MJM Yachts 36z Express - Manual (Page 20)

ELECTRONIC)CONTROL)ISSUES)–)KEYLESS)IGNITION)&)JOYSTICKS !
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Recently,!there!were!two!IPS!Joystick!and!DPS!malfunction!incidents!on!40z's:!!ZING!#25!here!in!Newport!and!on!BATEAU!
RELAXEAU!#30!in!Maine.!Here!are!the!lessons!you!can!learn.!
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1)))KEYLESS)IGNITION)SHUTDOWN)SEQUENCE!
I!am!guilty!of!this,!because!it!seems!one!saves!a!step!by!pushing!the!Engine!
STOP!button!to!shutdown!the!engines!and!then!going!below!to!push!Engine!
Battery!switches!OFF.!!!!!WRONG!!!
!!
To!STOP!the!engines,!press!START/STOP!buttons.!Then!for!Volvo,!press!the!
“IGNITION”!button!to!turn!the!panel!OFF!causing!its!light!to!go!out!(On!
Yanmar,!push!the!lower!power!symbol).!!Only!then!do!you!go!below!and!turn!
the!Engine!Battery!Switches!OFF.!!
Note:&&This&must&be&some&Swedish&
language&thing,&because&the&word&"Ignition"&is&misleading.&&It&infers&just&
igniting.&&I've&recommended&that&they&adopt&the&universal&power&symbol&as&on&
the&Yanmar&and&my&MacBook.&&I&would&have&also&advised&Volvo&Penta&to&put&
the&primary&START/STOP&in&the&upper&operating&position,¬&at&the&bottom&
secondary&position&as&these&switches&are&usually&mounted&low&down&to&the&
side&of&the&wheel.
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The!engine!control!system!needs!to!be!SHUT!DOWN!before!the!power!source!
is!removed!by!turning!off!the!battery!switches.!!This!will!shut!down!the!
system!properly,!and!should!prevent!problems!with!either!the!Joystick!or!
Dynamic!Positioning!System!(DPS).!!
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Shown!below!are!the!Volvo!Penta!(Left)!and!!twin!Yanmar!(right)!keyless!
engine!control!switches.!!
NOTE:! !on!the!Yanmar!switches!DO!NOT!PUSH!THE!
RED!EMERGENCY!STOP!to!turn!the!engines!off.!!If!you!do,!see!the!Owner!
Manual!for!restarting!procedure.!!!
!!
2))))REBOOT!!!!!
This!can!solve!any!number!of!mysterious!engine!control!issues.!Electronic!engine!controls!are!not!much!different!than!your!
computer,!iPhone!or!other!electronic!devices.!!90%!of!the!problems!are!probably!caused!by!an!unusual!switching!sequence!
(e.g.!random,&unanticipated&operator&button&pushing)!and!can!be!rectified!by!a!"reboot".!!After!pushing!STOP!to!shutdown!
the!engines:!!Turn!the!Engine!Ignition!Panel!Switches!OFF.!!Then,!go!below!to!turn!the!Engine!Battery!switches!OFF.!!!Be!
sure!the!!Engine!Emergency!Parallel!(EEP)!battery!combiner!switch!is!OFF.!!Also,!turn!the!house!battery!switch!OFF.!!In!other!
words,!shut!down!the!entire!boat.!
!
Wait!at!least!10!seconds!for!the!system!to!sort!itself!out!(My&printer&and&router&called&for&25&seconds).!!Then!turn!!House!
and!Engine!Battery!switches!ON…!but!not!the!EPP.!!!Go!on!deck.!Turn!!Ignition!switches!ON!next!to!the!helm.!WAIT!until!the!
engine!display!is!showing!data!numbers!and!has!gone!through!it's!initial!warm!up.!Then!START!the!engines!and!check!the!
Joystick!Control!functions!(IPS!&!DPS).!
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3)))USE))BATTERY)COMBINERS)TO)OVERCOME)LOW)VOLTAGE!
Upon!turning!ON!the!engine!ignition!switches!next!to!the!helm.!Check!the!
voltage!on!each!engine.!!In!the!case!of!#30,!!the!Port!Engine!had!only!10!
volts!!instead!of!12.5!volts.!!This!creates!alarms,!particularly!when!trying!to!
start!it,!because!Volvo!Penta!electronics!don't!function!below!10!Volts.!!The!
starter,!when!activated,!draws!lots!of!current!and!will!pull!down!the!voltage!
even!lower!and!won't!start.!
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You!might!think!that!it's!a!simple!matter!of!turning!on!the!EEP!switch!(that!
combines!the!two!engine!batteries)!between!the!Engine!Battery!
switches.!!And,!it!would!be!if!there!were!only!a!small!voltage!differential!
reading!on!the!engine!displays.!But!in!this!case,!with!the!port!engine!battery!as!low!as!10!volts,!combing!them!gets!to!a!an!
inadequate!11!volts.!!!
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