Extraction vacuum pump can not start the fault analysis and processing

[Asia Pump Network News] process gas from the recovery tower reflux tank into the device. The function of this equipment is to discharge the leaked air, nitrogen and the process steam (material and water vapor) saturated in the air and nitrogen out of the reflux tank and keep the vacuum of the process system. The process steam can be evacuated at the outlet of the vacuum pump collect. Vacuum pump vacuum pump failure to start the failure analysis and treatment 2 Fault extraction vacuum pump P0374 can not start up. When the on-site instrument conditions are met, the process found that the vacuum pump still can not start normally. 3 Analysis of the reasons for the extraction of vacuum pump P0374 interlock logic diagram is as follows: Of which: TS-1 ---------- vacuum pump temperature high interlock TS-2 ---------- high temperature interlock motor YAP0374 ----- Motor overload interlock PSC3610 ----- Pump inlet valve status STOP --------- Stop the vacuum pump START ------- Start the vacuum pump YLP0374 ---- Vacuum pump running status YKP0374 ---- interlock start vacuum pump SOV-1 ------- vacuum pump temperature control valve bypass cooling off YBP0374 ---- interlock stop vacuum pump PSV3610 ---- pump inlet valve to open the vacuum pump Start conditions: pump start TS-1 (Temperature Switch) / YAP0374 (Overload Protection) / PSC3610 (inlet valve closed) contacts are closed (green) and YBP0374 (stop pump contact) is closed YKP0374 (pump contact) is closed (reddish to green and then red) after pressing Button for 1 second, P0374 pump starts and YLP0374 (pump status indicator) is closed if the electrical conditions are normal (Red to green), PSV3610 (Solenoid Valve) energized after 30 minutes for normal indication. The above pump conditions are met, the pump still can not start normally. After the communication with the craft staff found that the last time the process operator to stop the pump is in the control room under normal pump operation to stop the pump operation. After checking the information and interlocking configuration information, it is found that if the vacuum pump has been manually stopped in the control room, it is necessary to call up the detail screen of the switch whose bit number is "STOP" on the operation screen and set the STOP status to ON Call out the breakdown of the project, press the up and down arrows, there are two states to choose ON / OFF). 4 Remedy Proceed to the second processing of the cause analysis and call up the detail screen of the switch whose bit number is "STOP" on the operation screen, and set the STOP status to ON (call up the STOP detail and press the up and down arrows. There are two status Select ON / OFF), the vacuum pump starts normally. Other instructions: If this instrument and then found a similar fault phenomenon, the instrument on duty should refer to the above method. The following conditions must be checked when invalidating according to the above method: 1. If pump P0374 is to be started remotely in the control room, the position of on-site start switch (start / auto / stop) must be in automatic position, otherwise it can not be started remotely in the control room Pump. 2, if all of the above conditions are still unable to start, the instrument part of the problem, notify the process staff to check the electrical, equipment and so on. (Editor: Li Juan QQ:) Recommended reading: 2017 Exhibition Information 2016 Yiwu Fair

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