Mitsubishi Electric Mr.SLIM PKA Series Service Manual
Hide thumbs
Also See for Mr.SLIM PKA Series:
- Service manual (59 pages) ,
- Service manual (44 pages) ,
- Service manual (34 pages)
Table of Contents
Advertisement
Quick Links
SPLIT-SYSTEM HEAT PUMP
SERVICE MANUAL
Indoor unit
[Model Name]
[Service Ref.]
PKA-A12HA7
PKA-A12HA7
PKA-A18HA7
PKA-A18HA7
INDOOR UNIT
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
(Option)
IR WIRELESS REMOTE
CONTROLLER (Option)
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PARTS NAMES AND FUNCTIONS ................. 5
4. SPECIFICATIONS ........................................... 10
5. NOISE CRITERION CURVES .........................11
6. OUTLINES AND DIMENSIONS ...................... 12
7. WIRING DIAGRAM .........................................13
8. REFRIGERANT SYSTEM DIAGRAM ............ 14
9. TROUBLESHOOTING .................................... 15
10. FUNCTION SETTING ..................................... 29
11. SPECIAL FUNCTION ..................................... 30
12. DISASSEMBLY PROCEDURE ....................... 34
PARTS CATALOG (OCB637)
October 2016
No. OCH637
Notes:
• This manual describes
service data of the indoor
units only.
• RoHS compliant products
have <G> mark on the
spec name plate.
Advertisement
Table of Contents
Related Manuals for Mitsubishi Electric Mr.SLIM PKA Series
Summary of Contents for Mitsubishi Electric Mr.SLIM PKA Series
-
Page 1: Table Of Contents
SPLIT-SYSTEM HEAT PUMP October 2016 No. OCH637 SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] Notes: PKA-A12HA7 • This manual describes PKA-A12HA7 service data of the indoor units only. PKA-A18HA7 • RoHS compliant products PKA-A18HA7 have <G> mark on the spec name plate. -
Page 2: Cool
REFERENCE MANUAL OUTDOOR UNIT SERVICE MANUAL Model Name Service Ref. Service Manual No. PUZ-A12/18NKA7 PUZ-A12/18NKA7 OCH636 PUZ-A12/18NKA7-BS PUZ-A12/18NKA7-BS PUY-A12/18NKA7 PUY-A12/18NKA7 OCB636 PUY-A12/18NKA7-BS PUY-A12/18NKA7-BS PUZ-PW30NHA PUZ-PW30NHA OCH591/OCB591 Remote controller (Optional parts) Wired remote controller IR wireless remote controller COOL AUTO HEAT TEMP. -
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 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them. [2] Additional refrigerant charge When charging directly from cylinder (1) Check that cylinder for R410A on the market is syphon type.
-
Page 5: Parts Names And Functions
PARTS NAMES AND FUNCTIONS 3-1. Indoor unit Filter Air intake Vane Louver Air outlet 3-2. 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. - Page 6 Display The main display can be displayed in 2 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 7 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-Off timer Weekly timer OU silent mode Restriction Temp.
- Page 8 Main menu list Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
- Page 9 3-3. IR wireless remote controller (Option) CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. display MODEL SELECT Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed.
-
Page 10: Specifications
SPECIFICATIONS Service Ref. PKA-A12HA7 Power supply(phase, cycle, voltage) 1 phase, 60 Hz, 208/230 V Max. Fuse Size Min.Circuit Ampacity External finish White Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Line flow fan (direct) o 1 Fan(drive) o No. 0.030 Fan motor output 0.33 Fan motor... -
Page 11: Noise Criterion Curves
NOISE CRITERION CURVES PKA-A12HA7 SPL(dB) LINE NOTCH PKA-A18HA7 High 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 MAIN UNIT WALL 3.3 ft 3.3 ft MICROPHONE OCH637... -
Page 12: Outlines And Dimensions
OUTLINES AND DIMENSIONS PKA-A12HA7 PKA-A18HA7 Unit: inch (mm) 15-3/16(387) 7-1/2(192) Top side Mount board 23-9/16(599) Front side Right side 9-13/16(249) 3/16(5) Left side 27-1/16(688) 6-1/16(155) 2-1/8 (55) Knock out hole 35-3/8(898) Knock out hole for left piping for right piping Front side(Grille open) Sleeve Through hole... -
Page 13: Wiring Diagram
WIRING DIAGRAM PKA-A12HA7 PKA-A18HA7 OCH637... -
Page 14: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PKA-A12HA7 PKA-A18HA7 Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Pipe temperature Refrigerant flow in cooling termistor/liquid (TH2) Refrigerant flow in heating Condenser/evaporator temperature thermistor (TH5) Refrigerant LIQUID pipe connection (Flare) Room temperature thermistor (TH1) Strainer (#50) Distributor with strainer (#50/#50) OCH637... -
Page 15: Troubleshooting
TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller and control board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below. - Page 16 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> ■IR wireless remote controller [Procedure] 1.
- Page 17 • 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 Approx.
- Page 18 • On IR 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 19 Note: 9-3. SELF-DIAGNOSIS ACTION TABLE Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. Please refer to the outdoor unit service manual for the details. Check code Abnormal point and detection method Cause...
- Page 20 Check code Abnormal point and detection method Cause Countermeasure 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 shields.
- Page 21 Check code Abnormal point and detection method Cause Countermeasure Condenser/evaporator temperature ther- 1 Defective thermistor 1–3 Check resistance value of thermistor. For characteristics, refer to (P1) mistor (TH5) characteristics 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 22 Check code Abnormal point and detection method Cause Countermeasure Remote controller transmission 1 2 remote controllers are set as 1 Set a remote controller to main, and the error(E3)/signal receiving error(E5) “main.” other to sub. 1 Abnormal if remote controller could not (In case of 2 remote con- find blank of transmission path for 6 sec- trollers)
- Page 24 9-5. EMERGENCY OPERATION 9-5-1. When IR 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 25 9-6. HOW TO CHECK THE PARTS PKA-A12HA7 PKA-A18HA7 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature 50 to 86_F [10 to 30°C]) Pipe temperature Normal Abnormal thermistor/liquid (TH2) (Refer to “9-6-1.
- Page 27 9-7. TEST POINT DIAGRAM Indoor controller board PKA-A12HA7 PKA-A18HA7 CNMF Connect to the fan motor (MF) 1–3: 294–325 V DC 4–3: 15 V DC 5–3: 0–6.5 V DC CN105 6–3: 0 or 15 V DC CN01 Connect to the Terminal block (TB4) 1–3: 208/230 V AC Emergency FUSE...
- Page 28 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. PKA-A12HA7 PKA-A18HA7 ■ The black square ( ) indicates a switch position. Jumper wire Setting by the DIP switch and jumper wire Remarks Functions MODEL...
-
Page 29: Function Setting
FUNCTION SETTING 10-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. (1) Functions available when setting the unit number to 00 Refer to the service manual that comes with each outdoor unit. -
Page 30: Special Function
SPECIAL FUNCTION 11-1. Rotation Function (and back-up function, 2nd stage cut-in function) This function is only available when using wired remote controller. 11-1-1. Operation (1) Rotation function (and Back-up function) Outline of functions · Main and sub units operate alternately according to the interval of rotation setting. Note: Main and sub unit should be set by refrigerant address. - Page 31 System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 68°F [20:] [2nd stage cut-in function]··· Request code number "322–324" Set point = 79°F [26:] When request code number is “323”. Room temp. ] Set point Room temp.
- Page 32 (2) Rotation and back up operation PAR-3xMAA ("x" represents 0 or later) 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...
- Page 33 11-2. BACK-UP HEATING FUNCTION 11-2-1. Operation The back-up heater turns ON when both of the following conditions have been satisfied: A) When the room temperature has not risen after the heater ON delay time has passed. Note: The heater ON delay time starts when the condition of “set temperature − room temperature > 1°F [0.5:]” has been satisfied. B) Set temperature −...
-
Page 34: Disassembly Procedure
DISASSEMBLY PROCEDURE PKA-A12HA7 PKA-A18HA7 Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the lower side of the indoor unit from the Figure 1 installation plate (1) Remove the front panel. (2) Insert the screw driver to the corner hole at both left and right side as shown in the figure 1. - Page 35 OPERATION PROCEDURE PHOTOS 3. Removing the indoor controller board and IR wire- Photo 3 less controller board Screw (side cover) Electrical box Screw (top cover) cover (top) (1) Remove the front panel. (Refer to step 2) Electrical box (2) Remove the room temp. thermistor TH1. (see Photo 3) cover (side) (3) Remove the electrical box covers (screw 4 ×...
- Page 36 OPERATION PROCEDURE PHOTOS Electrical box cover (side) 5. Removing the nozzle assembly (with vane and vane Photo 7 Electrical box cover (top) motor) and drain hose Screw (side cover) Screw (top cover) (1) Remove the front panel (Refer to step 2). (2) Remove the electrical box cover.
- Page 37 OPERATION PROCEDURE PHOTOS 8. Removing the pipe temperature thermistor/liquid Photo 12 Condenser/evaporator tem- perature thermistor (TH5) and the condenser/evavorator temperature thermis- Heat exchanger (1) Remove the front panel. (Refer to step 2) (2) Remove the electrical box cover. (3) Remove the motor band. (4) Cut the wiring fixed band.
- Page 38 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2016 MITSUBISHI ELECTRIC CORPORATION Published: Oct. 2016 No. OCH637 Made in Japan Specifications are subject to change without notice.