User Manual

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Troubleshooting .
Alarm codes on the control panel:
The buzzer can be stopped or reset by pressing one of the following keys:
, or
Code
Condition under
which the error
occurs
Cause
Consequences Repair
Err
03
Water temperature
sensor in the pocket
faulty
 Sensor cut out or
shorted
 No heating
 High-pressure safety device
activated (Err 25)
 Check the connections or replace the
sensor wiring
Err
06
Anti-corrosion connection
shorted
 Wiring or anti-
corrosion anode
shorted
 Anti-corrosion protection
deactivated, risk of corrosion.
 Check the wiring connections
 Replace the wiring and/or the anti-
corrosion wiring
Err
07
Anti-corrosion connection
broken
 No water in the tank or
anti-corrosion wiring
cut
 No heating
 Put water in the tank
 Replace the wiring and/or the anti-
corrosion wiring
Err
09
Water temperature too
high
(> 80°C)
 Electric resistor
charged permanently
 3 HS sensor
 Risk of triggering the mechanical
safety device
 No heating
 Check the connections and the position of
sensor 3
 Check that the electric backup is not
permanently working
 Reset the mechanical safety device if
necessary and contact your reseller
Err
21
Measured temperature
outside the limits
 Temperature sensor
(air inlet) cut out or
shorted
 Operating ranges not respected
 AUTO mode: heating with the
electric backup
 ECO mode: no heating
 Check the connections or replace the
sensor wiring
Err
22
Evaporator temperature
sensor faulty
 Sensor cut out or
shorted
 Hot gas valve fault
 Fan fault
 Defrost function compromised
 Risk of damage to the compressor
 AUTO mode: heating with the
electric backup
 ECO mode: no heating
 Check the connections or replace the
sensor wiring
 Check that the fan and the hot gas valve
are in good working order
Err
24
Measured temperature
outside the limits
 Air temperature
outside the operating
range.
 Heat pump working outside the
range
 AUTO mode: heating with the
electric backup
 ECO mode: no heating
 Install the water heater according to the
recommendations in the manual
 Check the FAN setting (see page 15)
 Check the connections and the position of
sensor 1
Err
25
Pressure switch alarm
(high pressure fault)
 High pressure value
too high
 Compressor power supply failure
 AUTO mode: heating with the
electric backup
 ECO mode: no heating
 Check that the air temperature has not
exceeded 35°C
 Press the mode key to clear this fault.
Contact your reseller.
Err
28
Defrost malfunction
 Shortage of fluid
 Hot gas valve fault
 Defrost function does not work and
the evaporator is obstructed
 AUTO mode: heating with the
electric backup
 ECO mode: no heating
 Check the activation of the hot gas valve
in installer mode
 Check that the fan is in good working
order
 Press the mode key to clear this fault.
Contact your reseller.
Err
30
Heat pump works for
more than 50h without
stopping
 Heat pump fault
 Shortage of fluid
 Compressor fault
 Heating time is too long
 Risk of shortage of hot water
 AUTO mode: heating with the
electric backup
 ECO mode: no heating
 Contact your reseller