Technical data

Maintenance, troubleshooting, spare parts and dismantling
ACT 600 – 5000 35 – EN
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION
 Electronic
instrument
DMC24
The led
is
on or flashes.
 With
led flashing : one or more alarms are active and the display shows
and the active alarms.
 With
led lighted : 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and the alarms that are no longer active but not yet reset.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 with the following messages :
1.
: HP - HPS pressure switch tripped (refrigerant high pressure) for condensing
pressure too high - see specific paragraph (NOTE : when problem is solved press
reset key on HPS pressure switch).
2.
: LP - LPS pressure switch tripped (low pressure) due to refrigerant pressure
too low - see specific paragraph.
3. : Con – during first startup – power phases of compressor are not
connected properly (see RPP on the electric diagram) – Change rotating direction
swapping two phases of the power supply of dryer. These changes have to be
done only by a qualified electrician. DO NOT BY PASS RPP PROTECTION: BY
OPERATING THE MACHINE IN WRONG ROTATING DIRECTION, THE
COMPRESSOR WILL FAIL IMMEDIATELY AND THE WARRANTY WILL BE
VOIDED.
4.
: Con – one phase of power supply of dryer is missing (see RPP on the
electric diagram) – restore the missing phase.
5. : Con – Reverse Phase Protector (RPP) is faulty – replace it.
6.
: Con – electric protection of compressor tripped (see Q1/QC1 on the electric
diagram)– reset and verify the dryer’s proper operation.
7.
: Con - if installed - thermal protection inside the compressor tripped (see
MC1 on wiring diagram – wait 30 minutes and try again.
8. : FAn - electric protection of fan tripped (see QV1 on the electric diagram) -
reset and verify the dryer’s proper operation (Air-Cooled).
9.
: FAn – thermal protection inside the fan/s tripped (see MF on wiring diagram
– wait 30 minutes and try again (Air-Cooled).
10.
: Hdt – compressor discharge temperature protection tripped due to very
high temperature (probe T4) – see specific paragraph.
11. : ICE – temperature inside exchanger (probe T1) too low – DewPoint is
too low - see specific paragraph.
12.
: LCP - condensing pressure too low – see specific paragraph.
13.
: PF4 – failure temperature probe T4 (compressor discharge) – verify
electric wiring and/or replace probe.
14.
: PFP – failure pressure transducer BHP (condensing pressure) – verify
electric wiring and/or replace transducer.
NOTE: after solving the problem, the alarms must be reset (press the keys
log
reset
simultaneously for 3 seconds).