Danfoss BW10 020-090, Operation Instructions Manual

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6.4 - Alarm codes (cont.)
Alarm No. Alarm
code
Alarm description Reset type Probable cause Action taken by the control
Process faults (cont.)
42 P-30 Communicaiton loss between master
and slave Automatic when communication is
re-established CCN installation bus defective Unit goes into autonomous mode
43 P-31 CCN emergency stop As above Network command As above
44 P-37 Repeated high-pressure unloading,
circuit A Automatic Transducer defective or fan circuit
fault None
45 P-38 Repeated high-pressure unloading,
circuit B As above As above As above
46 P-40 Repeated low suction temperature
unloading Manual Pressure sensor defective or
refrigerant charge too low Circuit is shut down
47 P-41 Repeated low suction temperature
unloading As above As above As above
48 P-43 Temperature at heat exchanger too
low, less than 10°C prevents unit
start-up Automatic if 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
49 MC-nn Master chiller 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
50 FC-n0 No factory configuration Automatic when the configuration is
entered The unit size has not been configured Unit is shut down
51 FC-01 Illegal factory configuration number Manual The unit size has been configured
with the wrong value As above
52 Sr-00 Maintenance service alert Manual The preventive maintenance date
has passed
53 V3-xx Fault, variable evaporator water
pump controller Automatic Fault in the variable speed controller Unit is shut down
54 V4-xx Fault, variable condenser water
pump controller As above As above As above
55 P62-2 Evaporator water loop control fault,
missing sensor calibration Automatic if the calibration is valid No calibration As above
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 Manual Pump fault As above
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, pump faulty Unit is shut down
P62-8 Water loop control fault, water
pressure sensors mixed up Automatic Sensors mixed up Unit is shut down
56 P61-2 Evaporator water loop control fault,
missing sensor calibration Automatic if the calibration is valid No calibration As above
P61-3 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
P61-4 Water loop control fault, water pump
has not started Manual Pump fault As above
P61-5 Reserved
P61-6 Water loop control fault, water pump
overload Automatic Missing pressure head at the water
pump Unit is shut down
P61-7 Water loop control fault, water flow
rate fault Manual Serious water leak, pump faulty Unit is shut down
P61-8 Water loop control fault, water
pressure sensors mixed up Automatic Sensors mixed up Unit is shut down
57 P-63 High pressure fault in circuit A Manual Fan fault Circuit is shut down
58 P-64 High pressure fault in circuit B As above As above As above
59 P-97 Reversed evaporator entering/
leaving water sensors Manual Sensor defective, sensors reversed Unit is shut down
60 P-99 Reversed condenser entering/leaving
water sensors Manual Sensor defective, sensors reversed Unit is shut down