___________________________________________________________________________ 34 NT 1965 A - 03/2019
To stop the buzzer, press the down button on the control unit for 2 seconds.
Press ESC from an alarm page or wait 60 seconds without activity to return to the main page of the application.
Code
Alarm description
Reset
Check
AL01
Supply air fan thermal safety device (*²)
Auto
Check the supply air motor safety device
AL02
Return air fan thermal safety device (*²)
Auto
Check the return air motor safety device
AL03
Electric heater differential pressure switch(*²)
Manu
Insufficient flow rate on the electric heaters
AL04
Hot water coil frost protection
Auto
-
Open the hot water valve fully
-
Close the fresh air damper (FRESH air)
-
Stop the fans
AL05
High supply air temperature for resistor thermal safety device
Auto
Stop the heating resistors
AL06
Damper "Fully open" end position (FRESH air)
Manu
Check the open end position contact for the
dampers
Damper "Fully closed" end position (FRESH air)
Manu
Check the closed end position contact for the
dampers
AL07
Heating resistors thermal safety device for automatic reset
(95°)
Auto
Automatic overheating device
AL08
Heating resistors thermal safety device for manual reset
(120°)
Manu
Manual overheating device
AL09
Supply air fan operating hours
Manu (*¹)
Perform maintenance of the supply air fanCorrect
parameter PM02
AL10
Return air fan operating hours
Manu (*¹)
Perform maintenance of the return air fanCorrect
parameter PM03
AL11
Low supply air temperature (Winter)
Auto
Supply air temperature less than 5°C
AL12
High supply air temperature (Summer)
Auto
Supply air temperature greater than 40°C
AL13
Possibility of frost on exchanger
Auto
-
Flow imbalance
-
Preheater control
-
Opening of the by-pass
AL14
Supply air filter fouling
Auto (PE01=1)
Manu (*¹)
Change the supply air filter
Correct parameter PM05
AL15
Return filter fouling
Auto (PE01=1)
Manu*¹
Change the return air filter
Correct parameter PM06
AL16
Fire (*²)
Auto
See the specific function
AL17
Minimum supply air temperature limit (T s <
PA36
) (*²)
Auto
Supply air temperature less than PA36
AL18
Maximum supply air temperature limit (T s <
PA37
) (*²)
Auto
Supply air temperature greater than PA37
AL19
Schedule supply air filter change
Machine reset
Off or
Manu
Schedule the supply air filter change
AL20
Schedule return air filter change
Schedule the return air filter change
ERTC
RTC alarm failed or discharged
Manu
Prolonged appliance stop - off-site
back-up
ES01
Frost protection temperature sensor (*²)
Auto
Sensor connection
- Sensor value (see table below)
ES02
Supply air temperature sensor
Auto
Sensor connection
- Sensor value (see table below)
ES03
Return air temperature sensor
Auto
Sensor connection
- Sensor value (see table below)
ES04
Fresh air temperature sensor at inlet
Auto
Sensor connection
- Sensor value (see table below)
ES05
N/A
-
-
ES06
Auxiliary sensor [0-10V]
Auto
Sensor connection - DCV
sensor value)
