Outdoor Units; Basic Control; Normal Operation; Compressor Control - LG ATNH126ELFC Service Manual

Outdoor Units

Outdoor Units

1. Basic control

1.1 Normal operation

Compressor
Fan
Target Suction super heat and
EEV
Discharge Temp. Control
4 way valve

1.2 Compressor control

(1) Step Control : COMP Operation Step will be determined on the load according to the difference
between indoor Temp.and outdoor Temp.
- The general load
- Below the specified load
- The Hysterisis
Capacity(Btu/h)
B COMP
a
48k
b
72k
c
100k
138 Synchro Air Conditioner
(AUUH-)
Cooling mode
Step Control
Phase control
Off
COMP
MODE
A COMP
Cooling
a
Heating
Cooling
b+b
Heating
Cooling
c
Heating
Heating mode
Step Control
Phase control
Target Suction super heat and
Discharge Temp. Control
On
Operating in Standard Step
Operating in lower one step than standard step.
Operating in a previous step .
STEP1
B COMP
Stop state
Stop
After 30sec, Off
After 60sec, Full Opne
After 30sec, Off(Heating)
STEP2 STEP3
A COMP B+A COMP