Troubleshooting guide
The following is a list of operating symptoms, their probable cause and action to be taken.
SYMPTOM CAUSE ACTION
Loss Of Echo (LOE)
display will flash
CAbL/LOE, neon L1 will
flash but no pulsing is
felt on transducer face
open circuit - check transducer wiring. Refer
to fig. 2, 3 & 4
defective transducer - check max. temp. P-66 against
transducer rating
- try a substitute
display will flash
CAbL/LOE, neon L1 will
be continuously off and
no pulsing is felt on
transducer face
short circuit - check transducer wiring. Refer
to fig. 2, 3 & 4
defective transducer or
circuit board
- check max. temp. P-66 against
transducer rating
- try substitute
display will flash LOE,
neon L1 will flash, puls-
ing is felt on transducer
face
level or target out of
range. Under normal
conditions max. range
is 10 m plus 20% of P-3
(far blanking)
- check transducer specifications
- check calibration parameters
application too steamy.
Under these conditions
range may be adversely
affected
- re-locate transducer.
Refer to transducer installation
page 3 – 1.
if condition occurs only
during filling
- increase fail-safe timer, P-75.
transducer face - clean
covered
- move transducer to better location
material build-up
on face
- mount in standpipe
PL-399 8 — 4
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