Trouble Shooting - DEVI Devireg 530 Instruction Manual

8. Trouble shooting

No light on thermostat
If there is no light on the thermostat after turning it
on then check that the residual current device (RCD)
and breakers are on before contacting an authorized
electrician.
Fault: No heat
1) General
First of all, make sure that all cables, connected to the
thermostat, are connected to the correct thermostat
terminals and that all connections are tight and mak-
ing contact.

2) Mains voltage (terminal 1 and 3)
Ensure that supply voltage 240v is at terminals 1
and 3. if not then check that the RCD and
contactor are on.
3) Thermostat output (terminal 2 and 4)
Measure the voltage at terminal 2 and 4, when the
temperature dial is turned up and the neon has
turned red The reading should be the same as
previously measured at terminal 1 and 3.
If the reading is OK, continue to the next step;
if not replace the thermostat.