DOWNLOAD Panasonic CS-A28JKD / CU-A28JKD Service Manual ↓ Size: 5.64 MB | Pages: 64 in PDF or view online for FREE

45

Deice starts to prevent frosting at outdoor heat exchanger.

• Normal Deice

Deice operation detection commences in Heating operation starts or 60 minutes after previous deice operation. If the outdoor
piping temperature drops to -4°C for 50 sec. continuously during compressor is in operation, deice will start.
(There is no detection during Outdoor Fan stops.)

• Overload Deice

During heating operation, if the outdoor Fan OFF duration (due to overload protection control) is accumulated up to 60 minutes
and after compressor starts for 1 minutes, deice starts.

• Deice ends when

(a) 12 minutes after deicing operation starts;
(b) The outdoor piping temperature rises to about 12°C.

• After deice operation, compressor stops for 30 seconds and 4-way valve stays at cooling position for 10 seconds.

46

47

1. AUTO OPERATION MODE

The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to
operate air conditioner with limited function if remote control is misplaced or malfunction.

2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)

The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds. A “beep”
sound will occur at the fifth seconds, in order to identify the starting of Test Run operation.

3. VARIOUS SETTING MODE

The Various Setting Mode will be activated if (within 20 seconds of Test Run Operation) the Auto OFF/ON button is pressed
for more than 5 seconds. 2 "beep" sound will be heard to identify the starting of this operation.

Under Various Setting Mode, user could perform the following operation:
a) REMOTE CONTROL RECEIVING SOUND OFF/ON

Press Auto OFF/ON button to toggle remote control receiving sound.
- Short "beep": Turn ON remote control receiving sound.
- Long "beep": Turn OFF remote control receiving sound.
After Auto OFF/ON Button is pressed, the 20 seconds counter for Various Setting Mode is restarted.

b)  REMOTE CONTROL NUMBER SWITCH

• There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor unit. The

indoor unit will only operate when received signal with same transmission code from remote control. This could prevent
signal interference when there are 2 or more indoor units installed nearby together.

• To change remote control transmission code, short or open jumpers at the remote control printed circuit board.

• Under various setting mode, after select the transmission code combination of remote control, press any button of

remote control to transmit a signal to indoor unit. The transmission code will be stored in EEPROM.

• After signal is received, the various setting mode is cancelled and return to normal operation.
• If there is no code is transmitted or AUTO OFF/ON button is not pressed within 20 seconds, the Various Setting Mode

will be cancelled.

48

• To check current remote control transmission code

- Press for more than 10 seconds
- Press “TIMER SET” button until a “beep” sound is heard as confirmation of transmission code change.

• To change the air quality sensor sensitivity

- Press and release with pointer.
- Press the Timer Decrement button to select sensitivity:

1. Low Sensitivity
2. Standard (Default)
3. Hi Sensitivity

- Confirm setting by pressing Timer Set button, a “Beep” sound will be heard. LCD returns to original display after 2 seconds.
- LCD returns to original display if remote control does not operate for 30 seconds

• To change the remote control’s time format.

- Press for more than 5 seconds

• To clear and restore the remote control setting to factory default

- Press once to clear the memory.

• To change indoor unit indicator’s LED intensity

- Press continuously for 5 seconds.

• To change remote control display from Degree Celsius (

qC) to Degree Fahrenheit (qF).

- Press continuously for 10 seconds.