Operating Procedures
40 ARTC-SVX005A-EN
When an I/O screen is displayed, switching to other I/O
screens is accomplished by pressing their respective
buttons:
• The ANALOG button displays the analog screen.
• The DIGITAL button displays the digital screen.
• The EXP I/O button displays the expansion IO screen.
Analog Inputs
AI1 – AI3, AI6 – AI8
These inputs indicate the inlet or outlet temperatures for
each of the three heat exchangers: evaporator, condenser,
or source.
AI4
This input indicates suction pressure.
AI5
This input indicates discharge pressure.
AI9
This input indicates the panel temperature (optional). It is
used when the temperature control inside the control
panel requires either heating (for a cold environment) or
cooling (for a hot environment).
Analog Outputs
Analog output (AO) data includes these parameters:
AO1, AO2, AO3
These outputs indicate the evaporator, condenser, or
source isolation valve position as a percentage of opened
condition.
AO5
This indicates compressor speed (optional). It is used in
case of VSD-controlled compressors.
Digital Inputs
Digital input (DI) data includes these parameters:
Master I/O Expansion #2 Screen
Slave I/O Expansion #2 Screen
Master I/O Expansion #1 Screen
Table 8. Module input/output screens (continued)
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