CS-E21HKDS, CS-E24HKDS, CU-E21HKD, CU-E24HKD - Panasonic Air Conditioner Service Manual (repair manual). Page 2

2

6 Refrigeration Cycle Diagram -------------------------------- 14
7 Block Diagram --------------------------------------------------- 15

7.1. CS-E21HKDS  CU-E21HKD -------------------------- 15
7.2. CS-E24HKDS  CU-E24HKD -------------------------- 16

8 Wiring Connection Diagram --------------------------------- 17

8.1. Indoor Unit ------------------------------------------------- 17
8.2. Outdoor Unit ----------------------------------------------- 18

9 Electronic Circuit Diagram----------------------------------- 20

9.1. Indoor Unit ------------------------------------------------- 20
9.2. Outdoor Unit ----------------------------------------------- 21

10 Printed Circuit Board ------------------------------------------ 23

10.1. Indoor Unit ------------------------------------------------- 23
10.2. Outdoor Unit ----------------------------------------------- 25

11 Installation Instruction ---------------------------------------- 29

11.1. Select The Best Location ------------------------------ 29
11.2. Indoor/Outdoor Unit Installation Diagram ---------- 29
11.3. Indoor Unit ------------------------------------------------- 30
11.4. Outdoor Unit ----------------------------------------------- 33

12 Operation and Control----------------------------------------- 37

12.1. Basic Function -------------------------------------------- 37
12.2. Airflow Direction ------------------------------------------ 39
12.3. Quiet operation (Cooling Mode/Cooling area

of Soft Dry Mode) ---------------------------------------- 40

12.4. Powerful Mode Operation ------------------------------ 41
12.5. ON Timer Control ---------------------------------------- 42
12.6. OFF Timer Control --------------------------------------- 42
12.7. Auto Restart Control------------------------------------- 42
12.8. Indication Panel------------------------------------------- 42
12.9. Patrol Operation ------------------------------------------ 43

12.10. e-ion Operation ------------------------------------------- 45

13 Protection Control ---------------------------------------------- 48

13.1. Protection Control For All Operations --------------- 48
13.2. Protection Control For Cooling & Soft Dry

Operation--------------------------------------------------- 49

13.3. Protection Control For Heating Operation --------- 51

14 Servicing Mode -------------------------------------------------- 52

14.1. Auto OFF/ON Button ------------------------------------ 52
14.2. Select Remote Control Transmission Code ------- 52
14.3. Remote Control Button --------------------------------- 53

15 Troubleshooting Guide---------------------------------------- 54

15.1. Refrigeration Cycle System --------------------------- 54
15.2. Relationship Between The Condition Of The

Air Conditioner And Pressure And Electric
Current ------------------------------------------------------ 55

15.3. Breakdown Self Diagnosis Function ---------------- 56
15.4. Error Codes Table---------------------------------------- 57

16 Disassembly and Assembly Instructions --------------- 58

16.1. Indoor Electronic Controllers, Cross Flow Fan

and Indoor Fan Motor Removal Procedures ------ 58

16.2. Outdoor Electronic Controller Removal

Procedure -------------------------------------------------- 63

17 Technical Data---------------------------------------------------- 64

17.1. Operation Characteristics ------------------------------ 64
17.2. Sensible Capacity Chart-------------------------------- 72

18 Exploded View and Replacement Parts List ----------- 73

18.1. CS-E21HKDS  CS-E24HKDS ------------------------ 73
18.2. CU-E21HKD ----------------------------------------------- 75
18.3. CU-E24HKD ----------------------------------------------- 77