Alarms and Events
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IOM 1242-8 • PATHFINDER
®
MODEL AWV CHILLERS
Condenser Pressure Sensor Fault
Alarm:
Condenser Pressure Sensor Fault
Displayed Text: Cn CondPressSenFault
Trigger:
Trigger any time sensor input voltage is
less than 400 mv or more than 4600 mv
and UC communication with CC module is
OK for at least 1 second.
Action Taken:
Rapid shutdown of circuit and lock out
from running
Reset:
This alarm can be cleared manually via the
keypad or BAS command if sensor input
voltage is 400 mv to 4600 mv for at least 5
seconds.
Oil Pressure Sensor Fault
Alarm:
Oil Pressure Sensor Fault
Displayed Text: Cn OilPressSenFault
Trigger:
Trigger any time sensor input voltage is less
than 400 mv or more than 4600 mv and UC
communication with CC module is OK for at
least 1 second.
Action Taken:
Normal shutdown of circuit and lock out from
running
Reset:
This alarm can be cleared manually via the
keypad or BAS command if sensor input
voltage is 400 mv to 4600 mv for at least 5
seconds.
Suction Temperature Sensor Fault
Alarm:
Suction Temperature Sensor Fault
Displayed Text: Cn SuctTempSenFault
Trigger:
Trigger if any of the following are true for at
least 1 second:
•
Sensor input value < 340 Ω
•
Sensor input value > 300 kΩ
• Sensor reliability reported by control
system ≠ ‘No Fault’
Action Taken:
Normal shutdown of circuit and lock out
from running
Reset:
This alarm can be cleared manually via
the keypad or BAS command if sensor
input value is 340 Ω to 300 kΩ and sensor
reliability = ‘No Fault’ for at least 5 seconds.
Discharge Temperature Sensor Fault
Alarm:
Discharge Temperature Sensor Fault
Displayed Text: Cn DiscTempSenFault
Trigger:
Trigger if any of the following are true for at
least 1 second:
•
Sensor input value < 340 Ω
•
Sensor input value > 300 kΩ
• Sensor reliability reported by control
system ≠ ‘No Fault’
Action Taken:
Normal shutdown of circuit and lock out
from running
Reset:
This alarm can be cleared manually via
the keypad or BAS command if sensor
input value is 340 Ω to 300 kΩ and sensor
reliability = ‘No Fault’ for at least 5 seconds.
Evaporator EXV Motor Error
Alarm:
Evaporator EXV Motor Error
Displayed Text: Cn EvapExvMotorErr
Trigger:
If EEXV Type is set to E6V and driver
in Evaporator EXV module reports EXV
motor error. Driver A is for circuit #1 and
Driver B is for circuit #2.
Action Taken:
Rapid shutdown of circuit and lock out
from running
Reset:
This alarm can be cleared manually via
the keypad or BAS command if EXV motor
error is no longer being reported.
Power Loss While Running
Alarm:
Power Loss While Running
Displayed Text: Cn PwrLossWhileRun
Trigger:
Circuit running when controller loses power
Action Taken:
None
Reset:
N/A
Failed Pumpdown
Alarm:
Failed Pumpdown
Displayed Text:
Cn Pumpdown Fail
Trigger:
Circuit state = pumpdown for time >
Pumpdown Time set point
Action Taken:
Shut down circuit
Reset:
N/A
Economizer Pressure Sensor Fault
Alarm:
Economizer Pressure Sensor Fault
Displayed Text: Cn EconPressSenFault
Trigger:
The following conditions must be true to
trigger:
•
Economizer Configuration set point
= Yes
• 8 seconds have passed since UC
booted up
• Communication with EVD module is
OK
• Value reported is more than 3083
kPa or less than 3.85 kPa for at least
1 second.
Action Taken:
Economizer forced to closed state and will
remain closed.
