33
Symptom Action
2
Display flashes on
and off (1 second
approx.)
1. Switch off the mains supply to the product.
2. Disconnect all signal wires.
3. Switch the mains supply on: If symptoms are still present, return
the product for examination.
4. Replace each signal wire in turn until the fault occurs.
5. Investigate and rectify any faults in the wiring, external sensors /
transducers and modules associated with that connection.
Explanation
The internal power supply is unable to power up. If the voltages
cannot be generated, the power supply switches off for approx.
1 second. The power supply then attempts to power up again. If the
fault is still present, the cycle is repeated until the fault is removed.
This is a safety feature and does not damage the product.
3
Product powers
up for a period of
time (greater than
1 minute), then
switches off
1. Monitor the mains supply and ensure it is continuous and within
the specification limits.
2. Measure the ambient temperature and ensure it less than
specified.
3. Investigate symptom 2.
Explanation:
A re-settable thermal cut - out device will operate if one or more
of the following occurs:
- The power drawn exceeds the specification.
- The input mains voltage is less than specified.
- The ambient temperature is more than specified.
- The internal power supply will switch off until the products
temperature drops below 65 °C. This is a safety feature and does
not damage the product.
4
Controller not
responding to
changes in level
1. LLO-LHI have been set to 100%(causing 0% Pv to be displayed.2)
reset level inputs
5
Incorrect number /
letter / symbol
displayed
1. Press '
OK
' for 5 seconds
2. '888' should be displayed
3. Press '
OK
' again
Explanation:
Missing lines indicate a segment failure. This may make readings
difficult to interpret or for them to be interpreted incorrectly.
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