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AD800E-STD.EN-06 - Subject to change without notice
TFT DryAir
Troubleshooting
Sympton
Possible causes
How to act
Reducing dehumidification
capacity
clogged filters
obstructed steam coil
steam valve doesn’t open
lack of steam flow
reduced air flow rates
the rotor is stationary
internal air leaks
insufficient reactivation air
air leaks
clean or replace the filters
check the reactivation coil
verify the correct operation of the valve
check the operating pressure of the steam, the
adduction valves, the condensate drain
check the dampers
check the belt tension
check the seals
check the reactivation coil
check the seals and the panels
Burned main fuses
malfunctioning of fans
airflow is too high
the rotor is stationary
malfunction of reactivation coil
check fans and motors
check the flow rates and the dampers
check the engine and the belt
check the reactivation coil
The dehumidifier will not start
control circuit
control signal
the power supply phases
fuses for control malfunction
check the fuses
check the external signal to start-stop
check the main fuses and the phase sequence
check the electrical components
The rotor is stationary
slippage of the belt
broken belt
off-axis rotor
malfunction of the gear motor
check tension
replace the belt
check the position of the rotor on the central
support
replace the gear motor
Low process or reactivation airflow
clogged filers
malfunctioning fans
phases of electrical power
the ducts are blocked
clean or replace the filters
check the fan motors and impellers
check the main fuses and the phase sequence
control dampers and pipelines
