Riello NXC 021 - Alarm Code Listings and Descriptions

99
Alarm codes
EN
Alarm
number
Alarm code Alarm description Reset mode Probable cause Control system reaction
Thermistor faults
49 V1-xx Faultofvariableowrateregulatorofcircuit
B
As above As above As above
50 V3-xx Faultofpumpregulatorwithvariableow
rate
51 Sr-00 Warning for maintenance service Manual Scheduled
maintenancedatehas
beenexceeded
53 P62-2 Hydroniccircuitcontrolfault,sensorhasnot
beencalibrated
Automatic,incaseofvalid
calibration
Calibrationnotcarried
out
Alarm
number
Alarm code Alarm description Reset mode Probable cause Control system reaction
Thermistor faults
P62-3 Hydroniccircuitcontrolfault,suction
pressureistoolow
Automaticfortherst
triggering in case the
circulatinguidiswater,
manualforthesecond
triggeringoccurredinthesame
day
Lowwaterlevelinthe
systemhydroniccircuit
Unit stop
P62-4 Hydroniccircuitcontrolfault,pumpfailed
to start
P62-5 Reserved
P62-6 Hydroniccircuitcontrolfault,overloadof
circulation pump
Automatic Differential pressure
toolowfromthepump
Unit stop
P62-7 Hydroniccircuitcontrolfault,nowaterow Manual Bigwaterleakage,
pump fault
Unit stop
P62-8 Hydroniccircuitcontrolfault,waterpressure
sensorexchange
Automatic Water pressure sensor
exchange
Unit stop
54 P-63 High pressure fault of circuit A Manual Fan fault Stop of the circuit
55 P-64 High pressure fault of circuit B As above As above As above
56 P-99 Refrigerantleakagedetection Automatic Refrigerantleakage
or solvent vapours
present in the
atmospherewherethe
deviceisinstalled
None