Daikin VRV Service Manual

Si30-408
Troubleshooting 67
D. Troubleshooting
D. TroubleshootingD. Troubleshooting
D. Troubleshooting
1. For Troubleshooting ..............................................................................68
2. Check Items before Troubleshooting ....................................................69
2.1 Check Items on Operation Condition (Essential Items as a Minimum) ..69
2.2 Check for Malfunction in Cooling Operation...........................................70
2.3 Check for Malfunction in Heating Operation...........................................71
3. Method of Troubleshooting ...................................................................72
3.1 Excessive / Insufficient Charging of Refrigerant.....................................72
3.2 Abnormal Judgment for Various Sensors...............................................75
3.3 Structure and Operation of Electronic Expansion Valve ........................83
3.4 Structure and Movements of Four-way Valve ........................................85
3.5 Structure and Operation of Solenoid Valve ............................................87
3.6 Structure and Operation of Two-way Solenoid Valve.............................88
3.7 Check on Outdoor Fan Motor.................................................................89
3.8 Diagnosis on Malfunction Code of Inverter System ...............................90
3.9 Diagnosis on Transmission System Malfunction....................................93
4. Malfunction Tree Analysis (FTA)...........................................................96
4.1 Actuation of Freeze-up Prevention Control of Indoor Unit......................97
4.2 Actuation of HPS in Heating Operation ..................................................98
4.3 Abnormal Discharge Pipe Temperature in Cooling Operation ...............99
4.4 Water Leakage from Indoor Unit ..........................................................100
4.5 Defective Lubrication of Compressor ...................................................101
5. List of Malfunction Code......................................................................102
6. Operating Condition Check Sheet.......................................................108

Daikin VRV Specifications

General

Brand	Daikin
Energy Efficiency	High
Control	Centralized and individual zone control
Inverter Technology	Yes
Type	Variable Refrigerant Volume (VRV)
Cooling Capacity	Varies by model
Heating Capacity	Varies by model
Refrigerant	R-32 or R-410A
Application	Commercial buildings, large residential spaces
SEER	Varies by model
HSPF	Varies by model
EER	Varies by model
COP	Varies by model
Sound Level	Varies by model
Indoor Unit Options	wall-mounted, ducted