AEG Thyro-A Operating Instructions Manual page 80

Error: LED ON green lights up and the power output is too low
• Check „Pulse Inhibit":
If the LED „Pulse Inhibit" lights up:
• X2.1, X2.2. must be connected (hardware obstruction).
• If the LED „Load Fault" lights up at the same time there is a case of
undervoltage.
• Check trigger pulse:
The internal diagnosis LEDs „H350" of all modules of a controller flash
simultaneously corresponding to power output as pulse width modu-
lation in TAKT operation and as a flash frequency in VAR operation.
As long as these diagnosis LEDs show a trigger pulse dependent on
the setpoint, then the setpoint setting and the adjustment of the de-
vice is OK. The connection to the load is probably not intact or there is
a load interrupt. If the load does not reach the necessary power, even
though the H350 LEDs of the controller are already shining constantly
(100% level control, full mains voltage at the load) then the load or the
transformer is not properly dimensioned or the load has increased the
resistance through ageing. An intermittent flashing of the Pulse Inhibit
and Load Fault LEDs indicates an active limitation value.
• Check setpoint value/control value:
• Check setpoint setting at terminal X2.4 (+) against X2.3 (ground).
When using the analog setpoint value make sure the DIP switches
6,7,8 are set up correctly, even if the device is operated in Thyro-
Tool Mode. A 5...10kOhm potentiometer at X2.1 and X2.8 when the
DIP switches 6,7,8 are set up at 0...5V can be connected to X2.4
with wipers as a test setpoint value transmitter. When using a bus
setpoint value make sure the setpoint value is activated with appro-
priate wiring to X22 in accordance with the bus manual.
• Check if the „H350" LEDs indicate the current degree of level con-
trol; see „check trigger pulse". Through varying the setpoint value
the device must be capable of being operated from 0% to 100%
level control, as long as no limitation is desired.
• Check if the maximum control value/control limit via (R203) or via
the software is set at the correct parameter.
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