Siemens MCC-3298 user manual Troubleshooting

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4 Troubleshooting

4Troubleshooting the SAMMS-LV Device

This section discusses how to troubleshoot the SAMMS-LV device. The troubleshooting guide below lists basic errors that can occur while operating the SAMMS-LV device. Use the guide as necessary to solve error conditions as they arise. Do not attempt to solve any error condition that is not listed in the troubleshooting guide. Instead, contact your Siemens repre- sentative.

Note: When contacting your Siemens representative, refer to the SAMMS-LV production control label to identify production date, hardware version, and software version. This label is mounted on the right side of the unit when viewed from the front. For example, 93-250-456-01/03 represents a device that was produced in 93, the 250th day of the year, unit number 456, hardware version 01, and software version 03.

		Troubleshooting Guide

Error Condition		Main Cause		Remedy

Current Unbalance		Current unbalance LED is illuminated if	1.	Correct the cause of voltage or load unbalance.
		current unbalance exceeds 40%, or it
		flashes if current unbalance is between	2.	Verify current transformer secondary voltage is
		20 and 40%. Current unbalance may		unbalanced at SAMMS-LV terminals 1, 2, and 3 with
		be due to voltage or load unbalance.		reference to 4.
Overload Trip		Indicates motor exceeded winding,	1.	Verify that the full load current F4 and service factor
		housing, or rotor temperature		F6 on the HHC matches the full load current and the
		threshold.		service factor on the motor nameplate.
			2.	If the motor tripped during start, increment the
				overload class one step and start again. If still
				unsuccessful, the motor’s rotor may be locked or
				stalled. Correct motor malfunction before restarting.
			3.	If the motor tripped after running for a period more
				than the overload class selected, the trip may be due
				to a running overload such as excessive loading on a
				conveyor belt or bad bearings. Remove the cause of
				the overload before restarting the motor.
			4.	F16 on HHC displays the most recent overload trip
				current value.

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Contents SAMMS-LV Qualified Person Contents Qualified Person Signal WordsField Service Operation About this Manual Advanced Protection for Low-Voltage Motors SAMMS-LV Device ModelsProgramming Control Circuits Using the Standardized Control PanelOverload Protection SAMMS-LV Model Change settings requires password Yes Remote inputsOutputs One Light barsInstalling the SAMMS-LV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-LV device communications connections Using the Reset/Test Push Button Password ProtectionPerforming a Lamp Test Performing an Overload Relay TestInput Devices Output DevicesCustom Ladder Diagrams Ladder Diagrams Library of Standard Ladder DiagramsSAMMS-LVX Standard control circuits RVA Motor Ambient Temperature Ridethrough Upon Loss of Power SAMMS-LVX OnlyIncomplete Sequence Intelligent Reduced-Voltage Starting SAMMS-LVX OnlyODP motor thermal signature Operating the SAMMS-LV Operating the SAMMS-LV Device 10 Motor protection graph Phase Unbalance Ultimate Trip Level and Service FactorDual Overload Protection SAMMS-LVX Only Jam Protection SAMMS-LVX OnlyStator Protection Ground Fault DetectionRepetitive Starts Start InhibitUsing the Hand Held Communicator HHC Autoreset After a Trip SAMMS-LVX OnlySize Pickup Current Default Pickup Range Emergency RestartingJam pickup current F24 Loss of load protection or warning Function Number5A CT primary current if used Full load current for OLR No Function Key Using the Enter KeyList Key UP and Down KeysCapability External trips Enable/disable phase unbalanceStep Size Second Default Value Select ground fault pick-up current Value 2A-5AMeans warning Iflc is the value of Iflc forProgram Mode/Passwords Using the SAMMS-LV Device Func TionsSelect jam pickup current 120-400% I FLC F24 Loss of Load 200% 50% 480013 Entering and changing passwords SAMMS-LV Functions F0 Ambient TemperatureF1 Control Circuit Number and Incomplete Se- quence Status F2 Size for Overload Relay #1F4 Full-Load Current for Overload Relay #1 Overload Setting Step Default Relay Size Range 24.0A 36A45A 90AF8 Autoreset SAMMS-LVX Only F6 Service FactorF9 Phase Unbalance Protection F7 Overload Trip ClassF11 Emergency Restarting F12 Ground Fault Protection or WarningF10 Display Time to Restart F13 Set Programmable Timer #1 F12A Ground Fault Pickup CurrentF14 Set Programmable Timer #2 F15 Display CurrentF17 Current Unbalance F21 Reset Motor DataF18 Display Total Elapsed Run Time of the Motor F19 Number of Motor StartsF23A Jam Pickup Current SAMMS-LVX Only F25 Percentage of Motor Winding TemperatureF24 Loss of Load Protection or Warning SAMMS-LVX Only F24A Loss of Load Pickup Current SAMMS-LVX OnlyF27 Address Troubleshooting Error Condition Troubleshooting Guide Error Condition Appendix a Technical Specifications Overload Specifications Statistical Data Dimensions Catalog Number SAM4 Switch # Function Position Samms Sensor, sizes 1C, 2A, 2B Page Siemens Energy Automation, Inc