Troubleshooting Guide

SYMPTOMS

PROBABLE CAUSE

CORRECTION

System is not operating and system light is not lit.

Display is not lit and power switch is on.

System is not operating, Temperature Standby on display.

Error! – SMTS-1 on display and system not operating.

Error! – SMTS-1 on display after corrections made.

Error! – SMPS-1 on display and system not operating.

No Power to SMMC-3

Supply not energized or power input fuse burned out.

The SMMC-3 is in a standby mode, the ambient temperature outside is above the programmed temperature required to melt snow. There is a communication problem with the temperature sensor

Need to clear SMTS-1 error from SMMC-3 program.

There is a communication problem with the in-ground sensor.

Turn on power using switch on front panel.

Check power supply. If LED above power input terminal connection is not lit, replace fuse (4A spare fuse ) supplied with SMMC-3.

NORMAL OPERATION

Make sure the temperature sensor lead wires are connected to the terminal properly. If the sensor wire has been extended, use 3 Conductor Instrumentation Cable, #18AWG, unshielded, common conductors such as twisted pair communications wire, telephone wire, electrical building wire and doorbell wire is not acceptable. Manufacturer: Belden #5301UE or equal.

Turn off system using the front panel switch, wait 10 seconds and turn on again. The SMMC-3 should now recognize the sensor.

Make sure the in-ground sensor lead wires are connected to the terminal properly. If the sensor wire has been extended, use 4 Conductor Instrumentation Cable, #18AWG, shielded, common conductors such as twisted pair communications wire, telephone wire, electrical building wire and doorbell wire is not acceptable. Manufacturer: Belden #9418 or equal.

The aerial or gutter sensors are wet	Possible communication problem
(covered in snow), the LED above	with the aerial or gutter sensor. No
the corresponding terminal block is	error message will show on the
lit and the system is not heating.	display when this occurs.

The in-ground sensor is wet	The surface of the in-ground sensor
(covered in snow), the sensor	may be dirty, possibly covered with
surface is warm and system is not	sealant.
heating.

Make sure the in-ground sensor lead wires are connected to the terminal properly. If the sensor wire has been extended, use 3 Conductor Instrumentation Cable, #18-20AWG, shielded or unshielded, common conductors such as twisted pair communications wire, telephone wire, electrical building wire and doorbell wire is not acceptable. Manufacturer: Belden #8770 or equal.

Clean the sensor surface to get rid of any contaminant, use mild detergent and carefully scrub with steel wool.

PO. Box 726 n TULSA, OK 74101 n TEL 918-627-5530 n FAX 918-641-7336 n www.nelsonheaters.com

GA-2318, R1

Sheet 12 of 15

May 2008

SMMC-3 specifications

Emerson SMMC-3 is a cutting-edge controller designed to enhance the efficiency and reliability of industrial automation processes. This smart motor management controller is specifically engineered to optimize the operation of motors and related systems, making it a crucial component in various industrial applications.

One of the standout features of the SMMC-3 is its advanced motor protection capabilities. It provides comprehensive protection against common motor faults such as overloads, phase failures, and short circuits. This ensures that the motors operate within safe parameters, thereby prolonging their lifespan and reducing maintenance costs. The SMMC-3 can be easily configured to meet specific application needs, making it versatile for a wide range of industries.

In addition to protection, the SMMC-3 offers real-time monitoring and diagnostics. It utilizes built-in sensing technologies to continuously monitor key motor parameters, including voltage, current, frequency, and temperature. This data is critical for predictive maintenance, allowing operators to anticipate potential issues before they escalate into costly downtime or equipment failure.

The SMMC-3 supports various communication protocols such as Modbus RTU and TCP, allowing for seamless integration into existing control systems. With its communication capabilities, users can easily access performance data remotely, facilitating better decision-making and resource management.

Another noteworthy characteristic of the SMMC-3 is its user-friendly interface. The device features an intuitive display and menu structure, making it straightforward for operators to configure settings, view performance metrics, and troubleshoot any issues. This ease of use significantly reduces training time and enhances overall operational efficiency.

Moreover, the SMMC-3 employs advanced algorithms and technologies for energy management. It helps in monitoring energy consumption, identifying inefficiencies, and providing recommendations for energy savings. This capability is increasingly important in today’s industrial environment, where reducing energy costs is a top priority.

In summary, Emerson SMMC-3 embodies state-of-the-art technologies and features that elevate motor management in industrial automation. With its robust protection mechanisms, real-time monitoring, versatile communication options, user-friendly design, and energy management capabilities, the SMMC-3 is an invaluable asset for industries striving for operational excellence and sustainability.