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Alarm codes
EN
6.1 ALARM MENU
The
Pro-
panel features many troubleshooting
functions. In case of error, an alarm will be triggered and
its identification code will be logged into the alarm menu,
CUR_ALRM and ALARMRST sub-menus.
The control panel LEDs will signal the alarms. It is reminded
that:
• flashing LED indicates that at least one circuit of the
machine is in operation but there is a warning situation.
• steady LED indicates that at least one circuit of the machi-
ne has stopped due to an error.
ALARMRST sub-menu shows up to five alarm codes active
within the unit.
6.3 ALARM CODES
Alarm
number
Alarm code Alarm description
Reset mode
Probable cause
Control system reaction
Thermistor faults
1
th-01
Heat exchanger entering water temperature
sensor fault
Automatic, when the
temperature detected is back
to normal again
Thermistor fault
Unit stop
2
th-02
Heat exchanger leaving water temperature
sensor fault
As above
As above
As above
3
th-03
Defrost fault of cooling circuit A
As above
As above
Stop of the circuit if the device is
in heating mode
4
th-04
Defrost fault of circuit B or second fault of
circuit B sensor
As above
As above
As above
5
th-10
Outdoor temperature sensor fault
As above
As above
Unit stop
6
th-11
CHWS sensor fault
(Master/Slave)
As above
As above
Stop of the Master/Slave operation
mode
7
th-12
Circuit A suction sensor fault
As above
As above
Stop of the circuit
8
th-13
Circuit B suction sensor fault
As above
As above
As above
9
th-44
Fault of suction sensor, heat exchanger 1
As above
As above
As above
10
th-45
Fault of suction sensor, heat exchanger 2
As above
As above
As above
Pressure transducer faults
11
Pr-01
Delivery pressure transducer A fault
Automatic, when voltage is
back to normal
Transducer fault or
installation error
Stop of the circuit
12
Pr-02
Delivery pressure transducer B fault
As above
As above
As above
13
Pr-04
Circuit A suction pressure transducer fault
As above
As above
As above
14
Pr-05
Circuit B suction pressure transducer fault
As above
As above
As above
51
Pr-24
Pressure sensor fault at water inlet
Automatic, when the value of
the voltage transmitted by the
sensor is back to normal
Sensor fault or
installation error
Stop of the circuit
52
Pr-25
Pressure sensor fault at water outlet
As above
As above
As above
Communication with slave boards
15
CO-BB
Communication loss with NRCP2 board
Automatic, when
communications have been
restored
Communication bus
installation error or
slave board fault
Compressor A3 or circuit B stop,
according to configuration
16
Co-ht
Communication loss with the board for
additional heating steps
As above
As above
Stop of additional heating steps
17
Co-e1
Communication loss with EXV valve board
As above
As above
Unit stop
18
Co-o1
Communication loss with PD-AUX 1 board
As above
As above
Device stop if equipped with
optional water pressure sensor
6.2 ALARM RESET
Once
the
error
is
solved,
the
alarm
code
must
be
reset.
Reset
procedure
can
be manual or automatic, depending on the type of code of
alarm.
Alarm
reset
can
be
carried
out
al-
so with machine running. In case of power blackout
the unit will automatically restart without the enabling re-
quest from the control panel.
Nevertheless, if the machine, during this interruption, regi-
sters
some alarms, they can inhibit the automatic restart.
The manual reset procedure of the alarms must be carried
out from the ALARMRST menu, RST_ALM parameter. However,
access to this parameter can be protected by a password (that
can be configured from the GENCONF menu).
