Check items before running after long term stop
- Check items before startup
1. Control panel and electric wire
Shut down the breaker, check whether there are foreign objects in the control parts, switches, etc., and directly
operate the switches, etc. to check whether they are normally operating and the connectors are working in good
condition.
2. Voltage
Read the voltmeter in the starter panel and check whether the reading is the same as the operation voltage speci-
fied in the name plate of the chiller.
3. Chilled water and cooling water circulation systems
Operate chilled water pump and cooling water pump to check whether their operations are properly displayed on
the panel.
- Control device operation test
1. Check the wiring condition
Check whether the power, sensor, etc. are properly connected.
Especially, power lines need to be inspected in detail.
2. After applying the power, check the display status of the panel.
Be especially careful to see whether there is any sign of short circuit for about 5 seconds after applying the
power. If any of the following symptoms occurs, immediately interrupt the power and check for the problem.
3. Check values displayed on the panel
Check whether each sensor value displayed on the panel is correct. If a problem message is displayed or a sen-
sor value is not normal, check the sensor connection.
4. Non voratile operation
Run while the main motor power is interrupted to check whether the operation signal up to the starter panel
works properly. If a problem message shows up, check the corresponding part.
- Check safety devices
Chilled water and cooling water flow fault rate test.
Close the valves installed on the chilled water and cooling water pipes to check whether the switches for checking
flow fault are working properly.
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7. MAINTENANCE
ENGLISH
Summary of Contents for LCWW
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