32
SETPOINT RECOVERY FUNCTION
If there is no communication (OT) with the
SIME HOME PLUS
and if the relative parameter is enabled, the setpoint recovery
function is activated. This function activates a heating request
with a fixed setpoint set using the relative tsp. The function
deactivates if the wired or wireless communication (OT) with
the
SIME HOME PLUS
is restored.
For example: Failed communication with the
SIME HOME PLUS
and tsp 1 = 1, the setpoint recovery function is activated with
the setpoint set in tsp 8 (20-90°C).
SETPOINT WITH TA REQUEST
When a heat request is made via the closing of a T.A. contact
of one of the zones, the setpoint of the relative zone is sent to
the boiler board (parameters 15-17). The request terminates
when the T.A. contact is opened.
SETPOINT WITH T.A. REQUEST AND OTC FUNCTION
(sliding temperature)
If the boiler board is connected to the external temperature
sensor and the parameter relating to the requesting zone is
other than 0, the CH mode with OTC is enabled. The heating
setpoint is given by the value of the external temperature sen-
sor and the value of factor K (this can be set in the designated
tsp relating to zones 2, 3 and 4 from 0 to 90).
Heating setpoint
20
15
10
5
0
-10
-15
-5
-20
80
90
70
60
50
40
30
20
°C
°C
K=90 K=60 K=45
K=30
K=22
K=15
K=75
External temperature
Fig. 35
DISPLAY OF COMMUNICATION FAULTS ON THE
SIME HOME
PLUS
The user can decide whether or not to display the fault codes
using the tsp No. 4 / 5 / 6 / 7.
COMMUNICATION FAULTS
If any communication faults occur, they will be indicated on
the
SIME HOME PLUS
by the board.
Description of faults on the R.U.
Code in
OT-STD
Priority
Thermostat safety device open (with low
temperature zone present)
51
1
Fault in low temperature zone sensor
interrupted or short circuited
52
2
No communication between the MLC30
board and the board downstream
54
3
No communication between the
SIME
HOME PLUS
and the MLC30 board
70
4
PUMP ANTIBLOCKING FUNCTION
After 24h of inactivity, each pump (or zone valve) is controlled
for 10 seconds to prevent the pump from blocking. Pump acti-
vation is carried out in the event of no heating request.
The antiblocking function is managed individually for each
pump.
MIXING VALVE ANTIBLOCKING FUNCTION
After 24h of inactivity, the mixing valve is controlled on full
opening and closing to prevent it from blocking. Activation of
the mixing valve is carried out in the event of no heating re-
quest.
SETTINGS
1
2
3
SW
1
2
3
ON
Fig. 36
Dip
switch
OFF (Open)
ON (Closed)
Settings
SW1
The MLC30 board is
forced in OT-STD
SW1 must always be
set to OFF
ON
SW2
4 high temperature
zones
One low temperatu-
re zone + one high
temperature zone
ON
SW3
On the C.R.1 I can
see the tsp of the
boiler board, I can
set the max CH water
Setpoint of the boiler
and I can see the
boiler delivery tempe-
rature *
On the C.R.1 I can
see the tsp of the
MLC30, I can set the
maximum working
temperature of the
low temperature zone
and I can see the
temperature read by
the low temperature
zone sensor
OFF
(*) If presence of the low temperature zone is selected (using
SW2) and SW3 is set to “open”, all the boiler heating re-
quests are prevented until SW3 is set to “closed” again.
m
WARNING
If the
SIME HOME PLUS
control is used, it is possible
to display and modify the boiler parameters or the
parameters of the MLC30 board:
– access Menu / Technician / Parameters / Boiler
– enter the password 12345
– if SW3 = OFF on MLC30 = display/modification of
boiler parameters
– if SW3 = ON on MLC30 = display/modification of
zone parameters.
