LG ABNH186HLAC, Service Manual

Page: 124 / 175

128 Universal System Air Conditioner
Outdoor Units
Outdoor Units
1.Basic control
1.1 Normal operation
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
→
Operating in Standard Step
- Below the specified load
→
Operating in lower one step than standard step.
- The Hysterisis
→
Operating in a previous step .
Cooling mode Heating mode Stop state
Compressor
Fan Phase control Phase control After 30sec, Off
EEV
4 way valve Off On After 30sec, Off(Heating_
On/Off (1 Comp.)
Step Control (2 Comp.)
On/Off (1 Comp.)
Step Control (2 Comp.)
Stop
Target Suction super heat and
Discharge Temp. Control
Target Suction super heat and
Discharge Temp. Control
After 60sec, Full Opne
Capacity(Btu/h) MODE
STEP1 STEP2 STEP3
B COMP A COMP B+A COMP
12k
Cooling O
Heating O
18k
Cooling O
Heating O
24k
Cooling O
Heating O
30k
Cooling O O
Heating O O
36k
Cooling O O
Heating O O
60k
Cooling O
Heating O
❈
Comp.Capacity Definition
1)Comp. B: 50% COMP
2)Comp. A: 50% COMP , Comp.A+B :100% COMP