
7–6
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
FUNCTIONAL TESTS
CHAPTER 7: TESTING
With the thermistor resistance initially set to zero, begin increasing resistance until a
thermistor trip occurs. Note that the Tripped and Stopped LEDs are lit, the contactor A
relay has de-energized, the Running LED is off, and a
THERMISTOR TRIP
message is
displayed. Use an ohmmeter to verify that the thermistor resistance value agrees with the
THERMISTOR HOT
setpoint value. Decrease the thermistor resistance below the
THERMISTOR HOT
value but not below the
THERMISTOR COLD
value. Press the RESET key
and verify that the MM3 Motor Manager 3 still indicates a trip. Reduce thermistor
resistance below the
THERMISTOR COLD
value. Press the RESET key again, noting that the
Tripped LED turns off and the default display message returns. Issue a Start A command
via the keypad or switch input and note that contactor A contacts now close and the
Running LED is lit.
7.2.6
Power Fail Test
To test the power fail circuit, connect the supply voltage to the MM3 Motor Manager 3
through a variac and begin decreasing control voltage. When the control voltage drops
below 80 V for 120 V AC input or 150 V for 240 V AC input, the fault light comes on and the
MM3 Motor Manager 3 ceases to operate. The MM3 Motor Manager 3 has insufficient
voltage to continue accurately monitoring the motor. All output relays will change to their
power off state. Decrease control voltage to zero and then return voltage to its normal
operating level. Verify that the MM3 Motor Manager 3 resumes its normal operation. Check
the power fail memory circuit by verifying that setpoints and statistical data have not been
altered.
Summary of Contents for MM3
Page 8: ...vi MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL TABLE OF CONTENTS ...
Page 18: ...1 10 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL TECHNICAL SPECIFICATIONS CHAPTER 1 INTRODUCTION ...
Page 80: ...4 18 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL CHASSIS MOUNT UNITS CHAPTER 4 SOFTWARE ...
Page 124: ...5 44 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL S7 TESTING CHAPTER 5 SETPOINTS ...
Page 198: ...8 54 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL MODBUS MEMORY MAP CHAPTER 8 COMMUNICATIONS ...
Page 220: ...10 14 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL GE MULTILIN WARRANTY CHAPTER 10 MISCELLANEOUS ...