ERROR
CODE
MEANING POSSIBLE CAUSE SOLUTION
A30
CH supply sensor out of normal operating range
(short circuit)
The CH supply sensor is damaged. Replace the CH supply sensor.
A80
Supply-Return Reversed Error
Description:
CH Supply and Return temperature sensors are
monitored after ignition. If the return water temperature
is higher, then the boiler will be locked out.
The water ow is reversed in the
system
Check the circulation pumps and resolve the
problem
A31
CH supply sensor out of normal operating range
(open circuit)
The CH supply sensor is damaged. Replace the CH supply sensor.
A43
CH return sensor out of normal operating range
(short circuit) - resolving type
Description:
If NTC sensor goes outside the range, a warning will be
generated.
When the sensor is back to the normal operating range, the
warning is gone.
The warning will switch off the system. Heat demands will
be disabled.
Resolving the situation can be achieved only if the sensor
is within operating range again (a lockout reset is
necessary).
The CH return sensor is damaged. Replace the CH return sensor.
A44
CH return sensor out of normal operating range
(open circuit)
The CH return sensor is damaged. Replace the CH return sensor.
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