3D TRASAR
5500 - Installation & Operation Manual
521-OM0108.88
Copyright
2009 Nalco Company
9-10
Technical Help
(630) 305-CHEM
Alarm
Type
Indication
Probable Cause
Corrective Action
Bio-
reporter
Low
Bio-reporter
level below
control threshold
1) Pellet Feeder unable to bring bio-reporter level up
to setpoint in a reasonable time.
2) Excessive Oxidizing Biocide degrading bio-
reporter. Source of Oxidizing Biocide may be makeup,
manual feed, process or other leak, or oversized
biocide pump.
1) Add additional Quick Dose pouch and wait for
mixing. If alarm persists, repeat. Check bio-reporter
level at controller di splay in Information>Diagnostic
Data>Fluorometer Data (Rz).
2) Remove source of excess biocide.
Bio-
reporter
Low
Failsafe
Bio-reporter
level below
control threshold
for an extended
period, and
oxidizing
biocide enters
failsafe mode.
1) Same causes as Bio-reporter Low.
1) Same. Alarm must be cleared at the display.
Bio-Data
Noise
High
Excessive noise
in data
1) Bubbles in flow cell.
2) Bioreporter feed point is too close to TRASAR
5000.
1) Reduce flow rate or remove source of entrained air
(i.e., air-locked pump).
2) Change feed point to a location further
downstream of the intake.
Bio-Data
Noise
High
Failsafe
Excessive noise
in data for an
extended
period, and
oxidizing
biocide has
entered failsafe
mode.
1) Same causes as Bio Data Noise High.
1) Same. Alarm must be cleared at the display.
Slug
Recovery
Failure
After a Slug the
ORP did not
return to pre-slug
values within the
time limit.
1) ORP probe is fouled and needs calibration
2) The system takes a long ti me to dissipate the
Oxidizing biocide fed during the slug.
3) Too much Oxidizing biocide was applied during the
slug.
1) Clean and calibrate ORP probe.
2) In the Slug Feed screen <3D BioControl Recovery
Settings> <Show Advanced Recovery Options>
Increase the time limit.
3)Decrease the oxidizing Biocide applied by
changing the ORP setpoint for the Oxidant slug. If the
slug is applied by timer control, decrease the time for
the Oxidant feed. If TB 960 is the Oxidizing biocide,
decrease the weight of the Biocide applied per feed.
Ox Shock
Failed
The ORP did not
increase the
minimum value
during a slug
1) The Oxidant pump is airlocked or failed to apply the
biocide.
2) The recirculati on time in the tower is long and the
applied Biocide is not seen by the ORP probe within
the time limit.
3) The mi nimum ORP rise setting is too large.
4) The ORP probe is fouled/miscalibrated.
1) Fix pump or feeder.
2) Increase the ORP Rise Limit Time in the <Slug
Oxidizing Biocide> <Slug Feed Settings.>
3) Decrease the min ORP rise <Slug Oxidizing
Biocide> <Slug Feed Settings>
4) Calibrate/clean probe.
Oxidant
Relay
Timeout
Relay has been
activated for
longer than relay
timeout limit.
In 3D Bio-Shock
mode the
BioReporter is
calling for too
frequent
oxidizing
biocide feed
1) Tank empty/Pump lost prime/faulty pump or valve.
2) Relay timeout li mit set too low.
3) Pump rate is too low for demand.
4) The Oxidizing biocide is not being applied.
5) The time limi t between feeds is set too long for the
system.
1) Check tank/pump/valve/feed line. Repair as
needed.
2) Readjust alarm threshold.
3) Increase pump rate.
4) Check the pump/feeder.
5) Decrease the minimum time between feeds.
Bio
Reporter
Relay
Timeout
Relay has been
activated for
longer than relay
timeout limit
1) Tank empty/Pump lost prime/faulty pump or valve.
2) Relay timeout li mit set too low.
3) Pump rate is too low for demand.
1) Check tank/pump/valve/feed line. Repair as
needed.
2) Readjust alarm threshold.
3) Increase pump rate.
3D Scale Control
System
Stress
High
Rate of Polymer
Consumption is
high
1) System upset such as a hi gh pH event, process
leak, high heat load event, etc.
2) If coincident with or subsequent to a Conducti vity
adjustment MIN alarm, the controller is unable to
respond to the high stress condition.
1) Conductivity setpoint has been decreased
automatically to induce blowdown.
2) Enter lower conductivity setpoint and relearn
system stress.
Cond. Adj.
MAX
Conductivity
Setpoint
adjusted to the
maximum
1) System stress is low compared to learned stress.
1) If higher cycles are required, enter higher
conductivity setpoint and relearn system stress.
Otherwise, no acti on is required.
Cond.
Adj.
MIN
Conductivity
Setpoint
adjusted to the
minimum
1) System stress is high compared to learned stress.
1) If lower cycles are required, enter lower
conductivity setpoint and relearn system stress.
Otherwise, no acti on is required.