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Troubleshooting
1.
Fault Finding Chart
WARNING: Before removingtheterminal box cover, make surethatthe electrical supply has been switched
offand that it cannot be aCcidentally switched on.
A
~~!~I:§~~::~:~,::::::::::::;::,~::::;~:~~:~~~::~~:~::: : ~~::~::;~;
'."L
I'alimentation electrique aetecoupee et ne peut etre retablie accidentellement.
AVERTISSEMENT: Le liquide pompe peut etre brQlant et sous haute pression. Avant de retirerou de
demonterla pompe, il faut drainer Ie systeme oufermer les deux robinets d'isolement lateraux de la pompeo
Single-Head Pumps with Standard or Protection Module
Fault
I
Cause
I
Remedy
One fuse
in
the installation
is blown.
Replace the fuse.
External circuit breaker is switched Swllch the circuit breaker
on.
off.
The pump does not run.
CurrenWoltage operated ground
None of the indicator lights are fault interrupter has tripped.
00.
The pump's internal therrnal over-
load swllch has cut out
( Standard module only).
Repair the insulation defects and reset the circuit breaker.
Check
that
the liquid
~
falls within
the
spedfied
range.
With external on/off changeover contact: The pump will
restart automatically
when it has
cooled to the normal tempera-
ture.
With external on/off Impulse contacts: The pump can
be
restarted when it has cooled to normal temperature.
The pump does not run.
The green indicator light is on.
Rotor blocked, but the pump hasn'
been
cut out
by the
thermal
overload
swllch.
The speed switch module has not
been fitted.
Swllch off the eleclricity supply and clean/repair the pump.
Swllch off the electricity supply at the external circuit breaker
and fit the speed switch module into position.
Three-Phase Pumps Only: The pump is running with the wrong Switch off the eleclricity supply at the external circuit breaker
The
pump
is
running.
The red and direction of rotation.
and interchange any
two
phases (leads) in the pump terminal
green indicator lights are on.
box.
The inlet pressure is too low.
Noise in the system. The green Air in the system.
indicator light is on.
The pump flow is too high.
The pressure is too high.
Noise in the pump. The green Air in the pump.
indicator light is on.
Vent the
system.
Reduce the pump performance.
Reduce the pump performance.
Vent the pump.
Increase the inlet pressure and/or check the air volume in the
expansion tank (if installed).
InsuffIcient heai in some places The pump performance is too low.
Increase the
pump
perforrnance, ifposslble,orrepiacethePlJl'lll
in the heating system.
with a pump with higher
flow.
Single phase pumps with protec-
tion module (only).
The pump has bee~ cut out by ~e
thermal overload switch due to high
The Pump does
not
run.
liquid temperature or blocked rotor.
The red indicator light is on.
Check that the liquid temperature falls within the specied
range.The pump wi" restart automatically when it has
cooled to
normal temperature.
Note: If the thermal overload switch
has
cut out
the
pump
three
times within a short period, the pump must
be
restarted manu-
ally by swllching off the electrical suply.
The green indicator light is off. The speed switch module has not Swllch off the electrical supply by means of the external mains
been
fitted.
swllch and fit the speed swllch module.
Page 10
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