Trane Voyager Commercial - Test 1; Test 2; Test 3

RT-SVX34C-EN 133
Diagnostics
Te s t 1
Zone Temperature Thermistor (ZTEMP)
This component is tested by measuring the resistance between terminals 1 and 2 on the Zone
Temperature Sensor. The following are some typical indoor temperatures, and corresponding
resistive values.
Te s t 2
Cooling Set Point (CSP) and Heating Set Point (HSP)
The resistance of these potentiometers are measured between the following ZSM terminals. Refer
to the chart above for approximate resistances at the given set points.
CSP = Terminals 2 and 3
Range = 100 to 900 Ohms approximate
HSP = Terminals 2 and 5
Range = 100 to 900 Ohms approximate
Te s t 3
System Mode and Fan Selection
The combined resistance of the Mode selection switch and the Fan selection switch can be
measured between terminals 2 and 4 on the ZSM. The possible switch combinations are listed
below with their corresponding resistance values.
Table 73. Resistance Values
Zone or Set
PointTemperature
Nominal ZTEMP
Resistance
Nominal CSP or HSP
Resistance
50° F 19.9 K-Ohms 889 Ohms
55° F 17.47 K-Ohms 812 Ohms
60° F 15.3 K-Ohms 695 Ohms
65° F 13.49 K-Ohms 597 Ohms
70° F 11.9 K-Ohms 500 Ohms
75° F 10.50 K-Ohms 403 Ohms
80° F 9.3 K-Ohms 305 Ohms
85° F 8.25 K-Ohms 208 Ohms
90° F 7.3 K-Ohms 110 Ohms
Table 74. Nominal Resistance
VAV System
Switch
CV System
Switch
CV Fan
Switch
Nominal
Resistance
OFF
OFF AUTO 2.3 K-Ohms
COOL AUTO 4.9 K-Ohms
AUTO
AUTO AUTO 7.7 K-Ohms
OFF ON 11.0 K-Ohms
COOL ON 13.0 K-Ohms
AUTO ON 16.0 K-Ohms
HEAT AUTO 19.0 K-Ohms
HEAT ON 28.0 K-Ohms