Wilo SiFresh Einbau- Und Betriebsanleitung Seite 103

Installation and operating instructions • Wilo-SiFresh • Ed.02/2023-08
Code Fault
550 There is flow through the
pump in the opposite dir-
ection of flow.
Additional information about causes and remedy:
If flow passing through pump in the opposite direction is too strong, the motor
can no longer start.
551 Undervoltage
Additional information about causes and remedy:
The system is running. Undervoltage reduces the pump output.
If the voltage falls below 160 V, the reduced operation cannot be maintained.
552 There is externally gener-
ated flow through the
pump in the direction of
flow.
Additional information about causes and remedy:
The pump can start despite flow through.
553 Electronic module is de-
fective.
Additional information about causes and remedy:
The system is running, but cannot provide full power under the circumstances.
Contact Service.
555 No plausible sensor value
at analogue input AI 1.
Additional information about causes and remedy: -
557 No plausible sensor value
at analogue input AI 2.
Additional information about causes and remedy: -
559 Electronic module too
hot.
Additional information about causes and remedy:
System operation restricted to avoid damage to the electronic components.
560 Incomplete software up-
date.
Additional information about causes and remedy:
Software update was not carried out; system continues to operate with previous
software version.
561 Voltage analogue input
overloaded (binary).
Additional information about causes and remedy:
Binary inputs are impaired. Functions of binary inputs are not available.
563 Sensor value missing
from BMS.
Additional information about causes and remedy:
Control functions impaired. A replacement function is active.
Cause Remedy
External influences Check swing check valve.
cause flow through
against direction of
flow of the pump.
Power supply has Check power supply.
dropped below 195 V.
External influences Check power control of the
cause flow through in other pumps.
the pump's direction
of flow.
Electronic module is Replace electronic module.
defective.
This leads to an unus- Check connected sensor.
able sensor value.
The present signal Check connected sensor.
leads to an unusable
sensor value.
Permissible temper- Ensure permissible ambient
ature of the electronic temperature. Improve room
module is exceeded. ventilation.
The software update Software update with new
was not completed. software bundle is recom-
mended.
Voltage analogue in- Check the cables and con-
put short-circuited or sumers connected to the
too heavily loaded. analogue input power sup-
ply for short circuits.
Sensor source or BMS Check configuration and
is configured incor- function of BMS.
rectly.
Communication has
failed.
en
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