Operational Checks; Self Test; Check Manual Transfer Switch Operation; Electrical Checks - Generac Power Systems 22 kW Owner's Manual

3.7 — Operational Checks
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The following procedures require special tools and skills. Contact an authorized service provider to
perform these tasks.
3.7.1— Self Test
Upon power up, the controller goes through a system self test which checks for the presence of utility voltage on the
DC circuits. This is done to prevent damage if the installer mistakenly connects AC utility power sense wires into the
DC terminal block. If utility voltage is detected, the controller displays a warning message and locks out the generator,
thereby preventing damage to the controller. Remove power to the controller to clear this warning.
Utility voltage must be turned on and present at the N1 and N2 terminals inside the generator control panel for this test
to be performed and pass.
Before starting, complete the following:
Verify that the generator is OFF. A red LED on the control panel illuminates to confirm that the system is in the
1.
OFF mode.
Verify that the Main Circuit Breaker switch on the generator control panel is in the OFF (Open) position.
2.
Turn off all circuit breakers/electrical loads that will be powered by the generator.
3.
Check the coolant and engine lubricating oil levels. See Subsections 5.7.5 and 5.7.7, respectively.
4.
During initial start up only, the generator may exceed the normal number of start attempts and experience an "over
crank" fault. This is due to accumulated air in the fuel system during installation. Reset the control board and restart up
to two more times, if necessary. If unit fails to start, contact the local dealer for assistance.
3.7.2— Check Manual Transfer Switch Operation
Refer to the manufacturer's instructions.
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Do not attempt manual transfer switch operation until all power voltage supplies to the transfer switch
have been positively turned off. Failure to turn off all power voltage supplies will result in extremely
hazardous and possibly fatal electrical shock.
3.7.3— Electrical Checks
Complete electrical checks as follows:
Verify that the generator is OFF. A red LED on the control panel illuminates to confirm that the system is in the
1.
OFF mode.
Verify that the Main Circuit Breaker switch on the generator control panel is in the OFF (Open) position.
2.
Turn OFF all circuit breakers/electrical loads that will be powered by the generator.
3.
Turn on the utility power supply to the transfer switch using the means provided (such as a utility main line circuit
4.
breaker).
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The transfer switch is now electrically "hot." Contact with "hot" parts will result in extremely hazard-
ous and possibly fatal electrical shock.
Use an accurate AC voltmeter to check utility power source voltage across transfer switch terminals N1, N2, and
5.
N3 (if three phase). Normal line-to-line voltage should be equivalent to rated unit voltage.
Check utility power source voltage across terminals N1, N2, and N3 (if three phase) and the transfer switch neu-
6.
tral lug.
When certain that utility supply voltage is compatible with transfer switch and load circuit ratings, turn OFF the
7.
utility power supply to the transfer switch.
Press MANUAL on the control panel to crank and start the engine.
8.
Owner's Manual for Stationary Emergency Generators
Activation and Startup
15