12-5
CONTROL SYSTEM
SM LEXDCI 1-E.1 GB
12.1.9.2 EEV Control for DCI 72 / 72 Z / 80
The target EEV value is the sum of open loop value (OL) and a result of the accumulative
correction values (CV).
CV
OL
EEV
EEV
EEV
The EEV intial value(OL) is defined as follow:
EEV
OL
=
EEVBaseOp EEVOpenLoopCpc EEVTubeCompnst
Basic EEV open loop
Open Loop correction
EEV tube Length
compensation
Mode
72/80
72/80
72/80
COOL
220
25
0
HEAT
170
30
0
*
For DCI72Z
The initial
EEV
OL
is defined in accordance to the compressor frequency
EEV
CV
is a correction value for the EEV opening that is based on the compressor temperature,
During the first 6 minutes after SB the correction is not calculated. After that the correction value is
updated every
30
seconds.
12.1.10
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.
12.1.11 Ioniser
Control
Ioniser is on when unit is on ,AND indoor fan is on ,AND Ioniser power switch (on Ioniser) is on.
12.1.12 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.
12.2 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 differencebetween
actual room temperature and user set point temperature.
CONTENTS
