Faults, Causes And Remedies; Fault Signals - Heating/Ventilation Hv Operating Mode - Wilo Stratos Notice De Montage Et De Mise En Service

• Remove the terminal box cover (item 2).
• Undo the M5 internal hexagon screws (SW4) in the control module (item 3)
• Pull the control module off the motor (item 4).
• Install the module in the reverse order. Do not forget to install the flat gasket
(item 5) between the motor housing and control module.

10 Faults, causes and remedies

Refer to the "Fault signal / warning message" sequence display and Tables 10,
10.1, 10.2 when handling faults.
Faults
Pump is not running
although the current
entry is switched on.
Pump is making noises.
Table 10: Faults with external fault sources
10.1 Fault signals – Heating/ventilation HV operating mode
• A fault occurs.
• The pump switches off, the fault signal LED (red steady light) switches on.
Twin-head pump: the standby pump is switched on.
• The pump automatically goes on again after a delay of five minutes.
• The transmission of the fault via the serial digital interface depends on the type
of IF Module.
For details, see the documentation (Installation and operating instructions of
the IF Module).
• Only if the fault occurs for the 6th time within 24 hours does the pump go off
permanently, fault contact (FC) opens.
Then, the fault needs to be reset by hand.
EXCEPTION: The pump goes off immediately whenever a fault occurs for the
first time with the code number "E10" and "E25".
Installation and operating instructions Wilo-Stratos/-D/-Z
Causes
Electric fuse defective.
Pump has no voltage.
Cavitation due to insufficient
suction pressure.
Remedy
Check the fuses.
Resolve the voltage inter-
ruption.
Increase the system admis-
sion pressure within the
admissible range.
Check the delivery head and
set it to a lower height if
necessary.
English
37