Westinghouse WHU09CTA21S, Service Manual, Page: 53 / 90

NOTE:
Figures in the manual are only simple representation of the control board, it may not comply
with the appearance that you purchased.
2) Control of entrance card connection: after the short circuit of entrance card interface, release
power-on restrictions, the wired controller maintains power-off and the startup & shutdown control is
effective.
(2) Fire protection
1) Access to fire protection: the air conditioner shall be shut down and not blow waste cold or
warm air after the access control signal is disconnected for 3 seconds. In this state, the indoor
unit can’t be started. If the user performs starting operation, the wired controller shall not
respond and displays power-off.
2) Cancellation of fire protection: after the short circuit of fire protection signal, release power-on
restrictions, the wired controller maintains power-off and the startup & shutdown control is
effective.
3.3 Relative priorities of instructions
Access control and fire prevention functions shall not affect each other.
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