LG AUUH488C - Protection Control; Discharge Temperature Control

Service Manual 145
Outdoor Units
3. Protection control
3.1 Discharge Temperature control
3.1.1 The outline of Discharge Temperature control
This function prevents the damage of COMP according to EEV Comp On/Off control.
- The EEV Comp On/Off control is predicted the Temp. of COMP according to the Temperature of the
Discharge pipe.
3.1.2 The particular contents of Discharge Temperature control
1) The Discharge Temp.of the outdoor_unit_COMP(COMP TOTAL DISCHARGE SENSOR) ≥ 95°C
: LEV OPEN (30PULSE/MIN )
2) The Discharge Temp.of the outdoor_unit_COMP(COMP TOTAL DISCHARGE SENSOR) ≥ 100°C
: LEV OPEN (50PULSE/MIN )
3) The Discharge Temp.of the outdoor_unit_COMP(COMP TOTAL DISCHARGE SENSOR) < 95°C
:LEV control according to regular control logic
4) The Discharge Temp.of the outdoor_unit_COMP(COMP TOTAL DISCHARGE SENSOR) ≥ 115°C
: Stop the COMP at once and remains stopped for 3 minutes.
: sign the Error code (Error Mode 33).
5) System will stop if this situation occurs 10 times in 1 hour and error code will be generated.
❈ Control Temp. and LEV Pulse can be different for each model.
COMP OFF
LEV OPEN (50PULSE/MIN )
115°C
100°C
95°C
COMP ON
Discharge pipe Temperature
LEV OPEN (30PULSE/MIN )