Control Panel Troubleshooting - Westerbeke 12C- TWO Operator's Manual

CONTROL PANEL TROUBLESHOOTING
MANUAL STARTER DISCONNECT (TOGGLE SWITCHES)
NOTE: The engine contro(system is protected
by
a 20 amp manual reset circuit breaker
located
on
the engine as close as possible
to
the power source.
Problem Probable Cause Verilication/Remedy
PREHEAT depressed, no panel Indications 1.
Oil Pressure switch.
1. Check switches andlor battery connections.
fuel solenoid, electric fuel pump and
preheat solenoid not energized. 2. 20 amp circuit breaker tripped. 2. Reset breaker. If it opens again, check preheat solenoid
circuit and run circuit for shorts to ground.
START SWITCH DEPRESSED, no starter 1. Connection to solenoid faulty. 1.
Check connection.
engagement.
2. Faulty swilch. 2. Check switch with ohmmeter.
3 .. Faulty solenoid. 3. Check that 12 yolts are present at the solenoid connection.
4. Loose battery connections. 4. Check battery conneotions.
5 Low battery. 5. Check battery charge state.
NO IGNITION, cranks, does not slart.
·1. Faulty fueling syslem. 1. Check for fuel.
2. Check for air In Ihe fuel system. 2. Allow system to bleed.
3. Faulty fuel lift pump.
3. Replace fuel Uft pump.
NOT CHARGING BATTERY 1. Faulty alternator drive.
1. Check Ihe
d~ve
belt and Its lension. Be sure the alternator
lurns freely. Check for loose connections. Check Ihe
output with a voftmeter. Ensure 12V are present at Ihe
regulator lerminal.
BATTERY RUNS DOWN 1. Oil pressure switch. 1. Observe
jf
the gauges and panel lights are activated when the
engine is not running. Test the oil pressure switch.
2. High resistance leak to ground.
2. Check Ihe wiring. Insert sensitive (0-.25 amp) meter In battery
lines (Do NOT start engine). Remove connections and replace
after short is located.
3. Low resistance leak to ground.
3. Check all wires for temperature rise to locate the fault.
4. Faulty alternator.
4. After a good battery charging, disconnect alt.ernator at output.
If leakage slops. Remove alternator and bsnch test. Repair or
replace.
TROUBLESHOOTING WATER TEMPERATURE AND OIL PRESSURE GAUGES
If the gauge reading is other than. what is nOlmaJ.Jy indicated
by the gauge when the instrument panel is energized, the first
step is to check for 12 volts DC between the ignition
(B+)
and the Negative
(B-)
tenninals of the gauge.
• Assuming that tilere is 12 volts as required, leave the
instmment panel energized and perfonn the following steps:
1. Discounect the sender wire at the gauge and see if the
gauge reads zero, which is the nOlmal reading for tlris
situation.
2. Remove the wire attached to the sender tenninal at tlle
gauge and connect it to ground. See if the gauge reads full
scale, which is the nonn.l reading for 11ris situation.
If both of the above gauge tests are positive, the gauge is
undoubtedly
OK
and the problem lies eitller with tlle
conductor from the sender to tl,e gauge or with the sender.
If either of the above gauge tests are negative, tlle gauge is
probably defective and should be replaced. .
Assuming the gauge is
QK,
check tlle conductor from the
sender to tlle sender tenninal at the gauge for continuity.
Check that the engine block is connected to the ground.
Some starters have isolated ground !enninals and if tlle
battery is cOimected
to
tlle starter (both plus aud minus
terminals), the ground side will not necessarily be connected
to 11le block.
"tIY'
WESTERBEKE
Engines
& Generators
'37