Table Of Contents - York DHM42CMB21S Service Manual

Table of Contents

Service Manual1
Important Notice2
Product Inspection Upon Arrival2
Table Of Contents3
Important Safety Instructions4
General Precautions4
Installation Precautions5
Refrigerant Precautions6
Electrical Precautions7
Units And Features9
Specifications10
Construction Views12
Refrigerant System Diagram14
Schematic Diagram16
Electrical Data16
Electrical Wiring16
Printed Circuit Board19
Top View20
Bottom View20
Function And Control24
Basic Functions Of The System24
Cooling Mode24
Dry Mode24
Heating Mode24
Protection Function25
Fan Mode25
Mode Conflict Protection Of Indoor Unit25
Overload Protection Function25
Communication Malfunction26
Compressor High-Pressure Protection26
Compressor Overload Protection26
Compressor Phase Lock-Out Protection26
Overcurrent Protection26
Ipm Protection26
Function Control27
Overload Protection27
High Exhaust Temperature Protection27
Other Functions28
System High-Pressure Protection28
System Low-Pressure Protection28
Refrigerant Recovery28
Troubleshooting29
Malfunction Indicator29
Malfunction Checking And Elimination30
Ipm Protection Malfunction30
Main Checking Point30
Energize The Unit31
Pfc Protection Malfunction32
Capacity Charging Malfunction33
Energize The Unit And Wait For 1 Min33
Anti-High Temperature And Overload Malfunction34
Temperature Sensor Malfunction35
Start Failure Malfunction36
Energize And Start The Unit36
Communication Malfunction Of Some Indoor Units37
All The Indoor Units Appear Communication Malfunction38
Compressor Overload, Diacharge Protection Malfunction39
Compressor Desynchronizing Malfunction40
The Unit Appears Desynchronizing As Soon As Energizing And Starting40
Check Before Contacting Service Center41
Problem Handling42
Malfunction Display: E1 Compressor High Pressure Protection48
Malfunction Display: E3 Compressor Low Pressure Protection49
Malfunction Display: E4 Compressor Exhaust High Temperature Protection50
Malfunction Display: E5 Compressor Overheat50
Malfunction Display: E9 Full Water Protection51
Malfunction Display: F2 Failure Of Evaporator Temp. Sensor51
Malfunction Display: F3 Failure Of Outdoor Ambient Sensor52
Malfunction Display: F5 Failure Of Exhaust Temp. Sensor52
Removal Procedures53
Before Disassembly66
Remove Top Panel66
Remove Front Side Plate66
Disassembly And Assembly Of Outer Casing72
Disassemble The Cover Plate72
Disassemble The Front Panel72
Disassemble The Panel On The Right Side72
Remove The Grille73
Disassemble The Outer Casing73
Disassemble The Fan Blades73
Disassembly And Assembly Of Compressor74
Disconnect The Power Cord74
Disassemble The Pipeline Connected With Compressor74
Disassembly And Assembly Of 4-Way Valve75
Remove The 4-Way Valve Coil75
Disassembly And Assembly Of Electronic Expansion Valve77
Disassembly And Assembly Of Vapor Liquid Separator78