Panasonic CZ-RD515U User Manual

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

Step 1: Press and hold the remote controller NIGHT SET 

BACK (NSB) button and 1 HR TIMER button. Then, 
press and hold the ACL (reset) button with a pointed 
object such as the tip of a pen. After 5 seconds, 
release ACL button first, then release NIGHT SET 
BACK (NSB) and 1 HR TIMER buttons, "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.

ON/OFF
operation button

1 HR.TIMER
button

NIGHT SETBACK
button

ACL (Reset)
button

< Clock display >

Test run mode

Self-diagnostics mode