Data Flow Systems TCU800, Installation And Operation Manual

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V i e w i n g a n d T r o u b l e s h o o t i n g A l a r m s
7. Viewing and Troubleshooting Alarms
The TCU’s Alarm LED illuminates if there are any alarms to view. The LED flashes for active alarms and is steady for
inactive (cleared) alarms that have not been viewed from the TCU’s Alarm screen or acknowledged via telemetry.
Following is a list of possible alarms:
• FltSeq – Floats are out of sequence
• Strt – Pump did not start
• Stop – Pump did not stop (this alarm message is displayed in the same location as Strt)
• HiWell – High well condition
• LoWell – Low well condition (this alarm message is displayed in the same location as HiWell)
• DCBias – DC bias (ISO+24V) failed
• ACPwr – AC power loss
• Xducer – Transducer fault
• PhaVol – Phase voltage fault
• PhaSeq – Phase sequence fault (this alarm message is displayed in the same location as PhaVol)
• AuxIn – Auxiliary input alarm
An alarm message flashes if there is an active alarm. If the alarm condition clears while the alarm message is being viewed,
the alarm message stops flashing. Messages for inactive (cleared) alarms are static (non-flashing). These messages are
stored in the TCU’s alarm log until they are viewed. Once a message for an inactive alarm condition has been viewed, it
is cleared from the TCU’s display. The Alarm LED flashes when there are active alarms and is static on (continuously lit)
until all alarms have cleared and all corresponding alarm messages have been viewed. The Alarm LED is cleared when the
alarm screen is exited and there are no active alarms.
When the TCU is used as a remote in conjunction with the telemetry system, active alarms will be displayed both locally
(at the TCU) and via the telemetry system at workstation computers. Note that the TCU’s alarm messages and alarm LED
are not cleared via telemetry; they must be cleared locally.
AC Power Fault
The ACPwr alarm is activated when the TCU determines AC power has been interrupted. The TCU must be on backup
battery power in order for this fault to function when the primary AC power fails.
The information contained in this chapter refers to the TCU’s built-in pump control process. It does not apply to
a TCU with a custom program installed.