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Check And Trou - LG RCWW Operation & Maintenance Manual

Water-cooled screw chiller
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5. CHECK AND TROUBLESHOOTING
!
DANGER
Do not touch the Recharging Unit (the conductor or the terminal joints) while the power is connected.
It can cause major injury from electric shock or even death.
!
WARNING
• Do not operate, check or repair the product unless done by an expert.
It can cause malfunction, injury or electric shock.
• During the installation, establish regulated grounding before connecting the power and when removing, re-
move the grounding cable the last. It can cause electric shock or fire.
• In measurement, use a proper instrument. It can cause injury or electric shock.
• Do not touch the machine with a wet hand. It can cause electric shock.
• During the repair work, make sure all the power supplies connected to the control and operation panel are dis-
connected. It can cause electric shock.
• When there is an electric current passing, do not open the control or driving panel's door or protection cover.
It can cause electric shock.
• In a maintenance work, make sure to discharge electric currents. It can cause injury or electric shock.
• When checking, set the safety interrupter switch to OFF. It can cause electric shock.
• Do not open the 2nd unit of Current Transformer for instrumentation, while the power is in.
You can suffer an electronic shock from high voltage.
• Eliminate any alien material (tools, wires, bolts, or washers) after an installation, check-up or repair work.
It can cause injury, fire and damage.
• If a condenser is used, resupply the power only after discharging the previous, remaining electric currents. (Do
not reconnect within 5 min.) It can cause electric shock, fire, damage or malfunction.
• If a condenser is used, change it with a new one, if the swelling goes beyond the standard.
It can cause electric shock, fire, damage or malfunction.
!
CAUTION
• Do not try to operate the control or operation panel, if you are not acquainted with the details of User's Man-
ual. It can cause injury, fire, malfunction or damage.
• Do not try to do a weld around the cable connected to the main unit. It can cause fire and damage.
• Connect only standard input/output communication cords to the control or operation panel.
It can cause malfunction or damage.
• Use only standard, rated cables. It can cause fire and damage.
• Use only standard components to repair the machine. It can cause fire and damage.
• Install the machine, control and operation panel at a location without flammable material. It can cause fire.
• Be careful not to make the input voltage exceed the range indicated in User's Manual or other related data.
It can cause damage or malfunction.
• Make sure to connect the communication cords to the Control Panel, according to the Circuit Diagram.
It can cause damage or malfunction.
• Do not keep the product in a place susceptible to flooding or humidity. It can cause damage or malfunction.
• Do not use control and operation panel for indoors at outdoors. It can cause damage or malfunction.
• Do not arbitrarily open the Circuit Breaker while the machine is running. It can cause damage or malfunction.
• Use a standard torque to tighten or loosen a bolt or screw. It can cause fire, damage or malfunction.
• Do not arbitrarily change the controller. It can cause fire, damage or malfunction.
5. CHECK AND TROUBLESHOOTING
73

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