Function Introduction Of Central Controller - Haier Ycz-A004 Operation & Installation Manual

Function introduction of central controller

1. YCZ-A004 can control MRV, single split and Supermatch. 256 indoor units can be controlled when used with MRV and
128 indoor units when with single split & supermatch.
When controlling MRV, YCZ-A004 should be used together with IGU05. One IGU05 is connected with one system of
At this situation, please set System Settings-Local-Type Selection-MRV.
When controlling single split units, every indoor unit needs to install one YCJ-A002, and all YCJ-A002s are connected
to YCZ-A004 hand by hand.
At this situation, please set System Settings-Local-Type Selection-Single Machine.
When controlling supermatch(or multi), every indoor unit needs to install one YCJ-A002, and all YCJ-A002s are
connected to YCZ-A004 hand by hand.
At this situation, please set System Settings-LOCAL-Type Selection-Multi.
2. Main functions of central controller
Monitoring and controlling indoor running state such as ON/OFF, Mode, Fan, Set temp. and error code.
Zone setting, editing and deleting.
Realizing ON/OFF, mode, fan, temperature setting for single/zone/all indoor unit(s).
Checking indoor unit detailed information such as real temperature, coil temperature, error code.
For MRV, three kinds of controlling mode: LIFO, Central & Force can be selected for indoor units; while only Force &
LIFO mode can be selected for single split unit.
LIFO: the indoor unit will execute the last order send by central controller, wired controller or remote controller. For
controller, the indoor unit will execute high fan.
Central: central controller enjoys all functions while wired &remote controller can only control ON/OFF of indoor units.
Force: central controller enjoys all functions while wired & remote controller cannot control indoor units.
Weekly timer setting. Weekly timer for one or some or all units can be set and can run in cycle.