Mitsubishi Electric Mr. Slim PLA Series Service Manual
Ceiling cassettes
Hide thumbs
Also See for Mr. Slim PLA Series:
- Service manual (46 pages) ,
- Service manual (49 pages) ,
- Service manual (48 pages)
Table of Contents
Advertisement
SERVICE MANUAL
Indoor unit
[Model Name]
PLA-A12BA6
PLA-A18BA6
PLA-A24BA6
PLA-A30BA6
PLA-A36BA6
PLA-A42BA6
INDOOR UNIT
ON/OFF
TEMP
IR WIRELESS REMOTE
CONTROLLER
(Option)
[Service Ref.]
PLA-A12BA6
PLA-A18BA6
PLA-A24BA6
PLA-A30BA6
PLA-A36BA6
PLA-A42BA6
WIRED REMOTE
CONTROLLER
(Option)
December 2014
No. OCH581
Notes:
CONTENTS
1. REFERENCE MANUAL ........................ 2
2. SAFETY PRECAUTION ........................ 3
3. PARTS NAMES AND FUNCTIONS ...... 5
4. SPECIFICATIONS ............................... 11
5. NOISE CRITERION CURVES ............. 13
6. OUTLINES AND DIMENSIONS ............ 15
7. WIRING DIAGRAM ............................. 16
8. REFRIGERANT SYSTEM DIAGRAM ...... 17
9. TROUBLESHOOTING ........................ 18
10. SPECIAL FUNCTION ......................... 32
11. DISASSEMBLY PROCEDURE ........... 35
PARTS CATALOG (OCB581)
Advertisement
Table of Contents
Related Manuals for Mitsubishi Electric Mr. Slim PLA Series
Summary of Contents for Mitsubishi Electric Mr. Slim PLA Series
- Page 1 December 2014 No. OCH581 SERVICE MANUAL Indoor unit Notes: [Model Name] [Service Ref.] PLA-A12BA6 PLA-A12BA6 PLA-A18BA6 PLA-A18BA6 PLA-A24BA6 PLA-A24BA6 PLA-A30BA6 PLA-A30BA6 PLA-A36BA6 PLA-A36BA6 PLA-A42BA6 PLA-A42BA6 CONTENTS 1. REFERENCE MANUAL ......2 2. SAFETY PRECAUTION ......3 3. PARTS NAMES AND FUNCTIONS ..5 4.
-
Page 2: Reference Manual
REFERENCE MANUAL OUTDOOR UNIT SERVICE MANUAL Remote controller (Optional parts) COOL AUTO HEAT OCH581... -
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 the following tools specifically designed for Use new refrigerant pipes. use with R410A refrigerant. -
Page 4: Cautions For Service
[1] Cautions for service (1) Perform service after recovering the refrigerant left in the unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant. -
Page 5: Parts Names And Functions
PARTS NAMES AND FUNCTIONS Drain pipe Filter Air outlet Liquid pipe Gas pipe i-see sensor (option) Vane Air intake (Intake grille) OCH581... -
Page 6: Wired Remote Controller (Option)
Wired remote controller (Option) Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear. - Page 7 Display The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic” mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
- 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 Weekly timer Restriction Temp.
-
Page 9: Setting Details
Main menu list Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. Use to turn ON / OFF the louver. Use to set the amount of ventilation. High power** Use to reach the comfortable room temperature quickly. Timer On/Off timer* Use to set the operation On/Off times. - Page 10 IR wireless remote controller (Option) 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.
-
Page 11: Specifications
SPECIFICATIONS Service Ref. PLA-A12BA6 Power supply (phase, cycle, voltage) Single phase,60 Hz, 208/230 V Max. Fuse Size Min. Circuit Ampacity External finish (Panel) Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.05 F.L.A. - Page 12 Service Ref. PLA-A30BA6 Power supply (phase, cycle, voltage) Single phase, 60 Hz, 208/230 V Max. Fuse Size Min. Circuit Ampacity External finish (Panel) Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.05 F.L.A.
-
Page 13: Noise Criterion Curves
NOISE CRITERION CURVES PLA-A12BA6 PLA-A18BA6 NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 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 CONTINUOUS NOISE NOISE... - Page 14 PLA-A36BA6 PLA-A42BA6 NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 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 CONTINUOUS NOISE NOISE 1000 2000 4000...
-
Page 15: Outlines And Dimensions
OUTLINES AND DIMENSIONS INDOOR UNIT PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 Unit: in (mm) Ceiling hole 25/32 to 1-25/32(20~45) 33-27/32 to 35-13/16(860~910) 25/32 to 1-25/32(20~45) 31-7/8(810) Fresh air Suspension bolt pitch Detail connecting of Branch duct(Both aspects) 6-5/16 intake hole (160) (100) (100) -
Page 16: Wiring Diagram
WIRING DIAGRAM INDOOR UNIT PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 [LEGEND] SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD FAN MOTOR CN2L CONNECTOR (LOSSNAY) VANE MOTOR CN24 CONNECTOR<BACK-UP HEATING> TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) TERMINAL BLOCK (REMOTE CONTROLLER CN30 CONNECTOR<LLC> TB5,TB6 CN32 CONNECTOR (REMOTE SWITCH) TRANSMISSION LINE) -
Page 17: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 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) -
Page 18: Troubleshooting
TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Unit conditions at service Check code Actions to be taken for service (summary) Judge what is wrong and take a corrective action Displayed according to “9-3. SELF-DIAGNOSIS ACTION TABLE”. The trouble is reoccurring. - Page 19 9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER <In case of trouble during operation> < Malfunction-diagnosis method at maintenance service> [Procedure] Refrigerant address display CHECK CHECK display Temperature button TEMP ON/OFF ON/OFF button AUTO STOP MODE AUTO START VANE HOUR button CHECK LOUVER CHECK TEST RUN button...
-
Page 20: Check Code
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 0.5 s Approx. - Page 21 On IR wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp On wired remote controller 1 Check code displayed in the LCD. (Refer to the previous page, 1 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 22 9-3. SELF-DIAGNOSIS ACTION TABLE Abnormal point and detection method Countermeasure Check code Cause 1–3 Room temperature thermistor (TH1) " " " " " Pipe temperature thermistor/Liquid (TH2) 1–3 Note: Contact failure of drain float switch (CN4F) Drain over flow protection operation 3–4 1–4.
- Page 23 Abnormal point and detection method Countermeasure Check code Cause Freezing/overheating protection is work- 6–8 1–4 Pipe temperature OCH581...
- Page 24 Abnormal point and detection method Countermeasure Check code Cause 1–3 Pipe temperature thermistor/ Condenser-Evaporator (TH5) Note: Forced compressor stop (due to water leakage abnormality) Note: Remote controller transmission error(E0)/signal receiving error(E4) 1–3, OCH581...
- Page 25 Abnormal point and detection method Countermeasure Check code Cause Remote controller transmission error(E3)/signal receiving error(E5) 4–6 Indoor/outdoor unit communication error (Signal receiving error) 2–4 1–3 Indoor/outdoor unit communication error (Transmitting error) Indoor controller board Remote controller control board When this error occurs, be sure to Abnormal refrigerant circuit replace the 4-way valve.
- Page 26 9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Phenomena Cause Countermeasure (1)Upward/downward vane performance failure (2)Receiver for IR wireless remote controller 2–4 OCH581...
-
Page 27: Emergency Operation
9-5. EMERGENCY OPERATION 9-5-1. When IR wireless remote controller troubles 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 PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. (At the ambient temperature of 50 to 86 Pipe temperature Normal Abnormal "...
- Page 29 9-6-1. Thermistor <Thermistor for lower temperature> " " " " " 20 10 0 10 20 30 40 50 " 14 32 50 68 86 104122 °F " Temperature 9-6-2. DC Fan motor (FAN MOTOR/ INDOOR CONTROLLER BOARD) Check method of DC fan motor (fan motor/ indoor controller circuit board) Notes ·...
-
Page 30: Test Point Diagram
9-7. TEST POINT DIAGRAM Indoor controller board PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 1–2 3–4 3–5 1–2 3–4 CN22 1–4 5–4 6–4 7–4 OCH581... - Page 31 9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the DIP switch and the jumper wire on indoor controller board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are preset in the nonvolatile memory of the indoor controller board. PLA-A12BA6 PLA-A18BA6 PLA-A24BA6...
-
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 System constraint Fig 1 Refrigerant address Refrigerant address Operation pattern "00" "01" 1[Back-up function only]··· Request code number "312" Error occurred on main unit Start operation OC-1... - Page 33 10-1-2. How to perform the operation of rotation function (Back-up function, 2nd stage cut-in function) (1) Request Code List OCH581...
-
Page 34: How To Connect
(2) Rotation and back up operation PAR-31MAA Main Main menu Maintenance Initial setting Service Main display: Cursor Page Service menu Enter maintenance password 9999 Select: Cursor Service menu Test run Input maintenance info. Function setting Check Self check Main menu: Cursor Check menu Error history... -
Page 35: Disassembly Procedure
DISASSEMBLY PROCEDURE PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 Photo 1 2. Removing the room temperature thermistor (TH1) 3. Removing the indoor controller board (I.B) Photo 2 4. Removing the electrical box OCH581... - Page 36 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 5. Removing the fan and fan motor (MF) Photo 3 Figure 2 6. Removing the panel Screw Panel Screw Detail Corner panel Corner panel (See Figure 2) Panel (See Photo 4, 5) Corner panel Photo 4 Photo 5 Photo 6 7.
- Page 37 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 8 9. Removing the drain pump (DP) and float switch (FS) Photo 9 10. Removing the heat exchanger Photo 10 OCH581...
-
Page 39: Parts Catalog
SPLIT-SYSTEM HEAT PUMP December 2014 No. OCB581 PARTS CATALOG Indoor unit Note: [Model Name] [Service Ref.] PLA-A12BA6 PLA-A12BA6 PLA-A18BA6 PLA-A18BA6 PLA-A24BA6 PLA-A24BA6 PLA-A30BA6 PLA-A30BA6 PLA-A36BA6 PLA-A36BA6 PLA-A42BA6 PLA-A42BA6 CONTENTS 1. RoHS PARTS LIST ....... 2 SERVICE MANUAL (OCH581) Panel model: PLP-40BAU Model name indication INDOOR UNIT... -
Page 40: Rohs Parts List
RoHS PARTS LIST PANEL PARTS for PLA-A12/18/24/30/36/42BA6 PLP-40BAU (Wired) 7LB001-P01_07 OCB581... - Page 41 RoHS PARTS LIST Q'ty/unit Wiring Recom- Remarks Parts No. Parts Name Speci cation Diagram mended (Drawing No.) PLP-40BAU Symbol Q'ty G T7W E21 003 PANEL ASSY G T7W E13 002 VANE & BUSH ASSY/ US G T7W E03 638 CORNER PANEL (BAND) G R01 E21 638 CORNER PANEL G R01 E16 500 L.
- Page 42 RoHS PARTS LIST STRUCTURAL AND FUNCTIONAL PARTS PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 OCB581...
- Page 43 RoHS PARTS LIST Q'ty/unit Wiring Recom- Remarks Parts No. Parts Name Speci cation PLA-A·BA6 Diagram mended (Drawing No.) Symbol Q'ty 12, 18 24, 30 36, 42 G R01 E13 097 WASHERS SET G T7W E33 529 DRAIN PAN G R01 E59 220 FAN MOTOR G R01 E66 220 FAN MOTOR G R01 E14 105 MOTOR MOUNT G R01 E39 114 TURBO FAN-S...
- Page 44 RoHS PARTS LIST ELECTRICAL PARTS PLA-A12BA6 PLA-A18BA6 PLA-A24BA6 PLA-A30BA6 PLA-A36BA6 PLA-A42BA6 7LB001-E07_01 Q'ty/unit Wiring Recom- Remarks Parts No. Parts Name Speci cation PLA-A·BA6 Diagram mended (Drawing No.) Symbol Q'ty 12/18/24/30/36/42 1 G R01 E18 246 TERMINAL BLOCK 3P (S1,S2,S3) 2 G R01 H18 202 ROOM TEMP. THERMISTOR 3 G R01 E01 520 SENSOR COVER 4 G R01 E48 246 TERMINAL BLOCK 2P (1,2)