User Manual
EM100 Mini Inverter
102
7. Troubleshooting
7.1 Fault and Corrective Action
When anything unexpected happened, the corresponding trip code and parameters will be
displayed on the keypad. Fault relay is enabled, and fault output terminal is on, and inverter
output stops. When fault occurs, if the motor is running, and it will coast to stop until
stopped. See Table 7-1 for EM100 fault trips and troubleshooting.
Table 7-1 EM100 Fault Trips and Corrective Action
Trip Code
Trip
Cause
Corrective Action
SC
Short
Circuit
1. Short circuit between
inverter output phases, or
between the output
phases and ground.
2. IGBT is damaged.
1. Check, take corrective
actions, and then reset.
2. Technical support
required.
SOC
Stable
Overcurrent
1. Short circuit between
inverter output phases or
between the output
phases and ground.
2. When load is too
heavy, the
acceleration/deceleration
time is too short.
3. In V/F control mode,
the setting value of
torque boost is too big.
4. The motor is rotating
when inverter starts.
5. The capacity of motor
exceeds that of inverter.
1. Check, take corrective
actions, and then reset.
2.Prolong
acceleration/deceleration
time
3. Reduce setting value of
torque boost.
4. Set speed search
enabled.
5. Replace with applicable
motor or inverter.
SOU
Stable
Overvoltage
1. Voltage of power grid
is too high.
2. Decerlation time is too
short.
1. Lower voltage to the
rated voltage.
2. Prolong the deceleration
time.
SlU
Stable
Undervoltage
1. Input power phase
loss.
2. Wiring terminal of
input power is loose.
3. Voltage fluctuation of
input power is too big.
4. Switch contact of
input power is aging.
1. Check input power
supply.
2. Tighten screws on input
terminals.
3. Check air switch and
contactor.
IlP
Input Phase
Loss
Input power phase loss.
1. Check input power
supply.
2. Check wiring of input
power supply.
3. Check if wiring terminal
is loose.
