Fault Signals - Wilo Yonos MAXO-D Installation And Operating Instructions Manual

10.1 Fault signals

• The fault signal is indicated by the LED display (fig. 1a, item 1.1).
• The fault signal LED is continuously illuminated in red (fig. 1a, item 1.2).
• SSM contact opens.
• The pump switches off (depending on the error code), and attempts a cyclical restart.
EXCEPTION: Error code E10 (blocking)
After approx. 10 minutes, the pump switches off permanently and displays the error
code.fig.
Code no. Fault
E04 Mains undervoltage
E05 Mains overvoltage
1)
E09 Turbine operation
E10 Blocking
2)*
E21 Overload
E23 Short-circuit
E25 Contacting/winding
E30 Module overheated
E31 Overheated power sec-
tion
E36 Electronic faults
1)
Only for pumps with P
2)
In addition to the LED display, the fault signal LED is continuously illuminated in red.
* See also warning signal E21 (section 10.2)
Table 10.1: Fault signals
Installation and operating instructions Wilo-Yonos MAXO/-D
Cause
Power supply too low on mains
side
Power supply too high on
mains side
The pump is driven in reverse
(the fluid flows through the
pump from the pressure to the
suction side)
The rotor is blocked
Sluggish motor
Motor current too high
Motor winding defective
Module interior too warm
Ambient temperature too high Improve room ventilation, check
Electronics defective
 200 W
1
Remedy
Check mains voltage.
Check mains voltage.
Check flow, install non-return
valves if necessary
Request customer service
Request customer service
Request customer service
Request customer service
Improve room ventilation, check
operating conditions, request
customer service, if necessary
operating conditions, request
customer service, if necessary
Request customer service
English
19