Panasonic CS-E7NKDW / CS-E9NKDW / CS-E12NKDW / CS-E15NKDW / CS-E18NKDW / CU-E7NKD / CU-E9NKD / CU-E12NKD / CU-E15NKD / CU-E18NKD Service Manual ▷ View online
69
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.
15.2 Remote Control Button
15.2.1 SET
BUTTON
To check remote control transmission code and store the transmission code to EEPROM
o
Press “SET” button continuously for 10 seconds by using pointer.
o
Press “TIMER SET” button until a “beep” sound is heard as confirmation of transmission code changed.
15.2.2 RESET
(RC)
To clear and restore the remote control setting to factory default.
o
Press once to clear the memory
15.2.3 RESET
(AC)
To restore the unit’s setting to factory default
o
Press once to restore the unit’s setting.
15.2.4 TIMER
▲
To change indoor unit indicator’s LED intensity
o
Press continuously for 5 seconds.
15.2.5 TIMER
▼
To change remote control display from Degree Celsius (°C) to Degree Fahrenheit (°F)
o
Press continuously for 10 seconds.
70
16. Troubleshooting
Guide
16.1 Refrigeration Cycle System
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the refrigeration
cycle depends on various conditions, the standard values for them
are shown in the table on the right.
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the refrigeration
cycle depends on various conditions, the standard values for them
are shown in the table on the right.
Normal Pressure and Outlet Air Temperature (Standard)
Gas pressure
Mpa
(kg/cm
2
G)
Outlet air
temperature
(°C)
Cooling Mode
0.9 ~ 1.2 (9 ~ 12)
12 ~ 16
Heating Mode 2.3 ~ 2.9 (23 ~ 29)
36 ~ 45
*Condition: • Indoor fan speed = High
• Outdoor temperature 35°C at the cooling
mode and 7°C at the heating mode
• Compressor operates at rated frequency
• Compressor operates at rated frequency
71
16.1.1 Relationship between the condition of the air conditioner and pressure and
electric current
Cooling Mode
Heating Mode
Condition of the
air conditioner
Low Pressure
High Pressure
Electric current
during operation
Low Pressure
High Pressure
Electric current
during operation
Insufficient refrigerant
(gas leakage)
Ô
Ô
Ô
Ô
Ô
Ô
Clogged capillary tube or
Strainer
Ô
Ô
Ô
Ò
Ò
Ò
Short circuit in the indoor unit
Ô
Ô
Ô
Ò
Ò
Ò
Heat radiation deficiency
of the outdoor unit
Ò
Ò
Ò
Ô
Ô
Ô
Inefficient compression
Ò
Ô
Ô
Ò
Ô
Ô
• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
72
16.2 Breakdown Self Diagnosis Function
16.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code)
Once abnormality has occurred during operation,
the unit will stop its operation, and Timer LED
blinks.
blinks.
Although Timer LED goes off when power supply
is turned off, if the unit is operated under a
breakdown condition, the LED will light up again.
breakdown condition, the LED will light up again.
In operation after breakdown repair, the Timer
LED will no more blink. The last error code
(abnormality) will be stored in IC memory.
(abnormality) will be stored in IC memory.
16.2.2 To Make a Diagnosis
1 Timer LED start to blink and the unit
automatically stops the operation.
2 Press the CHECK button on the remote
controller continuously for 5 seconds.
3 “- -” will be displayed on the remote controller
display.
Note: Display only for “- -”. (No transmitting
signal, no receiving sound and no Power LED
blinking.)
Note: Display only for “- -”. (No transmitting
signal, no receiving sound and no Power LED
blinking.)
4 Press the “TIMER” ▲ or ▼ button on the
remote controller. The code “H00” (no
abnormality) will be displayed and signal will
be transmitted to the main unit.
abnormality) will be displayed and signal will
be transmitted to the main unit.
5 Every press of the button (up or down) will
increase abnormality numbers and transmit
abnormality code signal to the main unit.
abnormality code signal to the main unit.
6 When the latest abnormality code on the main
unit and code transmitted from the remote
controller are matched, power LED will light
up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If
no codes are matched, power LED will light up
for 0.5 seconds and no sound will be heard.
controller are matched, power LED will light
up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If
no codes are matched, power LED will light up
for 0.5 seconds and no sound will be heard.
7 The breakdown diagnosis mode will be
canceled unless pressing the CHECK button
continuously for 5 seconds or operating the
unit for 30 seconds.
continuously for 5 seconds or operating the
unit for 30 seconds.
8 The LED will be off if the unit is turned off or
the RESET button on the main unit is pressed.
16.2.3 To Display Memorized Error
(Protective Operation) status
1 Turn power on.
2 Press the CHECK button on the remote
2 Press the CHECK button on the remote
controller continuously for 5 seconds.
3 “- -” will be displayed on the remote controller
display.
Note: Display only for “- -”. (No transmitting
signal, no receiving sound and no Power LED
blinking.)
Note: Display only for “- -”. (No transmitting
signal, no receiving sound and no Power LED
blinking.)
4 Press the “TIMER” ▲ or ▼ button on the
remote controller. The code “H00” (no
abnormality) will be displayed and signal will
be transmitted to the main unit. The power
LED lights up. If no abnormality is stored in
the memory, three beeps sound will be heard.
abnormality) will be displayed and signal will
be transmitted to the main unit. The power
LED lights up. If no abnormality is stored in
the memory, three beeps sound will be heard.
5 Every press of the button (up or down) will
increase abnormality numbers and transmit
abnormality code signal to the main unit.
abnormality code signal to the main unit.
6 When the latest abnormality code on the main
unit and code transmitted from the remote
controller are matched, power LED will light
up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If
no codes are matched, power LED will light up
for 0.5 seconds and no sound will be heard.
controller are matched, power LED will light
up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If
no codes are matched, power LED will light up
for 0.5 seconds and no sound will be heard.
7 The breakdown diagnosis mode will be
canceled unless pressing the CHECK button
continuously for 5 seconds or operating the
unit for 30 seconds.
continuously for 5 seconds or operating the
unit for 30 seconds.
8 The same diagnosis can be repeated by
turning power on again.
16.2.4 To Clear Memorized Error
(Protective Operation) status
after Repair
after Repair
1 Turn power on (in standby condition).
2 Press the AUTO button for 5 seconds (A beep
2 Press the AUTO button for 5 seconds (A beep
receiving sound) on the main unit to operate
the unit at Forced Cooling Operation modes.
the unit at Forced Cooling Operation modes.
3 Press the CHECK button on the remote
controller for about 1 second with a pointed
object to transmit signal to main unit. A beep
sound is heard from main unit and the data is
cleared.
object to transmit signal to main unit. A beep
sound is heard from main unit and the data is
cleared.
16.2.5 Temporary Operation (Depending
On Breakdown Status)
1 Press the AUTO button (A beep receiving
sound) on the main unit to operate the unit.
(Remote control will become possible.)
(Remote control will become possible.)
2 The unit can temporarily be used until
repaired.
Click on the first or last page to see other CS-E7NKDW / CS-E9NKDW / CS-E12NKDW / CS-E15NKDW / CS-E18NKDW / CU-E7NKD / CU-E9NKD / CU-E12NKD / CU-E15NKD / CU-E18NKD service manuals if exist.