NCB Service Manual 33
Version 1.0
4.4.3
Turning the Boiler ON or OFF
To turn the boiler ON or OFF, press the [Power] button.
If the boiler is in an error condition, the error code will
continue to be displayed on the front panel even when the
boiler is OFF.
Item
Description
Display
Power
ON
Press to start
Normal
operation
mode
Current outgoing hot water
temperature is 60°C
Power
OFF
Press to turn
OFF the
boiler
All displays turn off except
for status icons for currently
active functions.
When power is first applied, turn on the panel
segments and icons on for 3 seconds and check the
LCD for any defects.
4.4.4
Normal Operation
1.
When the boiler is OFF, start <Normal Operation
mode> by pressing the [Power] button.
2.
The current supply or return water temperature is
displayed depending on the selected heating mode
(supply or return temperature mode).
3.
If a Level1 error occurs, the error icon flashes in 1
second intervals, and the error code and the current
water temperature is alternately displayed for 1
second.
4.
If a Level1 error is automatically released or if the
[Reset] button is pressed after the error condition is
resolved, “RST” is displayed for 3 seconds and the
error is released.
5.
If the heat demand option is set to “OT-Room
Controller” at the DIP switch, “RC” is displayed for 2
seconds each time the Space heating, DHW,
Summer/Winter, or ECO button is pressed. This
indicates that the boiler is controlled by the OT-Room
Controller.
6.
Access to <Error history mode> is available via
<Normal operation mode>.
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