OPERATING AND MAINTENANCE MANUAL
Chapter 10 - Troubleshooting
iC 215 ÷ iC 780
67
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
EN
ENGLISH
J
Alarm displayed:
b(n)Ac
J1
Low water outlet
temperature.
The value set in the relative
parameter is lower than the
value measured by the
probe.
J1.1
• See problem;
• Compressor stops and then
restarts;
• General alarm relay
activation;
• LED of general alarm icon
illuminates.
Identify and remedy the
problem that caused
BEWOT
temperature to fall to a value
below
AL26
.
J2
Water flow rate too low.
J2.1
• See problem;
• Compressor stops and then
restarts;
• General alarm relay
activation.
Increase the water flow rate.
K
Alarm displayed:
AtE1/AtE2
pump thermal cutout.
K1
The pump thermal cutout
has tripped because the
water flow rate was too
high.
K1.1
• See problem;
• General alarm relay
activation;
• Refrigerant compressor and
pump stop;
• The display shows the
message
AtE1/AtE2
alternating with the value of
the
BTWOT
probe;
• Pressure difference read on
the pressure gauge with
pump running and pump
stopped is lower than the
available pressure head with
pump maximum flow rate.
Reset thermal cutout.
Increase hydraulic circuit
pressure drop by partially
closing, for example, a pump
outlet cock.
K2
The grille through which
the pump cooling air flows
is obstructed.
K2.1
• See problem;
• General alarm relay
activation;
• Refrigerant compressor and
pump stop.
Reset thermal cutout.
Remove obstruction from
grille.
K3
Pump malfunctioning.
K3.1
• See problem;
• General alarm relay
activation;
• Refrigerant compressor and
pump stop;
• Pump current input higher
than nominal value;
• Pump noise levels may be
anomalous.
Reset thermal cutout.
Renew pump.
L
Alarm
ACFx
L1
Configuration error.
L1.1
Code
ACFx
flashing on
display and unit shuts
down.
Power off the unit and then
power it on again.
If this doesn’t solve the
problem, contact the nearest
service centre.
M
Alarm
AEE
M1
Processor is not saving data
correctly.
M1.1
• Unit not working;
• Code
AEE
flashing on
display;
• LED of general alarm icon
illuminates.
Power off the unit and then
power it on again.
If this doesn’t solve the
problem, contact the nearest
service centre.
PROBLEM
CAUSE
SYMPTOM
REMEDY