AEG Electrolux THYRO-A Operations Instructions download pdf (Page 42)

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The devices delivered correspond to quality standard ISO 9001. Should

you experience any malfunctions or other problems, please contact our

technical support team, see Contacts on page 6.

Here are several tips to help resolve problems:

Error: LED ON green does not light up or LED „pulse inhibit“ ﬂashes

slowly

• Check power unit fuse F1:

If the fuse is defective:

• Check if there is a short-circuit at the load or wiring.

• Check the type of load. When setting for an ohmic load and using a

transformer load the fuse F1 can be tripped by too high rush currents.

• With high temperature elements with a larger R

warm

/ R

cold

ratio you

must check that in operating mode TAKT the switch-on current does

not exceed the rated current of the device.

• With a transformer load an alloyed thyristor can generate a pulsed DC

voltage and thus lead to a case of fusing. Check with an ohmic load

e.g. 100W light bulbs single-phase / in star connection.

• Check microfuse F2:

If the fuse is defective :

• Replace defective fuse (500 V 1.6 A T). Also check the fuse in cases of

faults with the external fuse if present.

• Check SYNC voltage:

• Check if the synchronization voltage at the affected module is avail-

able between the microfuse and the terminal X1.1 at the affected

module. As long as the fuses of the module are consistent the voltage

can alternatively be measured between U1 and X1.1,...

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 modula-

tion 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 device

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...10 k potentiometer at X2.1 and X2.8 when the DIP swit-

ches 6,7,8 are set up at 0...5 V 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 appropriate wiring to

X22 in accordance with the bus manual.

• Check if the „H350“ LEDs indicate the current degree of level control;

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..

• Check wiring:

• Check if the wiring of terminal X1.1 is correct, that the mains is con-

nected to terminals U1 (V1, W1 if present) and the load is connected

to U2 (V2, W2). In the case of incorrect wiring it may be that the

device only works with small setpoint values and switches to failure

with larger setpoint values.

8. HELP IN THE EVENT OF PROBLEMS

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AEG Electrolux THYRO-A Operations Instructions Page 42

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