · This function is available only in cooling mode. [2nd stage cut-in function]··· Request code number "322~324" Ex.) Set temp. by R/C = 20: Set point = 26: Room temp. Set point Room temp. < Set point -4 When request code number is “323”.
  • Page 34 (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 35: Disassembly Procedure

    DISASSEMBLY PROCEDURE PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ Be careful when removing heavy parts. PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ (Photo: PCA-RP125KAQ) OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Figure 1 1. Removing the air intake grille (1) Slide the air intake grille holding knobs (at 2 or 3 loca- tions) to the rear to open the air intake grille.
  • Page 36 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 3. Removing the room temperature thermistor (TH1) Photo 4 (1) Remove the air intake grille. (See Figure 1, 2) Casing (2) Remove the beam by removing screws. (See Photo 1) (3) Remove 2 screws from the electrical cover, and remove the electrical cover.
  • Page 37 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 5. Removing the fan (3 connection) Photo 9 Beam Fan guard (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the beam by removing screws. (See Photo 1) (3) Remove 2 screws from the electrical cover, and remove the electrical cover.
  • Page 38 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 13 7. Removing the vane motor (1) Remove the air intake. (See Figure 1, 2) Connector (2) Remove the right side panel. (See Figure 3, 4) Vane motor and cover (3) Remove the connector of vane motor. (4) Remove 2 screws of vane motor cover , then remove vane motor.
  • Page 39 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 10. Removing the thermistors/Liquid pipe (TH2) and con- Photo 18 denser/evaporator (TH5) (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the left and right side panels. (See Figure 3,4) (3) Remove the under panel. (See Photo 14) (4) Remove the drain pan.
  • Page 40 Heat exchanger Vane HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN New publication, effective Dec. 2010 Specifications subject to change without notice CCopyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Dec. 2010 No.OCH491 Made in Japan...

This manual is also suitable for:

Mr.slim pca-rp60kaqMr.slim pca-rp71kaqMr.slim pca-rp100kaqMr.slim pca-rp125kaqMr.slim pca-rp140kaq

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