IOM 1242-8 • PATHFINDER
®
MODEL AWV CHILLERS
74 www.DaikinApplied.com
Alarms and Events
Evaporator EWT Sensor Fault
Alarm:
Evaporator EWT Sensor Fault
Displayed Text: Evap EWT SenFault
Trigger:
If any of the following occur for more than
one second:
•
Resistance value is < 340 Ω
•
Resistance value is > 300 kΩ
• Reliability value reported for input is
anything other than ‘NoFault’
Action Taken:
Normal shutdown all circuits and lock out
unit from running
Reset:
This alarm can be cleared manually via the
keypad or BAS command if the following
are true for at least 5 seconds:
•
Resistance value is from 340 Ω to
300 kΩ
• Reliability value reported for input is
‘NoFault’
OAT Sensor Fault
Alarm:
OAT Sensor Fault
Displayed Text: OAT SenFault
Trigger:
If any of the following occur for more than
one second:
•
Resistance value is < 340 Ω
•
Resistance value is > 300 kΩ
• Reliability value reported for input is
anything other than ‘NoFault’
Action Taken:
Normal shutdown all circuits and lock out
unit from running
Reset:
This alarm can be cleared manually via the
keypad or BAS command if the following
are true for at least five seconds:
•
Resistance value is from 340 Ω to
300 kΩ
• Reliability value reported for input is
‘NoFault’
External Alarm
Alarm:
External Alarm
Displayed Text: External Alarm
Trigger:
External alarm input is open for at least 1
second.
Action Taken:
Rapid shutdown all circuits and lock out
unit from running
Reset:
Auto clear when external alarm input is
closed for five seconds.
Emergency Stop
Alarm:
Emergency Stop
Displayed Text: Emergency Stop Switch
Trigger:
Emergency Stop input off for 1 second
Action Taken:
Rapid shutdown all circuits and lock out
unit from running
Reset:
This alarm can be cleared manually via
the keypad or via BAS command after the
emergency switch input is on for 5 sec.
AC Module Comm Failure
Alarm:
AC Module Comm Failure
Displayed Text: AC Module Comm Fail
Trigger:
Communication with the module has failed.
Specifically, this means the reliability value
reported for the module is anything other
than 0 for at least 3 seconds.
Action Taken:
Rapid shutdown all circuits and lock out
unit from running
Reset:
This alarm can be cleared manually via the
keypad or BAS command after reliability
value reported for the module is 0 for at
least five seconds.
Evaporator EXV Module Comm Failure
Alarm:
Evaporator EXV Module Comm Failure
Displayed Text: EvapExvModCommFail
Trigger:
When evaporator Expansion Valve Type is
,
communication with the EVD module called
EEXV1 has failed. Specifically, this means
that 10 consecutive failures of read/write
command blocks for this modbus address
have occurred.
Action Taken:
Rapid shutdown all circuits and lock out
unit from running
Reset:
This alarm can be cleared manually
via the keypad or BAS command after
communication is restored for at least 5
seconds.
DC Fan Controller Comm Failure
Alarm:
DC Fan Controller Comm Failure
Displayed Text: DcFanCtrlCommFail
Trigger:
Condenser Fan VFD Configuration set
point is set to All Fan VFD and heartbeat
from DC fan controller is not received for
30 seconds.
Action Taken:
Normal shutdown all circuits and lock out
unit from running
Reset:
This alarm can be cleared manually via the
keypad or BAS command if heartbeat from
DC fan controller has been received in the
last 30 seconds.