Operation0850−1/A1
Winterthur Gas & Diesel Ltd.
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Failure Text
ME waste heat recovery valve #2 not closed (ID 3.4.)
FCM−20 No. LED Failure ID Display
Indication #06 None 234 3.4.
Cause Waste heat recovery valve #2 (second valve) is not closed. A command to close the second
valve was sent to the valve, but the sensor responses that the valve is in the open position.
Procedure ⇒ Do a check of the position valve ZV7078C.
⇒ Make sure that the cables between the FCM-20 #06 and position valve ZV7078C have no
damage and are connected correctly.
⇒ If necessary, repair or replace the damaged cables.
⇒ If necessary, replace the position valve ZV7078C.
Failure Text ME waste heat recovery valve #2 not open (ID 4.9.)
FCM−20 No. LED Failure ID Display
Indication #07 None 249 4.9.
Cause Waste heat recovery valve #2 (second valve) is not open. A command to open the second
valve was sent to the valve, but the sensor responses that the valve is in the close position.
Procedure ⇒ Do a check of the position switch ZS5373C.
⇒ Make sure that the cables between the FCM-20 #07 and position switch ZS5373C have no
damage and are connected correctly.
⇒ If necessary, repair or replace the damaged cables.
⇒ If necessary, replace the position switch ZS5373C.
4.6 WECS Common Failure
Failure Text ME scavenge air pressure sensor #1+2 meas. fail. (ID 9)
FCM−20 No. LED Failure ID Display
Indication #03 and #04 AI2 9 9
Cause The two sensor signals are less than 2 mA, or more than 22 mA.
Procedure ⇒ Do a check of the pressure transmitters PT4043C and PT4044C for damage.
⇒ In E12, E95.03 and E95.04, use a multimeter to do a check of the 24 VDC supply on the plugs
(X27, terminals 94 and 96) and the transmitter plugs (2+/1−).
⇒ Do a check of the cables between the pressure transmitters (PT4043C / PT4044C) to E12,
E95.03 and E95.04.
⇒ If necessary, repair the cables between the pressure transmitters (PT4043C / PT4044C) to
E12, E95.03 and E95.04.
⇒ If necessary, replace the pressure transmitters PT4043C and PT4044C.
FCM−20 No. LED Failure ID Display
Indication #03 and #04 AI2 9 9
Cause The sensor power supply has a short circuit (red LED).
Procedure ⇒ Disconnect the pressure transmitters PT4043 and PT4044C and the plugs X27
⇒ Use a multimeter to measure the cables between the plug X27 terminals 94 and 95 and
ground for short circuit or ground fault.
⇒ Replace damaged cables, or temporarily repair with insulation tape until spares are available.
⇒ Measure the transmitters for a ground fault. If necessary, replace the transmitters.
⇒ If the failure ID 9 stays on when the plug X27 is disconnected, replace the related FCM−20.
2014
Failures and Defects of WECS Components
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