Generac Power Systems ATC-300+ Operation And Maintenance Manual page 34

Instruction Booklet
Page 34 Effective: September 2011
Step 7: To change or add a setpoint, select Yes when the
"Change Setpoints" message appears on the screen.
Use the <Step/Enter> pushbutton to step through the
setpoints.
Use the <Increase> and <Decrease> pushbuttons to
change the setpoint.
When finished scrolling through and changing the desired
setpoints, answer Yes when the "Save Setpoints?" ques-
tion appears on the screen. The display will return to the
default screen.
ATC-300
Source 1
Source 2
STEP
HELP
ENGINE
TEST
Help
Engine
Lamp
Test
BYPASS
LAMP TEST
TDNE/TDEN
Figure 26. ATC-300+ Pushbuttons.
Unit Status
Available
Connected
Load
Available
Connected
INCREASE
DECREASE
Step
Enter se se
Test
Bypass Alarm
Reset
TDNE / TDEN
ENTER
ALARM RESET
For more information visit: www.generac.com
40-400A (480/600Vac) ATC-300+ 3-Postion
Contactor Based Transfer Switch
THE GENERATOR SHOULD BE MANUALLY STARTED AND THE
OUTPUT CHECKED AND VERIFIED BEFORE PROCEEDING TO STEP
8. IF IMPROPER VOLTAGE/FREQUENCY IS APPLIED TO THE LOAD,
THE ATS MAY BE DAMAGED.
Step 8: Manually start the engine generator at the generator con-
troller. Check that the generator is running and the
Source 2 Available amber LED is lit. Press the <Step/
Enter> pushbutton, step through the phase voltages,
frequency, and message display. If the source message
indicates that the source is Good, shut down the genera-
tor and place the Genset controller in the Auto-operating
position. If the message indicates a problem with the
source, the setpoints should be reviewed and the genera-
tor checked for proper voltage and frequency output.
Step 9: Initiate a Load Test from the front panel of the ATC-
300+ (Figure 28). This may be done by setting the
engine test setpoint to:
1 Load Test

then saving the setpoints. Once the engine test setpoint
has been changed and saved, press the <Engine Test>
pushbutton twice. The generator should start, the ATS
should transfer and run on the generator for the set test
interval, then proceed to a TDEN countdown and return
to Source 1. While the ATS is connected to Source 2,
use a voltmeter to check for correct system voltage on
the load terminals of the ATS. Check all phases on a 3-
phase system. Voltage measurements should be taken
phase to phase and phase to neutral. A load test will
cause a momentary power outage during transfer.
WARNING
IB01602078E