Malfunctioning - Ariston VLS Flat 50 Technical Manual

Volatile errors
(the appliance is able
to work powering on
only one HE at a time
and HE1 has the
priority; if the error
disappears, the
appliance resumes
normal operation)

4.2 Malfunctioning

Power missing to the appliance due to:
- no power from mains (could be check by the end user, too)
network is not well-working, contact the power mains technical service;
- power missing to the PCB (could be check by the end user, too)
switched off, switch on it pressing the ON/OFF button;
Info missing - bad placed or damaged wirings
(the button connect/replace it.
HMI or the LCD Power missing to the button HMI or to the LCD display due to:
display is - bad connection of wirings
switched off) interface is not well connected, place it in the right position;
- bad placed or damaged wirings
the interface is disconnected/damaged, connect/replace it;
- PCB break
Button HMI or LCD display broken due to:
- faulty component
From the pipe due to:
- wrong pipe tightening
out from it, restore the connection.
From the tank flange due to:
- wrong flange tightening
Water leakage
tightening;
- damaged gasket
From the safety valve due to:
- drainage pipe missing
during/after the heating phase; if the drainage pipe is missing, place it;
installation;
E14 - bad placed or damaged wiring
disconnected/damaged, connect/replace it;
HE2 probe short/open circuit due to:
- bad placed or damaged wiring/faulty component
E20
disconnected or faulty (sensor/s values not in compliance with "Sensor
Test Table"), connect/replace it.
High difference of temperature measured by higher and lower sensors into
the inlet tank due to:
- HE2 probe incorrect positioning
E23
the HE2 sheath, place it in the right position;
- HE2 sensor/s out of tune
compliance with "Sensor Test Table"), replace it.
Low heating rate concerning the inlet tank due to:
- incorrect appliance horizontal installation
right, dismount the product from the wall and make the proper
installation;
E24
- bad placed or damaged wiring
disconnected/damaged, connect/replace it;
- faulty component
fastons is not in compliance with the nominal value (R ~ 53 Ω), replace it.
Instruction for competent and skilled technical workers
if the PCB is damaged, replace it.
if the HMI is damaged, replace it.
if the component is broken, replace it.
if the red power cable is
if the component is faulty (values not in
if the blue power cable is
if the ohmic resistance value between the HE2
if the power cable is disconnected/damaged,
if the communication cable between the PCB and the
if the communication cable between the PCB and
if the inlet/outlet pipe is bad connected and water comes
if water comes out from the flange, check the flange bolts
a drip of water by the device should be considered normal
16
if the component is
if the component is not entirely into
if the water pipes are on the
if the home power
if the appliance is