Test 1; Test 2; Test 3 - Trane Voyager Commercial Installation & Operation Manual

Test 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.
Table 73. Resistance Values
Zone or Set
PointTemperature
50° F
55° F
60° F
65° F
70° F
75° F
80° F
85° F
90° F

Test 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

Test 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 74. Nominal Resistance
VAV System
Switch
OFF
AUTO
RT-SVX34C-EN
Nominal ZTEMP
Resistance
19.9 K-Ohms
17.47 K-Ohms
15.3 K-Ohms
13.49 K-Ohms
11.9 K-Ohms
10.50 K-Ohms
9.3 K-Ohms
8.25 K-Ohms
7.3 K-Ohms
CV System CV Fan
Switch Switch
OFF AUTO
COOL AUTO
AUTO AUTO
OFF ON
COOL ON
AUTO ON
HEAT AUTO
HEAT ON
Nominal CSP or HSP
Resistance
889 Ohms
812 Ohms
695 Ohms
597 Ohms
500 Ohms
403 Ohms
305 Ohms
208 Ohms
110 Ohms
Nominal
Resistance
2.3 K-Ohms
4.9 K-Ohms
7.7 K-Ohms
11.0 K-Ohms
13.0 K-Ohms
16.0 K-Ohms
19.0 K-Ohms
28.0 K-Ohms
Diagnostics
133