Panasonic CS-BE20TKD / CU-BE20TKD Service Manual ▷ View online
41
13.3.7 Low Pressure Protection Control
During low ambient heating operation, if the pipe temperature drops below -24°C, the max frequency will be
reduced and limited.
If it does not rises after 3 minutes, the compressor will stop.
The compressor will start again if the pipe temperature rises above -20°C.
42
14. Servicing
Mode
14.1 Auto OFF/ON Button
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.
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 heard at the fifth seconds, in order to identify the starting of Test Run
operation (Forced cooling operation). Within 5 minutes after Forced cooling operation start, the Auto OFF/ON
button is pressed for more than 5 seconds. A 2 “beep” sounds will heard at the fifth seconds, in order to
identify the starting of Forced heating operation.
The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air
conditioner operation.
5 seconds. A “beep” sound will heard at the fifth seconds, in order to identify the starting of Test Run
operation (Forced cooling operation). Within 5 minutes after Forced cooling operation start, the Auto OFF/ON
button is pressed for more than 5 seconds. A 2 “beep” sounds will heard at the fifth seconds, in order to
identify the starting of Forced heating operation.
The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air
conditioner operation.
3 REMOTE CONTROL NUMBER SWITCH MODE
The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed
continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote
Control Number Switch Mode is in standby condition) and press “AC RESET” button and then press any
button at remote control to transmit and store the desired transmission code to the EEPROM.
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.
continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote
Control Number Switch Mode is in standby condition) and press “AC RESET” button and then press any
button at remote control to transmit and store the desired transmission code to the EEPROM.
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.
Remote Control Printed Circuit Board
Jumper A (JA)
Jumper B (JB)
Remote Control No.
Short Open
A
(Default)
Open Open
B
Short Short
C
Open Short
D
During Remote Control Number Switch Mode, press any button at remote control to transmit and store
the transmission code to the EEPROM.
JA
JB
43
4 REMOTE CONTROL RECEIVING SOUND OFF/ON MODE
The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed
continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote
Control Receiving Sound Off/On Mode is in standby condition) and press “AC Reset” button at remote
control.
Press “Auto OFF/ON button” to toggle remote control receiving sound.
continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote
Control Receiving Sound Off/On Mode is in standby condition) and press “AC Reset” button at remote
control.
Press “Auto OFF/ON button” to toggle remote control receiving sound.
o
Short “beep”: Turn OFF remote control receiving sound.
o
Long “beep”: Turn ON remote control receiving sound.
After Auto OFF/ON Button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON
Mode is restarted.
14.2 Remote Control Button
14.2.1 SET
Button
To check remote control transmission code and store the transmission code to EEPROM:
o
Press “Set” button by using pointer.
o
Press “Timer Set” button until a “beep” sound is heard as confirmation of transmission code changed.
To limit set temperature range for COOL & DRY, HEAT mode.
o
Press “Set” button by using pointer.
o
Press TEMP increment or decrement button to choose No. 3.
o
Press Timer increment or decrement button to select desired temperature low limit of set temperature for
COOL & DRY mode.
o
Press Timer Set button to confirm low limit selection.
o
Press TEMP increment or decrement button to choose No. 4.
o
Press Timer decrement or increment button to select desired temperature high limit of set temperature for
COOL & DRY mode.
o
Press Timer Set button to confirm high limit selection.
o
Press TEMP increment or decrement button to choose No. 5.
o
Press Timer increment or decrement button to select desired temperature low limit of set temperature for
HEAT mode.
o
Press Timer Set button to confirm low limit selection.
o
Press TEMP increment or decrement button to choose No. 6.
o
Press Timer decrement or increment button to select desired temperature high limit of set temperature for
HEAT mode.
o
Press Timer Set button to confirm high limit selection.
o
LCD returns to original display if remote control does not operate for 30 seconds or press Timer Cancel
button.
14.2.2 RESET
(RC)
To clear and restore the remote control setting to factory default.
o
Press once to clear the memory.
14.2.3 RESET
(AC)
To restore the unit’s setting to factory default.
o
Press once to restore the unit’s setting.
14.2.4 TIMER
▲
To change indoor unit indicator’s LED intensity.
o
Press continuously for 5 seconds.
14.2.5 TIMER
▼
To change remote control display from Degree Celsius (°C) to Degree Fahrenheit (°F).
o
Press continuously for 10 seconds.
44
14.2.6 Special
Setting
mode
1 LCD display area:
2 Cannot enter this special setting mode under the following conditions:
o
Operation
ON.
o
Under [Real/ON/OFF] time setting mode.
3 To enter zone 1 area:
4 To enter zone 2 area: (Press
continuously for T ≥ 5 secs)
Special setting display area
(highlighted in color)
Function
No.
Options
(If any)
Enter Zone1
[range (1~49)]
Normal display
mode
Once T ≥ 5secs
Enter Zone2
[range (50~99)]
Enter Zone1
Normal display
mode
Click on the first or last page to see other CS-BE20TKD / CU-BE20TKD service manuals if exist.