Danfoss BW10 020-090, Operation Instructions Manual

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21
6.4 - Alarm codes
Alarm
No. Alarm
code Alarm description Reset type Probable cause Action taken by the control
Thermistor faults
1 th-01 Fluid sensor fault, evaporator water
outlet Automatic when the temperature measured
by the sensor returns to normal Defective thermistor Unit is shut down
2 th-02 Fluid sensor fault, evaporator water
inlet As above As above As above
3 th-06 Fluid sensor fault, condenser water
outlet Automatic when the temperature measured
by the sensor returns to normal Defective thermistor Unit is shut down
4 th-07 Fluid sensor fault, condenser water
inlet As above As above As above
5 th-10 Outside temperature sensor fault As above As above Unit is shut down
6 th-11 HTWSTEMP fluid sensor fault
(master/slave) As above As above The master/slave mode is
stopped
7 th-12 Suction sensor fault, circuit A As above As above Circuit is shut down
8 th-13 Suction sensor fault, circuit B As above As above As above
9 th-32 CHWSTEMP fluid sensor fault
(master/slave) As above As above The master/slave mode is
stopped
10 th-36 Fluid sensor fault DRY_LWT As above As above Unit is shut down
11 th-44 Sensor fault, discharge circuit A As above As above Circuit is shut down
12 th-45 Sensor fault, discharge circuit B As above As above Circuit is shut down
Pressure transducer faults
13 Pr-01 Discharge pressure transducer fault,
circuit A Automatic when the voltage transmitted by
the sensor returns to normal Defective transducer or installation
fault Circuit is shut down
14 Pr-02 Discharge pressure transducer fault,
circuit B As above As above As above
15 Pr-04 Suction pressure transducer fault,
circuit A As above As above As above
16 Pr-05 Suction pressure transducer fault,
circuit B As above As above As above
17 Pr-24 Entering evaporator water pressure
sensor fault Automatic when the voltage transmitted by
the sensor returns to normal Defective transducer or installation
fault Circuit is shut down
18 Pr-25 Leaving evaporator water pressure
sensor fault Automatic when the voltage transmitted by
the sensor returns to normal Defective transducer or installation
fault Circuit is shut down
19 Pr-26 Entering condenser water pressure
sensor fault As above As above As above
20 Pr-27 Leaving condenser water pressure
sensor fault As above As above As above
Communication with the slave boards
21 CO-BB Communication loss with the NRCP2
board Automatic when communication is
re-established Installation bus fault or defective
slave board Depending on the configuration,
compressor A3 is shut down or
circuit B is shut down.
22 Co-e1 Communication loss with the EXV
board As above As above Unit is shut down
23 Co-o1 Communication loss with the
PD-AUX 1 board As above As above Unit with optional water pressure
sensors, unit is shut down
24 Co-o2 Communication loss with the
PD-AUX 2 board As above As above Unit with optional water pressure
sensors, unit is shut down
25 Co-o3 Communication loss with the
PD-AUX 3 board As above As above Unit with drycooler, unit is shut
down
26 Co-o4 Communication loss with the
PD-AUX 4 board As above As above Unit with optional electric heater
stages
Process faults
27 P-01 Water heat exchanger frost
protection Automatic if the same alarm has not tripped
during the last 24 hours, otherwise manual. Water flow rate too low or defective
thermistor Unit is shut down
28 P-05 Low suction temperature, circuit A Automatic when the temperature returns to
normal, and if this alarm has not appeared
during the last 24 hours, otherwise manual. Pressure sensor defective, EXV
blocked or low refrigerant charge Circuit is shut down
29 P-06 Low suction temperature, circuit B As above As above As above
30 P-08 High superheat, circuit A As above As above As above
31 P-09 High superheat, circuit B As above As above As above
32 P-11 Low superheat, circuit A As above As above As above
33 P-12 Low superheat, circuit B As above As above As above
34 P-14 Water flow control and customer
interlock fault Automatic if the unit is in manual shut-down
status, otherwise manual. Heat exchanger pump defect or
water flow switch fault Unit is shut down
35 P-15 Condenser water flow control fault Automatic if the unit is in manual shut-down
status, otherwise manual. Heat exchanger pump defect or
water flow switch fault Unit is shut down
36 P-16 Compressor A1 not started or no
pressure increase registered Manual Connection problem Compressor is shut down
37 P-17 Compressor A2 not started or no
pressure increase registered As above As above As above
38 P-18 Compressor A3 not started or no
pressure increase registered As above As above As above
39 P-20 Compressor B1 not started or no
pressure increase registered As above As above As above
40 P-21 Compressor B2 not started or no
pressure increase registered As above As above As above
41 P-29 Communication loss with the System
Manager Automatic when communication is
re-established CCN installation bus defective Unit goes into autonomous mode