Hisense AUD-09HX4SVNL Technical & Service Manual page 106

W I R I N G D I A G
W I R I N G D I A G
1 1 .
1 1 .
（2） Timing sequence description:
● Access control:
1) Control of entrance card disconnection: the air conditioner will be shut down after the access
control signal is disconnected for 30 seconds. In this state, the indoor unit can't start. If the
user performs start operation, the wired controller will not respond and displays power-off status.
2) Control of entrance card connection: after the closed circuit of entrance card interface,
restrictions are released, the wired controller maintains power-off and the startup & shutdown control is
enabled.
● Fire protection
1) Access to fire protection: the air conditioner will be shut down and won't blow air
control signal is disconnected for 30 seconds. In this state, the indoor unit can't be started. If the user
performs start operation, the wired controller shall not respond and displays power-off status.
2) Cancellation of fire protection: after the short circuit of fire protection signal, release power-on
restrictions, the wired controller maintains power-off status and the startup & shutdown control is enabled.
(3) Relative priorities of instructions
Access control and fire prevention functions shall not affect each other.
R A M
R A M
104
power-on
after the access