Operation0850−1/A1
Winterthur Gas & Diesel Ltd.
10/ 39
Failure Text
ME servo oil pressure sensor #1 meas. fail. (ID 16)
FCM−20 No. LED Failure ID Display
Indication #01 AI2 16 16
Cause Sensor signal < 2 mA or > 22 mA (failure signal is released after 3 seconds).
Procedure ⇒ On the servo oil rail, do a check of the pressure transmitter PT2071C for damage.
⇒ Use a multimeter to do a check of the 24 VDC supply on the plug X27 (terminals 94+/96−) in
E95.01 and on the transmitter plug.
⇒ If there is a 24 VDC supply, do a check of the cables between the pressure transmitter
PT2071C and E95.01 for correct connections and / or damage.
⇒ Repair or replace damaged cables.
⇒ Use a multimeter to do a check of the sensor signal (X27 terminal 95).
⇒ If necessary, replace the pressure transmitter PT2071C.
FCM−20 No. LED Failure ID Display
Indication #01 AI2 16 16
Cause The sensor power supply has a short circuit (red LED).
Procedure ⇒ In E95.01, disconnect the pressure transmitter PT2071C and the plug X27.
⇒ Use a multimeter to do a check between each of the cables on plug X27 terminals 94 and 95
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 PT2071C for a ground fault. Replace the pressure
transmitter if necessary.
⇒ If failure ID 16 stays on when the plug X27 is disconnected, replace FCM-20 #01.
Failure text ME servo oil pressure sensor #2 meas. fail. (ID 16)
FCM−20 No. LED Failure ID Display
Indication #02 AI2 16 16
Cause Sensor signal < 2 mA or > 22 mA (failure signal is released after 3 seconds).
Procedure ⇒ On the servo oil rail, do a check of the pressure transmitter PT2072C for damage.
⇒ Use a multimeter to do a check of the 24 VDC supply on the plug X27 (terminals 94+/96−) in
E95.02 and on the transmitter plug.
⇒ If there is a 24 VDC supply, do a check of the cables between the pressure transmitter
PT2072C and E95.02 for correct connections and / or damage.
⇒ Repair or replace damaged cables.
⇒ Use a multimeter to do a check of the sensor signal (X27 terminal 95).
⇒ If necessary, replace the pressure transmitter PT2072C.
FCM−20 No. LED Failure ID Display
Indication #02 AI2 16 16
Cause The sensor power supply has a short circuit (red LED).
Procedure ⇒ In E95.02, disconnect the pressure transmitter PT2072C and the plug X27.
⇒ Use a multimeter to do a check between each of the cables on plug X27 terminals 94 and 95
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 PT2072C for a ground fault. Replace the pressure
transmitter if necessary.
⇒ If failure ID 16 stays on when the plug X27 is disconnected, replace FCM-20 #02.
2014
Failures and Defects of WECS Components
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