CONTROL SYSTEM
Service Manual – YBZE DCI 1-A.1 GB 12-3
12.1.3 Indoor Fan Control
8 Indoor fan speeds are determined for each model. 4 speeds for COOL modes and 4 speeds for
HEAT mode.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In Auto Fan user setting, fan speed will be adjusted automatically according to the difference
between actual room temperature (RAT) and user set point temperature (SPT).
During Auto Fan operating, one speed should keep at least 210sec operating before switching to
other speeds.
In DRY mode, the automatic fan speed is forced to be low.
12.1.3.1 Turbo Speed
In COOL and HEAT mode (not available in AUTO, DRY, FAN mode), press the Turbo button, the
super high fan speed is selected on Remote control and the indoor fan rotates at super high speed.
12.1.4 Outdoor Fan Control
The outdoor fan motor is a 3 speed AC motor and controlled by the relays on outdoor controller.
OFAN speed will be changed according to OAT temperature.
12.1.5 EEV Control
12.1.5.1 EEV homing
When compressor stops or unit is power on, the following is performed immediately:
- All EEV’s are closed 520 steps and then set this opening as 0 step.
- Then All EEVs are opened 480 steps and ready for system staring.
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