Panasonic CS-Z25YKEA - Page 99

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1.2 Duty Rotation mechanism (Controlled by CN-CNT Signal)
Upon turning Duty Rotaon ON from OFF, Main unit will be always be turned on first (becomes running
unit). Sub unit will become the backup unit. Running and backup unit will rotate based on a rotaon
interval set from remote controller. Aer rotaon interval ends, Main unit will be turned off (becomes
backup unit) and Sub unit will be turned on (becomes running unit) for the next rotaon cycle. Role of
running and backup unit will rotate between Main and Sub unit for each new rotaon cycle.
Figure 1.2 Rotation of running/backup unit roles between Main and Sub unit
1.3 Unit response to error and breakdown (Controlled by CN-CNT Signal)
When error is encountered during duty rotaon, remocon sends signal accordingly to ensure that there
is at least one unit running to maintain air-condioning. This is the general trend of remocon response:
Situaon
encountered by unit
Unit response
Remocon Signal Response
System error
Turned off due to error detecon
Turn on backup unit
Communicaon
error
Resume previous state unl
communicaon restored
Turn on backup unit, and check
communicaon with error unit
Power breakdown
Resume previous state aer
breakdown
None (due to no power)
A. Unit response when error is encountered during duty rotaon
1. When a CNT communicaon error is detected on the running unit, the running unit will
connue its previous state (no signal sent from remocon) but backup unit will be turned on by
remocon with rotaon counter reset.
Main Unit
Sub Unit
Running
Backup
Main Unit
Sub Unit
Running
Backup
Duty Rotation = ON