Emerson 3000 instruction manual World Class, Instruction Bulletin, Symptom

World Class 3000

Instruction Bulletin

Appendix B Rev. 2.3 May 2005

SYMPTOM

HEATER DOES NOT HEAT

UP (DOES NOT INCREASE

IN OUTPUT).

SET METER* FOR 50 VAC.

PLACE PROBES ON TERMINAL BLOCK J2, “FROM PROBE”, PROBE HEATER.

METER INDICATES
PULSATING NOMINAL	NO
44 VAC.

SET METER TO 250 VAC.

PLACE METER PROBES ON J2, “FROM ELECTRONICS”, ANALOG HEATER.

METER SHOULD REGISTER A PULSATING NOMINAL 115 VAC.

YES

DISCONNECT POWER TO HPS AND PROBE ELECTRONICS. CHECK ALL FOUR FUSES IN HPS.

NO

CHECK FUSES IN PROBE ELECTRONICS.

IF FUSES OK, POSSIBLE PROBE ELECTRONICS TRIAC FAILURE.

YES

DISCONNECT POWER FROM HPS & PROBE ELECT. SET METER ON RX1.

MEASURE RESISTANCE OF HEATER BY PLACING PROBES ON TERMINAL BLOCK J2, “FROM PROBE”,

PROBE HEATER.

RESISTANCE MEASURED SHOULD BE NOMINALLY 12 OHMS.

NO

FUSES BLOWN IN HPS.

YES

CHECK THAT LINE VOLTAGE IS CORRECT BY SELECTING CORRECT JUMPERS ACCORDING TO CHART ON INSIDE OF HPS COVER.

REPLACE BLOWN FUSES.

HEATER IS OPEN.

REPLACE HEATER.

NO	CHECK JUMPER JM2 IS
	INSTALLED.
		YES
	POSSIBLE TRIAC FAILURE.
	REPLACE HPS
	MOTHERBOARD.

*SIMPSON MODEL 260 OR EQUIVALENT MULTIMETER.

35730004

Figure B-4. HPS Troubleshooting Flowchart, #1

Rosemount Analytical Inc. A Division of Emerson Process Management Appendices B-5