2
③For VRF, three kinds of controlling mode: Last in first out, Central & Lock can be selected
for indoor units.
Last in first out: the indoor unit will execute the last order send by central controller, wired
controller or remote controller. For example, if firstly sending low fan speed order by
central controller and then sending high speed fan order by wired controller, the indoor
unit will execute high fan speed.
Central: central controller enjoys all functions while wired &remote controller can only
control ON/OFF of indoor units.
Lock: central controller enjoys all functions while wired & remote controller cannot control
indoor units.
④Receiving outer signal input: when receiving outer fire alarm signal, central controller will
turn all indoor units off. Note: if no outer signal input, should short circuit the ALARM1 and
ALARM2.
⑤Weekly timer setting. Weekly timer for one or some or all units can be set and can run in
cycle, or set Except Date and ONCE. the “except date” can be set under “WEEK”of the
schedule , and the “once date” can be set at the “ONCE”of the schedule.
⑥ECO (sets maximum and minimum allowable temperature set points) Cool Only/ Heat
Only and DST can be set based on actual requirement.
Function introduction of central controller
