IOM 1206-13 • TRAILBLAZER
®
MODEL AGZ CHILLERS
92 www.DaikinApplied.com
Alarms
least 400mv OR
• OAT < 40.56°C (105°F) and sensor input voltage is from
400mv to 4600mv.
Condenser Pressure Sensor Fault
Trigger:
Trigger any time sensor input voltage is less than
400mv or more than 4600mv and UC communication with CC
module is OK, for at least one 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, but only if the sensor is back in range for at
least 5 seconds.
Suction Temperature Sensor Fault
Trigger:
In order to trigger, Expansion Valve Type must be
Electronic. Trigger if any of the following are true for at least 1
second:
•
Sensor input value is less than 340 Ω or greater than 300
kΩ
•
Sensor reliability reported by control system ≠ ‘No Fault’
Action Taken:
Normal shutdown of circuit and lock out from
running.
Reset:
This alarm should be cleared manually if the sensor
is back in range and reliability value reported for input is ‘No
Fault’ for at least five seconds.
Compressor CC Module Comm Failure
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 of circuit and lock out 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 5 seconds.
EEXV Module Comm Failure
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 of circuit and lock out 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 5 seconds.
Failed Pumpdown
Trigger:
Circuit state = pumpdown for longer than 2 minutes.
Action Taken:
Shut down circuit.
Reset:
N/A.
Alarm Logs
Press the alarm button on the controller to go to the alarm
section. Three alarm sub-sections will appear. Turn the
navigating wheel to highlight among them and press the wheel
for controller components.
Active Alarms
When an alarm or event occurs, it appears in the active alarm
list. The active alarm list holds a record of all active alarms
not yet cleared and includes the date and time each occurred.
When cleared, the alarm transfers to the Alarm Log that
contains an alarm history with time/date stamp. A (+) before an
alarm indicates that it is active, a (-) indicates a cleared alarm.
The Active Alarm list is only limited by the number of alarms
since any given alarm cannot appear twice.
Alarm Log
An alarm log stores the last 50 occurrences or resets that
occur. When an alarm or event occurs, it is put into the first slot
in the alarm log and all others are moved down one, dropping
the last entry. The date and time the alarm occurred are stored
in the alarm log.
Event Log
An Event Log similar to the Alarm Log stores the last 50
event occurrences. Each Event Log entry includes an event
description and a time and date stamp for the event occurrence
plus the count of the event occurrences on the current day and
for each of the last seven days. Events do not appear in the
Active Alarm list.
Clearing Alarms
Active alarms can be cleared through the keypad/display or a
BAS network. Alarms are automatically cleared when controller
power is cycled. Alarms are cleared only if the conditions
required to initiate the alarm no longer exist. All alarms and
groups of alarms can be cleared via the keypad or network
via LON using nviClearAlarms and via BACnet using the
ClearAlarms object.
To use the keypad, follow the Alarm links to the Alarms screen,
which will show Active Alarms and Alarm Log. Select Active
Alarm and press the wheel to view the Alarm List (list of current
active alarms). They are in order of occurrence with the most
recent on top. The second line on the screen shows Alm Cnt
(number of alarms currently active) and the status of the alarm
clear function. Off indicates that the Clear function is off and
the alarm is not cleared. Press the wheel to go to the edit
mode. The Alm Clr (alarm clear) parameter will be highlighted
with OFF showing. To clear all alarms, rotate the wheel to
select ON and enter it by pressing the wheel.
An active password is not necessary to clear alarms.
If the problem(s) causing the alarm have been corrected, the
alarms will be cleared, disappear from the Active Alarm list
and be posted in the Alarm Log. If not corrected, the On will
immediately change back to OFF and the unit will remain in the
alarm condition.
