Maintenance, troubleshooting, spare parts and dismantling
48 – EN
ACT VS 800 - 2500
SYMPTOM
POSSIBLE CAUSE - SUGGESTED ACTION
Too
low
evaporating
pressure.
There is a gas refrigerant leak - contact a refrigeration engineer.
The evaporating pressure measured with DMC55 and BLP pressure transducer is not correct.
Please contact a refrigeration engineer to verify and compare the evaporating pressure value. If
required replace BLP pressure transducer and/or DMC55 controller.
HGBV electronic bypass valve is not working correctly - check the electric wiring of the valve or
contact a refrigeration engineer to replace it.
One or more EEVn Electronic Expansion Valves do not work properly - see specific fault.
Too
high
compressor outlet
temperature.
Excessive thermal load – restore operation nominal conditions
The inlet air is too hot - restore operation nominal conditions.
The room temperature is too high or the room air circulation is insufficient - provide proper
ventilation (air-cooled).
The condenser filter is dirty - clean it (air-cooled)
The fan does not work - see specific section (air-cooled).
There is a gas refrigerant leak - contact a refrigeration engineer.
One or more EEVn Electronic Expansion Valves do not work properly - see specific fault.
BT4 temperature probe does not detect the temperature correctly- check the electric wiring or
replace the probe
HGBV electronic bypass valve is not working correctly - check the electric wiring of the
valve or contact a refrigeration engineer to replace it.
Too
high
condensing
pressure
The room temperature is too high or the room air circulation is insufficient - provide proper
ventilation (air-cooled).
The inlet air is too hot - restore nominal conditions.
The inlet air flow rate is higher than the dryer’s - restore nominal conditions.
The condenser filter is dirty - clean it (air-cooled).
BHP pressure transducer faulty - Please contact a refrigeration engineer to verify and compare
the condensing pressure value. If they do not match replace the transducer.
The fan does not work - see specific fault (air-cooled).
The cooling water temperature is too hot – restore nominal conditions (water-cooled).
The cooling water flow is insufficient - restore nominal conditions (water-cooled).
Too
low
condensing
pressure
The room temperature is too low - restore nominal conditions (air-cooled).
Air flows through the condenser even with fan off – protect dryer against wind or external
air flows (not caused by dryer’s fan) (air-cooled).
The cooling water temperature is too low – restore nominal conditions (water-cooled).
Cooling water flow control valve needs recalibration - contact a technician to restore
nominal setting (water cooled).
BHP pressure transducer faulty - Please contact a refrigeration engineer to verify and
compare the condensing pressure value. If they do not match replace the transducer.
There is a gas refrigerant leak - contact a refrigeration engineer.
The fan does not work properly - the speed is too high - see specific fault (air-cooled).
The compressor doesn’t work– see specific section.
Summary of Contents for ACT VS 1000
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