When you're not using for a long time, if done when testing, dealing with all electrical and water supply, gas supply system system check. Prevent boot failure
When the long-term need, if re-do the test, to deal with all the electrical and water supply, gas supply system to make a specific system check. Prevent the occurrence of the line after power failure
Long term use, if re doing the test, to deal with all the electrical and water supply, gas supply system to do a specific system to check. To prevent the occurrence of line failure after starting