Error Signals - ITT LOWARA Instrucciones De Uso

Electronic adjustment mode
Normal mode for
covering appr.
90% of homes
Factory-setting
Reduction of dif-
ferential pressure.
For systems with
low resistance.
Increase in dif-
ferential pressure.
For high pressure
systems such as
underfloor heat-
ing.
Fixed speed mode
1-4 speeds 1.
For small systems
and 4. For large
systems or venti-
lation.
5.3 SIGNALS
All EFLC pumps have 2 LED's on the terminal block
which act as status indicators. The green LED
shows the pump is powered. The red LED shows
a fault has occurred. Reset the pump by discon-
necting the power supply for 5 seconds and then
reconnecting it (fig. 5).
LED
No light
Greed light
Red light

5.3.1 Error signals

In case of a fault the red light at the back of the
terminal block indicates the type of error identi-
fied by the electronics.
The light flashes approximately for a certain
number of times every minute (see following
table for error descriptions).
Performance
automatically
controlled to
allow energy
saving and
increased
comfort if
the requested
flow is vari-
able.
Fixed speed
for systems
with constant
resistance.
DESCRIPTION
Power off
Normal operation
Error identified by
the electronics
Number
of flashes
1 Insufficient input voltage
2 Voltage surge
3 Instantaneous voltage surge
4 Internal fault
5 Continuous power overload
6 Overheating of electronics
7 Memory fault
8 Overheating of motor
9 Programme fault
5.3.2 Error relay
All EFLC pumps have an error relay. This relay has
both an NC and an NO connection (fig. 6).
6. MAINTENANCE
ATTENTION
nance or repair work, replace the O-ring
between the pump body and the delivery
pipe. When remounting the motor part,
make sure the O-ring is correctly inserted.
If the motor shaft is jammed following a long
period of inactivity or due to the build-up of im-
purities, it must be released. Fit a screwdriver
through the hole in the vent valve and into the
slot at the end of the shaft and turn.
N.B.: any work on the electrical components in-
side the pump must be performed by Lowara
technical staff.
Error
If the motor part is sep-
arated from the pump
body during mainte-
en
15