Table Of Contents - Mitsubishi Electric PURY-P72 Service Handbook

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Service handbook (403 pages)

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Service handbook (387 pages)

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Table Of Contents

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Table of Contents

Table of Contents

Safety Precautions2

Before Installing The Unit5

Before The Test Run7

Table Of Contents8

Read Before Servicing8

Iii Outdoor Unit Components8

Iv Remote Controller8

V Electrical Wiring Diagram8

Vi Refrigerant Circuit8

Viii Test Run Mode8

I Read Before Servicing12

Necessary Tools And Materials13

Piping Materials14

Storage Of Piping16

Pipe Processing16

Air Tightness Test18

Vacuum Drying (Evacuation)19

Refrigerant Charging21

Remedies To Be Taken In Case Of A Refrigerant Leak21

Characteristics Of The Conventional And The New Refrigerants22

Notes On Refrigerating Machine Oil23

System Configuration26

Types And Maximum Allowable Length Of Cables27

Switch Settings And Address Settings28

M-Net Address Settings29

Power Supply Switch Connector Connection On The Outdoor Unit31

Settings For The Centralized Control Switch For The Outdoor Unit31

Selecting The Position Of Temperature Detection For The Indoor Unit31

Various Start-Stop Controls (Indoor Unit Settings)32

Various Types Of Control Using Input-Output Signal Connector32

Demand Control34

Contact Input And Control Content34

Sample System Connection35

An Example Of A System To Which An Ma Remote Controller Is Connected37

Group Operation Of Units In A System With Multiple Outdoor Units41

Address Setting Method46

A System With Multiple Bc Controller Connections47

An Example Of A System To Which An Me Remote Controller Is Connected51

An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected53

Restrictions On Pipe Length56

Refrigerant Pipe Size62

Connecting The Bc Controller63

Size Of The Pipe That Fits The Main Bc Controller Ports65

Size Of The Pipe That Fits The Sub Bc Controller Ports66

Outdoor Unit Components68

Outdoor Unit Components And Refrigerant Circuit70

Control Box Of The Outdoor Unit75

Outdoor Unit Circuit Board79

Bc Controller Components89

Control Box Of The Bc Controller92

Bc Controller Circuit Board93

Remote Controller96

Functions And Specifications Of Ma And Me Remote Controllers98

Group Settings And Interlock Settings Via The Me Remote Controller99

Remote Controller Function Selection Via The Me Remote Controller101

Interlock Settings Via The Ma Remote Controller103

Using The Built-In Temperature Sensor On The Remote Controller104

Electrical Wiring Diagram106

Electrical Wiring Diagram Of The Outdoor Unit108

Electrical Wiring Diagram Of The Bc Controller113

Electrical Wiring Diagram Of Transmission Booster123

Refrigerant Circuit124

Refrigerant Circuit Diagram126

Principal Parts And Functions135

Functions And Factory Settings Of The Dipswitches146

Function Of The Switch (Indoor Unit)150

Function Of The Switch - Remote Controller151

Switch Functions - Bc Controller152

Controlling The Outdoor Unit153

Startup Sequence Rotation153

Bypass Control154

Defrost Operation Control156

Starting The Defrost Operation156

Stopping The Defrost Operation157

Problems During Defrost Operation157

Change In The Number Of Operating Indoor Units During Defrost157

Refrigerant Recovery Control158

Capacity Control Of Outdoor Fan And Heat Exchanger159

Control At Initial Start-Up160

Emergency Operation Mode162

Problems With The Outdoor Unit162

Ending The Emergency Operation162

Control Method164

Cooling/Heating Circuit Control165

General Function Of System Equipment165

Operation Mode166

Operation Pattern For Automatic Cooling/Heating Mode166

Relationship Between The Operation Mode And The Load Capacity166

Controlling Bc Controller168

Operation Flow Chart169

Test Run Mode176

Items To Be Checked Before A Test Run178

Test Run Method179

Operating Characteristic And Refrigerant Amount180

Adjusting The Refrigerant Amount180

Amount Of Refrigerant To Be Added181

Refrigerant Amount Adjust Mode183

The Following Symptoms Are Normal185

Standard Operation Data (Reference Data)186

Troubleshooting202

Error Code Lists204

Responding To Error Display On The Remote Controller208

Serial Communication Error208

Panel Communication Error208

Discharge Temperature Fault210

Low Pressure Fault211

High Pressure Fault 1 (Outdoor Unit)212

High Pressure Fault 2 (Outdoor Unit)213

Refrigerant Overcharge213

Drain Sensor Submergence (Models With A Drain Sensor)214

Drain Sensor Submergence (Models With A Float Switch)215

Drain Pump Fault (Models With A Drain Sensor)216

Drain Pump Fault (Models With A Float Switch)217

Drain Sensor (Thd) Fault218

Water Leakage219

Out-Of-Range Outside Air Temperature220

Transmission Power Supply Fault Error Detail Code Ff (Outdoor Unit)223

Indoor Unit Fan Operation Error224

Power Supply Signal Sync Error225

Rpm Error/Motor Error226

Abnormal Bus Voltage Drop227

Abnormal Bus Voltage Rise229

Low Bus Voltage At Startup232

Heatsink Overheat Protection233

Overload Protection235

Dcct Overcurrent239

Instantaneous Overcurrent239

Overcurrent (Effective Value)239

Short-Circuited Ipm/Ground Fault240

Overcurrent Error Due To Short-Circuited Motor241

Heatsink Overheat Protection At Startup241

Return Air Temperature Sensor (Th21) Fault (Indoor Unit)242

Return Air Temperature Sensor (Th4) Fault (Oa Processing Unit)242

Heat Exchanger Outlet Temperature Sensor (Th3) Fault (Outdoor Unit)243

Heatsink Temperature Sensor (Thhs) Fault244

Liquid Inlet Temperature Sensor (Th11) Fault (Bc Controller)245

Bypass Outlet Temperature Sensor (Th12) Fault (Bc Controller)245

Lev3 Outlet Temperature Sensor Fault (Bc Controller)245

High-Pressure Sensor Fault246

High-Pressure Sensor Fault (Outdoor Unit Hps/Bc Controller Ps1)247

Intermediate Pressure Sensor Fault (Bc Controller Ps3)247

Acct Sensor Fault248

Dcct Sensor Fault249

Acct Sensor Circuit Fault249

Dcct Sensor Circuit Fault250

Open-Circuited Ipm/Loose Acct Connector250

Faulty Acct Wiring251

Temperature Sensor Fault253

Loose Float Switch Connector254

Remote Controller Board Fault (Nonvolatile Memory Error)254

Remote Controller Board Fault (Clock Ic Error)254

Address Overlaps255

Polarity Setting Error255

Transmission Processor Hardware Error256

Transmission Line Bus Busy Error257

Communication Error Between Device And Transmission Processors257

No Ack Error258

No Response Error267

Ma Controller Signal Reception Error (No Signal Reception)268

Ma Remote Controller Signal Transmission Error (Synchronization Error)269

Ma Remote Controller Signal Transmission Error (Hardware Error)270

Ma Controller Signal Reception Error (Start Bit Detection Error)271

Total Capacity Error272

Capacity Code Setting Error273

Wrong Number Of Connected Units274

Address Setting Error275

Port Setting Error276

Connection Information Signal Transmission/Reception Error277

Remote Controller Sensor Fault277

Function Setting Error (Incorrect Resistor Connection)278

Model Setting Error279

Incompatible Unit Combination280

Troubleshooting According To The Remote Controller Malfunction281

Outdoor Unit Stops At Times During Operation293

Investigation Of Transmission Wave Shape/Noise294

Troubleshooting Principal Parts297

High-Pressure Sensor297

Low-Pressure Sensor298

Solenoid Valve299

Outdoor Unit Fan304

Lev306

Troubleshooting Principal Parts Of Bc Controller308

Pressure Sensor308

Temperature Sensor310

Troubleshooting Flow Chart For Lev Solenoid Valve312

Troubleshooting Flow Chart For Solenoid Valve Body315

Bc Controller Transformer318

Inverter (Tjmu-A)319

Inverter Output Related Troubles321

Trouble Treatment When The Main Power Breaker Is Tripped324

Checking Procedure For Individual Components Of Main Inverter Circuit325

Intelligent Power Module326

Troubleshooting For Igbt Module327

Inverter (Yjmu-A) - -Nverter-Related Problems329

Checking For Individual Components Of Main Inverter Circuit334

Control Circuit (Tjmu-A)336

Control Power Source Function Block336

Troubleshooting Transmission Power Circuit Of Outdoor Unit338

Control Circuit (Yjmu-A)340

Refrigerant Leak342

Compressor Replacement Instructions344

Servicing The Bc Controller359

Troubleshooting Using The Outdoor Unit Led Error Display362

Led Monitor Display On The Outdoor Unit Board364

How To Read The Led On The Service Monitor366

Time Data Storage Function367

Led Monitor Display368

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