Panasonic CU-E28EKES [35/77] Operation and function

Carry out test running to confirm that no abnormality occurs after the servicing then explain to user the operation care and maintenance as stated in instructions please remind the customer to keep the operating instructions for future reference 3

Read the following safety precautions carefully before perform any servicing electrical work must be installed or serviced by a licensed electrician be sure to use the correct rating of the power plug and main circuit for the model installed the caution items stated here must be followed because these important contents are related to safety the meaning of each indication used is as below incorrect installation or servicing due to ignoring of the instruction will cause harm or damage and the seriousness is classified by the following indications 3

Safety precautions 3

The items to be followed are classified by the symbols 3

Cs e24ekes cu e24eke 5

Specifications 5

Specifications are subject to change without notice for further improvement 6

Cs e28eke cu e28eke 7

Specifications are subject to change without notice for further improvement 8

Features 9

Location of controls and components 10

Example for e24ek if the unit is installed at a 20 m distance the quantity of additional refrigerant should be 300 g 20 10 m x 30 g m 300 g 28

Indoor outdoor unit installation diagram 28

Indoor unit there should not be any heat source or steam near the unit there should not be any obstacles blocking the air circulation a place where air circulation in the room is good a place where drainage can be easily done a place where noise prevention is taken into consideration do not install the unit near the door way ensure the spaces indicated by arrows from the wall ceiling fence or other obstacles recommended installation height for indoor unit shall be at least 2 m 28

Installation instruction 28

Outdoor unit if an awning is built over the unit to prevent direct sunlight or rain be careful that heat radiation from the condenser is not obstructed there should not be any animal or plant which could be affected by hot air discharged keep the spaces indicated by arrows from wall ceiling fence or other obstacles do not place any obstacles which may cause a short circuit of the discharged air if piping length is over 10 m additional refrigerant should be added as shown in the table 28

Select the best location 28

How to fix installation plate 29

Indoor unit 29

Indoor unit installation 29

To drill a hole in the wall and install a sleeve of piping 29

Connect the cable to the indoor unit 31

Connecting the piping 32

Install the outdoor unit 32

Outdoor unit 32

Evacuation of the equipment 33

Connect the cable to the outdoor unit 34

Airflow direction 35

Basic function 35

Internal setting temperature 35

Inverter control which equipped with a microcomputer in determining the most suitable operating mode as time passes automatically adjusts output power for maximum comfort always in order to achieve the suitable operating mode the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting the compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that judging the condition according to internal setting temperature and intake air temperature 35

Once the operation starts remote control setting temperature will be taken as base value for temperature shifting processes these shifting processes are depending on the air conditioner settings and the operation environment the final shifted value will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit 35

Operation and function 35

There are two types of airflow vertical airflow directed by horizontal vane and horizontal airflow directed by vertical vanes 2 control of airflow direction can be automatic angles of direction is determined by operation mode heat exchanger temperature and intake air temperature and manual angles of direction can be adjusted using remote control vertical airflow 35

A purpose to provide quiet cooling operation compare to normal operation 36

Automatic vertical airflow direction can be set using remote control the vane swings up and down within the angles as stated above for heating mode operation the angle of the vane depends on the indoor heat exchanger temperature as figure 1 below when the air conditioner is stopped using remote control the vane will shift to close position 36

B control condition a quiet operation start condition when quiet button at remote control is pressed quiet led illuminates 36

Horizontal airflow 1 automatic horizontal airflow direction can be set using remote control the vane swings left and right within the angles as stated below for heating mode operation the angle of the vane depends on the indoor heat exchanger temperature as figure 1 below 36

Manual horizontal airflow direction can be set using remote control the angles of the vane are as stated below and the positions of the vane are as figure 2 above 36

Manual vertical airflow direction can be set using remote control the angles of the vane are as stated above and the positions of the vane are as figure 2 below when the air conditioner is stopped using remote control the vane will shift to close position 36

Quiet operation cooling mode cooling area of soft dry mode 36

Quiet operation heating 37

Quiet operation under soft dry operation dry area at soft dry mode 37

On timer control 38

Powerful mode operation 38

Auto restart control 39

Ionizer operation 39

Off timer control 39

30 seconds forced operation 40

A overheating prevention control 1 when the ipm temperature rises to 110 c compressor operation will stop immediately 40

B dc peak current control 1 when electric current to ipm exceeds set value of 30 5 a the compressor will stop operate then operation will restart after three minutes 40

Compressor operation restarts after three minutes the temperature decreases to 95 c 40

However if total outdoor unit running current exceeds y value compressor will be stopped immediately for 2 minutes 40

If the running current does not exceed x value for five seconds the frequency instructed will be increased 40

If the set value is exceeded again more than 30 seconds after the compressor starts the operation will restart after two minutes 40

If the set value is exceeded again within 30 seconds after the compressor starts the operation will restart after one minute if this condition repeats continuously for seven times all indoor and outdoor relays will be cut off 40

Ipm power transistor prevention control 40

Once the compressor starts operation it will not stop its operation for 30 seconds 2 however it can be stopped using remote control or auto switch at indoor unit 40

Protection control 40

Protection control for all operations 40

The compressor will not start for three minutes after stop of operation 2 this control is not applicable if the power supply is cut off and on again or after 4 way valve deices condition 40

The first 30 minutes of cooling operation a will be applied 40

Time delay safety control 40

Total running current control 40

When the outdoor unit total running current ac exceeds x value the frequency instructed for compressor operation will be decreased 40

Compressor overheating prevention control 41

Cooling overload control 41

Outdoor air temperature control 41

Protection control for cooling soft dry operation 41

Freeze prevention control 42

Intake air temperature control 42

Outdoor air temperature control 42

Protection control for heating operation 42

Overload protection control 43

Auto switch operation 44

Selecting the wireless remote control transmission code 44

Servicing mode 44

Indication panel 45

Note if power led is blinking the possible operations of the unit are hot start during deice operation operation mode judgment or delay on timer sampling if timer led is blinking there is an abnormality operation occurs if ionizer led is blinking there is an abnormality of ionizer occurs 45

Refrigeration cycle system 46

Troubleshooting guide 46

Carry out the measurements of pressure electric current and temperature fifteen minutes after an operation is started 47

Relationship between the condition of the air conditioner and pressure and electric current 47

Breakdown self diagnosis function 48

Self diagnosis function three digits alphanumeric code 48

Error codes table 49

Note o frequency measured and fan speed fixed 49

The memory data of error code is erased when the power supply is cut off or press the auto switch until beep sound heard following by pressing the check button at remote control although operation forced to stop when abnormality detected emergency operation is possible for certain errors refer to error codes table by using remote control or auto switch at indoor unit however the remote control signal receiving sound is changed from one beep to four beep sounds 49

Disassembly and assembly instructions 50

Cs e24ekes cu e24eke 54

Operation characteristics 54

Technical data 54

Cs e28eke cu e28eke 62

Cs e24ekes cu e24eke 70

Cs e28eke cu e28eke 70

Sensible capacity chart 70

Cs e24ekes cs e28eke 71

Exploded view and replacement parts list 71

Note all parts are supplied from phaam malaysia vendor code 061 o marked parts are recommended to be kept in stock 72

Note all parts are supplied from phaam malaysia vendor code 061 o marked parts are recommended to be kept in stock 77

Phaam printed in malaysia sfyw060 3 0 2 77

Panasonic CU-E28EKES [35/77] Operation and function

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