Saunier Duval MURALES SDH 12-025NW Notice D'utilisation page 94

11- TROUBLESHOOTING
SYMPTOMS
Excessive or inexistent
cooling or heating (for
units that operate in
cooling mode)
POSSIBLE CAUSES
The air inlet or outlet on the indoor
or outdoor unit is obstructed.
The three-minute compressor is
activated for protection.
When running in DRY mode there is
no air flow.
When running in HEAT mode there is
no air flow.
22
POSSIBLE SOLUTION
Remove the objects causing the
obstruction.
Wait and it will operate again.
At times, when in DRY mode, the
airflow stops to avoid excessive
cooling.
In HEAT mode the air does
not flow until it is hot enough,
thereby avoiding a jet of cold
air. For the same reason, the air
stream may not be variable.