Electra WNG 50 DCI Service Manual page 62

CONTROL SYSTEM
12.4 Indoor Unit Control
12.4.1 Indoor Fan Control
10 Indoor fan speeds are determined for each model. 5 speeds for each mode cool/dry/fan
or heat.
When user sets the indoor fan speed to a fixed speed (Low/ Medium/ High), unit will operate
constantly at set speed.
When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual
speed is set according to the cool/heat load.
12.4.1.1 Turbo Speed
The Turbo speed is activated during the first 30 minutes of unit operation when auto fan
speed is selected and under the following conditions:
Difference between set point and actual room temperature is higher than 3 degrees.
Room temperature is higher than 22°C for cooling or less than 25°C for heating.
12.4.2 Cooling Mode
NLOAD is calculated according to the difference between actual room temperature and user
set point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate according to the selected
speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
12.4.3 Heating Mode
NLOAD is calculated according to the difference between actual room temperature and user
set point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate according to the selected
speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
12.4.3.1 Temperature Compensation
In wall mounted, ducted, and cassette models, 3 degrees are reduced from the actual
room temperature reading (except when in I-Feel mode), to compensate for temperature
difference between high and low areas in the room.
The temperature compensation can be enabled/disabled by shortening of jumper J2 on the
indoor unit controller.
Model
Wall mounted
Cassette
Ducted
Floor/Ceiling
12-6
J2 Shorted
Compensation Disabled
Compensation Enabled
Compensation Enabled
Compensation Disabled
Revision Y05-02
CONTENT
J2 Opened
Compensation Enabled
Compensation Disabled
Compensation Disabled
Compensation Enabled
Service Manual - WNG 50_60_80 DCI