Electric Characteristics - LG universal system air conditioner Service Manual

6. Electric Characteristics

Model Type
AUUW126B
(UU12W UEB)
AUUW186B
(UU18W UEB)
AUUW246B
(UU24W UEB)
AUUW306B
inverter
(UU30W UEB)
AUUW366B
(UU36W UEB)
AUUW4860
(UU48W UYB)
AUUW6060
(UU60W UYB)
Notes :
1. Voltage range
Voltage supplied to the unit terminals should be within the mini-
mum and maximum range
2. Maximum allowable voltage unbalance between phase is 2 %
3. MCA / MOP
MCA = (1.25 x Load1) + Load2 + Load3
MOP = (2.25 x Load1) + Load2 + Load3
- Load1 : Rated running current of largest motor
(compressor or other motor)
- Load2 : sum of current for all other motors
- Load3 : any other load rated 1.0A or more
4. Select wire spec. based on the MCA
5. Recommended circuit breaker is ELCB (Earth Leakage circuit
breaker)
6. MSC & RLA are measured as the compressor only test condi-
tion.
7. MSC values
10/28 : MSC of (inv. comp.) / (const. comp.)
Unit
Hz Voltage Voltage range
Min. : 198
220~240
50
Max. :264
Power Compressor
MCA MOP MSC
8.13 14.6 10
13.2 23.9 10
17.1 30.8 10/25
24.6 44.3 10/28
30.3 53.4 10/63
36.0 63.3 10/28/28 7.0/8.2/8.2
46.2 81.7 10/28/63 7.0/8.2/14.0
8. RLA is measured during each individual compressor test condi-
tion.
Ex) 7.0/8.2 : RLA of (inv. comp.) / (const. comp.)
9. OFM is measured as the outdoor unit test condition
(Example) Selection of proper circuit breaker
Model : AUUW126B
- Rated running current : 6.5 A (refer to spec. sheet)
MCA = (1.25 x Load1) + Load2 + Load3
= (1.25 x 6.5) + 0 + 0 = 8.13 A
MOP = (2.25 x Load1) + Load2 + Load3
= (2.25 x 6.5) + 0 + 0 = 14.6 A
Finally select circuit breaker 15A(Min. circuit breaker is 15A)
MCA : Minimum Circuit Amperes (A)
MOP : Maximum rating over current protective device
MSC : Maximum Starting Current
RLA : Rated Load Amperes (A)
OFM : Outdoor Fan Motor
kW : Fan Motor rated output (kW)
FLA : Full Load Amperes (A)
MPS Inverter SINGLE A
OFM
RLA kW FLA
7.0 0.12 0.68
7.0 0.12 0.68
7.0/6.0 0.14 0.73
7.0/8.2 0.16 0.92
7.0/14.0 0.24 1.46
0.4 1.87
0.4 1.87
Service Manual 89