69
7.5 OPERATIONAL
ALARMS
NOTE:
At all times the Oilcon
®
Oil Discharge Monitoring and Control System must be operated
as directed by MARPOL 73/78 to prevent discharge of oil contaminated water
overboard.
There are necessarily a number of alarm conditions in the MCU. Irrespective of what caused the
alarm, the result is the same. An alarm message will appear on the display alongside whatever
caused the alarm. Also the internal buzzer will sound. A control signal will be sent to stop the ballast
water discharge.
Should any alarm occur during normal operation, the alarm menu is displayed in the screen.
Press the ACK key to will silence the audible alarm and leave the alarm menu.
However the fault must be cleared before any discharge of ballast can take place.
Figure
61
The following alarms can occur:
Alarm
Description
No air
If for any reason there is no air supply to the Oilcon
®
Oil Discharge Monitoring and Control System the NO AIR
alarm is activated.
The system will then return to Standby mode.
Overboard
arrangement failure
The OVERBOARD ARRANGEMENT FAILURE is activated if during operation of the Oilcon
®
Oil Discharge
Monitoring and Control System, in “Control” mode, a mismatch is detected between the overboard valve
command and the overboard valve position indication.
Discharge ratio
If during operation of the Oilcon
®
Oil Discharge Monitoring and Control System the rate of discharge exceeds 30
l/NM the DISCHARGE RATIO alarm is activated.
The system will continue operation in the Sample mode, although the ballast water discharge will be stopped.
According to the Regulations the maximum discharge rate is 30 litres/nautical mile and the discharge rate alarm
level is set to this limit, but may be set to a lower figure, if required. This can be done with the setup menu.
Total discharged
oil limit
If the total discharge oil limit exceeds 1/30,000 of the last cargo carried, the TOTAL DISCHARGED
OIL LIMIT alarm is activated.
The limit is normally set by the operator and is calculated as:
- 1/30,000 of the last cargo carried (for new ships) or
- 1/15,000 of the last cargo (for existing ships).
The result, in litres, is entered in the setup menu.
If this limit is exceeded, no further discharge of ballast water can take place on that particular
voyage.
The TOTAL OIL DISCHARGED can only be reset at the start of a new ballast voyage. (i.e. after a
cargo has been carried and the vessel is again ballasted). A record is logged when the total oil limit
is reset.
Bad shut-down
If during the previous usage of the system the unit was shut-down in an incorrect manner,
(i.e. without going through shutdown flush sequence) then this message will appear briefly on the
display at the next start up. The event will be logged within the systems own internal memory.
CONTROL
Sample point: 1
22-11-11
alarm
Oil type: 5
10:38
ALARM
EPU No communication
EPU: no communication
free: 1927296 kB
ACK
Summary of Contents for OILCON MARK 6M
Page 112: ...111...
Page 113: ...112...
Page 114: ...113...
Page 115: ...114...
Page 116: ...115...
Page 117: ...116...
Page 118: ...117...
Page 119: ...118...
Page 120: ...119...
Page 121: ...120...
Page 122: ...121...
Page 123: ...122...
Page 124: ...123...
Page 125: ...124...
Page 128: ...127 Drawing 1 0806 0005 Sheet 1 2...
Page 129: ...128 Drawing 2 0806 0005 Sheet 2 2...
Page 130: ...129 Drawing 3 0806 1041...
Page 131: ...130 Drawing 4 0806 1075...
Page 132: ...131 Drawing 5 0806 1076...
Page 133: ...132 Drawing 6 0806 1077...
Page 134: ...133 Drawing 7 0806 1260 Sheet 1 2...
Page 135: ...134 Drawing 8 0806 1260 Sheet 2 2...
Page 136: ...135 Drawing 9 0806 1265...
Page 137: ...136 Drawing 10 0806 1267...
Page 138: ...137 Drawing 11 0806 1268...
Page 139: ...138 Drawing 12 0806 1279...
Page 140: ...139 Drawing 13 0806 1285...
Page 141: ...140 Drawing 14 0806 1286...
Page 142: ...141 Drawing 15 0806 1287...
Page 143: ...142 Drawing 16 0806 1288...
Page 144: ...143 Drawing 17 0806 1621...
Page 145: ...144 Drawing 18 0806 1622...
Page 146: ...145 Drawing 19 0806 2032...
Page 147: ...146 Drawing 20 0806 2048...
Page 148: ...147 Drawing 21 0806 2050...
Page 149: ...148 Drawing 22 0806 5019...
Page 150: ...149 Drawing 23 0806 5026...
Page 151: ...150 Drawing 24 0806 8016...
Page 152: ...151 Drawing 25 0806 8023...
Page 153: ...152 Drawing 26 0806 8035...
Page 154: ...153 Drawing 27 0806 8038 Sheet 1 4...
Page 155: ...154 Drawing 28 0806 8038 Sheet 2 4...
Page 156: ...155 Drawing 29 0806 8038 Sheet 3 4...
Page 157: ...156 Drawing 30 0806 8038 Sheet 4 4...
Page 158: ...157 Drawing 31 0806 8039...
Page 159: ...158 Drawing 32 0806 8040...
Page 160: ...159 Drawing 33 0806 8070...
Page 161: ...160 Drawing 34 0810 2010...
Page 162: ...161 Drawing 35 0871 1213...
Page 163: ...162 Drawing 36 0899 1092...
Page 164: ...163 Drawing 37 0899 1163...
Page 165: ...164 Drawing 38 0899 1249...
Page 166: ...165 Drawing 39 0899 1256...
Page 167: ...166 Drawing 40 0899 1258...
Page 168: ...167 Drawing 41 0899 1259...