Kohler Decision-Maker 550 User Manual

47Section 3 Decision-Makerr 3+ TroubleshootingTP-6356 4/12
3.3 Fault Shutdowns
If the generator set will not start or stops running
because of a fault shutdown (fault lamp lit), see
Figure 3-10 to identify fault conditions. Figure 3-10
contains the logic schematic showing input/output
circuits for reference in troubleshooting. Consult the
engine service manual for detailed information on
correcting engine related faults. To reset the unit after a
fault shutdown, see the generator set operation manual.
Indicator
Generator Set
Mode
Fault Condition/Causes
High Engine Temperature
Lamp Lights
While running
* Engine coolant temperature is above shutdown range. See Section 1, Specifications.
Lead 34 grounded.
Low Oil Pressure Lamp
Lights
While running
* Engine oil pressure is below shutdown range. See Section 1, Specifications
Lead 13 grounded.
Overspeed Lamp Lights While running
* Governed frequency is in excess of 70 Hz on 60 Hz models or 60 Hz on 50 Hz
models. Some 50 Hz models have shutdown at 70 Hz.
Overcrank Lamp Lights
While cranking
Continuous cranking is more than 30 seconds and no starting.
Cyclic cranking is more than 75 seconds and no starting.
(15-second cycles alternating between crank and rest)
While cranking or
running
Speed sensor signal (locked rotor) is absent longer than 15 seconds.
Engine fails to turn over within 15 seconds after signaled to start.
Overcrank Lamp Flashes While running Speed sensor signal (locked rotor) is absent longer than 1 second.
Auxiliary Lamp Flashes
While running No AC output is present.
While running or
in auto position
Battery power was reconnected or was low and then came back up again while
generator set master switch was in the RUN or AUTO position. Improper master switch
signal to controller main circuit board.
Auxiliary Lamp Lights
While shutdown
Optional emergency stop switch is reset while the generator set master switch is in the
RUN or AUTO position.
While running
High oil temperature (P1--13), low coolant level (P1--14), or auxiliary delay shutdown
(P1--15) faults occur, if sensor equipped.
Overvoltage shuts down the unit when the voltage is at least 15% greater than nominal
voltage for period longer than two seconds. Actual overvoltage shutdown is dependant
upon R42 setting on main circuit board. Factory setting is 15% above nominal voltage.
* Activated by customer-supplied sensing device connected to auxiliary immediate
shutdown ports (P1--17 and P1--18).
Activated by engine ECM fault detection.
Emergency Stop
(if equipped)
While running or
in auto position
* Emergency stop switch is activated (local or remote).
* Emergency stop switch(es) are disconnected from controller terminals TB1-1 or 1A.
Multiple Lamps Light
(where illumination may
only appear dim)
While running or
in auto or off/reset
position
Main circuit board F1 (3 amp) fuse blown. F1 fuse supplies battery voltage to a remote
annunciator and/or dry contact kit.
Defective remote annunciator and/or dry contact kit.
Defective indicator panel circuit board.
* Immediate shutdown (ISD)
Figure 3-10 Fault Shutdown Troubleshooting Chart

Kohler Decision-Maker 550 Specifications

General

Brand	Kohler
Model	Decision-Maker 550
Category	Portable Generator
Language	English