Symptom or Error & Error Code
Possible Cause
Measures to be taken
Synchronism loss
(Ex13)
Phase U, V, W thyristor
(Ex14)
(Ex15)
(Ex16)
Heatsink thermostat
(Ex17)
Motor thermistor
(Ex18)
Phase U, V, W loss
(Ex19)
(Ex20)
(Ex21)
Stalled rotor
(Ex22)
Check
1L1
phase
Check thyristor module
Check
2T1, 4T2
and
6T3
phases
No output phases
Shortcircuited thyristor
Phase
1L1
lost
Check thermostat and wiring
Heatsink thermostat tripped by overheating or
defective
Check thermistor and wiring
Motor thermistor tripped by overheating or defective
Check power wire harness for
1L1, 3L2, 5L3,
2T1, 4T2
and
6T3
No input / output phases
Verify gate and cathode wire
harness. Verify thyristors
Defective thyristor or bad wire harness
Restart equipment and check for an appreciable loss in
motor speed at any time (i.e. when the motor is loaded.
In this case, try jumping the bypass terminals
3-57
at the
end of acceleration ramp).
Equipment detected stalled motor rotor
Internal error
(Ex23)
Long start time
(Ex25)
Long slow speed time
(Ex26)
Avoid this condition
Equipment has been in slow speed mode more
than 120 sec.
Check IC1 and IC8 are correctly inserted in
their sockets
Microcontroller malfunction
Increase current limit and / or acceleration
ramp time
Current limit condition present more than
2 x ta sec. or 240 sec.
(ta = acceleration ramp time)
5. Installation
S
L
10 ohms
3 to 6V
3 to 6V
Testing
lamp
1L1 (3L2 or 5L3)
2T1 (4T2 or 6T3)
5-4
5-5. Thyristor check
Shortcircuit
Use a testing lamp to check the defective power module between input and output phases.
If the lamp goes on, at least one of the thyristors has a shorcircuit.
Check with a tester the value or the R resistance between input and output of the same phase (connector
B on main PCB must be previously removed)
If R < 50K
Ω
, at least one of the thyristor is defective
Open thyristor
With the simple assembly shown, the lamp should light when the S switch is closed and remain lite when
open.
If not, the thyristor is defective.
Lock-out
(Ex27)
Check is settings are correct
This protection may be disabled
The time between startings is less that the
adjusted in parameter "LKxx"
Undervoltage
(Ex28)
Overvoltage
(Ex29)
Check is settings are correct.
This protection may be disabled
The line voltage exceeds of limit set in
parameters "UVxx" or "OVxx"
Undercurrent
(Ex30)
Overcurrent
(Ex31)
Check is settings are correct.
This protection may be disabled
The motor current exceeds of limit set in
parameters "UCxx" or "OCxx"
Retry
(Ex32)
Check last message "e1xx" and correct.
Be sure that retry settings are correct as well.
The retry feature could not re-start the motor
after a fault
