OPERATING AND MAINTENANCE MANUAL
Chapter 10 - Troubleshooting
iC 215 ÷ iC 780
66
The data in this manual are not binding and they can be modified by the manufacturer without notice.
Reproduction of this manual is strictly prohibited
ENGLISH
EN
E8
Incorrect rotation direction
of scroll compressor (three-
phase units only).
E8.1
Refrigerant is not
compressed and the unit
is unable to provide
cooling action.
Invert the position of two phase
wires of the power supply.
F
Low pressure switch (LP)
trips
Alarm displayed:
b(n)HP
F1
No refrigerant fluid in the
circuit
(see also A5).
F1.1
• Refrigerant compressor
stops;
• The text
b(n)LP
appears on
the display alternating with
value of
BTOWT
probe;
• General alarm relay
activation.
Call in a qualified refrigeration
engineer to check for leaks and
eliminate them.
Have the circuit charged by a
qualified refrigeration engineer.
F2
Unit upline filter, if present,
is fouled
F2.1
See F1.1.
Clean or renew the water inlet
filter, if installed.
G
Compressor protection trips
(iC 215÷540 models only).
Alarm displayed:
C(n)tr
G1
Thermal load too high with
insufficient refrigerant
charge in circuit (see also
A5).
G1.1
• The head and the body of the
compressor are very hot;
• The compressor stops and
attempts to restart after a
short time (even few
seconds);
• Compressor thermal
protection trips;
• Display shows message
C(n)tr
;
• LED of general alarm icon
illuminates.
Call in a qualified refrigeration
engineer to check for leaks and
eliminate them.
Have the circuit charged by a
qualified refrigeration engineer.
G2
Incorrect rotation direction
of scroll compressor (three-
phase units only).
G2.1
Refrigerant is not
compressed and the unit
is unable to provide
cooling action.
Invert the position of two phase
wires of the power supply.
H
Display blank and all LEDs
switched off with main
switch P1 set to ON (I).
H1
Control circuit fuse has
blown.
H1.1
Using a tester, no voltage
reading is obtained on the
transformer secondary
winding terminals.
Check the possible causes for
blowing of the fuse.
Change the fuse.
H2
Abnormal power
consumption by one or
more of the control board
components.
H2.1
Despite the presence of
power on the board
terminals the display
remains blank and the
LEDs remain off.
Try powering off the unit and
then powering it on again.
If this fails to solve the problem
contact an authorised service
centre.
I
Alarm displayed:
AP1÷AP6
I1
Probes damaged.
I1.1
• See problem;
• General alarm relay
activation.
Check that the temperature
probe is correctly connected to
the control board terminals and
that the cable is undamaged.
If necessary replace the
temperature probe.
PROBLEM
CAUSE
SYMPTOM
REMEDY