WDE
46
EN/36B/08.2018 © STULZ SpA – all rights reserved
Alarm: dirty filter
Air filter is clogged
Replace the filter
Clogged filter pressure switch faulty
Contact Stulz service
Wrong setting of clogged filter pressure switch
Contact Stulz service
Pipes to the clogged filter pressure switch clogged
or bended
Clean and re-position plastic pipes
Alarm: air flow (evap-
orator fans without
tachometric signal)
Evaporator fan broken
Contact Stulz service
Fan cables disconnected
Contact Stulz service
Air flow pressure switch faulty
Contact Stulz service
Wrong setting of air flow switch
Contact Stulz service
Pipes to the air flow switch clogged or bended
Clean and re-position plastic pipes
Alarm: evaporator fan
x blocked (evaporator
fans with tachometric
signal)
Evaporator fan broken
Contact Stulz service
Fan cables disconnected
Contact Stulz service
Wrong configuration of number of fans on C2020
Contact Stulz service
Alarm: component x
thermic
Anomalous absorbed current by component x
Contact Stulz service
Defective protection
Contact Stulz service
Alarm: LAN failure
Missing LAN cable
Connect units in LAN with a suitable cable
LAN cable is not pin-to-pin
Replace it with a pin-to-pin cable
Wrong setting of sequencing jumpers
Contact Stulz service
Wrong setting of sequencing parameters
Contact Stulz service
Sequencing part of C2020 controller is damaged
Contact Stulz service
10. Uninstalling and disposal of the
unit
This unit must be uninstalled by specialized and authorized persons.
ATTENTION
This unit contains refrigerant and a small quantity of lubricant (ester) inside its compressor.
These substances are dangerous for the environment and must not be dispersed in it.
Refrigerants containing fluorocarbons contribute to global warming and consequently to climate
changes. They must be disposed of in accordance with disposal standards or they must be
delivered to firms qualified as specialized waste disposal firms.
DANGER
Cut off power supply. Switch off power conducting cables to the unit and secure them against
being switched on again. Disconnect the A/C unit from the de-energized network.
Move the unit as described in paragraph “lifting and transport”, with a lifting device of suitable
capacity.
The following are the instructions for proper disposal of the unit during the various phases of its life.
For further clarification or additional information, please contact [email protected].
