LG RCAW Operation & Maintenance Manual page 22

Controls
Protected with
User Code
Main Menu User Setting
Hand/Auto
Target Temp
Mode
Outage Temp
Control Mode
Start Interval
Restart Temp
Expiration
MODBUS
Control Mode
Usage
Hand/Auto
System Clock
MODBUS
Chilled Water
In Temp
Ambient
System Clock
Temp
Exhaust
Control Mode
Temp
Chilled Water Oil Preheating
Out Temp
Status Message User Code
Condensate
Schedule
Temp Program
Comp
Running Hour
Running
Capacity
Amendable Item
Among the menu items, some items are protected from access with authorization code system. The user setting is pro-
tected with user code, and delay setting, system setting, and parameter setting are protected from system code. The
dual authorization code system enables only authorized operators to configure operation settings, and also enable only
service engineers to configure control parameter settings.
The functions of the LEDs are shown in the below table. Through the LED, the operators can identity the status of chiller
control without any manipulation.
22 Chiller Air-cooled Screw
I/O Display
Remote
Control Input
Oil Check
System Input
Comp Contactor
Contact Inputs
Low Temp
Switch Input
Pressure
Switch Input
Mode
Phase
Protect Input
Usage
Chilled Water
Flow Input
Differential
Pressure Input
Compressor
Overload Input
Delay
Fan Contactor
Contact Inputs
Emergency
Switch Input
Alarm
Output
Comp Contactor
Outputs
Comp Loading
Valve Outputs
Protected with
System Code
Alarm Display Delay Setting
Current Alarms Start Interval
Comp Start
Alarm Clear
Delay
Comp Stop
Delay
Oil Preheat
Delay
Fan Control
Feedback
Comp Control
Feedback
Comp Overload
Delay
Differential
Pressure Delay
Fan Shutdown
Delay
Discharge Temp
Delay
Pump Output
Fan Contactor
Outputs
Solenoid Valve
Output
Fig. 10
Protected with Protected with
System Code System Code
System Setting Para. Setting
Chilled Water In
Fan Control
Temp Amending
Transition Temp
Fan Load
Chilled Water Out
Interval
Temp Amending
Cond Ref Out Comp Discharge
Temp Amending Temp Hi Limit
Ambient
Chilled Water Out
Temp Amending
Temp Hi Ovrd
Comp Discharge
Outage Temp
Temp Amending
Comp Running
Restart Temp
Hour Clear
System Code