EN -
49
AQUACIAT
POWER
9 - DIAGNOSTICS
JBus
code Code Alarm description
Reset type
Action taken
Possible cause
Thermistor failure
1
15001 WATER EXCHANGER ENTERING FLUID
THERMISTOR FAILURE
Automatic, if thermistor
reading returns to normal
Unit shuts down
Defective thermistor or
connection
2
15002 WATER EXCHANGER LEAVING FLUID
THERMISTOR FAILURE
As above
Unit shuts down
As above
3
15003 CIRCUIT A DEFROST THERMISTOR
As above
Cooling mode: Unit continues
to operate
Heating mode: Circuit A shuts
down
As above
4
15004 CIRCUIT B DEFROST THERMISTOR
As above
Cooling mode: Unit continues
to operate
Heating mode: Circuit B shuts
down
As above
5
15010 OAT THERMISTOR FAILURE
As above
Unit shuts down
As above
6
15011 MASTER/SLAVE COMMON LEAVING
FLUID THERMISTOR
As above
Master/slave operation is
disabled and the unit returns to
the stand-alone mode
As above
7
15012 CIRCUIT A SUCTION GAS THERMISTOR
As above
None
As above
8
15013 CIRCUIT B SUCTION GAS THERMISTOR
As above
None
As above
9
15021 SPACE TEMPERATURE THERMISTOR
As above
Unit continues to operate, but
the setpoint reset is cancelled
As above
10
15046 DC FREE COOLING WATER LOOP
THERMISTOR FAILURE
Automatic, if thermistor
reading returns to normal
Dry cooler free cooling is
disabled
Defective thermistor
11
15047 DC FREE COOLING LEAVING WATER
THERMISTOR FAILURE
As above
No action (alert)
As above
12
15048 DC FREE COOLING OAT SENSOR FAILURE As above
Dry cooler free cooling is
disabled
As above
Transducer failure
13 12001 CIRCUIT A DISCHARGE TRANSDUCER
Automatic, if sensor
voltage reading returns
to normal
Circuit A shuts down
Defective transducer
or connection
14 12002 CIRCUIT B DISCHARGE TRANSDUCER
As above
Circuit B shuts down
As above
15 12004 CIRCUIT A SUCTION TRANSDUCER
Null voltage: Automatic
(three alarms in the last
24 hours) or Manual
Impossible value:
Manual
Circuit A shuts down
As above
16 12005 CIRCUIT B SUCTION TRANSDUCER
As above
Circuit B shuts down
As above
17 12024 WATER EXCHANGER ENTERING FLUID
TRANSDUCER FAILURE
Automatic, if sensor
voltage reading returns
to normal
Unit shuts down, water
pressure calibration erased
As above
18 12025 WATER EXCHANGER LEAVING FLUID
TRANSDUCER FAILURE
As above
Unit shuts down, water
pressure calibration erased
As above
Communication failure
19 4901
LOSS OF COMMUNICATION WITH
CIRCUIT A SIOB BOARD
Automatic, if
communication is
re-established
Unit shuts down
Bus installation fault,
communication error
20 4902
LOSS OF COMMUNICATION WITH
CIRCUIT B SIOB BOARD
As above
Unit shuts down
As above
21 4906
LOSS OF COMMUNICATION WITH
ENERGY MANAGEMENT SIOB BOARD
As above
None
As above
22 4501
LOSS OF COMMUNICATION WITH FAN
BOARD NUMBER 1
As above
Unit shuts down
As above
23 4502
LOSS OF COMMUNICATION WITH FAN
BOARD NUMBER 2
As above
Unit shuts down
As above
24 4601
LOSS OF COMMUNICATION WITH DC
FREE COOLING BOARD
As above
None
As above
25 4701
LOSS OF COMMUNICATION WITH VFD
FAN DRIVE 1 CIRCUIT A
As above
Unit shuts down
As above
26 4702
LOSS OF COMMUNICATION WITH VFD
FAN DRIVE 2 CIRCUIT A
As above
Unit shuts down
As above
9.3
Alarms description
This section includes all alarms/alerts associated with the
operation of the unit as well as optional drives used to provide
variable speed fans and variable speed pumps functionalities.
9.3.1 General / Major alarms
The following table includes a list of alarms that might appear
on the unit.
