DOWNLOAD Panasonic CS-E21JB4EA / CU-E21HBEA Service Manual ↓ Size: 4.37 MB | Pages: 87 in PDF or view online for FREE

29

(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)

1. Remove the control board cover from the unit by loosening the screw.

2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm

2

 flexible

cord, type designation 245 IEC 57 or heavier cord.

3. Secure the cable onto the control board with the holder

(clamper).

4. Cable connection to the power supply through knife

switch (Disconnecting means).

• Connect the approved polychloroprene sheathed power

supply cable (3 x 1.5 mm

2

), type designation 245 IEC 57

or heavier cord to the terminal board, and connect the
other end of the cable to knife switch (Disconnecting
means).

5. For wire stripping and connection requirement, refer to

instruction 6 of indoor unit.
Note: Knife switch (Disconnecting means) should have
minimum 3.5 mm contact gap.

• Secure the cable onto the control board with the holder

(clamper).

• Power supply earth cable must connect to the left earth

terminal.

1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap

the insulated piping end to prevent water from going inside the piping.

2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E

FOAM with thickness 6 mm or above.

• If a drain elbow is used, the unit should be placed on a stand

which is taller than 3 cm.

• If the unit is used in an area where temperature falls below

0

°C for 2 or 3 days in succession, it is recommended not to

use a drain elbow, for the drain water freezes and the fan will
not rotate.

The following operations can be performed by pressing the
“AUTO” switch.

1. AUTO OPERATION MODE

The Auto operation will be activated immediately once the
Auto Switch is pressed.

2. TEST RUN OPERATION (FOR PUMP DOWN/

SERVICING PURPOSE)
The Test Run operation will be activated if the Auto
Switch is pressed continuously for more than 5 sec. to
below 8 sec. A “pep” sound will occur at the fifth sec., in
order to identify the starting of Test Run operation.

30

1. Press AUTO SW continuously for 11 seconds (buzzer

sound = pep pep pep)

2. After 11 seconds, release AUTO SW, then press Remo-

Con TIMER “

” SW continuously for 5 seconds. Reset

code will be transmitted. After the reset code is

transmitted, release TIMER “

” SW.

3. Press Remo-Con “OFF/ON” button. The new Remo-Con

No. will be accepted and memorized, after which the new
Remo-Con No. can be used.

1. Remove the batteries from the battery compartment of

the Remote Control.

2. On the left side of the battery compartment, there is a

small opening in the centre in which Jumper (J_A) can be
seen. In the accepted Remo-Con PCB shown beside,
Jumper (J_B) can be seen.

• Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature

control, etc.)

• With regards to installation of the parts sold separately, follow the installation manual which is provided with the parts sold

separately.

J_A

J_B

Remo-Con No.

Short

Open

A (Default)

Open

Open

B

Short

Short

C

Open

Short

D

Is there any gas leakage at flare nut connections?

Is the cooling/heating operation normal?

Has the heat insulation been carried out at flare nut connections?

Is the indoor unit properly secured to the installation plate?

Is the connecting cable being fixed to the terminal board firmly?

Is the power supply voltage complied with rated value?

Is the connecting cable being clamped firmly?

Is there any abnormal sound?

Is the drainage OK?

Is the thermostat operation normal?

Is the Earth wire connection properly done?

Is the remote control’s LCD operation normal?

31

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.

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.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5

°C.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF

point.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperate < -2.0

°C.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF

point.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperate > +2.0

°C.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF

point.

32

• This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control

operation mode, indoor intake air temperature and outdoor air temperature.

• During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to

detect the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.

Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature, the value of T1 will
increase up to 10

°C, T2 will decreased by 3°C and T3 will decreased up to 8°C.

The Auto Operation Mode shifting will take place whenever operation mode changed from Cooling/Soft Dry to Heating or vice
versa.

A. Basic Rotation Speed (rpm)
i. Manual Fan Speed
[Cooling, Dry]

• Fan motor’s number of rotation is determined according to remote control setting.

[Heating]

• Fan motor’s number of rotation is determined according to remote control setting.

ii. Auto Fan Speed
[Cooling, Dry]

• According to room temperature and setting temperature, indoor fan speed is determined automatically.
• The indoor fan will operate according to pattern below.

Remote Control

O

O

O

O

O

Tab (rpm)

Hi

Me+

Me

Me-

Lo

Remote Control

O

O

O

O

O

Tab (rpm)

Shi

Me+

Me

Me-

Lo