ICP iDRY iRDP CT 100, Instructions For Installation And Operation Manual

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Maintenance, troubleshooting, spare parts and dismantling
34 iDRY iRDP CT 20-500

Dew point too high.

The compressor does not work – see specific point.

The DewPoint probe T1 doesn’t correctly detect the temperature - ensure the sensor
is pushed into the bottom of probe well.

The ambient temperature is too high or the room aeration is insufficient - provide
proper ventilation.

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.

The condenser fan does not work – see specific point.

The dryer does not drain the condensate – see specific point.

If ESS=NO (see section 8.12.7) – The hot gas bypass valve is out of setting – contact a ICP
service technician to restore nominal setting.

If ESS=YES (see section 8.12.7) – DewPoint on this type of dryer is fluctuating (the
compressor turns ON and OFF) and for some periods can reach values higher than normal
- wait for the compressor start and the DewPoint will drop to lower temperature.

The solenoid valve EVL is not operating correctly - see specific point.

There is a leak in the refrigerant circuit – contact a ICP service technician.

Dew point too low
with parameter
ESS=NO
(see section 8.12.7)

The fan is always ON – verify the electric wiring, check the setting of PV pressure switch or
PV pressure switch is faulty – contact a ICP service technician to replace it.

The ambient temperature is too low – restore nominal conditions.

The hot gas bypass valve is out of setting – contact a ICP service technician to restore
nominal setting.

Dew point too low
with parameter
ESS=YES
(see section 8.12.7)

DewPoint on this type of dryer is fluctuating (the compressor turns ON and OFF) and
for some periods can reach values lower than normal - wait until the DewPoint rise to
normal temperature.

The refrigerating compressor is always ON, even though the led is OFF – verify
the electric wiring or KC relay (if installed) is faulty – replace it.

Excessive pressure
drop within the dryer.

The dryer does not drain the condensate – see specific point.

The dew point is too low – the condensate is frozen and blocks the air – see specific point.

If ESS=YES (see section 8.12.7) – The DewPoint probe T1 doesn’t correctly detect the
temperature and the condensate freeze– ensure the sensor is pushed into the bottom
of probe well.

Check for throttling the flexible connection hoses.

The dryer does not
drain the condensate.

The condensate drain service valve is closed – open it.

Verify the electric wiring.

The dew point is too low – the condensate is frozen and blocks the air – see specific point.

The iMAT condensate drain does not work correctly (see iMAT MANUAL).

Inlet compressed air pressure is too low and the condensate is not drained – restore
nominal conditions

The dryer continuously
drains the condensate.

Please read the separate iMAT installation and operating instructions.

Water within the line.

If installed - untreated air flows through the bypass unit – close the bypass.

The dryer does not drain condensate – see specific point.

Dew point too high – see specific point.

The compressed air pipeline downstream of the dryer are located at a very low ambient
temperature and the remaining humidity in the compressed air is condensing: is required to
review the plant compressed air distribution system.

If ESS=YES (see section 8.12.7) – DewPoint on this type of dryer is fluctuating (the
compressor turns ON and OFF). In low ambient temperature condition (winter season) the
remaining humidity in the compressed air is condensing. Set ESS=NO (see section 8.12.7)