LG Multi V CRUN Series

158 Outdoor Unit
Operation detail
■ Compressor Control
(1) Compressor operation method
- In order to stop the compressor, decrease the frequency to 30Hz, and turn off.
- Rising speed of frequency : 1Hz/2seconds
Decreasing speed of frequency: 1Hz/1second.
(2) Compressor Operation Step
(3) Starting Method
According to table beside, change the step to base step(Step_base) for 3.5 minutes.
• Step 1 = 1 (30Hz)
• Step 2 = determined by pressure control
• Step 2 = (Step 1 + Step_base)/2
• Step 3 = (Step 2 + Step_base)/2
• Step 4 = (Step 3 + Step_base)/2
• Step 5 = (Step 4 + Step_base)/2
(4) Pressure Control(Stage B)
- In heating operation, ICOF is controlled for high pressure to reach base pressure(21bar).
High_Pressure > 21bar → Step down
High_Pressure < 19 bar → Step up
- In cooling operation, ICOF is controlled for low pressure to reach base pressure(6.6bar)
Low_Pressure < 6.1bar → Step down
Low_Pressure > 7.1bar → Step up
(5) Restart of Compressor
- In order to maintain equilibrium of pressure and prevention motor wire from generation of heat, after the
compressor is turned off, for 3 minutes it should not be turned on.
Step ICOF Step ICOF
0 0 16 60
1301762
2321864
3341966
4362068
5382170
6402275
7422380
8442485
9462590
10 48 26 95
11 50 27 100
12 52 28 105
13 54 29 110
14 56 30 115
15 58 31 120
- Maximum frequency for ICOFis limitted by the temperature of outdoor air.
*ICOF : Inverter Compressor Operation Frequency
Consumed time
Comp. Step
1 min
Step 1
0.5min
Step 2
0.5 min
Step 3
0.5 min
Step 4
0.5 min
Step 5
0.5 min
Step_base
3.1 CRUN458S0
3. Operation detail