Plan Boucles De Commande Solénoïde Ac Galsol - YAMIT AF900 Série Manuel D'utilisation Et De Maintenance

AF900
CONTROL UNIT ERROR and FAULT CONDITIONS
• PLC operation - Normally, POW (red) indicator is lit while RUN (green) indicator is blinking
fast. (Note that PLC operation indicators is located on the PLC front panel.)
• MOTOR FAULT. (FAULT indicator lit constantly.) Motor fault caused by it's overload
protection, will cause immediate motor stop, at any location , while FAULT indicator lit
constantly. (PLC inputs indicators – No. X0 lit in case of motor over load malfunction.) In this
case :
a) Reset the overload OL1 by turning the knob left to O position (Release) then back to |
position (Up).
b) Reset the control unit by pressing the FAULT sw.
• DP FLUSH FAULT. (FAULT indicator lit.)
A high differential pressure also can be seen on PLC - DP inlet No. X3 that lit).
In this case, pressing FAULT sw. will reset the system and resume operation.
Note that since a DP still exist the flushing mechanism will execute another REGULAR FLUSH
followed by EMERGENCY FLUSH scans. If a second attempt to remove the DP signal is failed
then manual screen cleaning is required.
• MOTOR limit switches error.
The flushing cycles (scans) executed by the motor movement IN and OUT limit area bordered
with two limit switches. Malfunction in one or both can cause damage to the filter
mechanism.
To avoid this situation the flush mechanism measure the elapsed time required to scan from
LSI to LSO and vice versa.
If a signal from LSI or LSO (Due to malfunction/bad connection) is not registered after the last
measured time , FAULT indicator will blinks , indicating that one or both limit switches
malfunctioned.
In case of LSI /LSO malfunction FAULT indicator will blink.
Note that the control unit will continue to activate the flushing mechanism with last time /
location registered by LSI or LSO.
In this case check and readjust the limit switches as described on chapter E paragraph 2 and
3.
SV3 OPERATION
(factory set on FAULT configuration.)
SV3 serve two purposes according to preset configuration.
• By setting SV3 as a FAULT valve , SV3 will be activates on FAULT State.
In this case it can be used to open a bypass valve.
• By setting SV3 as a FLUSH valve , SV3 will be activates and after preset PRE-FLUSH time the
flush cycle will start.
In this case it can be used to control a down stream valve which enables more
dirt collector sucking ability therefore less time/scans required for successful
flushing.
To configure this option refer to screen no. 1.2.0
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