Operation0850−1/A1
Winterthur Gas & Diesel Ltd.
12/ 39
Indication
FCM−20 No. LED Failure ID Display
#04 AI1 27 27
Cause The sensor power supply has a short circuit (red LED)
Procedure ⇒ In E95.04, disconnect pressure transmitter PT3462C and plug X25
Remark: ID fault FCM−20 #04 comes on
⇒ Use a multimeter to do a check between each of the cables on plug X25 terminals 79 and 80
and ground for a short circuit or ground fault.
⇒ Replace damaged cables, or temporarily repair with insulation tape until spares are available.
⇒ Do a check of the pressure transmitter PT3462C for a ground fault. Replace the pressure
transmitter if necessary.
⇒ If failure ID 27 stays on when the plug X25, is disconnected, replace FCM−20 #04.
Failure Text WECS FCM−20 module cyl. ID lost (ID 33)
FCM−20 No. LED Failure ID Display
Indication #00 to #09 ID 33 33
Cause Identification of jumper setting on X25 is not correct.
Procedure ⇒ Do a check of the cable address on the plug X25 of the related FCM−20.
⇒ If necessary, repair the cables of the identification jumpers on X25 of the related FCM−20.
Remark: If this failure occurs during FCM−20 operation, it will not have an effect on engine
operation
If this failure occurs when the FCM−20 is set to off (or an FCM−20 starts again with this
failure and continues to have this failure), then the FCM−20 in operation will not start its
function again. The related cylinder is cut out.
Failure Text WECS CAN M-bus fail. FCM−20 #01 to #04 (ID 38)
FCM−20 No. LED Failure ID Display
Indication #01 to #04 M 38 38
Cause CAN M-bus monitoring, but FCM−20 #00 is not defective (failure signal is released after
3 seconds).
Procedure ⇒ In the related FCM−20 (plug X22, terminals 55/56) make sure that the cables are connected
correctly.
⇒ In the control box E90, make sure that the bus cables have no damage and the connections
are connected correctly.
⇒ On the PCS (FCM−20 #01 and #02), make sure that the bus cables have no damage and the
connections are connected correctly.
⇒ On ECR manual control panel (FCM−20 #03), make sure that the bus cables have no damage
and the connections are connected correctly.
⇒ On the local manual control panel (FCM−20 #04), make sure that the bus cables have no dam-
age and the connections are connected correctly.
⇒ Make sure that the CAN M-bus cables between the ALM−20 and the FCM−20 of the last two
cylinders have no damage and are connected correctly.
⇒ On the related FCM−20 and control boxes, make sure that the cables, connections and
termination at the related FCM−20 and control boxes have no damage and are correctly
connected.
⇒ If necessary, replace the related FCM−20.
2014
Failures and Defects of WECS Components
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