2-8 SPECIAL OPERATION
(1) Purpose of the operation
The amount of refrigerant lubricant oil which has been transported to the indoor units
and the connection pipe with the refrigerant will become large as the operation time of compressor increases.
It is necessary to recover the oil back into the outdoor unit for a certain time interval
in order to prevent compressors from damaging due to lack of lubrication oil.
During the oil recovery operation, the status can confirm:
appears on the display - 3 wires WRC and Central remote controller ---
appears on the display
- Simple remote controller ---
.
Others
02-11
< Start condition >
< End condition >
Compressor accumulated operation time since last oil recovery operation exceeds 3 hours
(first time: 1 hour.)
3 minutes have elapsed since the compressor restart and Suction superheat "Suction temperature - Lowpressure
saturaion temperature" 10 F (5 C) at all Outdoor units
Or
6 minutes have elapsed since the start
< Operation >
Compressor
Heat Ex(4WV)
FAN
Heat Ex EEV
SV1,SV2
All compressor operation Stop
Keeps the operation mode
Stops
0 pls
Open
All compressor start
Condensor (OFF)
Start (Target high pressure control)
480pls
Close
All compressor operation Stop
Keeps the operation mode
Stops
0 pls
Open
Preparation process On Oil recovery operatiom
Finishing processActuator
2-8-2 Pre-heat operation
This pre-heat operation protects the start up failure by preventing the refrigerant from soaking into the oil in compressor.
Crankcase heater ON: 30 minutes elapsed since installed compressors stopped
(However, ON when power turned on)
OFF: Installed compressors operation
35W (1 pcs)
70W (2 pcs)
5
3
2 pcs of belt heater installed on the compressor
The crankcase heaters are controlled by the outdoor temperature
< Control condition >
- 2 wires WRC --- Press the Status button on the screen.
- LED indication --- Operation LED (Green) flash slowly.
2-8-1 Oil Recovery operation
To Next Page
Loading...
Need help?
General
