Troubleshooting and Test Functions 3
1100 Series WS MWS Reference Manual 75
Valve to Bypass Failed
The injection valve failed to switch to the bypass position.
The switching of the injection valve is monitored by two microswitches on the
valve assembly. The switches detect the successful completion of the valve
movement. If the valve fails to reach the bypass position, or if the microswitch
does not close, the error message is generated.
Probable Causes
• Valve in an intermediate position between the By-and the Main position
• Defective injection valve.
• Defective MTP board.
Suggested Actions
✔ Turn the WPS main power OFF and ON.
✔ Exchange the injection valve.
✔ Exchange the MTP board.
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