SVRS eMod Motor Maintenance

Operating Fault

If a fault occurs while the eMod is in the running mode, the motor will be turned off and the red LED will flash. After two minutes, the module will attempt to re-start the motor. After the three minute startup lockout, or if the circuit senses that the pump is primed, the unit will once again start monitoring motor input power. If conditions are still not normal, the unit will fault out again. The eMod will attempt to restart like this four times. After the fourth attempt, the module will go to lockup mode. In lockup mode the red LED will be on. The only way to get out of lockup mode is to cycle power to the motor.

Faults that the eMod will attempt to recover from are:

• Motor input power too low
• Motor input power too high
• Motor current too high
• Motor temperature too high
• Power line voltage too low
• Circuit power supply fault
• Momentary loss of power

If the motor runs normally for at least nine minutes when the eMod returns to run mode, the fault counter will be reset back to zero. This means that it will now require five new faults to reach lockup mode again. 

Fault Mode

If the eMod faults and goes immediately to a steady red LED condition, this means the fault that was detected was critical, and the eMod went to lockup mode. The only way to get out of lockup mode is to cycle power to the motor.

The faults that are considered critical are:

• Power line voltage too high
• Ambient temperature too low
• Microprocessor fault
• Reset switch is stuck closed
• Bypass mode switch is stuck closed

The eMod performs a self check of its electronic circuits on startup. If upon application of power to the eMod, it immediately goes to the fault condition, it is likely faulting on a failure of one of these circuits. Allow 15 or 20 minutes for the circuitry and motor to cool down if excessive running temperature is suspected. If the fault will still not clear, the eMod system will need to be replaced.

The self check faults include:

• Circuit power supply fault
• Ambient temperature too low
• Microprocessor fault
• Software fault
• Line voltage sense circuitry not working
• Motor current sense circuitry not working
• Motor control relays stuck

LED Indicator Map

eMod Load Sensing Module Specifications

Imput Pwer

Environment

Enclosure

Other

**Note: 50 Hz operation will result in incorrect timing. The eMod is rated for only 60 Hz operation at the present time.