___________________________________________________________________________ NT 1965 A - 03/201925
•
4: Via supervisor control
7.10
FIRE ALARM INPUT
When the electrical circuit is closed at this input, fire mode activates and the fans stop.
The alarm is triggered immediately and resets automatically.
7.11
LANGUAGE
The control can be set to several languages according to parameter
PH90
•
PH90 = 0: English
•
PH90 = 1: Italian
•
PH90 = 2: French
•
PH90 = 3: Portuguese
7.12
SAFETY/PROTECTION
7.12.1
HEAT EXCHANGER FROST PROTECTION
The heat exchanger is protected against the risk of frost by the following means (depending on the machine model):
•
Offsetting the air flow rates
•
Preheater control (if installed)
•
Exchanger BY-PASS opening (if installed)
•
Motorised damper closure
7.12.2
ERP SAFETY ON ELECTRIC HEATER
Machines fitted with electric heaters are compliant with ERP regulations. They are fitted with the following protective
devices:
•
Pre-ventilation
•
Post-ventilation
•
Automatic overheating 80°C on temperature sensor
•
Automatic overheating 95°C, electric control cut
•
Manual overheating 120°C, electric heater power cut
•
Air flow rate
7.12.3
FILTER FOULING MONITORING
The PowerBox® Ready recovery unit manages filter fouling via a differential pressure switch. When this switch is
triggered, a filter fouling fault message is sent
One of the following fault messages is displayed:
•
AL14=> Supply air filter fouling
•
AL15 => Return air filter fouling
7.12.4
WEEKLY FILTER FOULING TEST
The control device is equipped with an automatic filter verification function. If the function is configured (parameter
PE02
), the ventilation unit is started at maximum speed at 3 pm on Wednesday each week for a period of 3 minutes
(modifiable via parameter
PE03, PE04 and PE05)
to check the fouling condition of the filters.
If the filter is clogged and the pressure switch sends a signal to the controller, a fault message will be displayed (
AL19,
AL20
). The message is displayed. The alarm is signalled after a configurable delay (parameter
PA29
) and manually reset
without a buzzer.
Note.
If the RTC system clock is incorrect, this function is deactivated.