Troubleshooting; Troubleshooting Table - Vasco NINA FC75 Manuel D'utilisation

TROUBLESHOOTING

TABLE
EFFECT
Ventilation takes a long time to
start when new temperature
settings or anew mode is
activated.
The device doesn't start
ventilating.
Ventilation does not start even if
there is hot or cold water in the
hydraulic circuit.
The device leaks water
when heating.
Rust is forming on the front panel.
Water droplets are forming
on the grill and the air outlet.
The device leaks water
only when cooling.
The device makes excessive
noise.

12 TROUBLESHOOTING TABLE

CAUSE
The circuit valve needs time to
open and to let cold or hot water
circulate.
No hot or cold water in the system.
The hydraulic valve stays closed.
The fan motor is blocked or
burned out.
The microswitch that stops venti-
lation when opening the filter grill
doesn't close properly.
Electrical connections are incorrect.
Water leakage from the system
plumbing.
Leaks from the valve group.
Thermal isolators detached.
In situations of high humidity
(>60%) condensation could form,
especially at the minimum
ventilation speeds.
The condensation tank is blocked.
The condensation drain does not
have sufficient incline to drain.
The connection pipes and valve
group are not well isolated.
The fan touches the structure.
The fan is unbalanced.
Check for dirt in filters and if
necessary, clean them.
Wait 2 or 3 minutes for the circuit
valve to open.
Check that the boiler or the water
cooler are working.
Disassemble the valve body and
check and restore water circulation.
Check that the valve is working by
powering it up separately from a
230V supply. If it starts working, the
problem may be with the electronic
controller.
Check the motor windings and
that the fan can turn freely.
Check that closing the grill closes
the contact on the microswitch.
Check the electrical connections.
Check for leaks and tighten all
connections.
Check the seals
Check that the thermal sound
isolators are positioned correctly,
paying particular attention to the
one positioned at the front above
the winged battery.
As soon as relative humidity
decreases, the problem will disap-
pear. In any case, should some
water droplets fall inside the units,
it does not mean that there is a
malfunction.
Slowly pour a bottle of water in
the lower part of the battery to
check drainage; if required, clean
the tank and/or improve the
incline of the drain tube.
Check pipe insulation.
Check for dirt in filters and if
necessary, clean them.
An unbalanced fan causes ex-
cessive vibrations in the machine:
replace the fan.
Clean the filters.