Carrier Super Inverter Series Service Manual page 39

If the machine switches mode between heating and cooling, the compressor will keep stopping for 15
minutes and then choose mode according to T1-Ts.
If the setting temperature is modified, the machine will choose running function again.
8.4.6 Forced operation function
8.4.6.1 Enter forced operation function:
Press the touch button continually, the AC will run as below sequence:
Forced auto→Forced cooling→Off
When the machine is off, pressing the touch button will carry the machine to forced auto mode, after this, if
pressing the button once again, the machine will turn into forced cooling mode.
In forced cooling mode, pressing touch button will turn off the machine.
8.4.6.2 In forced operation mode, all general protections and remote control are available.
8.4.6.3 Operation rules:
Forced cooling mode:
The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes. the
machine will turn to auto mode as 24℃ setting temperature.
Forced auto mode:
The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature.
8.4.6.4 When there's indoor unit running in forced cooling, it is the master forced cooling unit. Other indoor
units will run at forced cooling mode too and they will be the slave forced cooling units. The slave forced
cooling units can not quit forced cooling mode until the master forced cooling unit quit, and turn to cooling
mode at low speed with 24℃ setting temperature.
7.4.6.5 The slave forced cooling units will not be controlled by other signals.
8.4.7 Timer Function
8.4.7.1 Timing range is 24 hours.
8.4.7.2 Timer on. The machine will turn on automatically when reaching the setting time.
8.4.7.3 Timer off. The machine will turn off automatically when reaching the setting time.
8.4.7.4 Timer on/off. The machine will turn on automatically when reaching the setting "on" time, and then
turn off automatically when reaching the setting "off" time.
8.4.7.5 Timer off/on. The machine will turn off automatically when reaching the setting "off" time, and then
turn on automatically when reaching the setting "on" time.
8.4.7.6 The timer function will not change the AC current operation mode. Suppose AC is off now, it will not
start up firstly after setting the "timer off" function. And when reaching the setting time, the timer LED will be
off and the AC running mode has not been changed.
8.4.7.7 The setting time is relative time.
8