&MGPEVDU.5
9.10 Anomalies - Remedies
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Effect
Cause
Remedy
Feeble air discharge
Wrong speed setting on the control panel
Obstructed air filter
Obstruction of the airflow (inlet and/or outlet)
Air distribution system load loss has been underestimated
Sense of rotation inverted
Select the right speed on the control panel
Clean the air filter
Remove the obstruction
Increase fan speed
Check wiring diagram and electrical connections
Excessive air flow
Air distribution system pressure drop has been overestimated
Reduce fan rotation speed and/or create pressure drop in ducting
Insufficient static
pressure
Rotation speed too low
Sense of rotation inverted
Increase fan speed
Check wiring diagram and electrical connections
Excessive noise
Excessive air flow
Metal components damaged
Rotation parts off balance
Reduce air flow
Check state of components and replace damaged parts
Balance fan impeller
The motor/fan does
not work
Current lack
With water low temperature thermostat “TM” has tripped because
the temperature has dropped below 40°C (in winter mode)
Make sure that
Make sure that
Control the power supply
Control the boiler
The electrical power is on - Switches and/or thermostats are on the
right working position
No objects obstruct the fan rotation
The unit does not
heat up as before
Hot water supply lack
Wrong setting on control panel
Make sure that
Make sure that
Make sure that
Control the boiler and the hot water pump
See control panel settings
The air filter and the coil are clean
Air did not enter in the water circuit, check it using provided air vent
valve
The installation is well balanced - The boiler is functioning - The hot
water pump is functioning
The unit does not
cool up as before
Chilled water supply lack
Wrong setting on control panel
Make sure that
Make sure that
Make sure that
Control the chiller and the chilled water pump
See control panel settings
The air filter and the coil are clean
Air did not enter in the water circuit, check it using provided air vent
valve
The installation is well balanced - The chiller is functioning - The
chilled water pump is functioning
Water entrainment
Siphon is clogged
No siphon
Clean siphon
Fit a siphon
Condensate on the
external structure of
the unit
Temperature and humidity limit conditions (indicated in the Techni-
cal Bullettin - operating limits) have been reached
Condensate water draining problems
When the requested environment temperature is reached the fan
stops while chilled water is still circulating in the coil
Race the water termperature over the minimum limits mentioned in
the Technical Bulletin
Check the drain pan and the drain pipe
Provide a regulation where water supply is stopped when environ-
ment temperature is reached (fan stop) - (3 way valve – 2 way valve
– pump OFF – Chiller OFF, etc.)
Содержание ELFODuct MP 15
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