Troubleshooting And Possible Solutions - Wilo Sub TWU 3 HS Serie Notice De Montage Et De Mise En Service

English
cally restart via the auto reset function. This is to
ensure that the user is properly informed.
Alarm messages (Fig. 11)
Every alarm message contains the error code and
a number set in brackets that specifies how often
the relevant error has occurred.
List of error codes:
E0 – Undervoltage: Supply voltage too low.
1.
Check value (V) at the input
If this error is displayed, the system has to be
checked by a qualified electrician. If this error
occurs frequently, the system may be damaged!
2. E1 – Overvoltage: Supply voltage too high.
Check value (V) at the input
If this error is displayed, the system has to be
checked by a qualified electrician. If this error
occurs frequently, the system may be damaged!
3. E2 – Short-circuit: Displayed if there is a short-
circuit at the motor connection in the frequency
converter (motor). This can be due to faulty cable
insulation, a faulty motor or water ingress. This
error can only be reset by disconnecting the unit
from the mains!
ELECTRICAL hazard!
Electrical current can cause fatal injuries if
not handled correctly! If this error is dis-
played, the connection has to be checked and
repaired by a qualified electrician.
E3 – Dry run: Displayed if the system is switched
4.
off due to low water. If the "auto reset function"
is activated, the system is automatically restarted
after the set interval.
E4 – Ambient temperature: Permitted ambi-
5.
ent temperature of the frequency converter has
exceeded. Check installation conditions and find
a remedy.
E5 – Temperature IGBT module: Permissible
6.
maximum temperature of the IGBT module in the
frequency converter has exceeded. Check the
conditions under which the frequency converter
operates particularly the water temperature and
current consumption of the pump.
E6 – Overload: Displayed if the current consump-
7.
tion exceeds the "Imax" value set in the operat-
ing parameters. This can be caused by harsher
operating conditions, frequent restarts or a faulty
motor.
Before resetting the error, check the following:
• Does the set "Imax" value match the specification
on the rating plate (also see section 3.5)?
• Is the system working under permissible operat-
ing conditions?
If both points have been checked and the er-
ror continues to occur, consult Wilo customer
service.
E8 – Serial error: Error in the internal serial com-
8.
munication of the frequency converter. Contact
Wilo customer service.
48

TROUBLESHOOTING AND POSSIBLE SOLUTIONS

E9 – Overpressure: The set limit value
9.
"P limit" was exceeded. If the error repeats, check
the "P limit" parameter and determine the cause
for overpressure (e.g. blockage in the pressure
pipe) and rectify the same.
10. E11 – Starts/h (leakage): Displayed if the system
starts frequently at brief intervals. In this case,
there is probably a leak in the system. Reactiva-
tion is only possible if the fault has been ac-
knowledged!
Before confirming, make sure that there is no
leakage in the system. Frequent starts can
damage the pump!
If there is no leakage but automatic operation
is still not possible, you can adjust or switch
off monitoring with the help of Wilo customer
service.
11. E12 – Error 12 V: Malfunction in the internal low
voltage circuit of the frequency converter. Con-
tact Wilo customer service.
12. E13 – Pressure sensor: Pressure sensor delivers
incorrect values. Contact Wilo customer service.
9.2 Faults
9.2.1 Fault: The unit will not start or only after a delay
1. Electricity supply interrupted, short-circuit or
earth fault in the cable and/or motor winding
• Have the motor and wires checked by a special-
ist and replaced if necessary
• Check the error messages on the frequency
converter
2. Tripping of fuses, motor protection switch and/or
monitoring devices
• Have the connections checked by an expert
and changed if necessary
• Install and set motor protection switches and
miniature circuit breakers according to the
technical instructions, reset monitoring devices
• Check that the impeller runs freely, if necessary
clean it and ensure it runs freely again
3. Pressure difference between Pmax and Pmin is
too small
• Adjust the "Dp Start" value in the operating
parameters
4. Water consumption too small
• Water extraction is not detected, install a dia-
phragm expansion tank with a volume of 1 – 2 l
9.2.2 Fault: The unit starts, but the motor protection
switch triggers shortly after commissioning
1. The thermal trigger on the motor protection
switch is incorrectly selected and set
• Have a specialist compare the selection and
setting of the trigger with the technical specifi-
cations and correct it as necessary
2. Increased power consumption due to major volt-
age drop
• Have an electrician check the voltage on each
phase and rewire if necessary
3. Incorrect direction of rotation
• Change the direction of rotation via the menu.
4. Impeller slowed by accumulation, clogging and/or
solid matter, increased current consumption
WILO SE 05-2019 DIN A4