ENGLISH
Code 9828093379 ed 00 05/2020 47
19.2 TROUBLE-SHOOTING AND EMERGENCY REMEDIES FOR DRYER
ALL WORK MUST BE CARRIED OUT BY PROFESSIONALLY SKILLED PERSONNEL. BEFORE CARRYNG OUT ANY
MAINTENANCE JOBS IT IS MANDATORY TO STOP THE MACHINE AND DISCONNECT IT FROM THE POWER
SUPPLY.
N.B. OPERATIONS MARKED
◼
◼
MUST BE CARRIED OUT BY PROFESSIONALLY SKILLED PERSONNEL
AUTHORISED BY THE MANUFACTURER
FAULT FOUND
POSSIBLE CAUSES
OBSERVATIONS
1)
No compressed air passes through
the dryer outlet
1A)
The pipes are frozen inside
◼◼
-The bypass valve of the hot gas
is broken or out-of-calibration
-The room temperature is too low
and the evaporators piping are
obstructed with ice
2)
Presence of condensate in the
pipings.
2A)
The condensate separator does
not work correctly
2B)
The dryer is working outside its
rating
2C)
The dryer is working under bad
conditions of condensation
◼◼
-Check the solenoid exhaust valve
◼◼
-Check the drainage timer
-Check the flow rate of treated air
-Check the room temperature
-Check the air temperature at the
drier inlet.
-Clean the condenser.
◼◼
-Check the good operation of the
fan.
3)
The compressor head is very hot
(> 55 °C)
Make reference to
2B
Make reference to
2C
3A)
The cooling circuit is not working
with the right gas charge
◼◼
-Check if there are leaks of
refrigerating gas.
◼◼
- Charge it again.
4)
Motor cuts out on overload
Make reference to
2B
Make reference to
2C
Make reference to
3A
5)
The motor hums and does not start.
The line voltage is too low.
You switched the machine off and
on again without leaving enough
time for the pressure balancing.
The starting system of the motor is
defective.
-Contact the electric power
company
-Wait a few minutes before starting
the machine again.
◼◼
-Check the running and starting
relays and condensers (if any)
6)
The compressor is very noisy.
Troubles with the internal
mechanical parts or with the valves
