SECTION 5
P) 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 prevent hot-spots.
NOTE: The sensor compensates only for temperature variance, it is not expected to
accurately measure the actual temperature.
Q) Temperature reads 20ºC all the time:-
1. Check the transducer wiring and connections to the instrument. Note that
different connections are used if a temperature compensated transducer is
connected. See Figure 3, Page 3.
2. Check fuse F2 T80mA.
R) The boards hums loudly:-
* Usually vibration from the transformer.
1. Check the mounting screws for tightness.
S) Relays not switching:-
1. Check the programmed relay designations and settings at Pr.8.1 - Pr.8.3
Functions can be tested under simulation using Pr.12.5 (Not differential).
2. Check contact continuity at the terminals 14 - 22.
WARNING: It is recommended that all external controls, alarms etc. are
disconnected before performing the above tests.
Ref: MINIFLEX LR MANUAL Rev. 0 47
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