Part 6 Service Diagnosis - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

1. Symptom-based Troubleshooting .........................................................92
2. Troubleshooting by Remote Controller .................................................95
90
Service Diagnosis
2.1 Procedure of Self-diagnosis by Remote Controller ................................95
2.2 PCB Abnormality ..................................................................................104
2.3 Actuation of High Pressure Switch or Pressure Switch........................105
2.4 Actuation of High Pressure Switch (S1PH) or
Pressure Switch (S2P) .........................................................................106
2.5 Actuation of Low Pressure Sensor .......................................................108
2.6 Inverter Compressor Motor Lock..........................................................110
2.7 STD Compressor Motor Overcurrent/Lock...........................................112
2.8 Outdoor Unit Fan Motor Abnormality....................................................113
2.9 Electronic Expansion Valve Coil Abnormality (Y1E~Y3E)....................116
2.10 Abnormal Discharge Pipe Temperature ...............................................118
2.11 Humidity Alarm .....................................................................................120
2.12 Refrigerant Overcharged......................................................................122
2.13 High Pressure Switch System Abnormality ..........................................123
2.14 Abnormal Outdoor Fan Motor Signal....................................................124
2.15 Thermistor System Abnormality ...........................................................126
2.16 High Pressure Sensor Abnormality ......................................................127
2.17 Current Sensor Abnormality .................................................................129
2.18 High Pressure Sensor Abnormality ......................................................130
2.19 Low Pressure Sensor Abnormality .......................................................132
2.20 Inverter PCB Abnormality.....................................................................134
2.21 Inverter Radiation Fin Temperature Rise .............................................136
2.22 Momentary Overcurrent of Inverter Compressor..................................137
2.23 Overcurrent Abnormal of Inverter Compressor ....................................139
2.24 Inverter Compressor Starting Abnormality ...........................................141
2.25 Transmission System Error (between Inverter and Main PCB)............143
2.26 Inverter Over-Ripple Protection............................................................145
2.27 Inverter Radiation Fin Temperature Abnormality .................................147
2.28 Field Setting Abnormality after Replacing Main PCB or
Combination Error of PCB....................................................................148
2.29 Refrigerant Shortage ............................................................................149
2.30 Reverse Phase, Open Phase...............................................................151
2.31 Power Supply Insufficient or Instantaneous Failure .............................152
2.32 Check Operation is not Executed.........................................................155
2.33 Transmission Error (between Indoor and Outdoor Units).....................156
2.34 Transmission Error (between Remote Controller and Indoor Unit) ......159
2.35 Transmission Error (Across Outdoor Units) .........................................160
2.36 Transmission Error (between Main and Sub Remote Controllers).......166
2.37 Transmission Error
(between Indoor and Outdoor Units in the Same System)...................167
2.38 Improper Combination of Indoor and Outdoor Units,
Indoor Units and Remote Controller.....................................................168
2.39 Address Duplication of Centralized Controller......................................172
SiBE341027
Part 6
Service Diagnosis