Fault description
Cause
Remedy
Personnel
31 DHW setpoint unreached
Domestic hot water temperature not
reached for 3
minutes.
Setpoint reduction to actual value.
Domestic hot water
requirements too
high.
Reduce domestic hot
water requirements.
Operator
Calcination in the
heat exchanger or
strainer dirty.
Check the water
quality and, if neces-
sary, take appropriate
measures to comply
with country-specific
regulations regarding
water quality.
Heating and
sanitary techni-
cian
Control valve defec-
tive.
Replace the control
valve.
Heating and
sanitary techni-
cian
32 DHW flow too high: Active
Flow rate is higher than the defined max-
imum flow rate.
Increased domestic
hot water require-
ments.
Reduce domestic hot
water requirements.
Operator
40 Temperature HTG supply: noSensor
Signal fault on the heating supply tempera-
ture sensor.
HTG valve is closed, circulation pump is off.
Sensor incorrect or
not connected.
Check the wiring and
reconnect the sensor,
if necessary.
Electrician
Heating and
sanitary techni-
cian
Sensor defective.
Replace the sensor.
Electrician
Heating and
sanitary techni-
cian
41 Htg supply temperature too high: Active
Heating supply temperature higher than the
defined maximum value.
HTG valve is closed, circulation pump is off.
Control valve defec-
tive.
Replace the control
valve.
Heating and
sanitary techni-
cian
A setpoint that is too
high has been saved.
Correct the setpoint.
Heating and
sanitary techni-
cian
50 HTG setpoint reduction: Active
Setpoint reduction for heating active.
Temperature of
supply heat network
insufficient for the
setpoint saved.
Increase the tempera-
ture of the supply heat
network.
Reduce the heating
setpoint.
Heating and
sanitary techni-
cian
51 HTG setpoint unreached: Active
Heating supply temperature not reached for
3
minutes.
Setpoint reduction to actual value.
Domestic hot water
requirements too
high.
Reduce domestic hot
water requirements.
Operator
Heat exchanger or
strainer dirty.
Check the water
quality and, if neces-
sary, take appropriate
measures to comply
with country-specific
regulations regarding
water quality.
Heating and
sanitary techni-
cian
H3000 E
Faults
01/2023
Item no. 215251
EA no. EA-1291
Operating instructions
34