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9.6 - Alarms description
The following tables include all general alarms/alerts
associated with the operation of the unit as well as drive alarms.
9.6.1 - General alarms
JBus
code
Alarm
code
Description Reset type Action taken Possible cause
Thermistor failure
1 15001 Cooler Entering Fluid Thermistor Automatic, if thermistor
reading returns to normal
Unit shuts down Defective thermistor
2 15002 Cooler Leaving Fluid Thermistor As above Unit shuts down As above
3 15010 OAT Thermistor Failure As above Unit shuts down As above
4 15023 Cooler heater feedback thermistor Failure As above No action (alert) As above
5 15011 MASTER/Slave Common Fluid Thermistor As above Master/Slave control is
disabled, the unit returns to
the stand-alone mode
As above
6 15012 Circuit A Suction Gas Thermistor As above Circuit A shuts down As above
7 15013 Circuit B Suction Gas Thermistor As above Circuit B shuts down As above
8 15015 Circuit A Discharge Gas Thermistor As above Circuit A shuts down As above
9 15016 Circuit B Discharge Gas Thermistor As above Circuit B shuts down As above
10 15018 Circuit A Condenser Subcooling Liquid
Thermistor
As above Circuit A shuts down As above
11 15019 Circuit B Condenser Subcooling Liquid
Thermistor
As above Circuit B shuts down As above
12 15033 Circuit A compressor Motor Thermistor As above Circuit A shuts down As above
13 15034 Circuit B compressor Motor Thermistor As above Circuit B shuts down As above
14 15024 Circuit A Economizer Gas Thermistor As above Circuit A shuts down As above
15 15025 Circuit B Economizer Gas Thermistor As above Circuit B shuts down As above
16 15021 Space Temperature Thermistor As above No action (alert) As above
Transducer failure
17 12001 Circuit A Discharge Transducer Automatic, if sensor voltage
reading returns to normal
Circuit A shuts down Defective transducer
18 12002 Circuit B Discharge Transducer As above Circuit B shuts down As above
19 12004 Circuit A Suction Transducer When compressor is "o":
Automatic, if sensor voltage
reading returns to normal
(3 alarms within 24 hours);
otherwise, Manual
When compressor is “on”:
Manual
Circuit A shuts down As above
20 12005 Circuit B Suction Transducer As above Circuit B shuts down As above
21 12010 Circuit A Oil Pressure Transducer Automatic, if sensor voltage
reading returns to normal
Circuit A shuts down As above
22 12011 Circuit B Oil Pressure Transducer As above Circuit B shuts down As above
23 12013 Circuit A Economizer Pressure Transducer As above Circuit A shuts down As above
24 12014 Circuit B Economizer Pressure Transducer As above Circuit B shuts down As above
25 12024 Water Pressure 1 Transducer As above No action (alert) Defective transducer
(applicable to units tted
with the hydronic kit)
26 12025 Water Pressure 2 Transducer As above No action (alert) Defective transducer
(applicable to units tted
with the hydronic kit or
variable speed pumps)
27 12029 Water Pressure too low - Pump cavitation
risks
Automatic, if water pressure
returns to normal and the
minimum pressure threshold
supported by pump has not
been achieved
Manual, if water pressure
has dropped below the
minimum pressure
threshold of pump.
1
st
scenario (automatic
reset): No action (alert)
2
nd
scenario (manual reset):
Unit shuts down
Water loop pressure too
low, risk of pump cavitation
28 12031 Circuit A Condenser Subcooling Liquid
Pressure Transducer
Automatic, if sensor voltage
reading returns to normal
Circuit A shuts down Defective transducer
29 12032 Circuit B Condenser Subcooling Liquid
Pressure Transducer
As above Circuit B shuts down As above
Communication failure
30 4901 Loss of communication with SIOB Board
Number 1
Automatic, if communication
is re-established
Unit shuts down Bus installation fault,
communication error
31 4902 Loss of communication with SIOB Board
Number 2
As above Circuit B shuts down As above
32 4501 Loss of Communication with Auxiliary # 1 As above Unit shuts down As above
33 4502 Loss of Communication with Auxiliary # 2 As above Circuit A shuts down As above
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