33
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 first alarm in
the last 24 h) or Manual
Unit shuts down, the
water exchanger pump is
running
No water flow,
defective thermistor
19
LOW_SUCTION_A_F 10005
Circuit A Low Saturated Suction
Temperature
Automatic (the first 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