Maintenance, troubleshooting, spare parts and dismantling
ACT VS 3000 - 6000
EN - 41
Contact a refrigeration engineer to verify and compare the correct evaporating pressure
value. If required replace BLP pressure transducer and/or DMC50 controller.
One or more Electronic Expansion Valve EEV doesn't work properly - see specific point.
◆
Dew Point too low
NOTE: Slightly negative DewPoint peaks are normal with low loads and refrigerant
compressor cycling ON/OFF
The fan is always on
– verify the correct operation pressure transducer (see BHP on the
electric diagram)
– (Air-Cooled).
Ambient temperature is too low - restore nominal conditions (Air-Cooled).
Evaporating pressure measured with DMC50 and BLP pressure transducer is not correct.
Contact a refrigeration engineer to verify and compare the correct evaporating pressure
value. If required replace BLP pressure transducer and/or DMC50 controller
The DewPoint probe doesn’t correctly detect the temperature - ensure the sensor is
pushed into the bottom of probe well.
◆
Excessive
pressure drop
within the dryer.
The dryer doesn’t drain the condensate - see specific point.
The DewPoint is too low - the condensate is frost and blocks the air - see specific point.
Check for throttling the flexible connection hoses.
Check heat exchanger cleaning and prefilter installation.
◆
The dryer doesn
’t
drain the
condensate
The condensate drain service valve is closed - open it.
Verify the electric wiring.
The DewPoint is too low - the condensate is frost and blocks the air - see specific point.
Inlet compressed air pressure is too low and condensate is not drained
– restore nominal
conditions.
Electronic drainer is not operating correctly (see section 10.16).
◆
The dryer
continuously
drains
condensate.
Electronic drainer is dirty (see section 10.16).
◆
Water within the
line.
Verify that the air inlet and outlet connections are correctly connected to the compressed air
system (not reversed connection).
The dryer doesn't start - see specific point.
If installed
- Untreated air flows through the by-pass unit - close the by-pass.
The dryer doesn’t drain the condensate - see specific point.
DewPoint too high - see specific point.
◆
HPS high
pressure switch
has been
activated.
Check which of the following has caused the activation:
1. The ambient temperature is too high or the room aeration is insufficient - provide proper
ventilation (Air-Cooled).
2. The condenser is dirty - clean it (Air-Cooled).
3. Check HPS electrical wiring.
4.
The condenser fan doesn’t work - see specific point (Air-Cooled).
5. The cooling water is too hot - restore nominal conditions (Water-Cooled).
6. The cooling water flow is insufficient - restore nominal conditions (Water-Cooled).
Reset the pressure switch pressing the button on the controller itself - verify the dryer for
correct operation.
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
HPS pressure switch is faulty - contact a refrigeration engineer to replace it.
◆
LPS low pressure
switch has been
activated.
Check LPS electrical wiring.
There is a leak in the refrigerating fluid circuit - contact a refrigeration engineer.
The pressure switch reset automatically when normal conditions are restored - check the
proper operation of the dryer.
Evaporating pressure measured with DMC50 and BLP pressure transducer is not correct.
Contact a refrigeration engineer to verify and compare the correct evaporating pressure
value. If required replace BLP pressure transducer and/or DMC50 controller
