ICP iDRY iRDP CT 100, Инструкция по установке и эксплуатации

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Maintenance, troubleshooting, spare parts and dismantling
36 iDRY iRDP CT 20-500

The alarm (toC),
- ON/OFF cycles of the
compressor too
frequent –
has been triggered

If ESS=YES (see section 8.12.7) - The refrigerating compressor must remain ON for
a minimum time (approx. 6 minutes) within which, if necessary, DMC51 will activate
the solenoid EVH that enables the operation of the hot gas by-pass valve. To avoid
freezing, if the DewPoint drops too low in despite the hot gas by-pass valve is in
operation, the compressor is switched OFF before its minimum ON time (approx. 6
minutes). If this happens too many times the alarm
(TOC) is activated to avoid
damaging the compressor.

Check which of the following reasons has caused the alarm:
1. The inlet air is too cold – restore the nominal conditions.
2. The ambient temperature is too low - restore the nominal conditions.
3. The hot gas bypass valve is out of setting – contact a ICP service technician to
restore nominal setting.
4. The solenoid valve EVH is not operating correctly - see specific point.

The alarm (ICE)
has been triggered

Check which of the following reasons has caused the alarm:
1. The inlet air is too cold – restore the nominal conditions.
2. The ambient temperature is too low - restore the nominal conditions.
3. 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.

DMC51 - The LED
is ON or flashing

With LED flashing: one or more alarms are active and the display shows
and the active alarms.

With LED lit: one or more alarms are waiting to be reset and the display shows
and the alarms that are no longer active but not yet reset.

The alarms are displayed by the following messages:
1. : LP - LPS pressure switch activated (low pressure) – see specific paragraph.
2. : Hdt - Compressor discharge temperature too high (probe T2) – see specific
paragraph.
3. : ICE - Temperature inside the exchanger too low (probe T1) – the dew point is
too low – see specific paragraph.
4. : toC – ON/OFF cycles of the compressor too frequent – Compressor has been
repeatedly switched OFF before its minimum ON time (approx. 6 minutes) - see
specific paragraph.
5. : PF1 - Failure temperature probe T1 (DewPoint) – verify electric wiring and/or
replace probe.
6. : PF2 – Failure temperature probe T2 (compressor outlet) – If probe T2 installed :
verify electric wiring and/or replace probe; If probe T2 not installed : verify electric
wiring and/or replace the resistor R.
NOTE: after solving the problem, the alarms must be reset (simultaneously press
the
Set + buttons for three seconds).

DMC51 - The LED
is ON or flashing

With LED flashing, one or more service warnings are active.

With LED lit: one or more service warnings are waiting to be reset. The display
shows the dew point temperature and the active or not reset service warning.

The service warnings are displayed by the following messages:
1. : Hdp - Dew point too high (higher than the set HdS value) – see specific
paragraph.
2. : Ldp - Dew point too low – see specific paragraph.
3. : SrV - Service - maintenance notification time expired (parameter SrV) – carry
out the scheduled maintenance and reset the hour meter.
NOTE: after solving the problem, the service warnings must be reset
(simultaneously press the
Set + buttons for three seconds) .