LG ARNU Series, Service Manual

Page: 99 / 226

Service Manual 99
Function
3.2 Discharge temperature control
3.3 Inverter protection control
System stop Current 23A
item control
Inv compressor 5Hz down/3 sec Current 20A
Inv. compressor no frequency up
Current 17A
Inv. Compressor normal control Current 17A
System stop DC Peak
System stop High pressure switch
System stop Low voltage
<
<
<
<
Off indoor unit LEV 130 (Only
Heating mode)
Ending : Td
≤
65
°
C
Td
≥
70
°
C
Do not increase Hz
Ending :Td
≤
95
°
C
Td
≥
102
°
C
1~5% down / 30 sec.
After operating in 20+20Hz for 60sec.
System off/restart after 3min.
ending: Td <101
°
C for 30sec.
Td
≥
106
°
C
5% open
(every control time)
Td
≥
110
°
C
(low press.
≤
529kPa)
Liquid gathering
operation(heating)
ending : Td < 103
°
C
Td
≥
108
°
C
Control LEV to set
“Subcooler out temp. – evaporating
temp = 8
°
C”(only heating mode &
Main LEV
≥
800pls)
+10pulse / 10sec.
(only cooling mode)
Subcooler LEV
Td > 85
°
C
Adjust target suction
superheat 1.5
°
C, minimum
suction superheat
0.5
°
C (only heating mode)
Td > 95
°
C
5% open
(every control time)
Td
≥
105
°
C
(low press. > 529kPa)
Decrease Indoor superheat
Ending : Td < 95
°
C
Td
≥
100
°
C
Main LEV Indoor Unit
System Stop
Td
≥
115
°
C
Comp Discharge Temp.