Airwell Multi Split DUO 50 DCI, Service Manual

Page: 62 / 151

13-7
CONTROL SYSTEM
SM DLF 1-A.1 GB
13.1.10 RV(Reversing Valve) Control
Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes.
13.1.10.1 Ioniser Control
Ioniser is on when unit is on ,AND indoor fan is on ,AND Ioniser power switch (on grille) is on.
13.1.10.2 Base Heater Control
The base heater will be working only when RV is “ON” according to the following graph:
ON
OFF
OAT
0
2
Base
Heater
When OAT is faulty the base heater will be “ON” continuously in HEAT mode.
13.1.11 Fan Mode
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the difference between
actual room temperature and user set point temperature.
13.1.12 Cool Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by
fuzzy control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
13.1.13 Heat Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by
fuzzy control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
13.1.13.1 Temperature Compensation
In ducted and cassette models, 3 degrees are reduced from room temperature reading (except when
in I-Feel mode), to compensate for temperature difference between high and low areas in the heated
room, and for coil heat radiation on room thermistor.
The temperature compensation can be enabled/disabled by shortening of J2 on the indoor unit
Controller
Model J2 Shorted J2 Opened
Cassette Compensation Enabled Compensation Disabled
Ducted Compensation Enabled Compensation Disabled