Mitsubishi Electronics MSZ-FD09NA

2. Power monitor receiver P.C. board

3. Monitor P.C. board

Contents

Main SERVICE MANUAL Wireless type Models MSZ-FD09NA MSZ-FD12NA No. OBH497 INDOOR UNIT Page Page PART NAMES AND FUNCTIONS 2 ACCESSORIES 3 Page 4OUTLINES AND DIMENSIONS Unit : inch Air out Air in Page REFRIGERANT SYSTEM DIAGRAM 6 MSZ-FD09NA MSZ-FD12NA Refrigerant flow in cooling Refrigerant flow in heating Unit:inch 7SERVICE FUNCTIONS 7-1. TIMER SHORT MODE 7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION Table 1 NOTE: 7-3. AUTO RESTART FUNCTION Operation How to release AUTO RESTART FUNCTION 8MICROPROCESSOR CONTROL WIRELESS REMOTE CONTROLLER MSZ-FD09NA MSZ-FD12NA INDOOR UNIT LAMP 8-1. COOL ( ) OPERATION 8-2. DRY ( ) OPERATION 8-3. HEAT ( ) OPERATION 8-4. AUTO CHANGE OVER AUTO MODE OPERATION 8-5. AUTO VANE OPERATION Page Page 8-6. i-see CONTROL OPERATION 8-7. AREA ( ) SETTING Indoor unit installation location and air-conditioning area Not lighted Approx. 150 degrees Page PROGRAM TIMER 8-11. Changing temperature indication (F/C) 8-9. EMERGENCY/TEST OPERATION 8-10. 3-MINUTE TIME DELAY OPERATION TROUBLESHOOTING 9-1. CAUTIONS ON TROUBLESHOOTING 9 9-2. FAILURE MODE RECALL FUNCTION 1. Flow chart of failure mode recall function for the indoor/outdoor unit 2. Indoor unit failure mode table NOTE : Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (9-4.). 9-3. INSTRUCTION OF TROUBLESHOOTING 9-4. TROUBLESHOOTING CHECK TABLE AREA R POWERL 9-5. TROUBLE CRITERION OF MAIN PARTS A Check of indoor fan motor 9-6. TROUBLESHOOTING FLOW B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. C Check of indoor electronic control P.C. board and indoor fan motor D How to check miswiring and serial signal error E Electromagnetic noise enters into TV sets or radios MSZ-FD09NA MSZ-FD12NA } Indoor electronic control P.C. board 9-7. TEST POINT DIAGRAM AND VOLTAGE { Page DISASSEMBLY INSTRUCTIONS MSZ-FD09NA MSZ-FD12NA 1. Removing the panel 10 Photo 1 Photo 3 Photo 4 Photo 2 3. Removing the electrical box 4. Removing the nozzle assembly Photo 7 5. Removing the vertical vane motor unit Photo 5 6. Removing the horizontal vane motor 7. Removing the indoor fan motor and the line flow fan Photo 10 Photo 11 Photo 8