en Faults, causes and remedies
80 WILO SE 2019-07
10.1 Maintenance intervals
Regular
▪Clean switchgear.
Annually
▪Check electro-mechanical components for wear.
After 10 years
▪General overhaul
10.2 Maintenance tasks
Cleaning switchgear
‡ Switch off switchgear.
1. Clean switchgear with a damp cotton cloth.
Do not use any aggressive or scouring cleaners or fluids!
Check electrical-mechanical components for wear
Have electrical-mechanical components checked for wear by an electrician. If wear is
ascertained, have the affected components replaced by an electrician or by the Wilo
Customer Service.
General overhaul
During a general overhaul, all of the components, wiring and the housing are checked
for wear. Defective or worn components are replaced.
11 Faults, causes and remedies
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work can lead to death due to electric
shock! Electrical work must be carried out by a qualified electrician in accordance
with the locally applicable regulations.
11.1 Operator responsibilities
▪Observe locally applicable accident prevention and safety regulations of trade associ-
ations.
▪Make sure that the personnel has had the corresponding training for the specified work.
▪Train the personnel on how the system operates.
▪When working in enclosed spaces, a second person must be present for safety reasons.
▪Ensure enclosed spaces have sufficient ventilation.
▪Take immediate countermeasures if there is a build-up of toxic or suffocating gases!
11.2 Fault indication
Possible faults are shown by the fault LEDs and alphanumeric codes on the display.
Have system checked according to the displayed fault and have defective components
replaced. Faults are displayed in various ways:
▪Fault in the control/on the switchgear:
– The red fault signal LED lights up.
The red fault signal LED flashes: Error message only occurs after a set time (e.g. dry-
running protection with switch-off time delay).
– Display of the error code alternates with the main screen. The error code is stored in
the fault memory.
– The collective fault signal is activated.
▪Pump fault
Status icon of the respective pump flashes on the display.
11.3 Fault acknowledgement
Switch off the alarm display by pressing the operating button. Acknowledge the fault
via the main menu or Easy Actions menu.
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