Wilo Stratos MAXO Notice De Montage Et De Mise En Service page 147

16.2 Mechanical faults without error messages
Faults
Pump is not running.
Pump is not running.
Pump makes noises.
Pump makes noises.
Table 50: Faults with external interference sources
16.3 Error messages
Displays an error message on the display
• The status display will be in red color.
• Error message, error code (E...), cause, and remedy are described as text.
Error messages displayed on the LED display with seven segments
• An error code (E...) is displayed.
Fig. 74: Error code display
The pump is not operational if an error has occurred. If the pump identifies as part of permanent moni-
toring that the cause of the error no longer applies, the error message is revoked and operation resumes.
If an error message is output, the display is permanently on and the green LED indicator is off.
Code Error
401 Unstable power supply
Additional information about causes and remedy:
Power supply too unstable.
Operation cannot be maintained.
402 Undervoltage
Additional information about causes and remedy:
Operation cannot be maintained. Possible causes
1. Grid overloaded
2. Pump is connected to the wrong power supply
3. Three-phase power supply is unsymmetrically loaded by
unevenly connected single-phase consumers.
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
Causes
Electric fuse defective.
Pump has no voltage.
Cavitation through
insufficient suction pressure.
Cause
Unstable power supply.
Power supply is too low.
Remedies
Check fuses.
Reconnect the voltage.
Increase system feed pressure within
permissible range.
Check
delivery head setting, set to lower de-
livery head if required.
Remedy
Check power supply.
Check power supply.
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