Fan Mode; Cool Mode - Electra DELTA 22 Service Manual

CONTROL SYSTEM
11.7 EEV (electronic Expansion valve) Control
EEV opening is defined as EEV = EEV
•
EEV is the initial EEV opening as a function of the compressor frequency, operation
OL
mode, unit model and capacity.
•
EEV is a correction value for the EEV opening that is based on the compressor
CV
temperature.
•
During the first 10 minutes of compressor operation EEV
•
Once the first 10 minutes are over, the correction value is calculated as follow: EEV
EEV (n-1) + EEV
CV
•
EEV is the correction based on the compressor temperature. A target compressor
CTT
temperature is set depending on frequency and outdoor air temperature, and the actual
compressor temperature is compared to the target temperature to set the required
correction to the EEV opening.
11.8 Reversing Valve (RV) Control
Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes.
11.9 Ionizer Control
Ionizer is on when unit is on AND indoor fan is on AND Ionizer power switch (on Ionizer) is
on
.
11.10 Electro Static Filter (ESF) Control
ESF is on when ESF switch is on, Safety switch is pressed, unit is on, AND indoor fan is on.
11.11 Base Heater Control
When OAT is connected, Base Heater will be on when unit is in heating and OAT<2
When OAT is disconnected, Base Heater will be on when unit is in heating.
11.12

Fan 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 and user set point temperature.
11.13

Cool 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 fan in selected speed.
In Auto Fan user setting, fan speed will be adjusted automatically according to the
calculated NLOAD.
11-4
OL
CTT
CONTENT
+ EEV
CV
= 0.
CV
(n) =
CV
0
C.
SM DUO38 1-E.1 GB