GB - 13
30RHV
E N G L I S H
Diagnostics
The electronic control on the machine continuously monitors its
operation. In the event of a malfunction, it activates a relay whose
contact generates a coded alarm signal. Some alarm conditions are
automatically reset, others require the intervention of the operator to
search for the fault, remove its cause and switch the unit back on.
Manual resetting of alarm conditions
Manual resetting of alarm conditions is performed using the
remote ON/OFF button by simply switching OFF and then ON again
or opening and closing S1 switch (see electrical connections).
WARNING:
manual resetting causes the definitive loss of the alarm code;
therefore, before a manual reset, check the code according to the
instruction reported and remove its cause.
N.B.
Temporary power supply failure to a unit in an alarm condition does
not reset the unit.
Alarm
Description
Control
Alarm reset
Probable cause
code
action
method
1
Compressor fault
Compressor stopped Manual
Compressor overheated
2
Leaving water temperature
Unit stopped
Automatic
Sensor out of range, probe wire interruption
probe fault
or sensor fault
3
Entering water temperature
Unit stopped
Automatic
Sensor out of range, probe wire interruption
probe fault
or sensor fault
4
Defrost probe fault
Unit stopped
Automatic
Sensor out of range, probe wire interruption
or sensor fault
5
Air temperature probe fault
Unit stopped
Automatic
Sensor out of range, probe wire interruption
or sensor fault
6
High pressure transducer fault
Unit stopped
Automatic
Transducer out of range, incorrect transducer voltage
transducer wire interrupted or transducer fault
11
Low pressure transducer fault
Unit stopped
Automatic
Transducer out of range, incorrect transducer voltage
transducer wire interrupted or transducer fault
13
Low refrigerant pressure
Unit stopped
Automatic/
Lack of refrigerant in the circuit, blocked
in the circuit
Manual
refrigerant filter or low pressure transducer fault
14
High refrigerant pressure
Unit stopped
Manual
Fan fault, coil obstructed, high outdoor
in the circuit
air temperature
15
High pressure safety switch /
The safety pressure switch has not been reset after
reverse compressor rotation
Unit stopped
Manual
the last alarm, incorrect compressor connection
16
Plate exchanger
Unit stopped
Automatic/
Low water flow rate entering or leaving
anti-freeze protection
Manual
water probe fault
Repeated attainment of low
Low pressure transducer fault,
21
suction temperature in cooling
Unit stopped
Automatic
refrigerant filter blocked
(more than six times)
or lack of refrigerant in the circuit
22
Repeated attainment of high
High pressure transducer fault
pressure condition in cooling
Unit stopped
Automatic
high air temperature,
(more than six times)
high entering water temperature
23
Repeated attainment of high
Unit stopped
Automatic
Low water flow rate entering or leaving
discharge temperature in heating
water probe fault
24
Repeated attainment of low
Unit stopped
Automatic
Low pressure transducer fault, refrigerant filter
suction temperature in heating
blocked or lack of refrigerant in the circuit
25
Low entering water
Unit stopped
Automatic
Entering water temperature too low,
temperature in heating
entering or leaving water probe fault
26
Outdoor interblock fault
Unit stopped
Manual
Flowswitch tripped or fault, air in the water circuit
31
CCN emergency shut-down
Unit stopped
Automatic
Network control
32
Loss of communication with the The unit operates
Automatic
CCN bus wiring defect or
Flotronic or Chiller System Manager
in local mode
fault in the system
33
Maintenance service request
Unit stopped
Manual
–
The following list describes the possible cause for each alarm code:
