Procedure In Case Of Heating Problem - EMS AirFlow S1 Service Manual

Procedure in case of heating problem

Switch the power ON and verify (by hand) the increase of
temperature of the water heater (30). If the heater stays cold,
use the following procedure to identify if the problem is due
or not to the thermostats.
Shunt (A) the thermostat 47
of temperature of the heater.
If the heater starts to be warm, it means that the
thermostat 47 C is out of order and it must be re-
o
placed by a new one (see page 21).
If no increase of temperatue appears, try to rearm
the thermostat 60
In case of the pin stays up, it means that the
rearmament system is out of order and the ther-
mostat 60 C must be replaced by a new one (see
o
page 21).
In case of the pin stays down (good rearmament),
and if the heater doesn't work, shunt the thermos-
tats 47 C (A) and 60
o
At this step, if no heating is produced, control the electrical
supply of the water heater (see page 9).
Pin
28
Shunt B
C (29) and control the increase
o
C (28) by pushing the pin down.
o
C (B) at the same time.
o
Shunt A
29
30
23