Table Of Contents - Carrier 38GRQB12-3 Service Manual

Table of Contents

Table Of Contents1
Safety Considerations1
Introduction1
Model / Serial Number Nomenclature2
Standard Features And Accessories3
Condensate Pump Accessory3
Crankcase Heater3
Specifications - Heat Pump Units (Grq Series)4
Dimensions5
Clearances7
Electrical Data7
Connection Diagram8
Power Wiring8
Communication Wiring8
Wiring Diagrams9
Refrigeration System Diagram12
Refrigerant Lines13
System Evacuation And Charging13
System Vacuum And Charge13
Using Vacuum Pump13
Control System14
Compressor Top Temperature Protection14
Compressor Discharge Temperature Protection14
Inverter Module Protection14
System Safeties14
Sequence Of Operation15
Modes Of Operation15
Cooling Mode15
Compressor Preheating Function15
Heating Mode16
Outdoor/Indoor Fan Operation In Heating Mode16
Auto Mode In Heating Mode16
Defrost16
Auto Mode17
Forced Operation Function17
Timer Function17
Sleep Mode Function17
Troubleshooting18
Auto-Restart Function18
Indoor Unit Troubleshooting Charts22
Malfunction Of Temperature Sensor F1, F222
Troubleshooting For Main Malfunction22
Malfunction Of Blocked Protection Of Idu Fan Motor H623
Malfunction Of Protection Of Jumper Cap C524
Malfunction Of Over Current Protection E525
Communication Malfunction E626
Outdoor Unit Troubleshooting Charts27
Capacity Charging Malfunction (Outdoor Unit Malfunction)27
Ipm Protection (H5), De- Synchronizing Malfunction (H7)28
High Temperature And Overload Protection (E8)29
Start-Up Failure (Lc) (Ap1 Below Means Control Board Of Outdoor Unit)30
Overload And High Discharge Temperature Malfunction31
Pfc (Correction For Power Factor) Malfunction (Outdoor Unit)32
Communication Malfunction (E6)33
Key Detection Point34
Capacity Charging Malfunction35
Ipm Protection, De- Synchronizing Malfunction36
Phase Current Of Compressor Is Over Current36
Diagnosis For Anti-High Temperature, Overload Protection37
Diagnosis For Failure Start Up Malfunction38
Diagnosis For Compressor Synchronism39
Diagnosis For Overboard And Discharge Malfunction40
Pfc (Correction For Power Factor) Malfunction41
Communication Malfunction (Ap1 Below Is Control Board Of Outdoor Unit)42
Diagnosis Process For Outdoor Communication Circuit43
Troubleshooting For Normal Malfunction44
Air Conditioner Can Not Start Up44
Poor Cooling (Heating) For Air Conditioner44
Horizontal Louver Can Not Swing44
Odu Fan Motor Can Not Operate45
Compressor Can Not Operate45
Air Conditioner Is Leaking45
Abnormal Sound And Vibration45
Exploded Views And Parts Lists46
Removal Procedure52
Indoor Unit Removal Procedure52
Outdoor Unit Removal Procedure61
Disassembly72
Removal Procedure Of Outdoor Unit79
Reference Sheet Of Celsius And Fahrenheit90
Configuration Of Connection Pipe90
Pipe Expanding Method91
List Of Resistanc For Temperature Sensor92
Resistance Table Of Tube Temperature Sensors For Indoor And Outdoor93
Resistance Table Of Discharge Temperature Sensor For Outdoor (50K)94
Unit Breakdowns95