Part 6 Service Diagnosis - Daikin RZQ Series FCQ20EVA Service Manual

1. Maintenance Inspection ........................................................................71
2. Symptom-based Troubleshooting .........................................................74
3. Troubleshooting by LED Indications .....................................................85
4. Troubleshooting by Remote Controller .................................................86
69
Service Diagnosis
1.1 Overview ................................................................................................71
2.1 Overview ................................................................................................74
2.2 Equipment does not Operate .................................................................75
2.3 Indoor Unit Fan Operates, but Compressor does not Operate ..............76
2.4 Cooling / Heating Operation Starts but Stops Immediately ....................77
2.5 After Unit Shuts Down, It cannot be Restarted for a While ....................78
2.6 Equipment Operates but does not Provide Cooling ...............................80
2.7 Equipment Operates but does not Provide Heating ...............................81
2.8 Equipment Discharges White Mist .........................................................82
2.9 Equipment Produces Loud Noise or Vibration .......................................83
2.10 Equipment Discharges Dust...................................................................84
2.11 Remote Controller LCD Displays "88" ....................................................84
3.1 Troubleshooting by LED on the Indoor Unit ...........................................85
3.2 Troubleshooting by LED on Outdoor Unit PCB ......................................85
4.1 Procedure of Self-diagnosis by Remote Controller ................................86
4.2 Error Codes and Description ..................................................................89
4.3 Safety Devices .......................................................................................90
4.4 Error of External Protection Device ........................................................91
4.5 Indoor Unit PCB Abnormality .................................................................92
4.6 Drain Water Level System Abnormality..................................................93
4.7 Indoor Unit Fan Motor Abnormality ........................................................95
4.8 Swing Flap Motor Abnormality / Lock.....................................................96
4.9 Abnormal Power Supply Voltage............................................................98
4.10 Drain System Abnormality......................................................................99
4.11 Capacity Setting Abnormality ...............................................................100
4.12 Transmission Error between Indoor Unit PCB and Fan PCB...............101
4.13 Thermistor Abnormality ........................................................................103
4.14 Combination Error between Indoor Unit PCB and Fan PCB ................104
4.15 Humidity Sensor System Abnormality ..................................................105
4.16 Room Temperature Thermistor in Remote Controller Abnormality ......106
4.17 Outdoor Unit PCB Abnormality.............................................................107
4.18 High Pressure Abnormality (Detected by the High Pressure Switch)...108
4.19 Low Pressure Abnormality ...................................................................110
4.20 Compressor Motor Lock .......................................................................112
4.21 Outdoor Unit Fan Motor Abnormality....................................................114
4.22 Electronic Expansion Valve Abnormality..............................................116
4.23 Discharge Pipe Temperature Control Error..........................................119
4.24 High Pressure Switch System Abnormality ..........................................121
4.25 Thermistor System Abnormality ...........................................................122
4.26 Pressure Sensor Abnormality...............................................................123
4.27 Outdoor Unit PCB Abnormality.............................................................124
SiME281501E
Part 6
Service Diagnosis