Siemens MCC-3298 user manual Troubleshooting Guide Error Condition

4 Troubleshooting

Troubleshooting Guide

Error Condition

Ground Fault

Main Cause

Indicates the ground fault current exceeded the threshold. If ground fault protection was selected, the ground fault LED illuminates solidly and the motor stops. If ground fault warning was selected, the ground fault LED flashes and the motor continues to run.

Remedy

The cause of the ground fault should be determined and removed before using the motor again. F16 on the HHC displays the ground fault trip current.

Ready Light not Illuminated

Improper Remote Operation

Improper Alarm Contact Operation

Improper Light

Operation

Improper Local Operation

Improper Contactor Operation

Cannot Change HHC Settings

Improper

SAMMS-LV

Operation

Usually indicates lack of control power.	1.	Verify the presence of 12 VAC between terminals 5
		and 6 of the SAMMS-LV unit.
	2.	If control power is not present, check the control
		power fuses or the control power transformer and
		replace if defective.
	3.	If control power is present, push the RESET button to
		test lights and unit. If the Ready light does not
		illuminate, call Siemens.
Indicates connection or operator error.	1.	Verify the SAMMS-LV unit is in the Auto mode.
	2.	Verify 115 VAC input at SAMMS-LV terminals 9, 10,
		11, and 12 with reference to 13, and at terminal 7
		with reference to 13.
	3.	If remote operation is intermittent, verify connections
		are made in a manner to avoid noise interference.
		Refer to Section 2 of this manual for instructions.
Indicates connection error.		Verify 115 VAC at terminals 7 and 8 with reference to
		13.
Usually indicates programming error.	1.	Perform lamp test by pressing RESET button.
	2.	Verify ladder diagram.
Operator error.		Verify SAMMS-LV is in Local mode.
Connection error.		Verify 115 VAC at terminal 7 with reference to 13,
		and at output terminals 14, 15, or 16 with reference
		to 13 when the motor is started.
Usually indicates motor is running, or	1.	Verify that the motor is stopped before changing
incorrect password.		parameters.
	2.	Verify that the correct password is in use. If the
		password cannot be determined, call Siemens.
Usually indicates improper grounding		Refer to Section 2 of this manual for instructions.
or noise interference.

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