TROUBLESHOOTING
710-14888-00C EMX4i User Manual 113
Possible cause/Suggested solution
Current imbalance
Current imbalance can be caused by problems with the motor,
the environment or the installation, such as:
• An imbalance in the incoming mains voltage
• A problem with the motor windings
• A light load on the motor
• A phase loss on input terminals L1, L2 or L3 during Run mode
• An SCR that has failed open circuit. A failed SCR can only be
definitely diagnosed by replacing the SCR and checking the
starter's performance.
Related parameters: 5A, 5B, 6C
Current Read Err Lx
Where 'X' is 1, 2 or 3.
Internal fault (PCB fault). The output from the CT circuit is not
close enough to zero when the SCRs are turned off. Contact your
local supplier for advice.
Related parameters: None
Depth Sensor
The smart card has detected a fault with the depth sensor.
Related parameters: 30L, 36C
EEPROM fail
An error occurred loading data from the EEPROM to RAM when
the keypad powered up. If the problem persists, contact your
local distributor.
Related parameters: None
Excess start time
Excess start time trip can occur in the following conditions:
• parameter 1B
Motor Full Load Current
is not appropriate for
the motor
• parameter 2D
Current Limit
has been set too low
• parameter 2B
Start Ramp Time
has been set greater than the
setting for 5O
Excess Start Time
• parameter 2B
Start Ramp Time
is set too short for a high
inertia load when using Adaptive Control
Related parameters: 1B, 2B, 2D, 3D, 3F
Firing Fail Px
Where 'X' is phase 1, 2 or 3.
The SCR did not fire as expected. The SCR may be faulty or there
may be an internal wiring fault.
Related parameters: None
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