LG RCWW Operation & Maintenance Manual page 84

6. Commissioning
84
Operational test of Starter panel ~ control panel
• Test before startup
1. Control panel and electric wiring
Turn off the circuit breaker and check for any foreign substance on the control parts and switches. Operate the
switches to check whether it works normally, and the connecting condition of each terminal.
2. Voltage
Compare the voltmeter in the starter panel with the operational voltage displayed in the nameplate of the chiller
checking whether they are identical.
3. Chilled water and cooling water circulation systems
Start the chilled water pump and cooling water pump to check whether the operation status is displayed nor-
mally in the panel.
• Operation test of control unit
1. Check the electric wiring status.
Check the wiring connections to power lines and sensors whether they are correctly done.
Especially, make sure the power line wiring is correctly done.
2. After supplying power, check the status displayed on the panel.
For the initial five seconds after supplying the power, pay a special attention for any indication of short circuit.
In case the following symptoms occur, interrupt the power supply immediately and conduct a check to find out
any problem.
3. Checking displayed values
Check whether the values of each sensor displayed on the panel are normal. If an error message is displayed or
the value of a sensor is abnormal, check the connection of the sensor.
4. Voratile run
Operate the control unit with the main motor power interrupt to check whether it works properly to the operate
signal of the starter panel.
If an error message is displayed, check the relevant area.
• Checking safety devices
Operation test of chilled water and cooling water flow fault
- Shut off the valves attached to the chilled water and cooling water pipes and check whether the switches identify-
ing the flow fault are properly working.