Troubleshooting - Xylem Lowara EPE2 16 Installation And Operating Instructions Manual

Troubleshooting

Malfunction
No display
on the control
panel
The displays on
the control panel
are shining, but
the boiler is
heating
The temperature
in the on-site
heating system is
too low.
The boiler heat-
ing output is too
weak.
Cause
Unit is disconnected
Fault current circuit breaker
switch has triggered.
Fault current circuit breaker
switch has triggered yet again.
Fuse in the control panel is faulty
Error in the power supply
Air in the system, the LED
control display 'Venting boiler'
shines red.
STb has triggered.
STb has triggered yet again.
The thermostat is faulty.
The heating rod is faulty.
The circulation pump does not
work.
The air in the system prevents
circulation.
A phase is missing in the mains
power supply.
Error in the power supply.
Thermostat is faulty.
The heating rod is faulty.
Remedy
♦ Switch the unit on.
♦ Reset the fault current circuit
breaker switch.
♦ Arrange for an electrician to check
the cause for a faulty fuse before
working with the unit.
♦ Arrange for an electrician to check
the fuse in the control panel.
♦ Arrange for an electrician to check
the cause for a faulty fuse before
working with the unit.
♦ Arrange for an electrician to check
the on-site power supply.
♦ Close the intake and return ball
cocks.
♦ Vent the unit.
♦ Reset the safety temperature
limiter.
♦ Arrange for an electrician to iden-
tify the cause.
♦ Arrange for an electrician to check
the thermostat and replace if neces-
sary.
♦ Arrange for an electrician to check
the thermostat and replace if neces-
sary.
♦ Start the pump mechanically.
♦ Arrange for an electrician to check
the pump and replace if necessary.
♦ Close the intake and return ball
cocks.
♦ Vent the unit.
♦ Check the control lamp 'U<'.
♦ Arrange for an electrician to check
the on-site power supply.
♦ Arrange for an electrician to check
the thermostat and replace if neces-
sary.
♦ Arrange for an electrician to check
the heating rod and replace if neces-
sary.
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