Maintenance, troubleshooting, spare parts and dismantling
40
– EN
ACT VS 3000 - 6000
Prior to carrying out maintenance works at the dryer, switch it off main switch (control panel pos.1) and
wait for at least 30 minutes.
Caution!
Hot surfaces!
During operation, several components can reach surface temperatures of more than +60°C. There is the
risk of burns.
All components concerned are installed inside of the closed housing. The housing must only be opened
by certified skilled personnel.
Some components can reach high temperatures during operation. Avoid any contact until the system or
the component has cooled down.
SYMPTOM
POSSIBLE CAUSE - SUGGESTED ACTION
◆
The dryer doesn't
start.
Verify that the system is powered.
Verify the electric wiring.
Blow of fuse (see FU1/FU2/FU3 on the electric diagram) of the auxiliary circuit - replace it
and check the proper operation of the dryer.
Verify that dryer is in local mode.
Electronic controller DMC50 in alarm condition
– see the corresponding point.
◆
The compressor
doesn’t work.
The Dew Point displayed on DMC50 is sufficiently low, so the compressor is not active
–
wait that the temperature becomes higher
Verify the electric wiring.
Electronic controller DMC50 in alarm condition
– see the corresponding point.
Check that the compressor contactor (KC1) and/or circuit breaker (QC1) properly work.
If the compressor still doesn’t work, replace it and/or its variable speed drive.
◆
Condenser
’s fan
doesn
’t work
properly (Air-
Cooled).
The condensing pressure (HP) measured is sufficiently low, so the fan is not active
– wait that the
condensing pressure becomes higher.
Verify the electric wiring.
Electronic controller DMC50 in alarm condition
– see the corresponding point.
If the fan still doesn't work, replace it and/or its variable speed drive.
Condensing pressure measured with DMC50 and BHP pressure transducer is not correct.
Contact a refrigeration engineer to verify and compare the correct condensing pressure
value. If required replace BHP pressure transducer and/or DMC50 controller
◆
DewPoint too
high.
The dryer doesn't start - see specific point.
The DewPoint probe doesn’t correctly detect the temperature - ensure the sensor is
pushed into the bottom of probe well.
Failure temperature probe BT1
– check the electrical cabling and/or replace the probe.
The Compressor doesn’t work - see specific point.
The ambient temperature is too high or the room aeration is insufficient - provide proper
ventilation (Air-Cooled).
The inlet air is too hot - restore nominal conditions.
The inlet air pressure is too low - restore nominal conditions.
The inlet air flow rate is higher than the rate of the dryer - reduce the flow rate - restore
nominal conditions.
The condenser is dirty - clean it (Air-Cooled)
The condenser fan doesn’t work - see specific point (Air-Cooled).
The cooling water is too hot - restore nominal conditions (Water-Cooled).
The cooling water flow is insufficient - restore nominal conditions (Water-Cooled).
The dryer doesn’t drain the condensate - see specific point.
There is a leak in the refrigerant circuit - contact a refrigeration engineer. In case of
refrigerant leak, dewpoint could be high, compressor runs at low speed and does not stop
even at no load and low ambient, BT3 (refrigerant compressor suction) temperature is high
and condensing pressure is low.
Evaporating pressure measured with DMC50 and BLP pressure transducer is not correct.
