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5.3 THE FOLLOWING SYMPTOMS DO NOT
CONSTITUTE A PROBLEM FOR THE FAN
COIL.
Symptoms
The system does not work.
Changing to "FAN" mode during
cooling mode.
White fog is coming out of the
unit.
Fan coil cooling noise.
Dust is coming out of the unit.
The unit can give off a bad smell.
The fan does not turn.
• The fan coil does not start immediately after the ON/OFF key is pressed on the remote control.
If the operation LED flashes, the system is in normal condition.
• To prevent the internal evaporator from freezing, the system automatically changes to "FAN"
mode and then returns to cooling mode after a few moments.
• If the room temperature drops to the set-point, the indoor unit changes to "FAN" mode. The
same applies to the heating mode.
• When, during cooling, the humidity level is particularly high. If the inside of the indoor unit
is extremely obstructed, distribution of the temperature in the room becomes irregular. In this
case, the inside of the indoor unit needs cleaning. Call your dealer for more information. This
operation must be carried out by qualified staff.
• When the system is in cooling mode or is stopping, a low and continuous "hiss" can be heard.
This noise can be heard when the drain pump (optional accessory) is running.
• When the system stops after a heating operation, a sharp sound can be heard. This noise is
produced by the expansion and contraction of plastic parts caused by a variation in the tempe-
rature.
• A continuous and low "hiss" might be heard when the fan coil is running. This is caused by the
water flow.
• A low hiss might be heard when the unit is started or as soon as it has stopped: this is caused
by a variation in the water flow or it stopping.
• When the unit is used for the first time after a long time. This occurs because there is dust inside
the unit.
• The unit absorbs the smells of the rooms, furniture, cigarettes, etc. and re-emits them.
• During operation. The fan speed is controlled so as to optimise system operation.
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