10
CIRCUIT OPERATION (for 12VDC battery system)
A detailed description of each KS-105 circuit is provided to address both operational
and troubleshooting questions. Controls Inc technical assistance is also available by
calling 330.239.4345 and asking to speak with a technician. (Please have the product part
number and serial number available.)
Two options for pre-heat timer based on this input being open or
closed to ground:
Not Ground = 4 second Pre-Heat Signal
Ground = 10 second Pre-Heat Signal
Solid state close to ground signal based on engine running condition
(200mA max)
Close to ground output when key is in the “CRANK” position
(This is a close to ground signal circuit to energize the crank relay with a 500mA
max. This circuit is disabled while engine is running.)
12VDC signal from the alternator used to turn the alternator excite
lamp ON
Close to ground signal when key is in the “PRE-HEAT” or “CRANK”
position
(This is a close to ground signal circuit to energize the pre-heat relay with a
500mA max)
12VDC signal to fuel pull circuit when key is in the “CRANK” position
for a max of 5 seconds
(This is a 12VDC signal circuit to energize the fuel pull relay with a 2.1A max)
12VDC signal to fuel hold circuit when key is in the “CRANK” or “RUN”
position
(This is a 12VDC signal circuit to energize the fuel hold relay with a 2.1A max)
Battery negative supply from B- terminal on battery
Input to KS-105 from engine alternator tach output. The speed signal
is used to indicate the engine is running and is required for the panel
to operate the engine properly.
12VDC input to KS-105 from the engine altitude module
Normally open input
Open = Temperature below Yanmar switch specification
Close to Ground = High temperature alarm (engine shutdown)
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