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11. Ricerca guasti / How to detected failures / Búsqueda de averías / Störungssuche
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WARNING! BEFORE TO ACCESS THE UNIT, CUT OUT THE POWER SUPPLY TO THE UNIT USING THE OMNIPOLAR SWITCH.
FOR ANOMALIES DON'T HESITATE, CONTACT THE AFTERSALES SERVICE IMMEDIATELY.
FAILURE
Feeble air discharge
Excessive air flow
Insufficient static pressure
Excessive noise
The motor/fan
does not work
The unit does not heat
up as before
The unit does not cool
up as before
Water entrainment
Condensate on the
external structure
of the unit
GB
POSSIBLE CAUSES – CHECKS - REMEDIES
- Wrong speed setting on the control panel: Select the right speed on the control panel
- Obstructed air filter: Clean the air filter
- Obstruction of the airflow (inlet and/or outlet): Remove the obstruction
- Air distribution system load loss has been underestimated: Increase fan speed
- Sense of rotation inverted: Chech wiring diagram and electrical connections
- Motor's condenser exhausted: replace the condenser
- Air distribution system load loss has been overestimated: Reduce fan rotation speed and/or create
load loss in ducting
- Rotation speed too low: Increase fan speed
- Sense of rotation inverted: Chech wiring diagram and electrical connections
- Motor's condenser exhausted: replace the condenser
- Air distribution system underestimated pressure loss: Increase rotation speed of the fan and / or
modify / enlarge the air ducts
- Air flow too high: Reduce air flow
- Metal components damaged: Check state of components and replace damaged parts
- Rotation parts off balance: Balance fan impeller
- Current lack: Control the power supply
- With water low temperature thermostat "TM" has tripped because the temperature has dropped
below 40°C (in winter mode): Control the boiler
- Make sure that: The electrical power is on - Switches and/or thermostats are on the right working
position
- Make sure that: No objects obstruct the fan rotation
- Motor's condenser exhausted: replace the condenser
- Hot water supply lack: Control the boiler and the hot water pump
- Wrong setting on control panel: See control panel settings
- Make sure that: The air filter and the coil are clean
- Make sure that: Air did not enter in the hydraulic circuit, check it using provided air vent valve
- Make sure that: The installation is well balanced - The boiler is functioning - The hot water pump is
functioning
- Chilled water supply lack: Control the chiller and the chilled water pump
- Wrong setting on control panel: See control panel settings
- Make sure that: The air filter and the coil are clean
- Make sure that: Air did not enter in the hydraulic circuit, check it using provided air vent valve
- Make sure that: The installation is well balanced - The chiller is functioning - The chilled water pump
is functioning
- Siphon is clogged: Clean siphon - No siphon: Fit a siphon
- Condensate water draining problems: check the drain pan and the drain pipe
- Sharp air flow deviation (= big change/increase of the air speed) in correspondence of the condensate
drain pan due to air-intake duct with sharp deviations/obstructions/etc.: change the air duct.
- Temperature and humidity limit conditions (indicated in the Technical Bullettin - operating limits)
have been reached: Race the water termperature over the minimum limits mentioned in the Techni-
cal Bulletin
- Condensate water draining problems: check the drain pan and the drain pipe
- When the requested environment temperature is reached the fan stops while chilled water is still
circulating in the coil: provide a regulation where water supply is stopped when environment tempe-
rature is reached (fan stop) - (3 way valve – 2 way valve – pump OFF – Chiller OFF, etc.)
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