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Troubleshooting
Fault
Difficult star
Performance drop after a period of
acceptable operation
Insufficient air capacity and insufficien
pressure
Exchange air temperature
too cold
Insufficient heat exchange
performance
Air pulsation
Excessive vibrations
Other troubleshooting for unit with microprocessor control EVO PH/EVO D PH
Fault
Fans alert
Filters alert
Probes alert
Display/LED OFF
Communication error
(KO communication)
www.jakkagroup.com
Troubleshooting
Causes
a) Reduced supply voltage
b) Insufficient motor static torqu
a) Circuit leak before and/or after the fan
b) Damaged impeller
a) Clogged pipelines and/or suction points
b) Clogged impeller
c) Overloaded filte
d) Insufficient rotation spee
e) Clogged heat exchanger
External air lower than to -5°C
Exchange vanes are dirty
The fan capacity conditions are near
zero - flow instabilit , clogging or wrong
connection
Rotating parts unbalance.
Causes
Failure or objects blocking the fan
Clogged filter
Failure
Machine not powered
Error in the wiring of the remote panel
JR(H/V)(B)70
Remedies
a) Check motor plate data
b) Close the air locks to reach full
speed if necessary, replace the motor
a) Circuit check and restoration of original
conditions
b)Check the impeller, if necessary replace through
an original spare part
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
Employ of post-heating devices
Heat exchanger cleaning
Increase the min. speed on the electronic speed-
regulator (insufficient voltage
Modify the circuit and/or replace the fan.
Clean and/or restore the suction duct
Check the impeller balance: in case, restore or
replace it. Through an original spare-part.
Remedies
Verify that anything blocks the functioning of the
fans: in the case, proceed with removal
Replace the filter
Replace probes by technicians
Check the correct connection between the control
panel and electronic card
Make the electrical connections following the
instructions in the wiring diagram
10
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