Table Of Contents 8.5 Warning Signals; Adjust Operating Mode And Pump Output; Troubleshoot; Personnel Requisition - Wilo Yonos MAXO Installation And Operating Instructions Manual

Troubleshoot

EN
7.4

Adjust operating mode and pump output

Factory setting
The pumps are delivered in control mode Δp-v. The re-
quired delivery head is preset according to pump type at
between ½ and ¾ of the maximal required delivery head
(see pump data in the catalogue).
Adjust operating mode and pump output according to
system requirements.
Adjust the settings
In the plan the unit is displayed at a certain duty point
(hydraulic full load point at calculated maximum heating
load).
When commissioning, adjust the pump output (delivery
head) to the corresponding duty point. Select the alter-
native operating mode with constant speed.
1. Adjust desired operating mode with operating knob.
▶ The LED display shows the operating mode (c1, c2, c3) or
the setpoint value in m (at
2.
Adjust the setpoint by turning the operating knob (only
at p-c, p-v).
D D
8 Troubleshoot
8.1

Personnel requisition

The troubleshooting must only be performed by a qual-
ified specialist, work on the electrical connection must
only be performed by a qualified electrician.
8.2

Safety during troubleshooting

DANGER
Danger to life due to touch voltage after switching off
the pump.
◾ Disconnect all-pole power supply before starting work.
◾ Begin work at least 5 minutes after disconnecting the
power supply.
8.3

Error table

Fault Cause
Pump is not running Fuse protection
with switched-on defect.
power supply.
No voltage.
Pump makes Cavitation due to
noises. insufficient suction
pressure.
The structure is not Heat output of the
warm. heating surfaces
too low.
12
p-c, p-v).
D D
Correction
Check fuse.
Check voltage.
Increase system
pressure. Observe
permissible pres-
sure range.
Check the delivery
head and adjust
where necessary.
Increase setpoint.
Adjust operating
mode
p-c.
D
8.4

Fault signals

A signal is displayed.
◾
Failure LED lights up.
◾
◾ The SSM contact opens.
◾ Switch off the pump and try a restart at regular inter-
vals. During E10 switch off the pump permanently after
10 minutes.
No. Fault Cause
E04 Undervoltage Power supply on
mains side too low.
E05 Overvoltage Power supply on
mains side too
high.
E09 Turbine oper- Pump is operated
1)
ation backwards.
E10 Blocking Rotor blocked.
E21 Overload Slow motor.
2)
E23 Short-circuit Motor current too
high.
E25 Contacting/ Winding defective.
winding
E30 Excessive Interior of module
temperature of too warm.
module
E31 Excessive Ambient tempera-
power section ture too high.
temperature
E36 Electronics Electronics defec-
errors tive.
If a fault cannot be repaired, contact a qualified specialist
or customer service.
8.5 Warning signals
A signal is displayed.
◾
◾ Failure LED does not light up.
◾ The SSM contact does not open.
◾ The pump is running at reduced performance.
No. Fault Cause
E07 Generator Pump hydraulics is
operation perfused.
E11 Dry run Air in the pump.
E21 Overload Slow motor.
2)
only for pumps with P
1)
in addition on the LED display the error message LED
2)
shows a continuous red light.
Remedy
Check mains
voltage.
Check mains
voltage.
Check the flow
and install
non-return valve
if necessary.
Contact custom-
er service.
Contact custom-
er service.
Contact custom-
er service.
Contact custom-
er service.
Check operating
conditions.
Check operating
conditions.
Contact custom-
er service.
Remedy
Check unit.
Check liquid
pressure and
volume.
Check ambient
conditions.
≥ 200 W
1