CS-E21HKES, CU-E21HKE, CS-E24HKES, CU-E24HKE, CS-E28HKE, CU-E28HKE - Panasonic Air Conditioner Service Manual (repair manual). Page 2

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5.2. Outdoor Unit ----------------------------------------------- 14

6 Refrigeration Cycle Diagram -------------------------------- 16
7 Block Diagram --------------------------------------------------- 17

7.1. CS-E21HKES  CU-E21HKE--------------------------- 17
7.2. CS-E24HKES  CU-E24HKECS-E28HKE  CU-

E28HKE ---------------------------------------------------- 18

8 Wiring Connection Diagram --------------------------------- 19

8.1. Indoor Unit ------------------------------------------------- 19
8.2. Outdoor Unit ----------------------------------------------- 20

9 Electronic Circuit Diagram----------------------------------- 23

9.1. Indoor Unit ------------------------------------------------- 23
9.2. Outdoor Unit ----------------------------------------------- 24

10 Printed Circuit Board ------------------------------------------ 27

10.1. Indoor Unit ------------------------------------------------- 27
10.2. Outdoor Unit ----------------------------------------------- 29

11 Installation Instruction ---------------------------------------- 33

11.1. Select The Best Location ------------------------------ 33
11.2. Indoor/Outdoor Unit Installation Diagram ---------- 33
11.3. Indoor Unit ------------------------------------------------- 34
11.4. Outdoor Unit ----------------------------------------------- 37

12 Operation and Control----------------------------------------- 41

12.1. Basic Function -------------------------------------------- 41
12.2. Airflow Direction ------------------------------------------ 43
12.3. Quiet operation (Cooling Mode/Cooling area

of Soft Dry Mode) ---------------------------------------- 44

12.4. Powerful Mode Operation ------------------------------ 45
12.5. ON Timer Control ---------------------------------------- 46
12.6. OFF Timer Control --------------------------------------- 46
12.7. Auto Restart Control------------------------------------- 46
12.8. Indication Panel------------------------------------------- 46
12.9. Patrol Operation ------------------------------------------ 47

12.10. e-ion Operation ------------------------------------------- 49

13 Protection Control ---------------------------------------------- 52

13.1. Protection Control For All Operations --------------- 52
13.2. Protection Control For Cooling & Soft Dry

Operation--------------------------------------------------- 53

13.3. Protection Control For Heating Operation --------- 55

14 Servicing Mode -------------------------------------------------- 56

14.1. Auto OFF/ON Button ------------------------------------ 56
14.2. Select Remote Control Transmission Code ------- 56
14.3. Remote Control Button --------------------------------- 57

15 Troubleshooting Guide---------------------------------------- 58

15.1. Refrigeration Cycle System --------------------------- 58
15.2. Relationship Between The Condition Of The

Air Conditioner And Pressure And Electric
Current ------------------------------------------------------ 59

15.3. Breakdown Self Diagnosis Function ---------------- 60
15.4. Error Codes Table---------------------------------------- 61

16 Disassembly and Assembly Instructions --------------- 62

16.1. Indoor Electronic Controllers, Cross Flow Fan

and Indoor Fan Motor Removal Procedures ------ 62

16.2. Outdoor Electronic Controller Removal

Procedure -------------------------------------------------- 67

17 Technical Data---------------------------------------------------- 68

17.1. Operation Characteristics ------------------------------ 68
17.2. Sensible Capacity Chart-------------------------------- 80

18 Exploded View and Replacement Parts List ----------- 81

18.1. CS-E21HKES  CS-E24HKES  CS-E28HKE ------ 81
18.2. CU-E21HKE ----------------------------------------------- 83
18.3. CU-E24HKE  CU-E28HKE ---------------------------- 85