9
Fails startup Damaged
Failes in operation Connection
Erratic display Sensor type
Unstable temperature Sensor connection
Display shows error-code “---“ Low voltage
Display shows error-code “OL“ Sensor
Display shows error-code “SE“ Sensor/cable
Display shows error-code “FE“ Ignition system
Display shows error-code “F99“ Overload
•
Check connector for sucient coltage at the con-
nector. If this is OK, then the module is probably
damaged.
•
Check system wiring and all connectors for correct
connections.
•
Incorrect sensor type used. Replace sensor with
proper PT-100 type.
•
If displayed temperature is higher than actual
temperature, some unwanted resistance is connected
in series with the sensor. This could be the use of
very thin cables or bad connections on the sensor
cable. Recommended cables should be no less than
0.75 mm2
•
Check sensor connectors, if all connections found OK,
replace sensor.
•
This indicates low supply voltage. Check the battery
voltage. This should be above 11 Volts.
•
Low voltage can also be caused by two loads sharing
the same small cable. (High resistance). Generally this
instrument should be directly connected to the battery
to avoid electrical interference and voltage drop.
•
This indicates that the actual temperature is higher
than the adjustment range. That might happen if the
sensor is defective
•
Sensor is defective, short-circuit
•
Sensor is defective, open
•
Sensor cable failure
•
This flame-error code indicates that the Temperature
Controller has received error-input on connector-pin 0.
(Probably because one of the connected ignition-box-
es cannot detect any flame).
•
Check the ignition system
•
This indicates overload of the Temperature Controller’s
burner output.
Trouble-Shooting
Symptom Probable Cause Appropriate Action
Appendix
