Group 30 Electrical system Marine Diesel engines D1-13 B • D1-20 B D1-30 B • D2-40 B D2-55 D • D2-55 E D2-75 B • D2-75 C Contents Safety information ..........2 Malfunctions ............20 Introduction ............... 2 Oil pressure (engine) warning ......... 21 Check MDI output for oil pressure switch ...
This workshop manual contains technical data, de- If work is done adjacent to a running engine, a care- scriptions and repair instructions for the Volvo Penta less movement or a dropped tool can lead to personal products or product versions noted in the table of injury in the worst case.
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Group 30: Electrical system Safety information Only start the engine in a well- ventilated area. Make sure that oil and fuel soaked rags, and When operated in a confined space, exhaust used fuel and oil filters are stored in a safe fumes and crankcase gases must be ventilated place.
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When using a lifting device two people are usually required to do the Only use the fuels recommended by Volvo Pen- work, one to take care of the lifting device and ta. Refer to the Instruction Book. Use of fuels...
IMPORTANT! Delayed or inferior care/mainte- nance, and the use of non-original spares,parts Spare parts for electrical- and fuel systems are sub- means that AB Volvo Penta can no longer be ject to various national safety requirements, such as responsible for guaranteeing that the engine U.S.
Volvo Penta Original Spares are used for the course foresee everything, because service work is engine. The stated service intervals in the Mainte- done in highly varying circumstances.
Design and function Group 30: Electrical system The MDI system The MDI is located on the engine and is connected to a number of nearby components, such as sensors, switches, button panel and instruments. A data link (CAN bus) links the MDI to the tachome- ter/display and other optional equipment such as NMEA2000 interface, multisensor.
Group 30: Electrical system Design and function Component location Basic instrumentation De luxe instrumentation https://www.boat-manuals.com/...
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Design and function Group 30: Electrical system 5, 6, 7 NOTE! The engine on these pictures is a D1-13 but the component location is the same on D1- 20, D1-30, D2-40, D2-55, D2-75. 1. Glow plugs 2. Stop solenoid 3. Coolant temperature sensor 4.
Component description The MDI* is connected to sensors and switches on the engine. The MDI uses easylink instruments and/ or the Volvo Penta EVC display to present informa- tion. To the MDI a button panel is connected that controls the start and stop function of the engine.
Component description Group 30: Electrical system Stop solenoid The stop solenoid is an electromagnetic relay. When the stop button is pushed the stop solenoid is activat- ed by the MDI. The stop solenoid shuts off the fuel supply at the injection pump. Glow plugs One glowplug per cylinder is installed in the cylinder head.
Group 30: Electrical system Component description Alternator The alternator provides alternating current (14V/ 115A). The voltage regulator on the alternator is provided with a sense system. The sense system compares the charge voltage be- tween the alternator terminals, B+ and B-, with the voltage across the battery positive and negative ter- minals.
Repair instructions Group 30: Electrical system Repair instructions Turn the main switches off or disconnect the bat- General advice tery cables during quick charging of the batteries. The following advice must be followed to avoid dam- NOTE! During normal floating charging, it is not age to the MDl unit and other electronics.
Group 30: Electrical system Repair instructions Electric welding Remove the positive and negative cables from the batteries. Then disconnect all cables connected to the alternator starter motor ,MDI. Always connect the welder earth clamp to the compo- nent to be welded, and as close as possible to the weld site.
Repair instructions Group 30: Electrical system Checking alternator brushes Brush dismounting Pull out the black plastic lid. Use a screwdriver to snap of the plastic lid over the brush holders. Disassemble the two torx screws that holds the two brush holders. Pull out the brushes.
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Group 30: Electrical system Repair instructions Measure the brush length. If the brush is worn be- yond the wear limit line (5mm) it must be replaced. Brush mounting When mounting the brush be sure to positioning it as shown in the picture. https://www.boat-manuals.com/...
Repair instructions Group 30: Electrical system Checking the charging system Fault tracing charging system Special tools: 9812519 Battery 1. Check that all connectors at the battery is correct Generally about alternators: assembled. The voltage output from an alternator must be limited 2.
Group 30: Electrical system Repair instructions Checking the instruments Special tools: Multimeter 9812519 The instruments are of the Easy-Link type and re- ceive their signals via a serial bus. The cables con- nected to the instrument consist of a total of 3 con- ductors, battery positive, battery negative and a data bus.
Malfunctions Group 30: Electrical system Malfunctions Symptom Action Alarm can not be acknowledged. see section “Button panel fault”. Charging problems. see section “Battery warning” or see section “Checking the charging system”. Coolant alarm. see section “Coolant temperature warning”. Engine does not start. see section “Start/preheat warning”.
Group 30: Electrical system Malfunctions Oil pressure (engine) warning Fault indication Tachometer: The tachometer LCD screen will show a flashing oil pressure icon and the alarm buzzer sounds. Alarm display: The oil pressure indication flashes in the alarm dis- play + audible warning. Circuit description The oil pressure in the engine is monitored by a pres- sure switch.
Malfunctions Group 30: Electrical system Suitable action 1. Check the oil level in the engine and the oil quality. 2. Check that the oil filter is not blocked. Change oil filter and engine oil. 3. Check that no leakage occurs. 4.
Group 30: Electrical system Malfunctions Coolant temperature warning Fault indication Tachometer: The tachometer LCD screen will show a flashing cool- ant temperature icon and the alarm buzzer sounds. Alarm display: The coolant temperature indication flashes in the alarm display + audible warning. Circuit description The coolant temperature sensor consists of a ther- mistor.
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Malfunctions Group 30: Electrical system Fault tracing Fault condition Coolant temperature exceeds +110 °C (+230 °F) for more than 15 seconds. Possible reason • Low coolant level. • Blocked sea water filter or sea water intake. • Worn impeller in seawater pump. •...
Group 30: Electrical system Malfunctions Measurements Check MDI output for coolant temperature sensor Special tools: Multimeter 9812519, Adapter cable 88890016, Measurebox 9998699 1. NOTE! Cut the current with the main switch. 2. Connect adapter cable 88890016 with measure- box 9998699 between the MDI and the engine connector.
Malfunctions Group 30: Electrical system Check coolant temperature sensor Special tools: Multimeter 9812519, Adapter cable 88890016, Measurebox 9998699 NOTE! Cut the current with the main switch. Connect adapter cable 88890016 and the mea- surebox 9998699 and with the engine connec- tor.
Group 30: Electrical system Malfunctions Multilink fault Fault indication Tachometer: No revolution speed is shown in the tachometer/dis- play. Engine hours might not be visible in the tacho- meter/display. Alarm display: None. Symptom The button panel will function as normal. Circuit description The tachometer and the display recieves information CAN L...
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Malfunctions Group 30: Electrical system Fault tracing Fault conditions 1 The tachometer shows engine hours but not engine revolution due to that no flywheel speed signal is available. Possible reason • Fault in the flywheel sensor cable between the MDI and the sensor. •...
Group 30: Electrical system Malfunctions Measurements Check speed sensor, flywheel Special tools: Multimeter 9812519, Adapter cable 88890016, Measurebox 9998699 Check 1 1. NOTE! Cut the current with the main switch. 2. Connect adapter cable 88890016 and the mea- surebox 9998699 with the engine connector. Do not connect the MDI.
Malfunctions Group 30: Electrical system Check NMEA 2000 Gateway LED There are two light emitting diodes on the interface. One is lit when the NMEA bus has power supply. The other has different lighting options. Constant lit The unit is powered up but receives no communica- tion from any side.
Group 30: Electrical system Malfunctions Fuel level warning Fault indication Tachometer: The tachometer LCD screen will show a flashing warning icon + buzzer sound. Alarm display: The fuel level indication flashes in the alarm display + buzzer sound. Cable description A fuel level sensor can be connected to the MDI , 3- 180 ohm.
Malfunctions Group 30: Electrical system Measurements Check fuel level sensor Special tools: Multimeter 9812519 NOTE! Turn the main switch off. Remove the connector from the fuel level sensor. Use multimeter 9812519 to measure the resistance between the two terminal pins on the level sensor. Nominal values Empty tank (A) ...
Group 30: Electrical system Malfunctions Button panel fault Fault indication Tachometer: None. Alarm display: None. Symptom: No system respons when a button is pushed. Cable description The button panel contains of four buttons: stop but- ton, on/off button, acknowledge/dimmer button, start/ preheat button.
Malfunctions Group 30: Electrical system Measurements Check button panel Special tools: Multimeter 9812519, Adapter cable 88890016, Measurebox 9998699 1. NOTE! Cut the current with the main switch. 2. Connect adapter cable 88890016 with measure- box 9998699 towards the button panel. 3.
Group 30: Electrical system Malfunctions Stop solenoid fault Fault indication Tachometer: The tachometer LCD screen will show a flashing warning icon and the alarm buzzer sound. Alarm display: The warning indication flashes in the alarm display + audible warning. Symptom The engine can not be shut down by pressing the stop button.
Malfunctions Group 30: Electrical system Measurements Check MDI output for stop solenoid Special tools: Multimeter 9812519, Adapter cable 88890016, Measurebox 9998699 1. NOTE! Cut the current with the main switch. 2. Connect adapter cable 88890016 with measure- box 9998699 between the MDI and the engine connector.
Group 30: Electrical system Malfunctions Start / preheat warning Fault indication Tachometer: The tachometer LCD screen will show a flashing warning icon and the alarm buzzer sound. Alarm display: The warning indication flashes in the alarm display + audible warning. Symptom The engine will not start/crank when pressing the start button.
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Malfunctions Group 30: Electrical system Fault tracing Preconditions: If preheating is activated the preheat symbol will be visible in the tachometer and/or the display. Fault conditions 1 The engine does not crank when the start/preheat button is pushed. Possible reason •...
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Group 30: Electrical system Malfunctions Measurements Check MDI output for starter solenoid Special tools: Multimeter 9812519 1. NOTE! Cut the current with the main switch. 2. Loosen the rubber protection hood over the starter output at the MDI to be able to do a measurement. 3.
Malfunctions Group 30: Electrical system Battery warning Fault indication Tachometer: The tachometer LCD screen will show a flashing bat- tery icon and the alarm buzzer sound. Alarm display: The battery indication flashes in the alarm display + audible warning. Fault tracing Fault condition 1 The voltage input at the MDI is 15V or higher for more than 30 seconds.
Group 30: Electrical system Malfunctions Fault condition 2 The voltage input at the MDI is 13V or less for more than 10 seconds (engine running). Possible reason • Too slack alternator belt tension. • Faulty assembled connectors. • Poor condition of the cables in the charging sys- tem.
Group 30: Electrical system Wiring diagram Pin configuration, MDI Button panel Multi link 1 CAN L 1 Stop 2 CAN L 2 On / Off 3 CAN H 3 Ack / Dim 4 Multilink negative supply 4 Battery negative 5 CAN H 5 Start / Preheat 6 Multi link power supply 6 Buzzer...
Technical data Group 30: Electrical system Technical data Electrical system System voltage ..............12 V Battery capacity (starter battery) D1-13-B, D1-20-B, D1-30-B ..........70 Ah D2-40-B, D2-55-B, D2-75-B ..........88 Ah Alternator Voltage output at +20 °C (+68°F) with sense ..............14.2 ± 0.15 V without sense ..............
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....................................................Refers to publication: ............................. Publication no: ............... Date of issue: ..............Suggestion/Motivation: ..................................................................................................................................................................................................................................................................................................................Date: ..............Name: .............. AB Volvo Penta Technical Information Dept. 42200 SE-405 08 Göteborg Sweden https://www.boat-manuals.com/...