Daikin SUPER MULTI NX G Series - Page 99

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SiUS12-928_A

Service Diagnosis 90

Main Page

Table of Contents2
Safety Considerations8
Safety Considerations for Repair8
Safety Considerations for Users9
List of Functions10
Functions12
Specifications16
Specifications18
Indoor Unit18
Outdoor Unit20
Printed Circuit Board Connector Wiring Diagram24
Printed Circuit Board Connector Wiring Diagram26
Indoor Unit - Duct-Free System26
Indoor Unit - Slim Duct Built-In System28
Outdoor Unit - 2MXS18GVJU30
Outdoor Unit - 3MXS24JVJU, 4MXS32GVJU33
Function and Control36
Main Functions38
Temperature Control38
Frequency Principle38
Airflow Direction Control (Duct-Free System)40
Fan Speed Control for Indoor Units41
Program Dry Operation42
Automatic Operation43
Thermostat Control44
NIGHT SET Mode45
HOME LEAVE Operation46
INTELLIGENT EYE Operation47
Inverter POWERFUL Operation48
Other Functions49
Function of Thermistor51
Control Specification53
Mode Hierarchy53
Frequency Control54
Controls at Mode Changing / Start-Up56
Discharge Pipe Temperature Control58
Input Current Control58
Freeze-Up Protection Control59
Heating Peak-Cut Control59
Outdoor Fan Control60
Liquid Compression Protection Function60
Defrost Control61
Low Hz High Pressure Limit62
Electronic Expansion Valve Control62
Malfunctions66
Forced Operation Mode68
Operation Manual70
System Configuration72
Duct-Free System73
Remote Controller73
AUTO · DRY · COOL · HEAT · FAN Operation75
Adjusting the Airflow Direction77
INTELLIGENT EYE Operation79
POWERFUL Operation81
OUTDOOR UNIT Quiet Operation82
HOME LEAVE Operation83
TIMER Operation85
Note for Multi System87
Slim Duct Built-In System89
Remote Controller89
AUTO / DRY / COOL / HEAT / FAN Operation90
POWERFUL Operation92
OUTDOOR UNIT QUIET Operation93
HOME LEAVE Operation94
TIMER Operation96
Service Diagnosis98
Caution for Diagnosis100
Troubleshooting with LED100
Problem Symptoms and Measures102
Service Check Function103
ARC452 Series Remote Controller103
ARC433 Series Remote Controller106
Code Indication on the Remote Controller109
Error Codes and Description of Fault109
Troubleshooting110
Indoor Unit110
Outdoor Unit111
Indoor Unit PCB Abnormality112
Freeze-Up Protection Control or Heating Peak-Cut Control113
Fan Motor or Related Abnormality115
Thermistor or Related Abnormality (Indoor Unit)118
Signal Transmission Error (between Indoor and Outdoor Units)119
Unspecified Voltage (between Indoor and Outdoor Units)121
Anti-Icing Function122
Outdoor Unit PCB Abnormality (24/32 Class)124
OL Activation (Compressor Overload)125
Compressor Lock126
DC Fan Lock127
Input Overcurrent Detection128
Four-Way Valve Abnormality (18 Class)130
Discharge Pipe Temperature Control132
High Pressure Control in Cooling133
Compressor Sensor System Abnormality (24/32 Class)135
Position Sensor Abnormality137
CT or Related Abnormality140
Thermistor or Related Abnormality (Outdoor Unit)142
Electrical Box Temperature Rise144
Radiation Fin Temperature Rise147
Output Overcurrent Detection150
Refrigerant Shortage152
Low-Voltage Detection or Over-Voltage Detection155
Signal Transmission Error (on Outdoor Unit PCB) (24/32 Class)156
Signal Transmission Error (on Outdoor Unit PCB) (24/32 Class)147156
Unspecified Voltage (between Indoor and Outdoor Units) / Anti-Icing Function in Other Rooms157
Tion in Other Rooms157
Check158
How to Check158
Removal Procedure168
Outdoor Unit - 2MXS18GVJU170
Removal of the Outer Panels170
Removal of the Electrical Box171
Removal of the PCB175
Removal of the Fan Motor179
Removal of the Sound Blanket180
Removal of the Coils and Thermistors182
Removal of the Four-Way Valve and Defrost Solenoid Valve Procedure184
Removal of the Compressor186
Outdoor Unit - 3MXS24JVJU / 4MXS32GVJU188
Removal of the Outer Panels188
Removal of the Electrical Box202
Removal of the PCB208
Removal of the Fan Motor213
Removal of the Coils and Thermistors214
Removal of the Sound Blanket220
Removal of the Compressor223
Trial Operation and224
Field Settings224
Trial Operation226
Wiring Error Check Function228
Field Settings230
Priority Room Setting230
COOL / HEAT Mode Lock230
NIGHT QUIET Mode231
When 2 Units Are Installed in 1 Room232
Application of Silicon Grease to a Power Transistor and a Diode Bridge224233
Appendix234
Piping Diagrams236
Indoor Unit236
Outdoor Unit237
Wiring Diagrams239
Indoor Unit239
Outdoor Unit241

Daikin SUPER MULTI NX G Series - Page 99

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