Airwell YBZ214, Service Manual

Page: 43 / 76

CONTROL SYSTEM
Service Manual – YBZ 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.
Unit Model Mode Turbo(Super high) High Medium Low
Cooling 1300 1100 900 700 09
Heating 1300 1140 980 820
Cooling 1350 1150 950 750 12
Heating 1350 1190 1020 850
Cooling 1350 1100 950 800 18
Heating 1400 1200 1050 900
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).
Indoor Fan speed High Medium Low
Cooling >=2 (0,2) <=0
RAT-SPT
Heating <=1 (1,3) >=3
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.