TACOCONTROL Z1 S
Faults
The error message also indicates the priority level of
the error. Depending on the priority level, the unit is
switched off:
– Critical (A) = unit is switched off, because there
is an error that is critical for the installation.
– Low (B) = parts of the unit are switched off.
– Warning (C) = unit continues operating.
9.3.2 Fault table
Faults with error message
The following sections describe faults and work required to repair
them, which are displayed on the HMI.
Fault description
Cause
Remedy
Personnel
01 Supply temperature: noSensor
Signal fault on the heat network supply
temperature sensor.
Valves are 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
10 Supply temperature too high: Active
Temperature of the heat network supply
higher than the defined maximum value.
DHW valve is closed.
Water temperature in
the supply is higher
than allowed.
Check the heat supply.
Heating and
sanitary techni-
cian
20 DHW temperature; no Sensor
Signal fault on the domestic hot water
sensor.
DHW valve is closed.
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
21 DHW temperature too high: Active
Temperature of the domestic hot water
higher than the defined maximum value.
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
30 DHW setpoint reduction: Active
Setpoint reduction for domestic hot water is
active.
Temperature of
supply heat network
insufficient for the
setpoint saved.
Increase the tempera-
ture of the supply heat
network.
Reduce the nominal
temperature for the
domestic hot water.
Heating and
sanitary techni-
cian
32
Operating instructions
05/2024 Item no. 215251 EA no. EA-1291
