MTRA-FSP Installation & Operation Manual
Page 8 of 16
00242600-MTRA-FSP_Manual.doc
5
Operation Modes
The MTRA-FSP can be configured to operate in either Empty (Discharge) or Fill
(Charge) mode.
5.1 Empty (Discharge) Mode
Empty (Discharge) mode is used to pump liquid out of a well once it reaches a
preset level. In this mode the relay operates as follows:
•
The pump activates when the liquid reaches the high level probe pump
activation delay period expires.
•
The high level alarm probe will operate the Alarm Relay and also the
Pump Relay (in case the high level probe has failed).
•
The pump will continue to operate until the liquid level drops below the
low level probe and the pump deactivation period expires.
•
A thermal fault will deactivate the pump regardless of liquid level.
•
A Probe Failsafe alarm will deactivate the pump regardless of liquid
level.
Note:
Assumed Probe Faults:
If a High Level, or High Alarm input is activated and the Low Level probe
is deactivated, then the relay assumes the Low Level probe is faulty.
In this situation the pump will continue to run for 60 seconds after the
High Level and High Alarm inputs have deactivated. The Probe Fault
LED will turn ON to indicate an Assumed Probe Fault.
