Operating Procedures
42 ARTC-SVX005A-EN
Expansion IO Screen
This screen controls analog inputs and digital requests.
There is an LED for each digital output that shows its state:
• Green LED - Indicates the valve has reached the
respective position.
• Gray LED - specified valve position hasn't been
reached
Expansion #1 (Master Only)
AI1 – AI6
These inputs indicate the inlet or outlet temperatures for
each of the three heat exchangers: evaporator, condenser,
or source.
AI7, AI8 - Cool SP / Heat SP (optional)
This is the external cooling or heating set point used when
the cooling and heating set points are controlled by the
BAS as hard-wired analog input signals.
Another way to set cooling or heating set points is via BAS
communication.
All microprocessor Analog Inputs (AI) are actually
Universal Inputs (UI), the same as the microprocessor
controller UI. So any microprocessor UI can be re-
configured to be either analog input, digital input, or
analog output.
Expansion #2
DI1-DI8
Indicates the status of the Discharge / Suction refrigerant
valves D1, D2, S1, S2.
Active Alarms Screen
The active alarms screen lists all active (triggered) and
non-active alarms in tabular form. See Figure above.
Information presented in this screen in tabular form
includes:
Select
This column indicates if the alarm is selected or unselected
for acknowledgment or resetting.
Action
This column brings up more details upon tapping.
“Action” applies for each module compressor alarms/
warnings such as Compressor Warning, Compressor
Failure, Compressor Lockout, and Compressor CoreSense
Failure.
Name
This column displays the descriptive title each alarm.
Status
This column displays the alarm state. There are four
possible states for any alarm:
• TRIGGERED (ACTIVE) / NOT ACKNOWLEDGED
• TRIGGERED (ACTIVE) / ACKNOWLEDGED
• NOT TRIGGERED / NOT ACKNOWLEDGED
• NOT TRIGGERED / ACKNOWLEDGED
Both active and non-active alarms can be acknowledged.
When a non-active alarm is acknowledged, it can be reset,
which immediately removes it from the active alarms list.
When all non-active alarms have been acknowledged,
only active alarms will remain on the list.
State
This column displays the numeric value of each alarm.
Figure 23. Active alarms for the chiller/heater
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