MKS Type T3B Butterfly Valve (with DeviceNet Interface)

Maintenance and troubleshooting

routine maintenance

Routine inspection: No special maintenance requirements, only correct installation and operation are required; Regularly check for cable wear and signs of shell damage; Regularly wipe the surface of the equipment with a damp cloth.

Equipment return: If you need to return the MKS for repair, you need to obtain the ERA number first; The returned equipment must be free of harmful, corrosive, radioactive, or toxic substances.

troubleshooting

General faults:

When the valve is closed, the conductivity does not meet the standard: it may be due to wear or damage of the baffle seal, and the factory needs to be contacted to obtain a seal replacement kit.

25 pin I/O connector interlock missing (22-24 pins): Connect pin 22 to pin 24 or verify external interlock wiring.

Valve not open/closed: Check if the 24V power supply is properly connected to the valve terminal or if the valve is faulty (need to be sent to MKS for repair); Simultaneously confirm the interlocking wiring.

Pressure control failure (report full range/low/zero): Sensor disconnected (reconnect) or pressure gauge not powered (check power supply).

Pressure control oscillation/poor effect: PID mode needs to optimize gain and phase, and the model base mode needs to relearn the pump speed curve; The control offset may be due to high grounding impedance (judged by MKS valve GUI as a debugging or grounding issue); The control difference within a specific pressure range may be due to incorrect intersection point settings (configuring and installing pressure gauges for intersection pressure).

Unable to achieve target pressure: The baffle seal is worn or damaged (replace seal).

Report negative/abnormal pressure: pressure gauge not zeroed (zeroing), no power supply (checking power supply); Pressure gauge full range setting error (configured with correct range), voltage range error.

Pump speed learning failed: The pressure gauge is not connected to the high range (retry after connecting to the high range).

Communication malfunction:

RS-232 communication failure: Check baud rate, data bits, checksum, CR-LF settings, or cable wiring issues.

DeviceNet communication failure: Check MAC address and baud rate settings, or network power supply for normal operation.

Meaning of fault indicator light:

Module status LED: evergreen (normal), flashing green (visual indication), constantly red (non recoverable fault), flashing red (minor fault, such as interlock not enabled), off (no power supply), alternating red and green (self check).

Network status LED: evergreen (communication link normal, online and connection established), flashing green (online but no connection established), constantly red (severe link failure, such as repeated MAC address or bus shutdown), flashing red (connection timeout), alternating red and green (initialization), off (not online, such as incomplete repeated MAC check or no power supply); When using a single device network, it is normal to keep it off until there is no connection.

Fault type:

Minor faults: MAC ID or baud rate switch changed during operation, safety interlock opened (only T3P gas interlock), controller error reported through abnormal status bit (refer to supplementary manual), equipment remains in operation.

Serious malfunction: During self inspection, EEPROM hardware or RAM memory issues were detected, the module status LED is constantly red, and the device has entered a serious malfunction state, unable to respond to network services. MKS needs to be contacted.