Description Of The Alarm Signals - Riello NexPolar Series Installation And Technical Service Instructions

DESCRIPTION OF THE ALARM SIGNALS

7 DESCRIPTION OF THE ALARM SIGNALS
The following tables include lists of alarm signals, together with the probable causes, the effects upon the unit, and the reset type.
Current alarm
alarm alarm
[P346] -
[P344] [P345]
[P349]
- - 1
- - 2
- - 3
- - 4
- - 5
- - 6
- - 7
- - 8
- - 9
100 6 10
102 8 11
103 - 12
104 - 13
108 - 14
109 - 15
111 - 16
119 13 17
- - 20
- - 21
221 - 22
- - 23
- - 24
Description Unit status
EWT sensor
Continuous
malfunction
LWT sensor
Stopped
malfunction
Inverter liquid
Compressor Cpr stop
malfunction (TR)
OAT sensor
Continuous
malfunction
DHW TT sensor
Guasto ACS
malfunction
Inverter liquid
CHWSTEMP
IAT sensor
Continuous
malfunction
Malfunctions
UI internal Continuous
temperature
Spare sensor
Continuous
malfunction
Inverter discharge
temperature sensor Cpr stop
malfunction (TD)
Inverter liquid
compressor
Cpr stop
protection
malfunction (TE)
Inverter liquid
compressor sensor Cpr stop
(TL) malfunction
Inverter TO sensor
Continuous
malfunction
Inverter suction
temperature sensor Cpr stop
malfunction (TS)
Inverter compressor
temperature Cpr stop
malfunction
Inverter TE and TS
sensors connected Cpr stop
incorrectly
Inverter suction
pressure sensor Cpr stop
malfunction (PS)
Loss of
communication Continuous
with user interface
Loss of
communication Cpr stop
with inverter
Communication
error between Cpr stop
inverter boards
Loss of
communication Continuous
with slave units
Loss of
communication Stopped
with master unit
reset type
automatic Cycle
X
X
X
X
X
X
X
X
X
This error becomes definitive
X after 4 attempts to complete
the operation.
This error becomes definitive
X after 4 attempts to complete
the operation.
This error becomes definitive
X after 4 attempts to complete
the operation.
The unit continues to function
in emergency mode.
The sensor's value is fixed at
30°C in cooling mode, and 10°C
X
in heating mode
The emergency mode is
cancelled when any other value
is detected by the TO sensor.
This error becomes definitive
X after 4 attempts to complete
the operation.
This error becomes definitive
X after 8 attempts to complete
the operation.
This error becomes definitive
X after 4 attempts to complete
the operation.
This error becomes definitive
after 2 attempts to complete
X the disconnect detection
operation, and 4 attempts to
detect high pressure.
When a new message is
X
received by the user interface
When a new message is
X
received by the user interface
X Simple communication delay.
X
X
58
assessment and measurement
Comment
1. Check the EWT sensor (EWT).
2. Check the NHC board.
1. Check the LWT sensor (LWT).
2. Check the NHC board.
1. Check the TR sensor (TR).
2. Check the NHC board.
1. Check the auxiliary OAT sensor
(OAT).
2. Check the NHC board.
1. Check the DHW sensor (DHW).
2. Check the NHC board.
1. Check the CHWSTEMP sensor
(CHWSTEMP).
2. Check the NHC board.
1. Check the IAT sensor (IAT).
2. Check the NHC board.
1. Check the UI internal
temperature sensor.
2. Check the NHC board.
1. Check the spare sensor.
2. Check the NHC board.
1. Check the discharge temperature
sensor (TD).
1. Check the temperature sensor
(TE).
1. Check the temperature sensor
(TL).
1. Check the external temperature
sensor (TO).
1. Check the suction temperature
sensor (TS).
1. Check the fan's proper
operation.
1. Check the temperature sensor
(TE, TS).
1. Check the suction pressure
sensor (LP).