Daikin EWAD900BJYNN/A [257/346] Part 3 troubleshooting

ESIE07-04

Part 3 – Troubleshooting 3–1

Part 3

Troubleshooting

Introduction When a problem occurs, all possible faults have to be checked. This chapter gives a general idea of

where to look for faults. Furthermore the general procedures for refrigeration circuit repair and for

electrical circuit repair are explained.

Remark Not all repair procedures are described. Some procedures are considered common practice.

What is in this part? This part contains the following chapters:

Chapter See page

1–Overview of Fault Indications and Safeties 3–3

2–Checking the Inputs and Outputs 3–7

3–Procedure for Software Upload/Download 3–13

4–Procedure to Protect Compressor in Case of Frozen Evaporator 3–33

5–Procedure to Clear the Refrigerant Circuit in Case of Frozen Evaporators 3–35

6–Procedure for the Changing and Configuration of the Display 3–37

7–Procedure for the Changing and Configuration of the PCO² (“I/O Board”) 3–41

8–Procedure for the Changing of the Electronic Expansion Valve Driver 3–43

9–Procedure for the Changing and Configuration of the Expansion I/O Board

(Optional)

3–45

10–Manual Upload or Download Control Test Procedure 3–47

11–Troubleshooting Chart 3–49

12–Prestart System Checklist 3–55