Wilo Control MS-L, Installation And Operating Instructions Manual

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en
Installation and operating instructions • Wilo-Control MS-L • Ed.02/2022-05 33
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 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!
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
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.
11.3 Fault acknowledgement
• 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!
11.4 Error messages
Symbol Signalling Cause Troubleshooting
LED lights up. Service interval has elapsed. Carry out maintenance. Have customer service reset the
counter.
LED flashes. Operating parameters exceeded. Check the system’s settings. Have customer service reset
the counter.
LED lights up. High water alarm active Check pump/system operating conditions and level set-
tings.
LED flashes. Switchgear is operated without any
load. Check mains connection of the switchgear and pump con-
nection.
LED lights up. Set rated current exceeded Check and, if necessary, correct the setting of DIP switch 1.
LED lights up. Temperature sensor in motor triggered Check connection, the converter bridge may be missing.
Check the operating conditions of the pump.
All LEDs light up for
2 s. Key lock active Deactivate key lock.
All LEDs light up
from right to left. Incorrect phase sequence at mains con-
nection Swap over 2 phases at the mains connection of the
switchgear.
All LEDs flash at the
same time. Sensor fault Check connection.
Contact customer service to have the faulty sensor re-
placed.
11.5 Fault memory The last fault is stored retentively in the fault memory. The corresponding LED lights up
when the fault is retrieved.