Table Of Contents - Mitsubishi Heavy Industries FDT100VNAWVH Service Manual

Table of Contents

Table Of Contents3
Outline Of Operation Control By Microcomputer6
Remote Control6
Wireless Remote Control8
Unit Display Section10
Operation Control Function By The Wired Remote Control11
Switching Sequence Of The Operation Mode Switches Of Remote Control11
Cpu Reset11
Power Failure Compensation Function (Electric Power Source Failure)11
Alert Displays12
Operation Control Function By The Indoor Control14
Operations Of Functional Items During Cooling/Heating15
Dehumidifying (Dry) Operation15
Timer Operation16
Rc-E516
Hot Start (Cold Draft Prevention At Heating)17
Ending Condition17
Hot Keep18
Auto Swing Control (Fdt, Fdtc, Fde Only)18
Thermostat Operation19
Filter Sign20
Compressor Inching Prevention Control20
Drain Pump Control21
Drain Pump Motor (Dm) Control21
Operation Check/Drain Pump Test Run Operation Mode21
Cooling, Dehumidifying Frost Protection22
Heating Overload Protection22
Anomalous Fan Motor22
Plural Unit Control – Of 16 Units Group By One Remote Control23
High Ceiling Control23
Abnormal Temperature Sensor Broken Wire/Short-Circuit Detection24
External Input/Output Control (Cnt Or Cnta)24
Operation Permission/Prohibition26
Temporary Stop Input28
Selection Of Cooling/Heating External Input Function28
Fan Control At Heating Startup29
Room Temperature Detection Temperature Compensation During Heating29
Return Air Temperature Compensation29
Home Leave Mode29
Fan Circulator Operation30
Auto Fan Speed Control30
Indoor Unit Overload Alarm30
Peak-Cut Timer30
Motion Sensor Control31
Srk Series33
Unit On/Off Button33
Auto Swing Control34
Outline Of Heating Or Cooling Operation36
Indoor Fan Motor Protection36
Serial Signal Transmission Error Protection36
Outline Of Automatic Operation37
Frost Prevention Control39
Outline Of Dehumidifying (Dry) Operation41
Operation Control Function By The Outdoor Control42
Determination Of Compressor Speed (Frequency)42
Compressor Start Control42
Compressor Soft Start Control43
Outdoor Fan Control44
Defrost Operation45
Protective Control/Anomalous Stop Control46
Anomaly Detection Control By The High Pressure Switch47
Low Pressure Control47
Over-Current Protection Current Safe Controls I, Ii47
Power Transistor Protection From Voltage Drop48
Anomalous Power Transistor Current48
Dewing Prevention Control48
Refrigerant Quantity Shortage Protection48
Silent Mode49
Test Run49
Broken Wire Detection On Temperature Sensor49
Fan Motor Error49
Pump-Down Control50
Maintenance Data51
Diagnosing Of Microcomputer Circuit51
Selfdiagnosis Function51
Check Indicator Table51
Display Sequence Of Error Codes Or Inspection Indicator Lamps55
Troubleshooting Procedure56
Error Log And Reset56
Dip Switch Setting List62
Inspection Procedures Corresponding To Detail Of Trouble64
Sensor Error64
Indoor Fan Motor Error64
Error Of Signal Transmission65
Phenomenon Observed After Shor-Tcircuit, Wire Breakage On Sensor66
Humidity Sensor Operation66
Checking The Indoor Electrical Equipment66
Indoor Fan Motor Check Procedure67
Troubleshooting At The Outdoor Unit68
Outdoor Unit Disassembly69
Dip Switch Setting List (Outdoor Unit)77
Check Of Anomalous Operation Data With The Remote Control78
Inverter Checker For Diagnosis Of Inverter Output80
Outdoor Unit Control Failure Diagnosis Circuit Diagram81
Troubleshooting Flow83
Operates But Does Not Cool85
(A) Fdt, Fdtc, Fdu, Fdum, Fde Series85
Operates But Does Not Heat86
Earth Leakage Breaker Activated87
Excessive Noise/Vibration88
Louver Motor Failure (Fdt, Fdtc, Fde Series)91
Power Source System Error (Power Source To Indoor Unit Control Pcb)92
Power Source System Error (Power Source To Remote Control)93
Inspect I/U (When 1 Or 2 Remote Controls Are Connected)94
Inspect I/U (Connection Of 3 Units Or More Remote Controls)95
Wait95
Communication Error At Initial Operation96
No Display99
Remote Control Communication Circuit Error100
Communication Error During Operation101
Indoor Heat Exchanger Temperature Sensor Anomaly102
Return Air Temperature Sensor Anomaly103
Heating Overload Operation104
Drain Trouble (Fdt, Fdtc, Fdu, Fdum Series)105
E10 Excessive Number Of Connected Indoor Units (More Than 17 Units) By Controlling With One Remote Control106
Address Setting Error Of Indoor Units107
Communication Error Between Master And Slave Indoor Units108
Indoor Fan Motor Anomaly109
Address Setting Error Of Master And Slave Indoor Unit110
Indoor Unit Operation Check, Drain Pump Motor Check Setting Error111
Indoor Fan Motor Rotation Speed Anomaly112
Remote Control Temperature Sensor Anomaly113
Cooling Overload Operation114
E36 Discharge Pipe Temperature Error115
Outdoor Heat Exchanger Temperature Sensor Anomaly116
Outdoor Air Temperature Sensor Anomaly117
Discharge Pipe Temperature Sensor Anomaly118
High Pressure Error (63H1 Activated)119
Current Cut120
Control Pcb A/F Module Anomaly122
E48 Outdoor Fan Motor Anomaly123
Low Pressure Error124
E51 Inverter And Fan Motor Anomaly126
Suction Pipe Temperature Sensor Anomaly127
Low Pressure Sensor Anomaly128
Insufficient Refrigerant Amount Or Detection Of Service Valve Closure129
Compressor Startup Failure130
Power Source System Error139
Limit Switch Anomaly141
Room Temperature Sensor Anomaly151
Low Pressure Error Or Low Pressure Sensor Anomaly167
Disassembly Procedure175
Electrical Wiring189
Piping System Diagrams200