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 flow rate regulator of circuit
B
As above
As above
As above
50
V3-xx
Fault of pump regulator with variable flow
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 first
triggering in case the
circulating fluid 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 flow 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