Sigma Controls MYRIAD DPC Instruction Manual page 26

26
PUMP ALARMS
(1) Pump fail, after a pump has been 'called' to run a digital input (normally from the auxiliary
contact on the respective motor starter) is 'feedback' to the controller at 1DI and 2DI. If the
controller fails to see this input it assumes the motor starter has failed to energize the starter
and it energizes the 'Pump Failed to Run' alarm. This removes this pump from the sequence
and brings on the next available pump.
(2) Critical alarm, the critical alarm inputs 3DI and 4DI, or normally closed inputs, usually from
the pump motor thermostat. If the controller 'sees' either of these inputs go open, then the
"critical alarm" is brought up on the screen and the respective pump is shut down. The next
pump is brought on.
NOTE: If these inputs are not used they should be 'jumpered'.
(3) Seal leak, both seal leak inputs are connected to a single digital input 3AI. When either of
these are closed the non-critical alarm is activated. The pumps are not shut down.
(4) H.O.A. selectors, are monitored for their position at 1AI and 2AI. If an HOA is not in the
'Auto' position that pump will not be permitted to run.