
7.1
Error message
Error display
Error code
Description
Possible cause
110
TKW domestic cold water sensor/
heat exchanger inlet of fresh water
station is outside of the measuring
range.
Sensor short circuit/interruption.
112
TWZ circulation sensor is outside
the measuring range.
Sensor short circuit/interruption.
115
TWW domestic hot water sensor/
heat exchanger outlet of fresh
water station is outside of the
measuring range.
Sensor short circuit/interruption.
146
TU1 tank bottom sensor is outside
the measuring range.
Sensor short circuit/interruption.
147
TO1 tank top sensor is outside the
measuring range.
Sensor short circuit/interruption.
151
TPV flow sensor for plate heat
exchanger is outside the measuring
range.
Sensor short circuit/interruption.
159
FLOW flow sensor for the fresh
water sensor is outside the meas-
uring range (integrated in the direct
sensor).
Sensor short circuit/interruption.
172
TPR return sensor for the plate heat
exchanger is outside the measuring
range.
Sensor short circuit/interruption.
252
Flow rate counter is at zero despite
the circulation pump being active.
Faulty flow rate sensor or faulty cir-
culation pump.
ES 5941
Troubleshooting support
08/2020 Item no. 215790 EA no. 1321
Operating instructions
48