Issue
SVT Controller will not operate plant under Auto control following Clock replacement.
Environment
SVT 4201 Optimiser Controller.
SVT 4251 Optimiser Controller.
Cause
Replacement Clock installed in SVT Controller is incompatible due to incorrect Clock specification selection.
Resolution
1. Check SVT Optimiser Controller Specification Number.
Specification Number 588-4-201 = SVT 4201
Specification Number 588-4-251 = SVT 4251
2. Check SVT Clock type.
Analogue or Digital ?
SVT 4201 is Analogue Clock version of SVT
Replacement Clock installed should be of Analogue type.
Replacement Analogue Clock Specification Number = 561-9-260
SVT 4251 is Digital Clock version of SVT
Replacement Clock installed should be of Digital type.
Replacement Digital Clock Specification Number = 561-9-261
3. Replace Clock of incorrect type / specification with Clock of correct type / specification.
Please check the catalog for current equipment
