Panasonic CS-Z25YKEA Service Manual page 109

14.13.6 Remote controller screen behaviour when encountering error
1. When CNT communication error or system error is detected on either main or sub unit, remote controller
screen will automatically enter Rotation status screen and screen backlight will blink.
2. The remote controller screen blinking stops when error is cleared during Duty Rotation ON or Duty Rotation
is cancelled.
3. If the Rotation Status screen is not manually exited, the screen will return to Operation screen and remote
controller screen blinking stops after error is solved.
14.13.7 System behaviour during duty rotation
A. Duty rotation mechanism
1. Upon turning Duty Rotation ON from OFF, Main unit will be turned on (becomes running unit). Sub unit will
become the backup unit.
Duty Rotation = ON
2. After rotation interval ends, Main unit will be turned off (becomes backup unit) and Sub unit will be turned on
(becomes running unit) for the next rotation cycle. Role of running and backup unit will rotate between Main
and Sub unit for each new rotation cycle.
B. Unit response when error is encountered during duty rotation
1. When a CNT communication error is detected on the running unit, the running unit will continue its previous
state but backup unit will be turned on with rotation counter cleared (blank).
2. When a CNT communication error is detected on the backup unit, both running unit and backup unit will
continue its previous state with rotation counter cleared.
3. When a system error (indicated by timer LED blinking) is detected on the running unit and the running unit is
turned off, backup unit will be turned on with rotation counter cleared.
4. When a system error detected on the backup unit and backup unit is turned off, rotation counter is cleared.
C. Unit response when error is cleared during duty rotation
1. When CNT communication error detected on the running unit is cleared, the running unit will continue running
and the backup unit will be turned off. Rotation counter will start anew.
2. When CNT communication error detected on the backup unit is cleared, the running unit will continue running
and the backup unit will be turned off. Rotation counter will start anew.
3. When system error detected on the running unit or backup unit is solved, the running unit or backup unit may
not turn ON (Timer LED is still blinking) as the error is still memorised in the indoor unit. To solve this:
Main Unit Sub Unit
Running Backup
109
Main Unit Sub Unit
Running
Backup