INSSTCP5MA0116
20
ProbleM
DeFeCTIVe PArT
or PArT To CHeCK
The thermostat is hot.
• In normal operating conditions, the
thermostat housing can reach nearly
40°C at maximum load. It is normal
and will not affect the operation of the
thermostat.
Heating is always on.
• Check if the thermostat is properly
connected. Refer to the installation
section.
Heating does not run even if the
thermostat indicates it is on.
• Check if the thermostat is properly
connected and make sure the red
indicator is not lit. Refer to the
installation section.
The display does not come on.
• Check if the thermostat is properly
connected. Refer to the installation
section. Check the power supply at the
electrical panel.
The red indicator lights up
frequently.
• Contact customer service.
The displayed ambient
temperature is incorrect.
• Check the presence of an air stream or
a heat source near the thermostat, and
correct the situation.
The display indicates E1*, E2**
or E3***.
• Faulty thermal sensor. Contact customer
service.
The display indicates E4****.
• Faulty ground-fault circuit interrupter.
Contact customer service.
Weak luminosity of the display.
• Possibility of a bad contact. Check
thermostat wirings. Refer to the
installation section.
* E1: Faulty ambient exterior sensor (open circuit) - written in the ambient section
** E2: Faulty interior sensor (open circuit) - written in the ambient section
*** E3: Faulty floor sensor (open circuit) - written in the floor section
**** E4: Faulty ground-fault circuit interrupter (GFCI)
N.B. If you do not solve the problem after checking these points, cut off the
power supply at the main electrical panel and contact customer service
(consult our Web site to obtain the phone numbers).
trouBleshooting
Summary of Contents for STCP
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