Error Diagnosis; Error Correction - ASO Safety Solutions ISK 71-24 Manuel D'utilisation

11. Error diagnosis

Only the green LED may illuminate if the supply voltage has been correctly connected. If one of the red
LEDs illuminate, there is an error in the system which can be pinpointed with the aid of the LED.
LED
LEDs are not The supply voltage is missing, too low or
illuminated has been connected incorrectly
A single red LED Contact edge(s) not connected, con‑
is illuminated nected incorrectly or faulty
One of the contact edge connections is
not being used
Both of the red The transmission line is faulty or has
Transmit LEDs
been installed incorrectly
are illuminated
Contact edge(s) not connected, con‑
nected incorrectly or faulty
* If the error is not in the wiring, the function of the electronics can be tested by connecting an
8.2 kW resistor to all SCE inputs on the ISK 71‑24 electronic evaluation system (terminals 3, 10
and terminals 3, 11) and to the travelling coil core (connections O and C). If the electronics work
perfectly after performing the test, the safety contact edges must be checked using an ohmmeter.
To do this, the respective connection on the SCE for the electronic evaluation system or for the
travelling coil core must be disconnected and connected to an ohmmeter.
The resistance must be 8.2 kW ±500 W when the safety contact edge is inactive and must not
exceed 500 W when it is active.
** If both of the LEDs for the travelling SCEs (Transmit Opening and Transmit Closing) illuminate,
there is an error in the inductive signal transmission system. The most frequent causes of these
errors are bad coil core connections, incorrectly installed cable system components (see IKS
safety transmission system assembly instructions) or an impermissibly low supply voltage.
The maximum resistance value of the cable loop must not exceed 3 W . The resistance value can
be measured by disconnecting the steel cable from the ground terminal and then measuring the
resistance between the end of the steel cable and ground terminal.
Error
Check connections and supply voltage:
‑ 24 V A C/DC at terminals 8 9
Tolerance range: ±10%
‑ Check the connections of the corresponding contact
‑ Check safety contact edge(s)*
Any contact edge connections that are not being
used must be permanently bridged using one of the
supplied 8.2 kΩ resistors
‑ Observe the mech. assembly instructions
‑ Check transmission coil cores for abrasion.
‑ Check cable loop; make certain that both trans‑
‑ Check cable / gate leaf contact points.
‑ Check supply voltage**
‑ Check the connections of the corresponding contact
‑ Check safety contact edge(s)*

Error correction

edge (squeezed or brittle supply lines, etc.)
(ISK safety transmission system)
mission coil cores are in the cable loop
edge (squeezed or brittle supply lines, etc.)
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