DIGITAL CONTROL UNIT FOR THERMAL
SOLAR SYSTEMS - Art. S303
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FIS303ENCL - 01/2022
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: +39 02 97249134 - +39 02 97249135
www.icmaspa.it - sales@icmaspa.it
24
22
TDST24M100SE 035912 111220
WARRANTY
In the view of a constant development of their products, the manufacturer reserves the right for changing technical data and
features without prior notice. The consumer is guaranteed against any lack of conformity according to the European Directive
1999/44/EC as well as to the manufacturer’s document about the warranty policy. The full text of warranty is available on
request from the seller.
TROUBLESHOOTING
ANOMALY POSSIBLE CAUSE
During normal operation the
control unit displays the symbol
and emits an acoustic signal
characterized by a series of ‘beeps’
together with the quick ashing of
the red power supply led.
The probe originating the problem is
ashing on the display.
The control unit has revealed an anomaly on the probe. The display shows the
number of the damaged probe and the type of anomaly present.
In the selection of the installation to
be realized (installer parameter P1)
one or more probes ashing.
The probe is miswired or damaged.
The probe has detected a temperature included between
+180°C .. +199°C
EEE
=
---
The probe has detected a temperature included between
-30°C .. -20°C
=
Probe is short circuited (R = 0) or is detecting a tempera-
ture higher than 200°C.
COL HIGH
S_2 HIGH
S_3 HIGH
=
COL OPEn
S_2 OPEn
S_3 OPEn
Probe missing, not properly wired or open (R=∞) - Probe
is detecting a temperature lower than -31°C.
=
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