71
Maint
enanc
e
ARIANE
X
T
PL
US
ERROR
DESCRIPTION
1
14
Outdoor Sensor Damaged
4
20*
Bus supply overload
7
01
Zone1 Send Probe Damaged
7
02
Zone2 Send Probe Damaged
7
03
Zone3 Send Probe Damaged (N/A)
7
11
Zone1 Return Probe Damaged
7
12
Zone2 Return Probe Damaged
7
13
Zone3 Return Probe Damaged (N/A)
7
22
Zone2 Overheat
7
23
Zone3 Overheat
9
02
System fl ow sensor damaged
9
03
System return sensor damaged
9
10
HP communication error (RS 485)
9
23
Heating Circuit pressure Error
9
24
Communication error (e-BUS 2)
9
33
Overheat (>90°C)
9
34
DHW Tank sensor damaged
9
35
Tank overtemperature (>85°C)
9
36
Floor Thermostat 1 error (ST1)
9
37
No circulation error
9
38
Anode Fault
9
39
HP error
9
40
Hydraulic scheme not defi ned
9
41
Night tariff contact not defi ned
9
42
Load shedding contact not defi ned
9
44
Cooling overtemperature
9
45
Flow switch stuck
9
46
HP compressor error
2
P2
Thermal cleanse not complete
2
P3
DHW boost: comfort setpoint not reached
2
P4
fi rst thermostat of resistance (auto)
2
P5
second thermostat of resistance (manual)
2
P6
Night tariff contact not present
2
P7
Precirculation Error
2
P8
HP T° out of range
N/A = not applicable
(*) BUS power supply overload
A BUS power supply overload error may occur due to the connection
of three or more devices within the installed system. Devices which
may overload the BUS network include:
- Multizone module
- Solar pump assembly
- Module for instant production of domestic hot water
To avoid overloading the BUS power supply, set microswitch 1 on one
of the P.C.B.s inside the equipment connected to the system (except
the boiler) to OFF, as illustrated in the fi gure.
1
ON
OFF
2
microswitch
ERROR
(parameter
17.10.1)
DESCRIPTION
2 Safety
Input
3
Enter water Temperature Sensor
4
Actual Refrigerant Temperature Sensor (TR)
5
Outdoor Air Sensor of GMC
6
Loss communication to NUI control
7
NUI control Room Sensor
9
Flow Switch error / Water Pump
10
EEProm Corrupt
11
User interface setting mismatch
12
4 Way valve error
13
Loss Communication to RS485 (system confi -
guration type 6)
14
Loss of Signal From inverter board or High Tem-
perature Release
15
Exit water Temperature Sensor (LWT)
16
Alarm Test
17
Inverter Air Sensor (TO)
18
G-Tr inverter short circuit protection
20
Compressor position Detection Circuit error
21
Inverter Current Sensor error
22
Heat Exchanger Sensors (TE) / (TS)
23
Discharge Temperature Sensor (TD)
24
Outdoor Fan motor error
26
Other unit error
27
Compressor Lock
28
Discharge Temperature error
29
Compressor Breakdown
Table of error codes (PAC external unit)
In the case of an error on the external unit (PAC 939 error code), and
then read the parameter 17.10.1 refer to the following table to iden-
tify the cause of the error.
Restoring operation
If the system shuts down, a code will appear on the system interface
display signalling the type of shutdown and the reason behind it.
To restore normal operation, follow the instructions provided on the
display or, if the error persists, contact an authorised Technical Service
Centre for assistance.