Electra LEX 25 DCI Service Manual page 69

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).
EEV EEV
OL
The EEV intial value(OL) is defined as follow:
EEV = EEVBaseOpenLoop + EEVOpenLoopCpctyCrct + EEVTubeCompnst
OL
Basic EEV open loop
Mode
COOL
HEAT
*
For DCI72Z
The initial EEV is defined in accordance to the compressor frequency
OL
EEV is a correction value for the EEV opening that is based on the compressor temperature,
CV
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:
Base
Heater
OFF
ON
0
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.
SM LEXDCI 1-E.1 GB
¦

EEV
CV
Open Loop correction
72/80
220
170
2
CONTENTS
EEV tube Length
72/80
25
30
OAT
CONTROL SYSTEM
compensation
72/80
0
0
12-5