LG RCAW Operation & Maintenance Manual page 12

General
Main Menu
Main Menu
System Setting
User Setting
Content
Hand/Auto Mode
Control Mode
Start Interval
Modbus
Date2009/03/03
CHW In Temp
Ambient Temp
Exhaust Temp
The main menu is composed of 4 screen cuts. Moving among them is accomplished by the manipulation of the arrow
keys . The main menu shows configured control parameter of the PLC, temperature inputs, and accumulated com-
pressor running hour and current running capacity
In the below main menu, hand/auto mode is configured to be auto control, control mode is configured to be local control.
These two items are configurable through user setting menu. The auto control represents the operation mode using
scheduling program without key manipulation or remote signal. Contrarily, hand control represents the operation mode
using key manipulation or remote signal.
All temperature readings are displayed on the main menu. The temperature readings include chilled water entering tem-
perature (CHW In Temp), outdoor air temperature (Ambient Temp), compressor exhaust temperature (Exhaust Temp),
chilled water leaving temperature (CHW Out Temp), and condenser refrigerant leaving temperature (Condensate
Temp).
Compressor running hours(Comp Running Hrs) means accumulated running hours of the compressor. This value can
be initialized by operator if needed. For example, if we replace the compressor with new one, the value must be initial-
ized.
The running capacity can be 0%, 25%, 50%, 75%, or 100% according to the actual compressor capacity control.
12 Chiller Air-cooled Screw
Auto Control
Local Control
Complete
Use
13:05:00
+17.9 °C
+16.9 °C
+17.3 °C
Fig. 2
+17.9 °C
CHW Out Temp
+17.2 °C
Condensate Temp
Status Message Closed-down
Comp Running Hrs 2Hr
Running Capacity 0%