INSSTCNP5MA0612
ing to the
/
mode) with a high degree of accuracy.
When the heating starts or stops, it is normal to hear a “clic”
sound. It is the noise of the relay which opens or closes, as
applicable.
Backlighting
The screen lights up when you press down a button. If you
do not press down any button for more than 15 seconds, the
screen turns off.
N.B. If you press down the + or - button once when the back-
light is off, it will light up without changing the set point
value. The set point value will change only if you press
down one of these buttons again.
Ground-fault Circuit Interrupter (GFCI)
The GFCI is designed to reduce the risk of electric shock. It
can detect a leakage current of 5 mA. If a defect is detect-
ed, the GFCI device lights up, and both screen and heating
system circuit are deactivated. The GFCI can be reinitialized
either by pressing down the Test button or by disconnecting
the thermostat at the electrical panel.
Ground-fault circuit interrupter (GFCI) verification
It is important to verify the ground-fault circuit interrupter in-
stallation and operation on a monthly basis.
GFCI verification procedure
1- Increase the temperature set point until the heating power
bars are displayed (displayed beside the floor tempera-
ture).
2- Press down the Test button.
3- The following two cases can occur:
a) Successful test: The red indicator of the thermostat
lights up. In this case, press down once again the Test
button to reinitialize the ground-fault circuit interrupter,
the red indicator turns off.
b) Failed test: The red indicator does not light up and the
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