ICS iC 535 - Water Differential Pressure Switch Alarm Troubleshooting

OPERATING AND MAINTENANCE MANUAL
Chapter 10 - Troubleshooting
iC 215 ÷ iC 780
63
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
C
The water differential
pressure switch FLOW or
level sensor alarm trips.
Alarm displayed:
AEFL
C1
Unit upline filter, if present,
is clogged.
C1.1
• Water flow is irregular.
Pressure difference between
inlet and outlet below
25mbar;
• The text AEFL appears on
the display;
• General alarm relay
activation.
Clean the filter upline from the
unit, if installed.
Perform the alarm reset
procedure to restart the unit (see
Chapter 7 “Electronic
controller”).
C2
The pump does not work or
rotates in the opposite
direction (three-phase
power supply).
C2.1
• See C1.1;
• General alarm relay
activation.
Check the pump electrical
supply and, if necessary, invert
two of the phases.
Perform the alarm reset
procedure to restart the unit (see
Chapter 7 “Electronic
controller”).
C3
Water inlet-outlet inverted
(units without hydraulic
kit).
C3.1
• See C1.1;
• General alarm relay
activation.
Invert water inlet and outlet.
Perform the alarm reset
procedure to restart the unit (see
Chapter 7 “Electronic
controller”).
C4
The storage tank has not
been bled correctly.
C4.1
• The text AEFL appears on
the display;
• General alarm relay
activation.
Bleed the storage tank via the
relative bleed valve.
PROBLEM CAUSE SYMPTOM REMEDY