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ISO 9001

Sistemi di regolazione automatica per: 

condizionamento/riscaldamento/processo termico industriale. 

Le caratteristiche contenute in questa pubblicazione possono essere modifi cate senza preavviso

Automatic control systems for:

air conditioning/heating/industrial thermal process.

The performances stated in this sheet can be modifi ed without any prior notice 

LEDs 

behaviour

Error

Actuator use

Actuator behaviour

Typical trouble 

shooting condition

Reset 

procedure

Automatic calibration  

(DIP N. 7 OFF)

Manual calibration  

(DIP N. 7 ON)

1

RED ON

Valve stroke 

less than 5mm

Calibration/first 

installation

The actuator pushes/pulls 2 times 

(unexpected stall) trying to remove 

the possible obstacle. After 2 

tries an alarm is signalled and the 

actuator moves to initial position 

and does not respond to control 

signal. Stroke value is not updated 

because out of range

The actuator pushes/pulls 2 

times against endpoint during 

calibration and the actuator 

moves to the initial position and 

then it does not respond to the 

control signal. The actuator 

keeps the previous stroke

Valve with a stroke 

length lower than 

5mm

Remove power 

and power up 

again

2

RED LED 

quick 

bl 

GREEN ON

Stroke longer 

than 60mm

Calibration/first 

installation

The actuator exits the 60mm stroke 

range and it moves toward the new 

stroke limit signalling an anomaly. 

The actuator pushes/pulls 2 times 

against the new stroke limit, then it 

goes back to the initial position still 

signalling the anomaly until it is not 

within 60mm. The actuator does 

not calibrate the stroke after 10s 

(wrong range)

The actuator exits the 60mm 

stroke range and it moves 

toward the new stroke limit 

signalling an anomaly. The 

actuator pushes/pulls 2 times 

against the new stroke limit, then 

it goes back to the initial position 

still signalling the anomaly until it 

is not within 60mm. The actuator 

does not calibrate the stroke 

after 10s (wrong range)

Valve with a stroke 

length longer than 

60mm

Remove power 

and power up 

again

3

RED Quick 

Blinking 

Unexpected 

stall within the 

calibrated stroke 

range

normal operation

The actuator tries 5 times against 

the new stall condition and then 

after 10s the actuator updates the 

new stroke length

The actuator tries 5 times 

against the new stall condition. 

At the end of the attempts 

the fault will be signalled. The 

actuator does not update the 

new stroke length, but after 60s 

makes other attempts to verify 

the stall condition

Valve stuck

Inverted control 

signal

4

RED Quick 

Blinking 

Stroke longer 

than expected Normal operation

The actuator moves toward the 

new stall condition with a lower 

speed; after 10s the actuator 

updates the new stroke  value

The actuator moves toward the 

new stall condition with a lower 

speed; after 10s the actuator 

does not update the new stroke  

value

Stem connection 

loose or valve 

damaged

Inverted control 

signal

5

RED slow 

Blinking

Low Power 

Voltage

Normal operation

The actuator is still working but 

performance cannot be guaranteed

The actuator is still working 

but performance cannot be 

guaranteed

1. Wrong transformer 

size

Correct Voltage 

Power

2. Unstable power

6

RED slow 

Blinking

High Power 

Voltage

Normal operation

The actuator is still working but 

performance cannot be guaranteed

The actuator is still working 

but performance cannot be 

guaranteed

1. Wrong transformer 

size

Correct Voltage 

Power

2. Unstable power

COMPORTAMENTO STANDARD dei LED

STANDARD LEDs BEHAVIOUR

1° Emissione / 1

st

 

Issue 

rev. 

 09/15 

 6      DIM205

N° Comportamento 

LED

Stato servocomando

1

VERDE FISSO

Il servocomando è arrivato 

all’estremo della corsa appresa

2

VERDE 

LAMPEGGIANTE

Il servocomando è arrivato o si sta 

muovendo verso un punto intermedio 

della corsa appresa

3

ROSSO VERDE 

LAMPEGGIANTE

Il servocomando sta apprendendo 

la corsa o sta effettuando il 

posizionamento iniziale

4

ROSSO VERDE 

FISSO

Comando manuale inserito, il 

servocomando ignora il segnale di 

comando. 

ATTENZIONE! La scheda è 

alimentata

LED 

behaviour

Actuator status

1

GREEN ON

The actuator arrived at the extreme 

point of the stroke read

2

GREEN BLINKING

The actuator arrived at the 

intermediate point of the stroke read

3

RED GREEN 

BLINKING

The actuator is reading the stroke or 

it is going to initial position

4 RED GREEN ON

Manual control ON, the actuators 

ignores the control signal. 

ATTENTION! The electronic board 

is electrically supplied

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