User
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for more than 3 seconds, error is generated. In case sensor is back to the normal operating range, error is gone. Normal operating
range for the outdoor sensor is from -40°C till +50°C. With sensor broken in a way that he makes an open circuit, error will be
generated only if a curve is selected: OTC will be disabled but heating mode will be possible. In case 2 or more sensors are broken,
controller will pick up the first that was outside the operating range. Resolving error situation can be achieved only if the sensor is
within operating range again.
F40
High water pressure error, caused by the water pressure sensor. Water pressure is higher than Water pressure high limit. In error
mode, the heat demand and the pumps are switched off.
F41 – F42 – F43
Water filling (automatic). Auto water filling functionality is disabled if boiler is set in OFF mode.
F47
Water pressure sensor not connected. In error mode, the heat demand and the pumps are switched off. Resolving error situation can
be achieved only if the sensor is connected again.
F50
DHW sensor out of normal operating range (short circuit or open circuit). If NTC sensor goes outside the range (-5÷125 °C), error will
be generated. In case sensor is back to the normal operating range, error is gone. In error mode, heat demands will be disabled. In
case 2 or more sensors are broken, controller will pick up the first that was outside the operating range. Resolving situation can be
achieved only if the sensor is within operating range again.
F51
Solar panel sensor (PT1000) out of normal operating range (short circuit or open circuit). If NTC sensor goes outside the range (-
20÷150°C), error will be generated. In case sensor is back to the normal operating range, error is gone. In error mode, heat demands
are not disabled. In case 2 or more sensors are broken, controller will pick up the first that was outside the operating range. Resolving
situation can be achieved only if the sensor is within operating range again.
F52
DHW sensor out of normal operating range (short circuit or open circuit). If NTC sensor goes outside the range (-5÷125 °C), error will
be generated. In case sensor is back to the normal operating range, error is gone. In error mode, heat demands will be disabled. In
case 2 or more sensors are broken, controller will pick up the first that was outside the operating range. Resolving situation can be
achieved only if the sensor is within operating range again.
F53
Exhaust sensor out of normal operating range (short circuit or open circuit). If NTC sensor goes outside the range (-5÷125 °C) and this
condition lasts for more than 3 seconds, error will be generated. In case sensor is back to the normal operating range, error is gone. In
error mode, heat demands will be disabled. In case 2 or more sensors are broken, controller will pick up the first that was outside the
operating range. Resolving situation can be achieved only if the sensor is within operating range again.
F81
Drift test waiting. System is waiting for sensor drift test.
5.5
Additional Functions
5.5.1
LCD symbols test
If the main power supply is given there is a test of the LCD.
5.5.2
Air purge function
During this function, heat demand is switched off and fan will start with maximum number of revolutions (see Maximum
absolute Fan speed parameter) for 120 seconds.
Also in the same time, supply pump will be switched on for 5 seconds and off for others 5 seconds continuously.
Diverting 3WV will be moved in CH position for the firsts 30 seconds, then in DHW position for 30 seconds, then in CH
position for 30 seconds and finally in DHW position for 30 seconds.
In this way, air bubbles disappears and normal operation of the supply pump is secured.
During the fan on period, there will be an indication on the LCD display:
Function can be skipped pressing
reset
K4
push button.
This function can be activated in four conditions:
1.
If the controller is plugged in to the Mains for the first time.
2.
After a manual reset to reset the lockout fault E03: High limit temperature protection.
3.
When the central heating water pressure is built up to the normal level after the fault F37 or fault F40.
4.
After a manual reset to reset the lockout fault F43: Nominal water pressure not reached within the defined time (after a manual or
automatic filling)
If there is no heat demand afterwards, the controller will switch to standby mode.
5.6
OpenTherm communication
The OpenTherm remote control is acting as a master and boiler controller is acting as a slave.
5.6.1
History information
The controller board has a possibility to register fault codes and to write some additional history information in non-volatile
memory:
•
Number of hours with Main power supply ON
•
Fault history buffer: last 8 errors with the operating hour when they are occurred*
•
Number of total burner switching
•
Number of burner switching in CH mode
•
Number of burner switching in DHW mode
•
Number of CH hours of operation
•
Number of DHW hours of operation
•
Number of burner off hours
•
Number of CH Pump ON hours of operation
Error codes can be accessed via OT room unit, via display and via PC.
The reset of the history information can be accessed via PC and via display.
