Faults

TACOCONTROL Z1 S

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

05/2024 Item no. 215251 EA no. EA-1291

Operating instructions

33