Abbreviated Troubleshooting Procedure

P5G-2, P5G-2U, P5CG-2, P5KA2NG-2, P5KA2NCG-2

If troubleshooting in the field, do not remove power from the transformer before looking at the indication on the diagnostic LED.

P5KA2NG-2, P5KA2NCG-2	P5G-2, P5G-2U, P5CG-2

With primary power applied, what is the LED indicating:

Pulse(s)	Indicated Condition	Corrective Procedure
Continuously “Off”	No primary voltage.	Apply primary power.
Continuously “On”	Transformer operating normally.	No detected fault.
Rapid flashing	Transformer in service mode (SCGFP disabled).	Used to troubleshoot a tubing problem. Press “Service” button to enter this mode and refer to the second page of the “Extended Troubleshooting Procedure.”
1	Entering diagnostic mode.	No action required – this condition will disappear after the actual fault is detected.
2	Secondary ground fault exists.	Remove primary power and disconnect the GTO from both high voltage bushings.  Re-apply primary power – if the LED is then continuously on, the transformer is good and a secondary fault exists somewhere in the neon tubing load (refer to the second page of the “Extended Troubleshooting Procedure.”). If the LED continues 2-pulsing, the transformer is defective.
3	Polarity reversed or unit  not grounded in the presence of a ground fault	Remove primary power and reverse line (‘hot”) and neutral wires. Re-apply primary power – if the LED is then continuously on, the transformer is good and the line and neutral were connected to the wrong transformer terminals or the line and neutral wiring was reversed.  Problem is resolved. If the LED continues 3-pulsing, the transformer is poorly grounded and a secondary fault exists somewhere in the neon tubing load (refer to the second page of the “Extended Troubleshooting Procedure.”). Make sure to return the line and neutral wires to their original positions.
4	Over 120% of rated input voltage	If the LED is 4-pulsing, you have probably installed a 120 VAC transformer on a 240, 277, or 480 VAC branch circuit.  Replace with a transformer of correct primary voltage rating (the original transformer is not damaged by the primary over-voltage -- it may still be used elsewhere).

If you feel that the above procedure has not uncovered your problem, go to the “Extended Troubleshooting Procedure” or call (800) 753-2753.