Daikin EWAQ005AAV3P [5/170] Part 3 troubleshooting

ESIE06-04

Table of Contents iii

Part 3

Troubleshooting

1 Troubleshooting

1.1 What Is in This Chapter? ........................................................................ 3–3

1.2 Procedure of Self-Diagnosis by Remote Controller ................................ 3–4

1.3 Fault-diagnosis by Remote Controller..................................................... 3–5

1.4 Overview of Error Codes......................................................................... 3–6

2 Error Codes: Hydro-kit

2.1 What Is in This Chapter? ........................................................................ 3–7

2.2 “A1” Hydro-kit PCB Abnormality............................................................... 3–8

2.3 “A5” Freeze-up Protection Control or High Pressure Control.................. 3–9

2.4 “C4, 81, 80” Thermistor or Related Abnormality (Hydro-kit) ...................... 3–10

3 Error Codes: Outdoor Units

3.1 What Is in This Chapter? ........................................................................ 3–11

3.2 “E1” Outdoor Unit PCB Abnormality ......................................................... 3–12

3.3 “E5” OL Activation (Compressor Overload)............................................. 3–13

3.4 “E6” Compressor Lock............................................................................. 3–15

3.5 “E7” DC Fan Lock .................................................................................... 3–16

3.6 “E8” Input Over Current Detection........................................................... 3–17

3.7 “EA” Four Way Valve Abnormality ........................................................... 3–19

3.8 “F3” Discharge Pipe Temperature Control............................................... 3–21

3.9 “F6” High Pressure Control in Cooling..................................................... 3–23

3.10 “H0” Compressor Sensor System Abnormality........................................ 3–25

3.11 “H6” Compressor Startup Failure ............................................................ 3–27

3.12 “H8” CT or Related Abnormality .............................................................. 3–29

3.13 “P4, J3, J6, H9” Thermistor or Related Abnormality (Outdoor Unit).......... 3–31

3.14 “L3” Switch Box Temperature Rise.......................................................... 3–33

3.15 “L4” Radiation Fin Temperature Rise...................................................... 3–35

3.16 “L5” Output Over Current Detection ........................................................ 3–37

4 Error Codes: System Malfunctions

4.1 What Is in This Chapter? ........................................................................ 3–41

4.2 “U0” Insufficient Gas................................................................................ 3–42

4.3 “U2” Low-voltage Detection or Over-voltage Detection ........................... 3–44

4.4 “U4” Signal Transmission Error (between Hydro-kit and

Outdoor Units)......................................................................................... 3–45

4.5 “U7” Malfunction of Transmission between Remote Controller and

Control box.............................................................................................. 3–47