ENGLISH
58 - Vers. 04/2019 Cod. 9828093300 00 -
19.3 TROUBLESHOOTING AND IMMEDIATE ACTIONS FOR DRYER
ALL WORKS MUST BE PERFORMED BY PROFESSIONALLY QUALIFIED PERSONNEL AND THE MACHINE MUST BE
SHUT DOWN AND ISOLATED FROM THE MAINS POWER AND THE COMPRESSED AIR DISTRIBUTION NETWORK
BEFORE ALL SERVICING OPERATIONS
N.B. OPERATIONS MARKED BY
◼
◼
MUST BE PERFORMED BY PROFESSIONALLY QUALIFIED PERSONNEL, AUTHORISED BY
THE MANUFACTURER.
PROBLEM ENCOUNTERED
POSSIBLE CAUSES
OBSERVATIONS
1)
There is no compressed air passing
through the dryer outlet.
1A)
The internal tubes are blocked by frost.
◼◼
The hot gas bypass valve is broken or
out of calibration.
- The ambient temperature is too low and
the evaporator tubes are blocked by
frost
2)
Presence of condensate in line
2A)
The water separator
doesn't work properly.
2B)
The dryer is working outside of its
operating range.
2C)
The dryer is working in
poor condensation conditions.
◼◼
-Check the
unloading solenoid
valve
◼◼
-Check the
unloading timer.
-Check the flow rate of the treated air.
-Check the ambient temperature.
-Check the air temperature at the dryer
inlet
-Clean the capacitor.
◼◼
-Check that the fan is working properly.
3)
Refrigeration compressor head very hot (>
55 °C) and the control board shuts it down
due to a high dryer temperature alarm
See
2B
See
2C
3A)
The cooling circuit is not working with
the right gas load.
◼◼
-Check for any refrigerant gas leaks.
◼◼
-Load again.
4)
The refrigeration compressor works
intermittently due to the intervention of the
Klixon protector.
See
2B
See
2C
See
3A
5)
The refrigeration compressor hums and
won't start
The line voltage is too low.
The refrigeration compressor starter
system is faulty.
-Contact your electrical energy supplier
company.
-Wait a few minutes for the machine to
restart.
◼◼
-Check relays and running and starter
capacitors (When included).
6)
The dryer has stopped and won't start even
after a few minutes’ delay.
The thermal relay has tripped:
See cases
2B-2C-3A
The motor has blown.
7)
The refrigeration compressor is very noisy Problems with internal mechanical parts
or valves.
PART “B”
THIS PART
“B”
OF THE INSTRUCTION MANUAL IS RESERVED TO PROFESSIONALLY QUALIFIED PERSONNEL,
AUTHORISED BY THE MANUFACTURER.
IVR MODELS: THE CAPACITORS INSIDE THE INVERTER MAY REMAIN LIVE FOR 15 MINUTES (VARIABLE SPEED) AFTER THE MACHINE
HAS BEEN DISCONNECTED FROM THE MAINS POWER.
WAIT AT LEAST 15 MINUTES (VARIABLE SPEED) AFTER ISOLATING THE SUPPLY VOLTAGE BEFORE PERFORMING SERVICING
OPERATIONS OR REPAIRS TO AVOID THE RISK OF DEATH OR SERIOUS INJURY.
