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2VV.
Creating innovative solutions for you and your business since 1995.
ver.8 07-12-19
8. MAINTENANCE
8. MAINTENANCE
11 mm
Indication on
regulation box
On controller
- service LED Signalization
Meaning
0
1
2
3
4
5
6
A
E
F
.
blinking
blinking
blinking
blinking
blinking
blinking
blinking
off
off
lights
off
Communication
error
Overheating
pre-heater
Fan fail
Error sensor
preheating
Error sensor
suction
Error sensor
exhaust
Error sensor
inlet
Antifreeze
protection of
recuperator
Protection
against
freezing of
the external
water heat
exchanger.
Filters
check
Normal
Please check a cable connection
between control panel and unit. If
communication is lost unit goes into
the Stand-by mode.
If the preheating temperature
exceeds limit 120 ° C, unit turns off
preheating, turns off
both fans and goes into a state where
it is not possible to restore operation
only by turning off and on a main po-
wer switch. Please check that supply
ventilator works correctly.
Find out the reason of fan fail: overhe-
ating due faulty bearings, short circuit,
increased power consumption, small
fan load (idling) ...
Unless you find and solve the cause of
overheating do not
switch on the unit. Make sure that
cable to the thermo-contact of the fan
is not interrupted or fan motor is not
overheated.
Find out the possible reason for blown
fuse and replace the fuse.
Sensor is disconnected or damaged.
Please check connection of sensor.
If connection is ok.
Sensor is disconnected or damaged.
Unit turns off preheating, turns
off both fans and goes into a state
where it is not possible to restore
operation only by turning off and
on a main power switch. Please
check connection of sensor. If
connection is ok.
Sensor is disconnected or damaged.
Please check connection of sensor.
If connection is ok.
Sensor is disconnected or damaged.
Please check connection of sensor.
If connection is ok.
Informative without intervention
for user
Informative without intervention
for user
Replace filters and press a button for
reset filters
In normal state is the LED shown
8.2 PErIODICAL CLEANING
OF THE vENTILATION UNIT
We suggest regular inspections of the ventilation unit in the in-
terval that must be adjusted depending on current conditions.
In case the unit is not in operation for a longer period of time, we
suggest activation of the unit for 1 hour operation at least every
six months.
ATTENTION
Service of internal components and cleaning of the unit
must be carried out by professional service shop only!
Operation of the unit without the filter is not allowed! Other-
wise the heat exchanger can be damaged!!!
For this maintenance it is always necessary to remove unit from
the working position - there is a risk of injury.
Disassembly of the unit only in exceptional cases!!!
Clean the ventilation unit, using a vacuum-cleaner, small brush,
cloth and soapy water especially recuperator. Do not clean the
unit with following: Sharp objects, aggressive chemicals, sol-
vents, abrasive cleaning products, pressured water, pressured air
or steam.
8.2. ErrOr SIGNALIZATION
Error signalization can be found on multi-segment display loca-
ted on the regulation box.
DO NOT MISS!
When there is an error or fail signalised, we recommend
to contact a service company.
