User guide

6
OPERATION
utility (preferred source)
acceptable light
transf er switch on generator
(alternate source) light
transfer switch on utility
(preferred source) light
generator (alternate source)
acceptable light
exerciser
light
INDICATOR LIGHTS
On the front control display are five lights that indicate the
status of the sources and the automatic transfer switch.
❍
Utility (preferred source) acceptable
(light at the top left of the display)
● When on, this light indicates that the utility voltage is
acceptable for connection to the load.
❍
Generator (alternate source) acceptable
(light at the top right of the display)
● When on, this light indicates that the generator voltage
and frequency are acceptable for connection to t he load.
❍
Trans f er Sw it ch on utility (pref er r ed sou r ce)
(light at the center left of display)
● When on, this light indicates that the load is connected to
the utility (preferred source).
❍
Transfer Switch on generator (alt. source)
(light at the center right of display)
● When on, this light indicates that the load is connected to
the generator (alternate source).
❍
Automatic Generator Exerciser
(light above button at the right of display)
● When the uti li ty is acceptabl e and the lo ad is on the utili ty,
this light flashes the number o f days until the next exercise
period. When it is off, no exerciser period is set. The light is
also off any time the generator is running.
PUSH BUTTONS
On the front control display are two push buttons that
control the operation of the generator and the automatic
transfer switch.
● Push to Test (buttonontheleftside)
● This button is used to test the system. See the Manual
Generator Testing sectiononthenextpage.
● This button can be used to cancel any active
time delay.
Press and release
the button to bypass the time delay.
● This button can be used to clear displayed error codes.
See Troubleshooting section, Problem 8.
● Automatic Generator Exerciser (right button)
● This button is used to set the automatic generator
exerciser. See the next page.
UTILIT Y FAILUR E
The load is normally connected to the preferred source
(utility) if that source is acceptable. If the preferred source
(utility) fails, the following sequence occurs:
1. The UTILITY source acceptable light goes off.
2. The automatic transfer switch waits three seconds to pre-
vent nuisance starting of the generator from mo mentary
dips of the util ity vol tage. If the utili ty is restored during the
three seconds, the UTILITY source acceptable light
comes o n and no further action is taken.
3. If the utility remains unacceptabl e for three seco nds, the
automati c transfer switch cranks and starts the generator.
4. Once the generator starts, the automatic transfer switch
waits until the generator voltage and frequency are
acceptable. Then t he GENERATOR source acceptable
light comes on.
5. When the generator i s acceptabl e, the automatic transfer
switch waits 15 seconds to allow the generator to warm up.
Then it transfers the load to the generato r. The TRANS FER
SWITCH on generator (alternate source) light comes on.
6. The automatic transfer swi tch waits for the utility source to
be restored. When the utility again becomes acceptable
the UTILITY source acceptabl e li ght co mes on.
7. The automatic transfer switch then waits 5 minutes to
all ow the utility to stabi li ze. Then it retransfers the load
back to the util i ty. The TRANSFER SWITCH on utility
(preferred source) light comes on.
8. After load retransfer the generator wil l co nti nue to run
unloaded for one minute for engine cooldown. Then it is
stopped. The GENER ATO R acceptable light goes off.