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9.2 - Alarms description
9.2.1 - Alarms
Name Code Description Reset Action taken Possible cause
1
COOL_EWT_F 15001 Water Exchanger Entering Fluid
Thermistor Failure
Automatic, if thermistor
reading returns to normal
Unit shuts down Defective thermistor
2 COOL_LWT_F 15002 Water Exchanger Leaving Fluid Thermistor
Failure
As above As above As above
3 DEFROST_T_A_F 15003 Circuit A Defrost Thermistor Failure As above Cooling mode: Unit
continues to operate
Heating mode: Circuit A
shuts down
As above
4 DEFROST_T_B_F 15004 Circuit B Defrost Thermistor Failure As above Cooling mode: Unit
continues to operate
Heating mode: Circuit B
shuts down
As above
5 OAT_F 15010 OAT Thermistor Failure As above Unit shuts down As above
6 CHWSTEMP_F 15011 MASTER/Slave Common Fluid Thermistor
Failure
As above Master/Slave operation is
disabled, each unit
returns to the stand-
alone mode
As above
7 SUCTION_T_A_F 15012 Circuit A Suction Gas Thermistor Failure As above Circuit A shuts down As above
8 SUCTION_T_B_F 15013 Circuit B Suction Gas Thermistor Failure As above Circuit B shuts down As above
9 SGTC1_F 15044 Coil Suction Gas Thermistor Sensor 1
Failure
As above Circuit A shuts down (in
heating mode);
None (in cooling mode)
As above
10 SGTC2_F 15045 Coil Suction Gas Thermistor Sensor 2
Failure
As above Circuit B shuts down (in
heating mode);
None (in cooling mode)
As above
11 DP_A_F 12001 Circuit A Discharge Pressure Transducer
Failure
Automatic, if sensor voltage
reading returns to normal
Circuit A shuts down Defective transducer
12 DP_B_F 12002 Circuit B Discharge Pressure Transducer
Failure
As above Circuit B shuts down As above
13 SP_A_F 12004 Circuit A Suction Pressure Transducer
Failure
As above Circuit A shuts down As above
14 SP_B_F 12005 Circuit B Suction Pressure Transducer
Failure
As above Circuit B shuts down As above
15 SIOB_CIR_A_
COM_F
4901 Loss of communication with SIOB Board
Number A
Automatic, if
communication is
re-established
Circuit A shuts down As above
16 SIOB_CIR_B_
COM_F
4902 Loss of communication with SIOB Board
Number B
As above Circuit B shuts down Bus installation fault,
communication error
17 AUX1_COM_F 4601 Loss of communication with AUX1 Board As above Unit shuts down As above
18 COOLER_
FREEZE_F
10001 Water Exchanger Freeze Protection Automatic (the rst alarm in
the last 24 h) or Manual
Unit shuts down, the
water exchanger pump is
running
No water ow,
defective thermistor
19 LOW_SUCTION_A_F 10005 Circuit A Low Saturated Suction
Temperature
Automatic (the rst alarm in
the last 24 h) or Manual
Circuit A shuts down Pressure transducer
defective, EXV blocked or
lack of refrigerant
20 LOW_SUCTION_B_F 10006 Circuit B Low Saturated Suction
Temperature
As above Circuit B shuts down As above
21 HIGH_SH_A_F 10008 Circuit A High Superheat Manual Circuit A shuts down Pressure transducer
defective, temperature
sensor defective, EXV
blocked or lack of
refrigerant
22 HIGH_SH_B_F 10009 Circuit B High Superheat Manual Circuit B shuts down As above
23 LOW_SH_A_F 10011 Circuit A Low Superheat Manual Circuit A shuts down As above
24 LOW_SH_B_F 10012 Circuit B Low Superheat Manual Circuit B shuts down As above
25 COOLER_LOCK_F 10014 Interlock Failure Automatic (if the unit was
stopped) or Manual
Unit shuts down Customer interlock input
set on
26 CPA1_REVERSE_
ROT_F
10016 Compressor A1 Not Started Or Pressure
Increase not Established
Manual Compressor A1 shuts
down
Compressor breaker or
fuse fault, compressor
switch open
27 CPA2_REVERSE_
ROT_F
10017 Compressor A2 Not Started Or Pressure
Increase not Established
Manual Compressor A2 shuts
down
As above
28 CPA3_REVERSE_
ROT_F
10018 Compressor A3 Not Started Or Pressure
Increase not Established
Manual Compressor A3 shuts
down
As above
29 CPB1_REVERSE_
ROT_F
10020 Compressor B1 Not Started Or Pressure
Increase not Established
Manual Compressor B1 shuts
down
As above
30 CPB2_REVERSE_
ROT_F
10021 Compressor B2 Not Started Or Pressure
Increase not Established
Manual Compressor B2 shuts
down
As above
31 LOSS_COM_SM_F 10029 Loss of communication with System
Manager
Automatic, if
communication is
re-established
Unit returns to the
stand-alone mode
CCN bus installation
defective
32 LOSS_COM_MS_F 10030 Master/Slave communication Failure Automatic, if
communication is
re-established
Master/Slave operation is
disabled, the unit returns
to the stand-alone mode
CCN bus installation
defective
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