Faults, Causes And Remedies; Operator Responsibilities; Fault Indication; Fault Acknowledgement - Wilo Control MS-L Installation And Operating Instructions Manual

11

Faults, causes and remedies

11.1

Operator responsibilities

11.2

Fault indication

11.3

Fault acknowledgement

11.4

Error messages

Symbol Signalling
LED lights up.
LED flashes.
LED lights up.
LED flashes.
LED lights up.
LED lights up.
All LEDs light up for
2 s.
All LEDs light up
from right to left.
All LEDs flash at the
same time.
11.5

Fault memory

Installation and operating instructions • Wilo-Control MS-L • Ed.02/2022-05
General overhaul
During a general overhaul, all of the components, wiring and the housing are checked for
wear. Defective or worn components are replaced.
• 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!
The LEDs indicate possible faults. Have the system checked according to the displayed fault
and have defective components replaced. Faults are displayed as follows:
• LED lights up or flashes.
• The collective fault signal is activated.
• If the internal buzzer is activated, there is an audible alarm signal.
• Press the "Buzzer off/reset" button to deactivate the alarm and the collective fault sig-
nal.
• Press the "Buzzer off/reset" button for at least 1 s to acknowledge a fault.
NOTICE! The fault can only be acknowledged once the error has been remedied!
Cause
Service interval has elapsed.
Operating parameters exceeded.
High water alarm active
Switchgear is operated without any
load.
Set rated current exceeded
Temperature sensor in motor triggered
Key lock active
Incorrect phase sequence at mains con-
nection
Sensor fault
The last fault is stored retentively in the fault memory. The corresponding LED lights up
when the fault is retrieved.
DANGER
Risk of fatal injury due to electrical current!
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!
• Observe local regulations!
Troubleshooting
Carry out maintenance. Have customer service reset the
counter.
Check the system's settings. Have customer service reset
the counter.
Check pump/system operating conditions and level set-
tings.
Check mains connection of the switchgear and pump con-
nection.
Check and, if necessary, correct the setting of DIP switch 1.
Check connection, the converter bridge may be missing.
Check the operating conditions of the pump.
Deactivate key lock.
Swap over 2 phases at the mains connection of the
switchgear.
Check connection.
Contact customer service to have the faulty sensor re-
placed.
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