User guide

8
TROUBLESHOOTING
This troubleshoo ting guide describes some of the simple
causes of probl em s with the installati o n of the automati c
transfer switch. Trouble s h oot ing be yon d the scope of this
guide should not be attempted by the installer. Alicensed
electric ian must perform all internal troublesho oti ng. 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 both cir c u i t bre ak er s .
Problem 1
The UTILITY acceptable light does not come on when utility
power is connected to the automatic transfer switch.
● Verify that the utility feed is 240 V ac nominal and 60 Hz.
● Verify that the utility feed is wired to the terminal lugs on
the bottom of the transfer sw itch marked L1 and L5.
● Verify that the utility feed is connected and that its circuit
breaker is ON.
● 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 (UTILITY acceptable light and/or
GENERATOR acceptable lights are on) but both
TRANSFER SWITCH position lights are off.
● 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.
● Verify that the generator starting controls are set for
automatic operation.
● 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.
● Verify that the generator battery is connected and that the
battery volt age meets the generator manufacturer’s
recommendation.
● 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.
● 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.
● V eri fy 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).
● V eri fy that the GENERATOR source acceptable light is on.
The transfer switc h will not retransfer the lo ad to the genera-
tor until the generator output is acceptable. If the light is off
verify that the circui t breaker fo r the generator feed is ON.
● Wai t 15 seconds. There is a 15 second delay after the
generator output becomes acceptable to permit the
generator to warm up.
● If the GENERATOR source acceptable light still does not
come on, see Problems 3 and 4.
Problem 6
The automatic transfer sw itch does not transfer t he load
back to the utility (TRANSFER SWITCH on utility light does
not come on).
● V eri fy that the UTILITY source acceptable light is on. The
transfer switch will not retransfer the load to the utility until
the utili ty source is acceptable and the light is on. If light is
off, verify that the circuit breaker from the utility feed is ON.
● Wai t 5 minutes. There is a 5 minute delay on retransfer to
the uti li ty.
Problem 7
The GENERATOR source acceptable light does not go off
after the automatic t ransfer switch retransfers the load back
to the utility.
● Wai t 1 minute. After lo ad retransfer to the utili ty, there is a
1 minute delay fo r generato r coo l down before shut down.
● Verify proper operation of the generator (see t he
generator manual).
Problem 8
Both TRANSFER SWITCH position lights are flashing (this
indicates an error condition). *
● Count the number of times the Automatic Generator
Exer ci se r li ght flashes (repeats after pause). This number
is the error code.
● Error co des:
2 Generator failed to start. See Problems 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 l oad
to the generator. Service required.
6 Transfer Switch did not transfer the l oad
to the utility. Servic e required.
7 Contro ll er error. Service required.
● 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.