FRIULAIR ACT ES 20-500, Руководство по обслуживанию пользователя и запасные части

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Maintenance, troubleshooting, spare parts and dismantling
ACT ES 20 – 500 29 – EN
8.2 Troubleshooting
Only qualified personnel should perform troubleshooting and or maintenance
operations.
Prior to performing any maintenance or service, be sure that :

no part of the machine is powered and that it cannot be connected to the mains
supply.

no part of the machine is under pressure and that it cannot be connected to the
compressed air system.

maintenance personnel have read and understand the safety and operation
instructions in this manual.
Before attempting any maintenance operation on the dryer, shut it down and wait at
least 30 minutes. Some components can reach high temperature during operation.
Avoid contact until system or component has dissipated heat.
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION
 The display of
DMC51 is not
lit
 Verify that the system is powered.
 Verify the electric wiring.
 If installed – HPS pressure switch has been activated – see specific point
 ACT ES 200-500 3phase - Blow of fuse (FU2 on the electric diagram) of the
auxiliary circuit - replace it and check the proper operation of the dryer.
 ACT ES 200-500 3phase – The remote control is OFF (see contact on terminals
1-2 on electric diagram)
 The
compressor
does not work.

If ESS=YES (see section 7.12.7) – the Dew Point displayed on DMC51 is
sufficiently low, the led is OFF, so the compressor is not active – wait that the
temperature becomes higher.
 Activation of the compressor internal thermal protection – wait 30 minutes and
then retry.
 Verify the electric wiring.
 If installed – the KC relay is faulty – replace it
 If installed – replace the internal thermal protection and/or the start-up relay and/or
the start-up capacitor and/or the working capacitor.
 DMC51 – The led is ON – see specific point.
 If the compressor still does not work, replace it.
 If ESS=YES
(see section
7.12.7) - The
compressor
remains OFF
unexpected
short time.

The OFF time of the compressor is related to the actual dryer thermal load. If dryer
is running in low or no-load conditions and at mild/low ambient temperatures, and
the compressor remains OFF for too short time (less than 3-5 minutes), check
which of the following reasons is creating the malfunction:
1. The DewPoint probe T1 doesn’t correctly detect the temperature - ensure the
sensor is pushed into the bottom of probe well.
2. The thermal insulation of DewPoint probe T1 is damaged – restore the thermal
insulation
3. The ambient temperature is too high or the room aeration is insufficient - provide
proper ventilation.
4. The solenoid valve EVL is not operating correctly - see specific point.
5. If installed - The check valve CHV is jammed (open) - replace it.
 The fan of the
condenser
does not work
 Verify the electric wiring.
 PV pressure switch is faulty - replace it.
 ACT ES 200-500 3phase - Blow of fuse (FU1-FU2 on the electric diagram) -
replace it and check the proper operation of the dryer.
 There is a leak in the refrigerant circuit – contact a refrigeration engineer.
 If the fan still does not work, replace it.