Electric Boiler Controller NELBC-1
Message
Reset of
Error
Cause and consequences
12 WTS on short
automatic
The temperature sensor at the triacs that control the
heating element for hot water is on short. The heating
element for hot water is turned off and the boiler is
switched to Standby.
13 Boiler frozen
button
The temperature sensor at the outlet of the heating
element for heating has measured negative
temperature. The heating element for hot water is
turned off and the boiler is switched to Standby.
14 Low pressure
button
The pressure sensor in heating system has registered
value below allowed minimum. The heating element
for heating and the pump are turned off and the boiler
is switched to Standby.
15 DHW frozen
button
The temperature sensor at the outlet of the heating
element for hot water has measured negative
temperature. The heating element for hot water is
turned off and the boiler is switched to Standby.
16 B triacs overheat
automatic
or
button
The temperature sensor at the triacs that control the
heating element for heating has registered temperature
above 93°. The output of the heater is reduced by half.
The error is cleared automatically when the
temperature falls below 89°.
17 W triacs overheat
automatic
or
botton
The temperature sensor at the triacs that control the
heating element for hot water has registered
temperature above 93°. The output of the heater is
reduced by half. The error is cleared automatically
when the temperature falls below 89°.
18 Faulty Flash EM
---
Error writing to MCU's flash memory of the executive
module
19 No flow
automatic
or
button
The circulation pump is working but the flow switch /
flow rate sensor does not register flow. The heating
element for heating and the pump are turned off and a
re-start of heating is attempted 2 minutes after.
20 High pressure
button
The pressure sensor has registered value above the
allowed maximum.
21 Faulty heater BL1
button
While the heating element for heating is set for output
above 35%, the measured power on phase 1 is below
70W
22 Faulty heater BL2
button
While the heating element for heating is set for output
above 35%, the measured power on phase 2 is below
70W
User Manual / revision 1.2
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