Section 1
Ref: REFLEX/SCANFLEX MANUAL
EDITION 1: JULY ’97 41
N) Temperature compensation error:-
1. The position of the transducer/temperature sensor is important, to prevent
heating by sunlight and convection currents. Also, the sensor should be in
a free-air vented position if possible, to avoid hot-spots.
2. Check that the sensor is enabled at Pr.37.
3. Check the resistance of the sensor when disconnected against the value
displayed at Pr.39 when connected. If using RXT series transducer (integral
temperature compensation), check resistance across black core and screen
when disconnected.
Note: The sensor compensates only for temperature variance; it is not expected to
accurately measure the actual temperature.
O) Relays not switching:-
1. Check the programmed relay designations and settings at Pr.8-Pr.22.
Functions can be tested under simulation at Pr.78.
2. Test the relays at Pr.75 or Pr.76.
3. Check contact continuity at the terminals.
Warning:
We recommend disconnection of external controls, alarms etc. before
performing the above tests.
P) The PCB hums loudly:-
1. Check the transformer mounting screws for tightness on the bottom PCB.
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