LG AH-W096A0, Руководство по обслуживанию

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Only for training and service purposes
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Control logic
1) There can be two error situations for discharge pipe temperature.
a) Sensor is failed (error code for sensor failure will be generated)
b) Abnormal high temperature at discharge pipe (error code for high discharge will be generated)
Both cases unit will stop.
Compressor working
1. If discharge pipe temperature < T1 No limitation on compressor frequency
2. T1°C
≤
discharge pipe temperature < T2°C
→
Compressor frequency stop increasing & Expansion valve up by ß
pulse
T2
≤
discharge pipe temperature < Toff (Hysteresis control)
→
Compressor frequency down by
a
pulse & Expansion
valve up by ß pulse in every 30 second.
If EEV is in the starting control it will follow starting control first.
3. Discharge pipe temperature
≥
Toff then compressor will be OFF and System will stop if this situation occurs 10 times
in 1 hour and error code will be generated also self diagnosis will start.
4. Discharge pipe temperature control
8 5 105
°
C 95
°
C
AHUW166A0
EEV ß‚ pulse Toff T2
°
C
Hz Model
Expansion valve
Set
ß‚ Pulse Up
Set
Stop control
COMP Hz
Toff
°
C
T2
°
C
Hz
Down
OFF
Set
Set
Discharge pipe temp.
Hz
Down
T1
°
C
OFF
Frequency
fixed
Frequency
fixed