Table Of Contents - Midea V6-i Series Service Manual

Table of Contents

Contents2
General Information2
Indoor And Outdoor Unit Capacities5
Standard Indoor Units5
Standard Indoor Unit Capacity Range5
Fresh Air Processing Unit5
Outdoor Unit Capacity Range6
External Appearance7
Standard Indoor Unit Appearance7
Heat Recovery Ventilator7
Combination Ratio9
Indoor And Outdoor Unit Combination Ratio Limitations9
Combinations Of Indoor And Outdoor Units9
Component Layout And Refrigerant Circuits10
Layout Of Functional Components11
8/10/12 Layout Of Functional Components11
14/16/18 Layout Of Functional Components12
20/22 Layout Of Functional Components13
26/28 Layout Of Functional Components15
30/32 Layout Of Functional Components16
8/10/12Hp Piping Diagram17
14/16/18Hp Piping Diagram18
20/22/24Hp Piping Diagram19
26/28Hp Piping Diagram20
30/32Hp Piping Diagram21
Key Components22
Part 3 Control22
Refrigerant Flow Diagrams23
Cooling Operation23
8/10/12Hp Refrigerant Flow During Cooling Operation23
Oil Return Operation In Cooling Mode23
Oil Return Operation In Heating Mode And Defrosting Operation24
Heating Operation24
Control34
Table Of Contents34
General Control Scheme Flowchart35
Stop Operation36
Standby Control36
Crankcase Heater Control36
Crankcase Heater Controlled According To Outdoor Ambient Temperature36
Startup Control37
Compressor Startup Delay Control37
Startup Control For Cooling Operation37
Startup Control For Heating Operation38
Component Control During Startup In Heating Mode38
Normal Operation Control39
Component Control During Normal Operation39
Component Control During Normal Cooling Operation39
Component Control During Heating Operation40
Compressor Output Control41
Compressor Step Control41
Operating Priority And Rotation Of Compressors41
Electronic Expansion Valve Control42
Outdoor Fan Control42
Outdoor Fan Speed Steps42
Protection Control44
High Pressure Protection Control44
Low Pressure Protection Control44
Discharge Temperature Protection Control44
Compressor And Inverter Module Protection Control45
Disable Heating Control45
Special Control46
Oil Return Operation46
Timing Of Oil Return Operation46
Defrosting Operation48
Outdoor Unit Component Control During Defrosting Operation48
Indoor Unit Component Control During Defrosting Operation48
Field Settings50
Outdoor Unit Field Settings51
Pcb Switches And Switch Settings51
Modes Set On Main Pcb53
Priority Mode Setting53
Heating Priority Mode53
Silent Time Setting54
Night Silent Time Setting54
Silent Mode Setting55
Maximum Fan Speed And Capacity Output Control In Different Silent Mode55
Electrical Components And Wiring Diagrams56
Outdoor Unit Electric Control Box Layout57
8-18Hp Top Layer Of Electric Control Box57
8-18Hp Bottom Layer Of Electric Control Box57
20-32Hp Top Layer Of Electric Control Box58
20-32Hp Bottom Layer Of Electric Control Box58
Outdoor Unit Main Pcb59
Outdoor Unit Main Pcb Ports59
Main Pcb Ports60
Layout61
Outdoor Unit Main Pcb Components61
Function Of Buttons Sw3 To Sw661
Menu Mode62
Menu Mode Selection Flowchart62
Menu Mode Function63
How To Exit Specified Menu Mode64
Up / Down System Check Button64
Digital Display Output65
Compressor Inverter Module66
Compressor Inverter Module Components66
Led Indicators Led1 And Led266
Dial Switch S7 Setting66
Wiring Diagrams67
Part 6 Diagnosis And Troubleshooting70
Error Code Table71
Troubleshooting72
E1: Phase Sequence Error73
Trigger / Recover Condition73
E2: Communication Error Between Indoor And Outdoor Unit75
E4: Temperature Sensor (T3/T4) Error77
E5: Abnormal Power Supply Voltage79
E7: Temperature Sensor (T7C1/2) Error81
E8: Outdoor Unit Address Error83
Xe9: Eeprom Mismatch85
Xf1: Dc Bus Voltage Error87
F3, F5: Temperature Sensor (T6B/T6A) Error89
F6: Electronic Expansion Valve Connection Error91
Xh0: Communication Error93
Xh4: Inverter Module Protection95
Led Indicators Led1 And Led2 On Inverter Module96
L0: Inverter Module Protection97
L1: Dc Bus Low Voltage Protection98
L2: Dc Bus High Voltage Protection99
L4: Mce Error100
L7: Phase Sequence Error101
Compressor Replacement Procedure103
Inspect Oil From Faulty Compressor103
Check Oil In Other Compressors In The System103
Replace Oil Separator(S) And Accumulator(S)103
Vacuum Drying And Refrigerant Charging104
Inspecting Compressor Oil104
Effects Of Spoiled Compressor Oil105
Unmatched Total Number Of Indoor Units106
H8: High Pressure Sensor Error108
P1: Discharge Pipe High Pressure Protection110
P2, H5: Suction Pipe Low Pressure Protection112
Xp3: Compressor Current Protection114
P4, H6: Discharge Temperature Protection116
P5: Outdoor Heat Exchanger Temperature Protection118
P9, H9: Fan Module Protection120
Pl, C7: Inverter Module Temperature Protection122
Pp: Compressor Discharge Insufficient Superheat Protection124
Temperature Sensor Resistance Characteristics126
Normal Operating Parameters Of Refrigerant System129
Outdoor Unit Cooling Mode Operating Parameters129