___________________________________________________________________________ NT 1965 A - 03/201933
9
TROUBLESHOOTING
NB
•
Before starting maintenance, service or repair operations, and whilst these are in progress, the unit must be
disconnected from the power supply and locked, and the service switch must be in position 0 (off).
•
Do not undertake any repairs if you are unsure about or unfamiliar with the exact procedure to follow; in this
case, contact a specialised service. Before starting and during operations
Before contacting the after-sales service centre, perform the following simple checks.
They can help
you save time and avoid unnecessary call costs.
9.1
COMMON PROBLEMS
The recovery unit is not working at all.
•
Check that the appliance is switched on then start it up.
•
Check whether the circuit breaker is closed
Machine OFF via on/off
•
Check the state of the contact
Machine OFF by fault
•
Check the alarm table below and acknowledge
Machine OFF by supervisor
•
CMS mode selected, see corresponding installer menu (parameter PM06)
The temperature is not adjusted
•
Set the supply or return air temperature
•
Check the operation of heating mode (electrical)
The recovery unit does not work in reheating mode.
•
Check the electric heater safety devices
No heating at recovery unit supply.
•
Check that the set temperature is higher/lower than the current temperature.
•
Check if you have selected heating mode
•
Check that all windows and doors are closed
•
It takes about three minutes to begin heating at the outlets
•
Check that the heater control relays are engaged
The fan speed is not set.
•
In AUTO mode, the fan speed is selected automatically according to an installer
configuration (see relevant configuration)
There is an odour in the room during operation
•
Check whether you are using the recovery unit in a smoky area or in a location where
there is an odour
•
Check the condition of the heater (Clean the heater)
•
Air the room or select ventilation mode for 1 to 2 hours.
The machine indicates a fault but is still operating
•
Non-blocking fault, see the faults below
The recovery unit is making an unusual noise,
vibration
•
Check that the fans are properly tightened
•
Originating from the air flow gap crossing the recovery unit (see networks)
Water is dripping from the unit.
•
Check the condensate outflow
•
Water can form due to the temperature difference
The control unit remains at "checking"
•
Check the wiring of the control unit
•
Check the CANBUS
Insufficient flow rate
•
Check the condition of the filters, clean them more regularly.
•
Check that no object is obstructing the air flow, remove any obstruction.
•
Check the outlets are unobstructed
9.2
ALARMS
When the machine is in a fault state, you can view the different faults. The buzzer sounds automatically. It is possible
to deactivate the buzzer so that it no longer activates automatically. To do this, change the value of parameter
PH20
in the installer menu/other parameters menu.
It is possible to view the different faults by selecting the ALARMS menu from the general menu, or also by pressing
ESC from the main page and then select “
Show ALARMS >>”.
To scroll through the different alarms, press the ENTER button: the alarms will be shown in order of priority, as they
are listed in the table of alarms.
