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Fault
Difficult start
Airflow performance drop after a
period of
acceptable operation
Insufficient air capacity and insufficient
pressure
Heat Exchanger discharge air
temperature too low
Insufficient Heat Exchanger
performance
Air pulsation
Excessive vibrations
Other troubleshooting for unit with CTR08 / EVO PH / EVO D PH microprocessor control
Fault
Fan alert
Filter alert
Prob alert
CTR08 display/LED OFF
Troubleshooting
Causes
a) Reduced supply voltage
b) Insufficient motor static torque
a) Air leak before and/or after the fan
b) Damaged impeller
a) Clogged pipelines and/or
suction points
b) Clogged impeller
c) Overloaded filter
d) Insufficient rotation speed
e) Clogged heat exchanger
a) External air lower than to -5°C
a) Buid up of dirton Heat Exchange fins
The fan performance set too near
zero-flow causing instability, Clogged
or wrong ductwork connection
Rotating parts unbalance.
Causes
Fan Failure or objects blocking the fan
Clogged filters
Probe Failure
Machine not powered
Connection fault
14
Remedies
a) Check motor plate data
b) Close the air locks to reach full
speed. If necessary, replace the motor
a) Circuit check and restore to original
condition
b)Check impeller, If necessary, replace with
an original spare part
a) Clean pipelines and suction point cleaning
b) Clean impeller
c) Filter cleaning or replacement
d) Supply Voltage check and if necessary, correct
e) Clean Heat exchanger
a) Employ of post-heating devices
a) Clean Heat exchanger
Increase minimum speed on the electronic speed-
regulator (insufficient voltage)
Modify the circuit and/or replace the fan.
Clean and/or replace the suction duct
Check the impeller balance: in case, restore or
replace it. Through an original spare-part.
Remedies
Check for a fan blockage:
in the case of a failure, proced with removal/
replacement
Replace the filters
Arrange for service technicians to replace probes
Check for correct connection between the control
panel and electronic card
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