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7
TROUBLE-SHOOTING
Table A. Trouble Shooting the ATS Annunciator
Problem Probable Cause Corrective Action
1. Normal and Emergency
lights flash alternately on al
l
ATS A nnunciators.
No communication made.
Incorrect, broken, or shorted
wiring between ATSs and
ATS A nnunciators.
Recheck wiring; check for
shorted or open circuits.
Be sure correct twisted pairs
are connected.
2. Normal and Emergency
lights flash alternately on
only one
Annunciator.
No communication made.
AddressesonATSsdonot
correspond to addresses on
ATS A nnunciator.
Recheck a ddress settings in
ATS A nnunciator and ATS
Control Panels. They must
be the same.
3. Normal and Emergency
lights flash for only one
ATS
column (not alternately)
Communication lost to that
ATS due to no power to ATS
location.
Check power and
communication lines at all
ATSs.
4. Normal and Emergency
lights flash for all
ATS
columns (not alternately)
Communication lost due to
power failure at all ATSs, or
broken or shorted
communication line.
Check power and
communication lines at all
ATSs.
5. When Transfer Test is
pressed amber light does
not flash.
KeyswitchonMasterATS
Annunciator in Lock position.
Insert k ey and turn it to
Unlock position.
6. When Time Delay Bypass is
pressed amber light does
not go off.
KeyswitchonMasterATS
Annunciator in Lock position.
Key switch w as turned to
Lock before test completed.
Insert k ey and turn it to
Unlock position.
If corrections do not resolve the problem, call your local ASCO Power
Techn olo g ies or Aut h oriz ed Re p resent ative Offic e, or AS I. Fu rn ish the
Seri al No. and Ca tal og No. from the tr ans fer s wi tch na mepl ate .