Mitsubishi Electronics MXZ-24UV, MXZ-24UV - E2

OB287--2.qxp 03.1.16 10:31 AM Page 43

Contents

Main SERVICE MANUAL CONTENTS Inverter-controlled multi system Model MXZ-24UV - MXZ-24UV - No. OB287 Page PART NAMES AND FUNCTIONS 3INDOOR / OUTDOOR CORRESPONDENCE TABLE Combination of the connectable indoor units There is no combination other than this table. INDOOR UNITS COMBINATION MXZ-24UV - E1 , MXZ-24UV - E2 4 Page 5SPECIFICATION NOISE CRITERIA CURVES6 MXZ-24UV - OUTLINES AND DIMENSIONS OB287--1.qxp 03.1.16 10:29 AM Page 9 7 2.Service space Unit: mm WIRING DIAGRAM OB287--1.qxp 03.1.16 10:29 AM Page 10 8 SG79Y088H01 MODELS MXZ-24UV- REFRIGERANT SYSTEM DIAGRAM 9 (1) GUARANTEED VOLTAGE (2) AIR FLOW (3) MAIN READINGS } } PERFORMANCE CURVES 10-1.CAPACITY AND THE INPUT CURVES 10-2.Capacity and input correction by inverter output frequency (OUTDOOR UNIT:MXZ-24UV) 4. 18-class unit in single operation 1. 07-class unit in single operation 2. 09-class unit in single operation 10-3.Outdoor low pressure and outdoor unit current Page Page Page MICROPROCESSOR CONTROL 11 INVERTER MULTI SYSTEM CONTROL 11-1.LEV control - 11-2.Operational frequency range 11-3.Heat defrosting control 11-4.High pressure protection 11-5.Discharge temperature protection control 11-6.Refrigerant recovery control on heating 11-7.Outdoor fan control 11-8.Relation between main sensor and actuator 12 TROUBLESHOOTING 12-1. Cautions on troubleshooting 12-2. Instruction of troubleshooting Note . LED indicates "00" in the normal status. 7-segment LED display Error mode Normal aa44 (A4) aa33 (A3) pp11 dd88 (d8) dd99 (d9) dd77 12-4. Trouble criterion of main parts BBCheck of serial signal AACheck of power supply CCCheck of R. V. coil DDCheck of LEV EECheck of inverter/ compressor FFCheck of thermistor GGCheck of fan motor HHCheck of HPS IIThe other cases TEST POINT DIAGRAM AND VOLTAGE MXZ-24UV -, MXZ-24UV - Electronic control P.C.board OB287--2.qxp 03.1.16 10:30 AM Page 33 Page { OPERATING PROCEDURE PHOTOS MXZ-24UV - , MXZ-24UV - OUTDOOR UNIT 13 DISASSEMBLY INSTRUCTIONS OPERATING PROCEDURE PHOTOS Page Part numbers that are circled are not shown in the illustration. 14-1. OUTDOOR UNIT FUNCTIONAL PARTS PARTS LIST 6 OB287--2.qxp 03.1.16 10:31 AM Page 40 Part numbers that are circled are not shown in the illustration. 10 3 14-2. OUTDOOR UNIT STRUCTURAL PARTS 14-3. ACCESSORY PARTS MXZ-24UV - MXZ-24UV - 15-1. Different-diameter pipe 15-2. Outlet guide 15 OPTIONAL PARTS