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7.5 - Alarm codes
7.5.1 - General alarm codes
Alarm
No.
ALARMRST
1 15001 Evaporator entering water thermistor fault Automatic if the temperature
measured by the sensor
returns to normal
Unit shuts down Defective thermistor
2 15002 Evaporator leaving water thermistor fault As above Unit shuts down As above
3 15006 Condenser entering water thermistor fault As above Unit shuts down, if entering water control
in heating mode. Otherwise none.
As above
4 15007 Condenser leaving water thermistor fault As above Unit shuts down, if leaving water control
in heating mode. Otherwise none.
As above
5 15011 Common water master/slave thermistor fault As above Unit returns to stand-alone mode As above
6 15032 Common hot water master/slave thermistor fault As above Unit returns to stand-alone mode As above
7 15012 Suction gas temperature sensor fault, circuit A As above Circuit A shuts down As above
8 15013 Suction gas temperature sensor fault, circuit B As above Circuit B shuts down As above
9 15015 Discharge gas temperature sensor fault, circuit A As above Circuit A shuts down As above
10 15016 Discharge gas temperature sensor fault, circuit B As above Circuit B shuts down As above
11 15033 Compressor motor temperature sensor fault,
circuit A
As above Circuit A shuts down As above
12 15034 Compressor motor temperature sensor fault,
circuit B
As above Circuit B shuts down As above
13 15021 Space Temperature Thermistor As above None As above
14 15036 Dry Cooler Leaving thermistor Failure As above None As above
15 15010 Outdoor air Thermistor As above None As above
16 12001 Discharge transducer fault, circuit A Automatic, if the voltage
transmitted by the sensor
returns to normal
Circuit A shuts down Transducer fault or
installation fault
17 12002 Discharge transducer fault, circuit B As above Circuit B shuts down As above
18 12004 Suction transducer fault, circuit A As above Circuit A shuts down As above
19 12005 Suction transducer fault, circuit B As above Circuit B shuts down As above
20 12010 Oil pressure transducer, circuit A As above Circuit A shuts down As above
21 12011 Oil pressure transducer, circuit B As above Circuit B shuts down As above
Communication with slave boards
22 4401 Communication loss with EXV board 1 Automatic if the communi-
cation is re-established
Unit shuts down Bus installation fault or
defective slave board
23 4501 Communication loss with auxiliary board 1 As above Unit continues to operate, but the
functions linked to the board are
deactivated
As above
24 4502 Communication loss with auxiliary board 2 As above Unit shuts down As above
25 4503 Communication loss with auxiliary board 3 As above Circuit B shuts down As above
26 4504 Communication loss with auxiliary board 4 As above Circuit B shuts down As above
27 4601 Communication loss with the main NRCP2 board As above Unit shuts down As above
28 4603 Communication loss with energy management
board
As above Unit continues to operate, but the
functions linked to the board are
deactivated
As above
29 4701 Communication loss with variator, compressor A As above Circuit A shuts down As above
30 4702 Communication loss with variator, compressor B As above Circuit B shuts down As above
31 10001 Evaporator frost protection Automatic, if the same alarm
has not tripped during the
last 24 hours, otherwise
manual
Unit shuts down. Start-up of the
evaporator pump, if the unit has shut
down
Lack of water ow or
defective thermistor
32 10002 Condenser frost protection, circuit A Automatic, if the saturated
discharge temperature is
above 4.4°C
Circuit shuts down. Start-up of the
condenser pump, if the unit has shut
down
Discharge pressure trans-
ducer defective, refrigerant
leak or low condenser
water temperature
33 10003 Condenser frost protection, circuit B As above As above As above
34 10005 Low saturated suction temperature, circuit A Automatic, if the temperature
returns to normal and if the
same alarm has not tripped
during the last 24 hours
Compressor capacity increase or
unloading stopped, depending on the
temperature value
Pressure sensor, EXV
blocked or lack of
refrigerant
35 10006 Low saturated suction temperature, circuit B As above As above As above
40 10014 Customer safety loop fault Automatic, if the same alarm
has not tripped during the
last 24 hours
Unit shuts down -
41 10030 Master/slave communication fault As above - As above
42 10067 Low oil pressure, circuit A Manual Circuit A shuts down Pressure sensor or
wiring defective or oil
lter badly installed
43 10068 Low oil pressure, circuit B Manual Circuit B shuts down As above
44 10070 Maximum oil lter pressure dierential, circuit A Manual Circuit A shuts down As above
45 10071 Maximum oil lter pressure dierential, circuit B Manual Circuit B shuts down As above
* Alarm code in ALARMRST table
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