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Mitsubishi Electric Mr.SLIM PLA Series Service Manual
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Mitsubishi Electric Mr.SLIM PLA Series Service Manual

Split-type, heat pump air conditioners; split-type, air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model names]
PLA-ZRP100BA
Model name
indication
INDOOR UNIT
ON/OFF
TEMP
WIRELESS REMOTE
CONTROLLER
[Service Ref.]
PLA-ZRP100BA
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
CONTENTS
1. REFERENCE MANUAL .................................. 2
2. SAFETY PRECAUTION .................................. 3
3. PART NAMES AND FUNCTIONS ................... 4
4. SPECIFICATIONS ......................................... 12
5. NOISE CRITERION CURVES ....................... 13
6. OUTLINES AND DIMENSIONS ..................... 14
7. WIRING DIAGRAM ........................................ 15
9. TROUBLESHOOTING ................................... 17
10. SPECIAL FUNCTION .................................... 33
11. DISASSEMBLY PROCEDURE ...................... 43
PARTS CATALOGUE (OCB529)
October 2012
No. OCH529
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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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS October 2012 No. OCH529 SERVICE MANUAL Indoor unit NOTE: [Model names] [Service Ref.] • This manual describes PLA-ZRP100BA only service data of the PLA-ZRP100BA indoor units. • RoHS compliant prod- ucts have <G> mark on the spec name plate.

  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Service Ref. Service Manual No. PUHZ-ZRP100VKA OCH527/OCB527 PUHZ-ZRP100YKA OCH529...

  • 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 a vacuum pump with a reverse flow check Use new refrigerant pipes. valve.

  • 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 3-2. 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 6 3-3. WIRED REMOTE CONTROLLER <PAR-30MAA/PAR-31MAA> Wired remote controller function * The functions which can be used are restricted according to the model. : Supported : Unsupported PAR-30MAA/PAR-31MAA Function PAR-21MAA Slim City multi Body Product size H × W × D (mm) 120 ×...
  • Page 7 The main display can be displayed in two different modes: "Full" and "Basic". The factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. <Full mode> <Basic mode> * All icons are displayed for explanation. Cool Set temp.
  • Page 8 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the SELECT button. Vane · Louver · Vent. (Lossnay) High power Timer On / Off timer Auto-Off timer Filter information Error information Weekly timer Energy saving...
  • Page 9 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from fi ve different settings. Use to turn ON / OFF the louver. •...
  • Page 10 Setting and display items Setting details Initial setting Display Make the settings for the remote controller related items as necessary. details Clock: The factory settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display.
  • Page 11 3-4. WIRED REMOTE CONTROLLER <PAR-21MAA> “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. During actual operation, only Time/Timer Display the relevant items will be lit.

  • Page 12: Specifications

    SPECIFICATIONS Service Ref. PLA-ZRP100BA Cooling Heating Mode Power supply (phase, cycle, voltage) Single phase, 50Hz, 230V 0.08 0.07 Input 0.74 0.66 Running current 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 13: Noise Criterion Curves

    NOISE CRITERION CURVES PLA-ZRP100BA NOTCH SPL(dB) LINE 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 OCH529...

  • Page 14: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLA-ZRP100BA 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 15: Wiring Diagram

    WIRING DIAGRAM PLA-ZRP100BA [LEGEND] SYMBOL NAME SYMBOL NAME <Table 1> SW1 (MODEL SELECTION) INDOOR CONTROLLER BOARD TERMINAL BLOCK (Indoor unit Power (option)) MODELS Service CN2L CONNECTOR (LOSSNAY) TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) 1 2 3 4 5 CN32 CONNECTOR (REMOTE SWITCH) TB5,TB6 TERMINAL BLOCK (REMOTE CONTROLLER PLA-ZRP·BA...

  • Page 16: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLA-ZRP100BA 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) OCH529...

  • Page 17: 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> [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 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) 1 The unit is in 3-minute resume preven- 1 Defective thermistor character- 1–3 Check resistance value of thermistor.
  • Page 22 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is oper- ating (Cooling or drying mode) (Cooling or drying mode) 1 Freezing protection (Cooling mode) 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. The unit is in 6-minute resume preven- 2 Short cycle of air path 2 Remove the blockage.
  • Page 23 Abnormal point and detection method Countermeasure Error Code Cause Pipe temperature thermistor/ Condenser-Evaporator (TH5) 1–3 Check resistance value of thermistor. 1 The unit is in 3-minute resume protec- 1 Defective thermistor character- For characteristics, refer to (P1) above. tion mode if short/open of thermistor is istics 2 Check contact failure of connector (CN44) 2 Contact failure of connector...
  • Page 24 Abnormal point and detection method Countermeasure Error Code Cause Indoor/outdoor unit communication * Check LED display on the outdoor control circuit board. (Connect A-control service error (Signal receiving error) tool, PAC-SK52ST) 1 Abnormal if indoor controller board 1 Contact failure, short circuit or, Refer to outdoor unit service manual.
  • Page 25 Abnormal point and detection method Countermeasure Error Code Cause Abnormal refrigerant circuit 1 When this error occurs, be sure to replace 1 Abnormal operation of 4-way During Cooling, Dry, or Auto Cooling the 4-way valve. valve operation, when the following are 2 Check refrigerant pipes for disconnection or 2 Disconnection of or leakage in regarded as failures when detected for...
  • Page 26 9-4. TROUBLESHOOTING OF PROBLEMS 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 sup- door unit.
  • Page 27 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 28 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 29 9-6. HOW TO CHECK THE PARTS PLA-ZRP100BA Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature of 10 ~30 ) Pipe temperature Normal Abnormal thermistor/liquid(TH2) (Refer to the thermistor.) 4.3k ~9.6k Open or short Condenser/Evaporator...
  • Page 30 9-6-1. 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 31 9-7. TEST POINT DIAGRAM Indoor controller board PLA-ZRP100BA CN3G LED3 Connect to the auto grille controller board (CN3G) Transmission (Indoor/outdoor) 13V pulse output CN90 Connect to the wireless Vane motor output (MV) remote controller board (CNB) 12V pulse output CN4Y i-see sensor Model selection CN6Y...
  • Page 32 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 33: Special Function

    SPECIAL FUNCTION 10-1. HOW TO PERFORM THE UP/DOWN OPERATION OF THE AIR INTAKE GRILLE 10-1-1. 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 34 10-1-2. How to perform the up/down operation using wireless remote controller Ensure that the air-conditioner is not running. Warning: • Otherwise, it may cause an injury or a failure. 1) Ensure that the air-conditioner is not running. 2) Press the "Down" button to lower the air intake grille. * By default, the air intake grille will automatically stop at a lowering distance of 1.6 m from the ceiling level.
  • Page 35 10-1-4. 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 36 ■ 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 37 10-2. OPERATION (AUTO DESCENDING 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 38 10-3. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 10-3-1. 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 39 10-3-3. 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 40 10-5. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-5-1. 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 41 • 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 42 PAR-30MAA/PAR-31MAA Press the button. Main Main menu Maintenance Initial setting Select "Service" with the [Cursor] buttons ( ) or the [Page] buttons ( Service ), and press the button. Main display: Cursor Page Enter the current maintenance password (4 numerical digits). Service menu •...

  • Page 43: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLA-ZRP100BA 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 44 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 45 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 46 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Oct. 2012 No.OCH529 New publication, effective Oct. 2012 Made in Japan Specifications are subject to change without notice...

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