IS-HF-AccUViewLEDEx-100125 Rev 0
15
Troubleshooting
AccUView LED Ex Fault Detection
The AccUView LED Ex performs continuous diagnostic monitoring.
There are 3 levels of fault detection: warnings, errors and failures. Any
faults are displayed in a queue form in the bottom row of the display.
A warning is a screen indication of a problem.
An error indicates a fault or a problem that can usually be corrected by
the operator. During an Error, the 4-20mA output will be affected based
on the set error level. If an error occurs, the instrument will still display
readings and warnings, however the accuracy is unknown and the
readings should not be trusted.
A failure is a system fault. This is NOT a problem the operator can
correct and the unit must be returned to the factory for service. If a
failure occurs, the instrument will not function properly. The 4-20mA
output will be affected based on the set error level.
Type of Fault
Display Reading
Possible Cause
Solution
Failure
FAIL
Major system failure. Contact HF scientific
Technical Service or
Customer Service
Department.
Warning
Flashing %T or ABS
reading
Reading may be
above 102%T.
Recalibrate the
instrument.
Water temperature
changed rapidly.
Allow water temperature
to stabilize.
Error
LAMP
LED Failed
Replace lamp. Refer to
Replacing the Source
LED section.
Error
MA
4-20 mA loop open
Check wiring. See
Setting the 4-20mA
section.
Error
CAL Err
100%T or 0 ABS
calibration failure.
Replace the flow
through cuvette.
Replace the calibration
fluid.
Error
TECO
Temperature
Compensation
Calibration failed.
Contact HF scientific
Technical Service or
Customer Service
Department.
Error
DESC
Humidity is higher
than the set point.
Check air supply.
Error
FLOW
Sample flow has
stopped.
Restore flow.
Error
CLN
The ultrasonic
transducer is not
making contact
with the spring
connections.
Adjust the cuvette to
be sure it is making
contact with the springs
connections.
The flow through has
been removed.
Put the flow through
back in place.
For questions or concerns, please contact HF scientific Technical
Service or Customer Service Department.
Readings - Troubleshooting
Symptom
Possible Cause
Solution
Readings are lower than
expected.
Bubbles in the solution.
Ensure that the drain vent is
open and not obstructed.
Apply back-pressure using
the back-pressure clamp.
For severe cases of bubbles,
a stilling chamber is
available (Part #20106).
Condensate or leaky cuvette.
Check flow through cuvette
for condensate or leaks.
Flow through cuvette.
Clean cuvette as described in
the Maintenance section.
Instrument out of calibration.
Recalibrate the instrument as
described in the Instrument
Calibration section.
Readings are erratic.
Bubbles in the solution.
See above solution.
Debris in flow through.
Clean debris from the
cuvette.
If you need assistance regarding this instrument, please contact the HF
scientific Technical Service or Customer Service Department.
Accessories and Replacement
Parts List
Catalog Number
Accessory Description
19323
100%T Calibration Solution - 500ml
Contact Factory
Replacement Electronics Service Module
24232S
Replacement Quartz Cuvette with Ultrasonic Transducer
100125
Operation Manual, AccUView LED Ex
24306S
Replacement Pressure Regulator
28474
Replacement UV LED Assembly
21062
Tubing Kit (1-Shutoff Clamp, 1 Back-pressure valve, 2 connecting
tubings with fittings for flow through assembly, drain vent)
28044
AccUView LED Ex Instrument
28161
Air Prep Kit with Dryer
To order any accessory or replacement parts, please contact HF
scientific Customer Service Department.
