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APPENDIX A
ALARM CODES
Each alarm in the system is assigned a code to indicate the exact condition. If a condition can cause both
a warning and a fault, they will share the same alarm code and the severity will be indicated by the alarm
type on the system. For example, a power loss fault is code
P.0
. If Auto Restart is enabled, power failures
will cause a warning
P.0
to be triggered. However, if Auto Restart is disabled or the Maximum Power Loss
Time is exceeded, a fault
P.0
will be triggered.
Alarm codes are set up in a
major.minor
format. The major portion of the code defines the component or
subsystem, and the minor code defines the specific condition. Table 3 below provides a definition of the
major codes and components.
Table 3: Alarm Major Codes
Major
Code
Component
Description
A1
Airend 1
This major code indicates an issue related to the compressor airend, such as
high discharge temperature.
P
Package
This category indicates an issue related to the compressor package, such as
separator and reservoir sensors.
S
Service
This category indicates issues with service items, such as maintenance
timers and filter monitors.
M1
Motor
This category indicates an issue with the main compressor motor, such as
over-temperature.
F1
Fan
This category indicates an issue with the fan or fan motor, such as over-
temperature.
C
Controller
This category indicates an issue with the controller, such as a configuration
error or hardware fault.
V1
VFD
This category indicates an issue with the main compressor variable speed
drive.
SQ
Sequencing
This category indicates an issue with the sequencing communications
system, such as communication faults.
Refer to Table 4 below for a list of all faults and warnings on the system. Note that some alarms are
specific to the machine configuration and sensors that are present.
Table 4: Alarm Codes
Alarm Code
Alarm Name
Severity
Major
Minor
Warning
Fault
Notice
A1
0
Low Inlet Temperature
✔
✔
A1
1
High Inlet Temperature
✔
✔
A1
3
Inlet Temperature Sensor Shorted
✔
A1
4
Inlet Temperature Sensor Open
✔
A1
5
Low Discharge Temperature
✔
✔
A1
6
High Discharge Temperature
✔
✔
A1
7
High Discharge Temperature Rate of Rise
✔
A1
8
Discharge Temperature Sensor Shorted
✔
A1
9
Discharge Temperature Sensor Open
✔
A1
15
High Discharge Pressure
✔
✔
A1
16
Discharge Pressure Sensor Shorted
✔
A1
17
Discharge Pressure Sensor Open
✔
