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Mitsubishi Mr.Slim PLA-RP100BA3 Service Manual

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

SERVICE MANUAL

Indoor unit
[Model names]
[Service Ref.]
PLA-RP100BA3
PLA-RP100BA3
Model name
indication
INDOOR UNIT
ON/OFF
TEMP
WIRELESS REMOTE
CONTROLLER
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
REVISED EDITION-A
CONTENTS
1. TECHNICAL CHANGES.................................. 2
2. REFERENCE MANUAL ................................... 2
3. SAFETY PRECAUTION ................................... 3
4. PART NAMES AND FUNCTIONS ................... 4
5. SPECIFICATIONS ............................................ 7
6. NOISE CRITERION CURVES .......................... 8
7. OUTLINES AND DIMENSIONS ....................... 9
8. WIRING DIAGRAM ......................................... 10
10. TROUBLESHOOTING .................................... 12
11. SPECIAL FUNCTION ..................................... 27
12. DISASSEMBLY PROCEDURE ....................... 36
PARTS CATALOGUE (OCB459)
October 2009
No. OCH459
Revision:
• "11. SPECIAL
FUNCTION" has been
modified in REVISED
EDITION-A.
• Some descriptions have
been modified.
•
Please void OCH459.
NOTE:
• This manual describes
only service data of the
indoor units.
• RoHS compliant prod-
ucts have <G> mark on
the spec name plate.

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Summary of Contents for Mitsubishi Mr.Slim PLA-RP100BA3

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS October 2009 No. OCH459 REVISED EDITION-A SERVICE MANUAL Revision: • "11. SPECIAL Indoor unit FUNCTION" has been [Model names] [Service Ref.] modified in REVISED EDITION-A. PLA-RP100BA3 PLA-RP100BA3 • Some descriptions have been modified. •...

  • Page 2: Technical Changes

    TECHNICAL CHANGES PLP-6BAJ (Automatic filter elevation panel, option) The controller board (U.B) has been changed (only for the panel but not for the service part). REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Service Ref. Service Manual No. PU(H)-P100VHA#2.UK PU(H)-P100VHAR3.UK OC379 PU(H)-P100YHA#2.UK PU(H)-P100YHAR3.UK PUHZ-P100VHA3.UK OCH415/OCB415...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 3-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 3-2. 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: Wired Remote Controller

    Wired remote controller “Sensor” indication Display Section Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, Shows the current day of the week. all parts of the display are shown as lit. During actual operation, only Time/Timer Display the relevant items will be lit.

  • Page 6: Wireless Remote Controller

    Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display SET TEMP.

  • Page 7: Specifications

    SPECIFICATIONS Service Ref. PLA-RP100BA3 Cooling Heating Mode Power supply (phase, cycle, voltage) Single phase, 50Hz, 230V 0.15 0.14 Input 1.00 Running current 0.94 External finish (Panel) Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan (drive) Turbo fan (direct) Fan motor output 0.120 Airflow (Low-Medium2-Medium1-High) 20-23-26-30(710-810-920-1,060)

  • Page 8: Noise Criterion Curves

    NOISE CRITERION CURVES NOTCH SPL(dB) LINE PLA-RP100BA3 High Medium1 Medium2 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 UNIT CEILING 1.5m MICROPHONE...

  • Page 9: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLA-RP100BA3 Unit: mm Ceiling hole 20~45 20~45 860~910 Detail connecting of branch duct(Both aspects) Fresh air Suspension bolt pitch intake hole Cut out hole Remote controller terminal block Indoor unit/Outdoor unit Branch duct hole connecting terminal block Branch duct hole 14- 2.8 Indoor power supply...

  • Page 10: Wiring Diagram

    WIRING DIAGRAM PLA-RP100BA3 [LEGEND] <Table 1> SW1 (MODEL SELECTION) SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD FAN MOTOR CN2L CONNECTOR (LOSSNAY) VANE MOTOR MODELS SETTING CN32 CONNECTOR (REMOTE SWITCH) TERMINAL BLOCK (Indoor unit Power (option)) 1 2 3 4 5 CN41 CONNECTOR (HA TERMINAL-A) TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)

  • Page 11: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLA-RP100BA3 Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./ Eva.temperature) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Thermistor TH2 Pipe temperature(Liquid) Thermistor TH1 (Room temperature) Strainer (#50) Distributor with strainer (#50)

  • Page 12: Troubleshooting

    TROUBLESHOOTING 10-1. 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 10-2. 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> [Procedure] 1.
  • Page 14 • 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 15 • 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 16 Note: Refer to the manual of outdoor unit for the details of display 10-3. 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 17 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is work- (Cooling or drying mode) (Cooling or drying mode) 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove the blockage.
  • Page 18 Abnormal point and detection method Countermeasure Error Code Cause 1 Defective thermistor Pipe temperature thermistor/ 1–3 Check resistance value of thermistor. Condenser-Evaporator (TH5) characteristics For characteristics, refer to (P1) above. 1 The unit is in 3-minute resume protec- 2 Contact failure of connector 2 Check contact failure of connector (CN44) tion mode if short/open of thermistor is (CN44) on the indoor controller...
  • Page 19 Abnormal point and detection method Countermeasure Error Code Cause Indoor/outdoor unit communication 1 Contact failure, short circuit or, * Check LED display on the outdoor control error (Signal receiving error) circuit board. (Connect A-control service miswiring (converse wiring) of 1 Abnormal if indoor controller board tool, PAC-SK52ST) indoor/outdoor unit connecting cannot receive any signal normally for 6...
  • Page 20 10-4. 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. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
  • Page 21 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 22: Emergency Operation

    10-5. EMERGENCY OPERATION 10-5-1. 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 23 10-6. HOW TO CHECK THE PARTS PLA-RP100BA3 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature of 10 Pipe temperature Normal Abnormal thermistor/liquid(TH2) (Refer to the thermistor.) 4.3k ~9.6k Open or short Condenser/Evaporator...
  • Page 24 10-6-1. Thermistor < Thermistor for lower temperature > <Thermistor Characteristic graph> Room temperature thermistor (TH1) Thermistor for Pipe temperature thermistor/liquid (TH2) lower temperature Condenser/evaporator temperature thermistor (TH5) Thermistor R =15k' ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k'...
  • Page 25 10-7. TEST POINT DIAGRAM Indoor controller board PLA-RP100BA3 CN3G LED3 Connect to the auto grille controller board (CN3G) Transmission (Indoor/outdoor) CN90 13V pulse output Connect to the wireless remote controller board Vane motor output (MV) (CNB) 12V pulse output CN4Y i-see sensor Model selection CN6Y...
  • Page 26 10-8. 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 27: Special Function

    SPECIAL FUNCTION 11-1. HOW TO PERFORM THE UP/DOWN OPERATION OF THE AIR INTAKE GRILLE 11-1-1. Setting up the lowering distance of air intake grille Unit You can set up 8 different stages of lowering distance for Decorative the air intake grille according to the set up location if desired. panel * As a factory default, the decorative panel will automatically stop at 1.6 m from the ceiling level.
  • Page 28 11-1-3. How to perform the up/down operation using wired remote controller (PAR-21MAA) General Operation * Raise or lower all the air intake grilles managed by the remote controller at the same time. Install the remote controller in a place where you can observe all the air-conditioners. Otherwise, the lowering grille may make contact with something and cause damage to it.
  • Page 29 ■ Up/down operation with the individual specified air-conditioner (when used in combination with Mr. SLIM model) * Raise or lower the air intake grille of the specific air-conditioner that you select from all that are managed by that remote controller. 1) Ensure that the air-conditioner is not running.
  • Page 30 11-2. OPERATION (AUTOMATIC FILTER ELEVATION PANEL: PLP-6BAJ) (1) Normal operation UP/DOWN Wire 1b Air intake grille is raised/lowered by UP/DOWN UP/DOWN commands of UP and DOWN. Machine 2 Machine 1 Air intake grille does not move under the state of no-load detection or obstacle detection. Air intake grille stops automatically at the set lowering distance from the ceiling level.
  • Page 31 11-3. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 11-3-1. Dip SW 22 type SW22 Panel Indoor unit (WHT) LS21 CN3G CN90 (WHT) (BLK) CN2G (BLK) CN3G (BLK) FUSE CN22 (BLU) CN2F (BLK) CNAC (WHT) CN2E LS21 (RED) CN2B CN2C (WHT) GRN/YLW (WHT)
  • Page 32 11-3-3. Check point of trouble <LED (SW22 type) /LED2 (SW2 type) display> Turn OFF : No power supply Blink : Storage detection switch ON (short) One blink : Storage detection switch OFF (open) Two blinks : Tension detection switch OFF (open) <controller board>...
  • Page 33 11-5. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 11-5-1. 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 34 • System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 20: [2nd stage cut-in function]··· Request code number "322~324" Set point = 26: When request code number is “323”. Room temp. Set point Room temp.
  • Page 35 (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.

  • Page 36: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLA-RP100BA3 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the knob of air intake grille toward the arrow 1 to Filter open the air intake grille. (2) Remove drop prevention hook from the panel.
  • Page 37 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Coil plate Photo 3 6. Removing the fan and fan motor (MF) (1) Remove the electrical box. (See Photo 2) (2) Remove the bell mouth (3 screws). (See Photo 2) (3) Remove the turbo fan nut. (4) Pull out the turbo fan.
  • Page 38 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 7 10. Removing the drain pump (DP) and float switch (FS) (1) Remove the drain pan. (See Photo 6) Float switch (2) Cut the hose band and remove the hose. (3) Remove the drain pump assembly (3 screws and 2 hooks). Hose band (4) Remove the drain pump (3 screws).
  • Page 40 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. New publication, effective Oct. 2009 Distributed in Oct. 2009 No.OCH459 REVISED EDITION-A PDF 7 Specifications subject to change without notice Distributed in Apr. 2009 No.OCH459 PDF 7...

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