LG Multi V CRUN Series

164 Outdoor Unit
Operation detail
(4) starting Method
- Total 7 minutes consumed for starting operation
- After 7 minutes, the compressor operates at target frequency step
• Stage A = Step 6(40Hz + Off)
• Stage B = determined by pressure
control
• Stage C = (Stage B + Step_base)/2
• Stage D = (Stage C + Step_base)/2
• Stage E = (Stage D + Step_base)/2
Consumed time
Comp. Stage
1 min
Stage A
2 min
Stage B
1 min
Stage C
1 min
Stage D
1 min
Stage E
1 min
Step_base
CSC
ON
1234567
min
40Hz
40Hz
Initial Starting
Mode
60Hz
70Hz
Frequency down for constant speed compressor turn on
Step_baseStage EStage DStage CStage A Stage B
(5) Pressure Control(Stage B)
- In heating operation, ICOF is controlled for high pressure to reach base pressure(21bar).
- After stage A finished, ICOF is stepped up by 1.
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)
- After stage A finished, ICOF is stepped up by 1.
Low_Pressure < 6.1bar Step down
Low_Pressure > 7.1bar Step up
(6) Compressor control at power input
For 3 minutes after main power input, crank case heater is turned on, though ON signal is inputted from
indoor unit, compressor is not operated for 3 minutes.
After 3 minutes later from main power input, the compressor can be operated in case that following
conditions are satisfied.
i) If outdoor air temperature > 5°C, then crank case heater is OFF and the compressor can be started
ii) If outdoor air temperature < 5°C, then crank case heater is ON continuously and 5 hours later the
compressor can be started.
For the operation of , though forced operation signal from indoor unit is in, those are all ignored and
displays ‘crank case heater operation’ at indoor unit.