Operating instructions Dcontrol Date 0730
TBL02_54-GB 0730 Part-No. 00153238-GB
Page 22 / 28
8. Faults and rectification of these
8.1 Mains fault
Function only for a connected inductive load
The device is provided with a built-in phase-monitoring function for the mains supply.
In the event of a mains interruption (failure of a fuse or mains phase) the unit switches off after a delay. The unit then
switches on again automatically when the voltage has been restored.
Line fault (failure of a line phase) yellow + red
Remedy:
Check the mains supply and the internal semiconductor fuses.
For PKDT5 “mobile application“ version, phase failure is deactivated!
In special cases phase failure can be deactivated for other types
() Electrical connections: Adjustment to specific mains conditions
8.2 Temperature fault
The unit is fitted with a built-in temperature monitoring device coupled to the internal heat sink. The unit cuts out at a
temperature of approximately 90 °C and cuts in automatically again when the unit has cooled down again to about
65 °C. An excessively high unit temperature is signalled by the internal LED’s.
Excessively high unit temperature (measured at the internal heat
sink)
red blinking
Interruption in the leads to the heat-sink sensor green + red on and yellow blinking
Remedy in the event of an excessively high unit temperature:
- Check whether the heat dissipation is adequate.
- Check for any overloading of the unit, i.e. whether the maximum control current occurring is above the
rated current for the unit.
8.3 Motor fault
The unit cuts out and does not switch on again when the connected thermostat “TB” or thermistor “TP” for type PKDM
have tripped (interruption between both terminals “TK” () Electrical connection: Motor protection).
Motor fault (interruption TK terminals) red
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