6.4 - Alarm codes (cont.)
Alarm
No.
Alarm
code
Alarm description Reset type Probable cause Action taken by the
control
Process faults (cont.)
33 P-29 Communication loss with the
System Manager
Automatic when communication is
re-established
Installation bus defective Unit goes into autonomous
mode
34 P-30 Communication loss between
master and slave
Automatic when communication is
re-established
Installation bus defective As above
35 MC-nn Master chiller 1 configuration error Automatic when the master
configuration returns to normal or
when the unit is no longer in master/
slave mode
Master/slave configuration error Master/slave mode is stopped
36 FC-n0 No factory configuration Automatic when the configuration is
entered
The unit size has not been
configured
Unit is shut down
37 FC-01 Illegal factory configuration number Manual The unit size has been configured
with the wrong value
As above
38 P-31 Network emergency stop Manual Network command As above
39 P-32 Fault water pump 1 Manual Pump overheating or poor pump
connection
Unit is completely stopped if
there is no emergency pump
40 P-33 Fault water pump 2 Manual As above As above
41 P-37 Repeated high pressure unloading,
circuit A
Automatic Transducer defective or fan circuit
fault
None
42 P-38 Repeated high pressure unloading,
circuit B
Automatic As above As above
43 P-40 Repeated low suction temperature
unloading in heating mode, circuit A
Manual Pressure sensor defective or
refrigerant charge too low
Circuit is shut down
44 P-41 Repeated low suction temperature
unloading in heating mode, circuit B
Manual As above As above
45 P-43 Heat exchanger temperature too low,
less than 10°C, prevents unit start-up
Automatic when the temperature
detected returns to normal or when
the mode returns to cooling
Operating compressor protection out
of range or pressure sensor fault
The unit cannot start
46 P-97 Reversed entering/leaving water
sensors
Manual Sensor defective, sensors reversed Unit is shut down
48 V0-xx Fault, variable fan speed controller,
circuit A
Manual or automatic Speed controller fault or alert Alert: The circuit continues to
operate, the speed controller
slows down the motor.
Alarm: The circuit shuts down.
49 V1-xx Fault, variable fan speed controller,
circuit B
As above As above As above
50 V3-xx Fault, variable water pump controller
51 Sr-00 Maintenance service alert Manual The preventive maintenance date
has passed
53 P62-2 Water loop control fault, missing
sensor calibration
Automatic if the calibration is valid No calibration
P62-3 Water loop control fault, suction
pressure too low
Automatic the first time, if the water
system is supplied with water, the
second time manual if it is the same
day
Too little water in the system Unit is shut down
P62-4 Water loop control fault, water pump
has not started
P62-5 Reserved
P62-6 Water loop control fault, water pump
overload
Automatic Missing pressure head at the water
pump
Unit is shut down
P62-7 Water loop control fault, water flow
rate fault
Manual Serious water leak, casse pompe Unit is shut down
P62-8 Water loop control fault, water
pressure sensors mixed up
Automatic Sensors mixed up Unit is shut down
54 P-63 High pressure fault in circuit A Manual Fan fault Circuit is shut down
55 P-64 High pressure fault in circuit B As above As above As above
56 P-99 Refrigerant leak detected Automatic Refrigerant leak or solvent present
in the machine atmosphere
No action
6 - DIAGNOSTICS - TROUBLESHOOTING
EREBA ACCESS EN - 24
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