68
Test 3
Testing the VAV Setpoint Potentiometers
Turn the main power disconnect switch "OFF". Check each
potentiometer listed in the table below by measuring resis-
tance. These potentiometers are built into the RTAM module
and are not replaceable.
Test 4
Testing the Inlet Guide Vane Actuator (IGVA)
1. Using the "Step Test Mode" procedure described in the
"Unit Start-Up" section (Step 1 for VAV). Measure the volt-
age between the (+) and (-) terminals on the actuator.
The voltage should be 8.5 VDC. If not, check the wiring
between the RTAM and the IGV actuator. If the wiring
checks good, return to Test 1.
2. If the voltage above is present and the actuator is not
opening, verify that 24 VAC is present between terminals
T1 and T2. If the voltage is present, replace actuator.
Note: The IGVA can manually be driven open by
shorting the (F) terminal to either the (+) or (-)
terminals. The IGVA will drive closed when the short
is removed.
Test 5
Testing the VFD
1. Verify that the keypad in control box is powered. If not,
check the power wires to the VFD and the Keypad cable.
2. Using the "Step Test Mode", procedure described in the
"Unit Start-Up" section (Step 3 for VAV). Verify that the fan
starts and the speed increases until the SA Pressure
reaches the "Setpoint" on VAV Setpoint panel. If the fan
does not start, check for "Fault Conditions" on the VFD
Keypad.
3. If no "Fault Conditions" exist and the fan started but did
not ramp up to speed, verify the "speed reference volt-
age" output from the RTAM between terminals J4-1 and
J4-2.
4. If no "Fault Conditions" exist and the fan did not start,
verify that the Fan relay is energized and the VFD "Start
Command" is properly wired from the Fan relay, (24 volts
on the Logic Input 2 (LI2) terminal). Verify that the jumper
b24V and the LI1 terminal is properly con-
nected.
5. Verify that 115 VAC is present from the transformer on
the VFD assembly panel.
Static Pressure Setpoint
0-560 ohms (Approximate)
RTAM J7-1,2
Static Pressure Deadband
0-560 ohms (Approximate)
RTAM J7-7,8
Reset Setpoint
0-560 ohms (Approximate)
RTAM J7-11,12
Reset Amount
0-560 ohms (Approximate)
RTAM J7-5,6
Morning Warmup Setpoint
0-560 ohms (Approximate)
RTAM J7-9,10
Supply Air Cooling Setpoint
0-560 ohms (Approximate)
RTAM J7-3,4
System Troubleshooting (Continued)
Summary of Contents for Voyager RT-SVX17C-EN
Page 8: ...8 Figure 1 Unit Dimensions for TC_ TE_ and YC_330 360 and 420 MBH Units Low Heat ...
Page 9: ...9 Figure 1 continued Unit Dimensions for YC_330 360 and 420 MBH Units High Heat ...
Page 10: ...10 Figure 1 continued Unit Dimensions for TC_ TE_ and YC_480 and 600 MBH Units Low High Heat ...
Page 24: ...24 Figure 10 Typical FieldWiring Requirements for CV Control Options ...
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