LG ARNU Series - Discharge Temperature Control; Inverter Protection Control

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Function
3.2 Discharge temperature control
■ Outdoor unit control
■ Indoor unit control
3.3 Inverter protection control
Emergency
SH control
System stop
103˚C < Tdis ≤115˚C
Tdis >115 ˚C
Temperature range
EEV
Keep current control
98 ˚C<Tdis ≤103˚C
SH control
Tdis ≤98 ˚C
Frequency down +
const. Comp off
Liquid injection on
No frequency up
System stop
105˚C<Tdis ≤112˚C
Tdis >115˚C
Temperature range
Compressor
On
Liquid injection
98 ˚C<Tdis ≤103˚C
Keep
state
Pressure control
Tdis ≤98˚C
Off
Max. limit
350 pulse
Subcooling EEV
If liquid is on,
Max. limit
350 pulse
Max. limit
150 pulse
Pressure control
Tdis >95˚C
Off
10 pulse open /10sec
System stopCurrent 20A
item control
Inv compressor 5Hz down/10 secCurrent 20A
Inv. compressor no frequency up
Current 18A
Inv. Compressor normal controlCurrent 18A
System stopDC Peak
System stopHigh pressure switch
System stopLow voltage
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