Manual

8
TROUBLESHOOTING
This troublesho oti ng guide describes some of the simple
causes of probl ems with the installati o n of the automati c
transfer switch. Troubleshooting be yon d th e scope of th i s
guide should not be attempted by the installer. Alicensed
electric ian must perform all internal troubl esho oting. ASCO
can be contacted at 800–937–ASCO or www .asco.com.
ELECTROCUTION – FLASH HAZARD
Do not work on the transfer switch
until both the utility and generator are
off. Turn OFF bot h ci r c uit breaker s .
Problem 1
The UTILITY acceptable light does not come on when utility
power is connected to the automatic transfer switch.
S Verify that the utility feed is 240 V ac nominal and 60 Hz.
S Verify that the utility feed is wired to the terminal lugs on
the bottom of the transfer switch marked L1 and L5.
S Verify that the utility feed is connected and that its circuit
breaker is ON.
S With ALL POWER OFF, verify that the transfer switch
harness is connected properly to the controller (plug at
the bottom).
Problem 2
Power is connected (UT ILITY acceptable light and/or
GENERATOR acceptable lights are on) but both
TRANSFER SWITCH position lights are off.
S With ALL POWER OFF, verify that the transfer switch
harness is connected properly to the controller (plug at
the bottom).
Problem 3
Generator does not crank when the utility source fails or
when the Push to Test button is pressed.
S Verify that the generator starting controls are set for
automatic operation.
S Verify engine start low voltage wiring between controller
terminal block TB7 (plug on the left) and the generator.
Check that TB7 plug is properly seated in TB7 receptacle.
S Verify that the generator battery is connected and that the
battery voltage meets the generator manufacturer’ s
recommendation.
S Verify that the correct contact (normally open or normally
closed) is being utilized (see the generator manual).
Problem 4
Generator cranks but does not start when the utility source
fails or when the Push to Test button is pressed.
S Verify engine start low voltage wiring between controller
terminal block TB7 (plug on the left) and the generator.
Check that TB7 plug is properly seated in TB7 receptacle.
S Verify proper generator operation (see generator manual).
Problem 5
The automatic transfer switch does not transfer the load to
the generator (TRANSFER SWITCH on generator light does
not come on).
S Verify that the GENERATOR source acceptable light is on.
The transfer switch will not retransfer the load to the genera-
tor until the generato r output is acceptable. If the light is off
verify that the circuit breaker for the generator feed is ON.
S W ait 15 seconds. There is a 15 second delay after the
generator o utput becomes acceptabl e to permit the
generator to warm up.
S If the GENERATOR source acceptable light still does not
come on, see Problems 3 and 4.
Problem 6
The automatic transfer switch does not transfer the load
back to the utility (TRANSFER SWITCH on utility light does
not come on).
S Verify that the UTILITY source acceptable light is on. The
transfer switch wil l not retransfer the l oad to the utili ty until
the utility source is acceptabl e and the light is o n. If light is
off, verify that the circuit breaker from the utility feed is ON.
S W ait 5 minutes. There is a 5 minute delay o n retransfer to
the util i ty.
Problem 7
The GENERATOR source acceptable light does not go off
after the automatic transfer sw itch retransfers the load back
to the utility.
S W ait 1 minute. After lo ad retransfer to the utili ty, there is a
1 minute del ay for generator cool down before shut down.
S Verify proper operation of the generator (see the
generator manual).
Problem 8
Both TRANSFER SWITCH position lights are flashing (this
indicates an error condition). *
S Count the number of times the Automatic Generator
Exer ci se r light flashes (repeats after pause). This number
is the error code.
S Error co des:
2 Generator failed to start. See Pro blems 3 and 4.
3 Generator failed after starting. See generator manual.
4 Generator over frequency. See generator manual .
5 Transfer Switch did not transfer the lo ad
to the generator. Serv ice required.
6 Transfer Switch did not transfer the lo ad
to the util i ty. Servic e required.
7 Contro ll er error. Service requi red.
S To clear error code, press and release Push to Test button.
* NOTE: These lights will flash only when controller power
is available from either of the two power sources.