Panasonic cs-mke18nku User Manual

1HR.
TIMER
button

ON/OFF
operation
button

ACL
(Reset)
button

QUIET
button

< Clock display >

Test run mode

Self-diagnostics mode

After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair.

High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge 
(charging voltage DC 310V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be 
careful not to touch any electrified parts before the controller LED (red) turns OFF.

If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at 
least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller.

1: If the operation lamp blinks every 0.5 seconds immediately when the 

power is turned ON, there is an external ROM (OTP data) failure on the 
indoor circuit board, or a ROM socket insertion problem, or the ROM 
has not been installed.

2: The failure mode is stored in memory even when the power is not ON. 

Follow the procedure below to perform diagnostics.

Follow the procedure below to perform detailed trouble diagnostics.

Step 1: Press and hold the remote controller QUIET button and 1 HR 

TIMER button. At the same time, press the ACL (reset) button. Use 
a pointed object such as the tip of a pen to press the ACL button.

 

When this has been done, "oP-1" (test run) appears, blinking, in 

the remote controller clock display area.

Step 2: Next, press the 1 HR TIMER button once to change the display 

from "oP-1" to "oP-3" (self-diagnostics). (The display continues to 
blink.)

Step 3: Finally press the ON/OFF button to engage self-diagnostics mode. 

•  The self-diagnostics function utilizes the 3 indicator lamps on the main 

unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to 
report the existence of sensor trouble or a protective operation. (The 
lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.) 
Self-diagnostics is completed when the buzzer sounds 3 short beeps.

•  A maximum of 3 self-diagnostics reports are displayed, for 5 seconds 

each, beginning with the most recent report. Following this display the 
lamps turn OFF. In order to view the self-diagnostics results again, press 
the ON/OFF button again.

•  The 3 lamps remain OFF if no trouble has occurred.

<IMPORTANT> After self-diagnostics is completed, be sure to press the 

ACL (reset) button to return to normal mode. The air 
conditioner will not operate if this is not done.

After turning on power to the air conditioner, use the remote controller and 
follow the steps below to execute self-diagnostics.