Carrier 42QZA009DS-1 Service Manual page 41

8.4.8.4 Timer off and remote controller off signals have the priority compared with sleep function.
8.4.9 Auto-Restart function
The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In
case of a sudden power failure, the module memorizes the setting conditions before the power failure. The
unit will resume the previous operation setting (not including swing function) automatically after 3 minutes
when power returns.
If the memorization condition is forced cooling mode, the unit will run in cooling mode for 30 minutes and
turn to auto mode as 24℃ setting temp.
If AC is off before power off and AC is required to start up now, the compressor will have 1 minute delay
when power on. Other conditions, the compressor will have 3 minutes delay when restarts.
8.4.10 Drain pump control (For A5 Duct & Cassette)
Adopt the water-level switch to control the action of drain pump.
Main action under different condition :( every 5 seconds the system will check the water level one time)
1. When the A/C operates with cooling (including auto cooling) and forced cooling mode or dry mode, the
pump will start running immediately and continuously, till stop cooling or dry or no capacity demand.
2. Once the water level increase and up to the control point, LED will alarm and the drain pump open and
continue checking the water level. If the water level falls down below the control point (drain pump delay
close 1 minute) and operate with the last mode. Otherwise the entire system stop operating (including the
pump) and LED remain alarming after 3 minutes,
8.4.11 Follow me (optional)
1) If the indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote
controller, the buzzer will emit a sound and this indicates the follow me function is initiated. But when the
indoor PCB receives signal which sent from remote controller every 3 minutes, the buzzer will not
respond. When the unit is running with follow-me function, the PCB will control the unit according to the
temperature from follow-me signal, and the temperature collection function of room temperature sensor
will be shielded, and the error detective function of room temperature sensor will be still invalid.
2) When the follow-me function is available, the PCB will not respond according to the setting temperature
from follow-me signal every 3 minutes.
3) The PCB will take action to the mode change information from remote controller signal, and the
follow-me function will be turned off. (if the wired remote controller does not initiate follow me function).
When the unit is running with follow-me function, if the PCB doesn't receive any signal from remote
4)
controller for 7 minutes or pressing FOLLOW ME button again, the follow-me function will be turned off
automatically, and the temperature collection function of room temperature sensor will be available, the
PCB will control the unit according to the room temperature detected from its own room temperature
sensor and setting temperature.
5) When the indoor PCB receives the follow-me signal from wired remote controller, the control is the
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