Trane Tracer UC600 - Testing Input and Output Points

BAS-SVX45F-GB 67
Commissioning/Troubleshooting in a Powered State
Resistive Inputs
2.5
3
3.5
4
1.5
0
0.5
1
2
40-40 20-20 0 60 80 100
Voltage Measured Across Input–Vdc
Thermistor Input–°C
Measured Voltage Across a Thermistor Input
Resistive Input–kΩ (Ohms)
Measured Voltage Across a Resistive Input
Voltage Measured Across Input–Vdc
10 12460 2 16 1882014
2.5
1.5
0
0.5
1
2
Checkout Procedure Measurement Expected Value
Step 1 Measure AC voltage across the resistive termination
Vac ≈ 0.0 V
AC voltage will affect further measurement
Step 2 Measure DC voltage across the resistive termination Refer to the charts below
Charts show
measurements
across thermistor
input and resistive
input.