IOM 1206-13 • TRAILBLAZER
®
MODEL AGZ CHILLERS
90 www.DaikinApplied.com
Alarms
Evaporator EWT Sensor Fault
Trigger:
Sensor shorted or open for longer than one second.
•
Resistance value is less than 340 Ω or more than 300 kΩ
• Reliability value reported for input is anything other than
‘No Fault’.
Action Taken:
None
Reset:
This alarm should be cleared automatically if the sensor
is back in range and reliability value reported for input is ‘No
Fault’ for at least five seconds.
Outdoor Air Temperature Sensor Fault
Trigger:
Sensor shorted or open for longer than one second.
•
Resistance value is less than 340 Ω or more than 300 kΩ
• Reliability value reported for input is anything other than
‘No Fault’.
Action Taken:
Normal stop all circuits and lock out unit from
running.
Reset:
This alarm can be cleared manually via the keypad
or BAS command, but only if the sensor is back in range and
reliability value reported for input is ‘No Fault’ for at least five
seconds.
External Alarm
Trigger:
External Alarm/Event opens for at least 5 seconds
and external fault input is configured as an alarm.
Action Taken:
Rapid shutdown all circuits and lockout unit
from running.
Reset:
Auto clear when digital input is closed.
Evaporator Pump #1 Failure
Trigger:
Unit is configured with primary and backup pumps,
pump #1 is running, and the pump control logic switches to
pump #2.
Action Taken:
Backup pump is used.
Reset:
This alarm can be cleared manually via the keypad or
BAS command.
Evaporator Pump #2 Failure
Trigger:
Unit is configured with primary and backup pumps,
pump #2 is running, and the pump control logic switches to
pump #1.
Action Taken:
Backup pump is used.
Reset:
This alarm can be cleared manually via the keypad or
BAS command.
External Event
Trigger:
External Alarm/Event input is open for at least 5
seconds and external fault is configured as an event.
Action Taken:
None.
Reset:
Auto clear when digital input is closed.
Bad Demand Limit Input
Trigger:
Demand limit input out of range and Demand Limit set
point is set to On. For this alarm, out of range is considered to
be a signal less than 3mA or more than 21mA.
Action Taken:
Demand limit function and signal are ignored.
Reset:
Auto clear when demand limit disabled or demand limit
input back in range for 5 seconds.
Bad LWT Reset Input
Trigger:
LWT reset input out of range and LWT reset is
enabled. For this alarm out of range is considered to be a
signal less than 3mA or more than 21mA.
Action Taken:
LWT reset signal and function are ignored.
Reset:
Auto clear when LWT Reset Type set point is not 4-20
mA or LWT reset input back in range for 5 seconds.
Heat Recovery LWT and EWT Sensor Fault
Trigger:
Sensor shorted or open for longer than one second.
•
Resistance value is less than 340 Ω or more than 300 kΩ
• Reliability value reported for input is anything other than
‘No Fault’.
Also, alarm can only trigger if Heat Recovery Control Type ≠
None and communication with CC1 is ok.
Action Taken:
Heat Recovery is forced off.
Reset:
This alarm should clear automatically if the sensor
is back in range and reliability value reported for input is ‘No
Fault’ for at least five seconds.
RapidRestore Module Comm Failure
Trigger:
RapidRestore set point is set to ‘Yes’ and
communication with the RapidRestore module has failed. This
means the reliability value reported for the module is anything
other than 0 for at least 3 seconds.
Action Taken:
RapidRestore
®
functionality will be disabled
while the module is not communicating since an input on the
module is required in order to enable the functionality.
Reset:
This alarm will automatically clear after communication
is restored for at least 5 seconds.
Circuit Fault Alarms
PVM/GFP Fault
Trigger:
Power Configuration = Multi Point and circuit PVM/
GFP input is off for longer than one second
Action Taken:
Rapid stop circuit.
Reset:
Auto reset when input is closed for at least 5 seconds
or if Power Configuration = Single Point.
