24 Vac Measurement; Binary Inputs, 24 Vac Detect, Method 1 Or 2 - Trane Symbio 500 Installation, Operation And Maintenance Manual

24 Vac Measurement

General Information
Checking the voltage that is
powering the Symbio 500 is
often a necessary step when
commissioning or
troubleshooting. Operational
issues and LED operation
may result in a need to
measure the input power.
When troubleshooting, it is
faster to take measurements
while the load is in place. If
Step 1 indicates an out-of-
specification voltage,
disconnect the Symbio 500
and measure the AC voltage
across the transformer. These
measurements can direct the
technician towards the
problem source.

Binary Inputs, 24 Vac Detect, Method 1 or 2

BAS-SVX090B-EN
Commissioning and Troubleshooting in Powered State
Checkout Procedure Measurement
Measure AC voltage with the
Symbio 500 connected.
Step 1
Perform this measurement
while the unit is under load.
Measure AC voltage with the
Symbio 500 unconnected.
Step 2
Perform this measurement
while the unit is not under
load.
Expected Value
20.0 Vac ≤ Vac ≤ 30.0 Vac
20.0 Vac ≤ Vac ≤ 30.0 Vac
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