ACM 400 S motor control unit
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c) Displayed errors
[X2.1], [X5.4]
Code in
the
display
[X2.1]
LED "S"
flashes
[X5.4]
Possible cause
Remedy
E1
1x
control unit:
Watchdog test
negative
Switch off voltage, wait 10sec, switch voltage back on.
If error message remains, a hardware error exists in the control unit.
The control unit must be replaced.
E2
2x
Speed sensor:
No signal
detected 0.5s
after motor start
Renewed motor start. If the error message remains:
a) check connections
b) check sensor type (menu “0“)
c) switch off sensor (menu “0“ set to 00)
d) Replace sensor/control unit
E3
3x
photoelectric
barrier:
Self-test negative
Switch off voltage, wait 10sec, switch voltage back on.
If error message remains:
a) Check setting menu “8“ and “F“ (external LS test) with respect to
connected photoelectric barrier.
b) Check connection of the photoelectric barrier (power supply and
signal output)
c) if a) and b) correct, there is possibly a hardware error in the control
unit. The control unit must be replaced.
E4
4x
safety strips: Self-
test negative
Switch off voltage, wait 10sec, switch voltage back on.
If error message remains:
a) Check sett
ing menu “1“...“4“ with respect to connected safety strip.
b) Check connection of the safety strip (resistance/function)
c) if a) and b) correct, there is possibly a hardware error in the control
unit. The control unit must be replaced.
E5
5x
Motor control: the
gate has not left
the limit switch
within 2s of
starting
Restart motor. If error remains.
Gate won’t move: Check mechanics (motor, transmission, emergency
unlocking, gate frozen)
Gate moves: Check limit switch, contact, wiring.
or speed signal in
idle mode.
Unauthorised speed signal at terminal 19 and 20. Check sensor
possibly switch off (Menu “0“ set to 00) or replace.
E6
6x
control unit: ROM-
test negative
Switch off voltage, wait 10sec, switch voltage back on.
If error message remains, there is a hardware error in the controller.
The control unit must be replaced.
E7
7x
control unit: RAM-
test negative
Switch off voltage, wait 10sec, switch voltage back on.
If error message remains, there is a hardware error in the controller.
The control unit must be replaced.
E8
8x
control unit:
EEPROM test
negative
Switch off voltage, wait 10sec, switch voltage back on.
If the error message remains, the stored value of the control unit is
invalid. The control unit must be reset (see page
Fehler! Textmarke
nicht definiert.
)
E9
9x
The gate was
moved from the
limit position
“Closed“ in idle
mode
a) A break-in attempt exists.
b) The emergency release has been actuated.
c) Limit switch in the limit position no longer actuated
LP
--
undervoltage,
possible overload
The power supply voltage to the control unit is temporarily or
continuously too low.
a) Check mains connection. (measure 230V)
b) Low voltage output overloaded (too many loads connected at
terminals 20-22? Disconnect to check)
c) External control stations not floating
If the cause of the error has been removed, you can quit the error message by
entering the next command (not by radio!).
