Alarms - Daikin Trailblazer AGZ030E-070E Installation, Operation And Maintenance Manual

Situations may arise that require some action from the chiller
or that should be logged for future reference. Alarms are
classified in the following sections as Faults, Problems, or
Warnings.
When any Unit Fault Alarm is active, the alarm digital output
should be turned on continuously. If both circuits have a Circuit
Fault Alarm active, the alarm digital output should be turned
on continuously. If no Unit Fault Alarm is active and only one
circuit has a Circuit Fault Alarm is active, the alarm digital
output should alternate five seconds on and five seconds off
continuously.
All alarms appear in the active alarm list while active. All alarms
are added to the alarm log when triggered and when cleared.
Entries in the log representing the occurrence of an alarm will
be preceded by '+' while entries representing the clearing of an
alarm will be preceded by '-'.
Unit Fault Alarms
PVM/GFP Fault
Trigger: Power Configuration = Single Point and PVM/GFP
Input #1 is open for longer than one second.
Action Taken: Rapid stop all circuits
Reset: Auto reset when input is closed for at least 5 seconds
or if Power Configuration = Multi Point.
Evaporator Flow Loss
Trigger:
1: Evaporator Pump State = Run AND Evaporator Flow Digital
Input = No Flow for time > Flow Proof Set Point AND at least
one compressor running
2: Evaporator Pump State = Start for time greater than
Recirc Timeout Set Point and all pumps have been tried and
Evaporator Flow Digital Input = No Flow
Action Taken: Rapid stop all circuits
Reset:
This alarm can be cleared at any time manually via the keypad
or via the BAS clear alarm command.
If active via trigger condition 1:
When the alarm occurs due to this trigger, it can auto reset the
first two times each day with the third occurrence being manual
reset.
For the auto reset occurrences, the alarm will reset
automatically when the evaporator state is Run again. This
means the alarm stays active while the unit waits for flow, then
it goes through the recirculation process after flow is detected.
Once the recirculation is complete, the evaporator goes to the
Run state which will clear the alarm. After three occurrences,
the count of occurrences is reset and the cycle starts over if the
manual reset flow loss alarm is cleared.
If active via trigger condition 2:
If the flow loss alarm has occurred due to this trigger, it is
IOM 1207-6 • TRAILBLAZER MODEL AGZ CHILLERS
®
always a manual reset alarm.
Evaporator Water Freeze Protect
Trigger: Evaporator LWT drops below evaporator freeze
protect set point and LWT sensor fault is not active for a time
longer than the evaporator recirculation time set point.
Action Taken: Rapid stop all circuits
Reset: This alarm can be cleared manually via the keypad,
but only if the alarm trigger conditions no longer exist.
Evaporator LWT Sensor Fault
Trigger: Sensor shorted or open for longer than one second
Action Taken: Normal stop all circuits
Reset: This alarm can be cleared manually via the keypad or
BAS command, but only if the sensor is back in range.
Outdoor Air Temperature Sensor Fault
Trigger: Sensor shorted or open for longer than one second
Action Taken: Normal stop of all circuits.
Reset: This alarm can be cleared manually via the keypad or
via BAS command if the sensor is back in range.
External Alarm
Trigger: External Alarm/Event opens for at least 5 seconds
and external fault input is configured as an alarm.
Action Taken: Rapid stop of all circuits.
Reset: Auto clear when digital input is closed.
Compressor Module 1 Comm Failure
Trigger: Communication with I/O extension module has failed.
Action Taken: Rapid stop of circuit 1.
Reset: This alarm can be cleared manually via the keypad or
BAS command when communication between main controller
and the extension module is working for 5 seconds.
Compressor Module 2 Comm Failure
Trigger: Communication with I/O extension module failed.
Action Taken: Rapid stop of circuit 2.
Reset: This alarm can be cleared manually via the keypad or
BAS command when communication between main controller
and the extension module is working for 5 seconds.
EXV Module 1 Comm Failure
Trigger: Expansion Valve Type = Electronic and
communication with the I/O extension module has failed.
Action Taken: Rapid stop of circuit 1.
Reset: This alarm can be cleared manually via the keypad or
BAS command when communication between main controller
and the extension module is working for 5 seconds or
Expansion Valve Type = Thermal.
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Alarms

Alarms
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