Daikin Trailblazer AGZ030-101E Installation, Operation And Maintenance Manual page 93

Events
Situations may arise that require some action from the chiller
or that should be logged for future reference, but aren't severe
enough to track as alarms. These events are stored in a log
separate from alarms. This log shows the time and date of the
latest occurrence, the count of occurrences for the current day,
and the count of occurrences for each of the previous 7 days.
Unit Events
Unit Power Restore
Trigger: Unit controller is powered up.
Action Taken: None
Reset: None
Circuit Events
Low Evaporator Pressure - Hold
Trigger:
This event is triggered if all of the following are true:
• circuit state = Run
• evaporator pressure <= Low Evaporator Pressure - Hold
set point
• circuit is not currently in a low OAT start
• it has been at least 30 seconds since a compressor has
started on the circuit.
Action Taken: Inhibit starting of additional compressors on the
circuit.
Reset: While still running, the event will reset if evaporator
pressure > Low Evaporator Pressure Hold SP + 90 KPA (13
PSI). The event is also reset if the circuit is no longer in the run
state.
Low Evaporator Pressure - Unload
Trigger:
This event is triggered if all of the following are true:
• circuit state = Run
• more than one compressor is running on the circuit
• evaporator pressure <= Low Evaporator Pressure -
Unload set point for a time greater than half of the current
freezestat time
• circuit is not currently in a low OAT start
• it has been at least 30 seconds since a compressor has
started on the circuit.
Action Taken: Stage off one compressor on the circuit every
10 seconds while evaporator pressure is less than the unload
set point, except the last one.
Reset: While still running, the event will be reset if evaporator
pressure > Low Evaporator Pressure Hold SP + 90 KPA(13
PSI). The event is also reset if the circuit is no longer in the run
state.
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High Condenser Pressure - Unload
Trigger:
This event is triggered if all of the following are true:
• circuit state = Run
• more than one compressor is running on the circuit
• condenser pressure > High Condenser Pressure –
Unload set point
Action Taken: Stage off one compressor on the circuit every
10 seconds while condenser pressure is higher than the unload
set point, except the last one. Inhibit staging more compressors
on until the condition resets.
Reset: While still running, the event will be reset if condenser
pressure <= High Condenser Pressure Unload SP – 862
KPA(125 PSI). The event is also reset if the circuit is no longer
in the run state.
Compressor Communications
The CoreSense™ compressor communication module
on model sizes 070-241 provides advanced diagnostics,
protection, and communications that enhance compressor
performance and reliability.
Features include motor temperature protection, scroll
temperature protection, missing phase protection, reverse
phase protection, low control circuit voltage protection, short
cycling detection and alert, operational and fault history
storage, and LED status display.
Warnings and Alerts
A solid green LED indicates the module is powered and
operation is normal.
A solid red LED indicates an internal problem with the module.
A flashing green LED communicates Warning codes. Warning
codes do not result in a trip or lockout condition.
A flashing red LED communicates Alert codes. Alert codes will
result in a trip condition and possibly a lockout condition
Warning Codes (Flashing Green LED )
Code 1 – Loss of Communication: The module will flash the
green Warning LED one time indicating the module has not
communicated with the master controller for longer than 5
minutes.
Code 2 – Reserved For Future Use
Code 3 – Short Cycling: The module will flash the green
Warning LED three times indicating the compressor has short
cycled more than 48 times in 24 hours.
Code 4 – Open/Shorted Scroll Thermistor: The module will
flash the green Warning LED four times indicating an open/
shorted
Alert/Lockout Codes (Flashing Red LED)
Code 1 – Motor High Temperature: The module will flash the
red Alert LED one time indicating the motor is overheating .
93 IOM 1206-13 • TRAILBLAZER
Alarms
MODEL AGZ CHILLERS
®