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

10 Faults, causes and remedies

Refer to the "Fault signal / warning signal" flow diagram and Tables 10, 10.1,
10.2 for troubleshooting.
Faults
Pump is not running
although the power
supply is switched on.
Pump is making
noises.
Table 10: Faults with external interference sources

10.1 Fault signals - Heating/ventilation HV operating mode

• A fault occurs.
• The pump goes off, the fault signal LED (continuous red light) is activated.
Double 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, SSM 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".

10.2 Fault signals - Air-conditioning AC operating mode

• A fault occurs.
• The pump goes off, the fault signal LED (continuous red light) is activated. The
error message appears on the display, SSM opens. Then, the fault needs to be
reset by hand.
Double pump: The standby pump is switched on.
• 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).
NOTE: Code nos. "E04" (mains undervoltage) and "E05" (mains overvoltage) are
treated as faults only during AC operation and lead to immediate deactivation.
Installation and operating instructions Wilo-Stratos/-D/-Z/-ZD
Causes
Electrical fuse defective.
Pump has no voltage.
Cavitation due to insuffi-
cient suction pressure.
Remedy
Check fuses.
Reconnect the voltage.
Increase the system suction pres-
sure within the permissible range.
Check the delivery head and set it
to a lower height if necessary.
English
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