Mitsubishi Electronics MSZ-GA22VA, MSZ-GA25VA, MSZ-GA35VA

OB378_--1qxp 05.1.17 12:55 Page 31

Contents

Main SERVICE MANUAL CONTENTS Wireless type Models MSZ-GA22V A - MSZ-GA25V A - MSZ-GA35V A - No. OB378 1TECHNICAL CHANGES MSZ-A09YV - MSZ-GA22VA - MSZ-A09YV - MSZ-GA25VA - MSZ-A12YV - MSZ-GA35VA - E1E1 PART NAMES AND FUNCTIONS 2 MSZ-GA35VA - ACCESSORIES SPECIFICATION 3 Specifications and rating conditions of main electric parts 4NOISE CRITERIA CURVES MSZ-GA25VA - 1m INDOORUNIT WALL MICROPHONE 0.8m { 6WIRING DIAGRAM REFRIGERANT SYSTEM DIAGRAM 7 INDOOR UNIT MODELS WIRING DIAGRAM MF SERVICE FUNCTIONS 8 8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION 8-1. TIMER SHORT MODE Table 1 TROUBLESHOOTING 9 MSZ-GA22VA - MSZ-GA25VA - MSZ-GA35VA - 2 1 OB378_--1qxp 05.1.17 12:55 Page 12 9-2. Failure mode recall function 1. Flow chart of the indoor/outdoor unit failure mode recall function Page 9-3. Instruction of troubleshooting 9-4. Troubleshooting check table Lighted Blinking Not lighted Flashing of OPERATION INDICATOR lamp (left-hand side lamp) indicates abnormalities. MSZ-GA22VA - MSZ-GA25VA - MSZ-GA35VA - Check of indoor fan motor OB378_--1qxp 05.1.17 12:55 Page 17 9-6. Troubleshooting flow A When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate. Check of remote controller and receiver P.C. board B OB378_--1qxp 05.1.17 12:55 Page 19 Check of indoor electronic control P.C. board and indoor fan motor C Indoor electronic control P.C.Board How to check mis-wiring and serial signal error D When POWER lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. Check of installation of the horizontal vane OB378_--1qxp 05.1.17 12:55 Page 21 E When All lamps flash ON and OFF every 0.5-second. Indoor unit and outdoor unit do not operate. Electromagnetic noise enters into TV sets or radios F Yes MSZ-GA22VA - MSZ-GA25VA - MSZ-GA35VA - } Indoor electronic control P.C. board } 9-7. Test point diagram and voltage Interlock switch(Fan) (CN1R1) DISASSEMBLY INSTRUCTIONS 10 Photo 1 <"Terminal with locking mechanism" Detaching points> MSZ-GA22VA - MSZ-GA25VA - MSZ-GA35VA - Photo 3 3. Removing the electrical box Photo 4 Photo 2 Photo 6 Photo 8 4. Removing the horizontal vane motor unit Photo 5 5. Removing the indoor fan motor and the line flow fan PARTS LIST11 MSZ-GA22VA - (WH) MSZ-GA25VA - (WH) MSZ-GA35VA - (WH) 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. ACCESSORYAND REMOTE CONTROLLER 5 6 3 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MSZ-GA22VA - (WH) MSZ-GA25VA - (WH) MSZ-GA35VA - (WH) 11-4. INDOOR UNIT HEAT EXCHANGER 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 11-4. INDOOR UNIT HEAT EXCHANGER 12 OPTIONAL PARTS AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER)