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T e c h n i c a l N o t e b o o k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T e c h n i c a l T r a i n i n g
Appliance status:
This function can be used at any time to know what operating phase the appliance is in.
To display this menu:
Press the “mode”
button for at least 3 seconds.
The screen shows the appliance status “S.xx”.
Press the “mode”
button for at least 3 seconds to exit this menu.
Status Heating mode
S.00
No heating demand
S.01
Fan pre-run
S.02
Pump pre-run
S.03
Ignition
S.04
Burner lit
S.05
Pump/fan post-run
S.06
Fan post-run
S.07
Pump post-run
S.08
After-heating short cycle prevention delay
Status Hot water mode
S.10
Hot water demand
S.11
Fan pre-sweep
S.13
Ignition
S.14
Burner lit
S.15
Pump/fan post-run
S.16
Fan post-run
S.17
Pump post-run
Status Hot water reheat
S.20
Preheat cycle on versions with tank
S.21
Fan pre-run
S.23
Ignition
S.24
Burner lit
S.25
Pump/fan post-run
S.26
Fan post-run
S.27
Pump post-run
S.28
The heater locks out tank reheating after a reheat cycle (for 1 minute)
Status Specific messages
S.30
Default condition, no heating or hot water demand. If an EBUS thermostat is connected to the heater, check that the shunt is
present between connectors 3 and 4 of the heater main circuit board.
S.31
“Hot water only” mode
S.32
Test cycle: the fan fan speed is outside tolerances when working
S.34
Frost protection
S.39
Heated floor contact open.
S.40
Re-heating mode activated
S.41
Water pressure too high
S.53
Wait cycle: difference in temperature between heating output and return too high. If ∆T > 30, forced at Pmin
S.54
Wait cycle: lack of water in the system / increase in temperature between heating output and return too high.
S.96
Heating return temperature sensor test.
S.97
Pressure test
S.98
Water outlet and return temperature sensors test.