UTEK FLAT 150 - Page 12

Troubleshooting
Fault
Causes Remedies
Insufcient air capacity and insufcient
pressure
a) Clogged pipelines and/or suction points
b) Clogged impeller
c) Overloaded lter
d) Insufcient rotation speed
e) Clogged heat exchanger
a) Pipelines and suction point cleaning
b) Impeller cleaning.
c) Filter cleaning or replacement
d) Supply voltage check if necessary, correct
e) Heat exchanger cleaning
Exchange air temperature
too cold
a) External air lower than to -5°C a) Employ of post-heating devices
Insufcient heat exchanger
performance
a) Exchange vanes are dirty a) Heat exchanger cleaning
Difcult start
a) Reduced supply voltage
b) Insufcient motor static torque
a) Check motor plate data
b) Close the air locks to reach full
speed if necessary, replace the motor
Performance drop after a period of
acceptable operation
a) Circuit leak before and/or after the fan
b) Damaged impeller
a) Circuit check and restoration of original
conditions
b)Check the impeller, if necessary replace through
an original spare part
Air pulsation
The fan capacity conditions are near
zero - ow instability, clogging or wrong
connection
Increase the min. speed on the electronic speed-
regulator (insufcient voltage)
Modify the circuit and/or replace the fan.
Clean and/or restore the suction duct
Excessive vibrations Rotating parts unbalance. Check the impeller balance: in case, restore or
replace it. Through an original spare-part.
Other troubleshooting for unit with CTR08 EVO PH/EVO D PH microprocessor control
Fault Causes Remedies
Fans alert Failure or objects blocking the fan Verify that anything blocks the functioning of the
fans: in the case, proceed with removal
Filters alert Clogged lters Replace the lters
Probes alert Failure Replace probes by technicians
CTR08 display/LED OFF Machine not powered Check the correct connection between the control
panel and electronic card
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