30
STZSkW ed 12/07
ZEUS Superior kW
Technical Documentation
Technical Documentation
After 24 hours from the last activation, indepndently from the functioning state of the boiler
(Summer or Winter)
, the pump (M1) is made to operate for a period of time of 30 seconds
and the three-way valve (M30) is made to operate for a period of time of 10 seconds.
Pump/three-way valve anti-
block system
Safety devices.
If the over-temperature safety thermostat contact opens, boiler functioning is blocked.
To re-start the appliance, press button "C" to "Reset" and successively
make a domestic
hot water or heating request.
Safety thermostat block
If during the burner ignition sequence, with fan powered, the 50 Pa signal is not reached
within 30 seconds, the fault is signalled keeping the fan powered and preventing burner
ignition.
If during normal functioning of the burner the signal lowers to values below 50 Pa the
fault is signalled keeping the fan powered and preventing burner ignition.
If the signal reveived does not exceed 2 Pa, the board logic commands supposes that the
fan speed control is broken; in this case the fan is powered with 1 minute cycles
(30 seconds
active and 30 seconds off).
The burner stays off while the fault remains
.
Fan anomaly
In the case of high resistance of the safety thermostat contact
(contact not perfectly closed or
obstructed)
, the P.C.B. carries out a reset and starts-up a new contacts verification cycle; if
the problem persists after 6 verification cycles, boiler functioning is prevented.
To re-start the appliance, press "C" to "Reset"
and successively
make a domestic hot water
or a heating request.
Electro-mechanical contacts
block
(safety thermostat)
If the fan is at a standstill, an air signal exceeding 45 Pa is received, the board logic
commands suppose that the transducer is broken
and the error is signalled after 10 seconds
from the occurrance of the fault, removing voltage from the fan and preventing burner
ignition.
Flue flow meter fault
If during normal functioning of the fan the signal recieved from the board exceeds 100
Pa
(even if remaining within the limits of correct transducer functioning)
the board logic
commands suppose that the fan speed control is broken.
The fault is signalled and the burner is kept operating.
Incorrect fan speed fault
If during functioning conditions
(stand-by or with request active)
the transducer signal
received from the board is outside of the correct functioning range
(0.25 - 3.2 V)
the board
logic commands suppose that the transducer is broken or doesn't have a correct electric
connection The fault is signalled without activating the burner.
Flue flow meter out of
range fault
The circuit board carries out a periodical self-check to control correct functioning. During
operation in heating mode or with the boiler in Stand-by, the function is activated every
18 hours from the last check/boiler power supply.
When operating in doemestic hot water mode, the self-check starts-up within 10 minutes
after the end of the withdrawal in progress for a duration of about 10 seconds.
N.B.:
the boiler remains inactive during the self-check, the display continues to show the
operating status before the self-check, and then re-starts normal functioning.
Periodical self-check
