Operation0850−1/A1
Winterthur Gas & Diesel Ltd.
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Failure Text
ME Exh. Valve Late/Not Closing (slowdown) (ID 77)
FCM−20 No. LED Failure ID Display
Indication #01 to #09 77 77
Cause
The exhaust valve closes 15_CA or more after the crank angle setpoint
Procedure ⇒ Do a check of the ON times of the rail valve 4.76.
⇒ Make sure that the cables between the rail valve 4.76 and the related FCM-20 have no
damage and are correctly connected.
⇒ Do a check of the the air spring pressure. Make sure that the pressure is not too low.
⇒ Make sure that the non-return valve 4.06 is serviceable.
⇒ Do an internal check of the VCU 4.10 for mechanical failure.
⇒ Make sure that the piston in the exhaust valve drive 4.03 moves freely.
⇒ Do a check of the FCM-20.
⇒ If necessary, replace the FCM-20, VCU 4.10, rail valve 4.76, exhaust valve drive 4.03 or
non-return valve 4.06.
Failure Text ME exhaust valve #nn fail. (ID 78)
FCM−20 No. LED Failure ID Display
Indication #01 to #09 None 78 78
Cause The exhaust valve does not open / close at the WECS setpoint.
Procedure ⇒ The cause of this failure is the failure 75, 76 or 77. For more data, see the related failure IDs.
Failure Text ME Inj. Quantity Piston, Late / No Return (ID 90)
FCM−20 No. LED Failure ID Display
Indication #01 to #09 ExD 90 90
Cause The fuel quantity piston does not go back to its initial position after the injection. (failure signal
released after 30 seconds).
Procedure ⇒ Do a check of the sensor signal from the fuel quantity piston. If the signal is not below 5.5 mA
after the injection, the piston did not go back to its initial position.
⇒ Make sure that the fuel viscosity and temperature is in the permitted range.
⇒ Do a check of the trace heating system.
Remark: If the vessel operates in rough sea, this failure can occur during fast load changes.
Failure Text ME Inj. Quantity Piston, No Movement (slowdown) (ID 91)
FCM−20 No. LED Failure ID Display
Indication #01 to #09 InjQ 91 91
Cause The fuel quantity piston moves less than 4% during the injection
Remark: This alarm is first transmitted after the engine has turned three times.
Procedure Remark: If the engine operates at very low load, this alarm usually occurs because of the
small fuel quantity.
⇒ Do a check of the rail valve.
⇒ Make sure that the fuel viscosity is in the permitted range.
⇒ Make sure that the fuel quantity piston moves freely.
Remark: If the vessel operates in rough sea, this failure can occur during fast load changes.
2014
Failures and Defects of WECS Components
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