Kohler 80EOZ/70EFOZ - 7.2 Generator Testing; 7.2.1 No Output On Any Phase

TP-5737 5/0146 Section 6 Decision-Makert 1 Controller Troubleshooting
Function Relay
Relay Contact
Normal Position
Relay Contact
Action
Energizes/Action:
K2 relay and LED2 lights
S
t
t
i
C
l
t
h
t
t
/
t
i
t
h
K2 Open Close
K10 relay (with F-254717) or K5
relay (with E-254717, engine
components (fuel system, governor,
ignition, etc.), K4 relay, and LED4
lights
Starting: Close the start
/
stop s
w
itch
between N and 47.
Note: Fault shutdowns are inhibited during
startup until K3 energizes.
K10
or K5
Open Close
Hourmeter on Decision-Makert 1
and Decision-Makert 1 Expanded
controllers and engine gauges
(battery voltage, water temperature,
and oil pressure) on
Decision-Makert 1 Expanded
controllers
K4 Open Close K20 relay
K20 Open Close Starter motor
Running: Generator winding 7--10
d
A
C
t
t
K3 relay and LED3 lights
g
g
produces
A
C output.
Note: K3 relay must obtain AC output
w
i
t
h
i
n
3
0
s
e
c
o
n
d
s
o
r
o
v
e
r
c
r
a
n
k
f
a
u
l
t
K3 Closed Open
Deenergizes K4 relay and LED4
deenergizes
w
i
t
h
i
n
3
0
s
e
c
o
n
d
s
o
r
o
v
e
r
c
r
a
n
k
f
a
u
l
t
occurs.
K4 Open Open Deenergizes starter motor
Sto
p
p
in
g
: Move the start
/
sto
p
s
w
itch to
Deenergizes K2 relay and LED2
deenergizes
S
t
o
p
p
i
n
g
:
M
o
v
e
t
h
e
s
t
a
r
t
/
s
t
o
p
s
w
i
t
c
h
t
o
open circuit between N and 47.
K2 Open Open
Deenergizes engine components;
generator set shuts down
Fault shutdowns: Low oil pressure (LOP),
high engine temperature (HET) after the
engine operating temperature reaches
103_C (218_F), and high exhaust
temperature (ETS) (wet exhaust only) after
the e
x
haust tem
p
erature reaches
K1 relay, LED1 lights, and fault
lamp
t
h
e
e
x
h
a
u
s
t
t
e
m
p
e
r
a
t
u
r
e
r
e
a
c
h
e
s
88--102_C (190--215_F). Contacts close
5--8 seconds after reaching shutdown
level.
Note: The fault shutdown latches to keep
the fault lamp lit. Move the generator set
master switch to OFF/RESET.
K1 Closed Open
Deenergizes engine components;
generator set shuts down
Fault shutdown: Overspeed (OS).
Contacts close when engine speed
reaches shutdown level. Factory set at
7
0
H
z
K1 relay, LED1 lights, and fault
lamp
70 Hz.
Note: The fault shutdown latches to keep
fault lamp lit. Move the generator set
master switch to OFF/RESET.
K1 Closed Open
Deenergizes engine components;
generator set shuts down
Fault shutdown: Overcrank (OC).
Contacts close on overcrank (locked rotor)
if the speed sensor signal is absent longer
t
h
a
n
3
0
s
e
c
o
n
d
s
K1 relay, LED1 lights, and fault
lamp
than 30 seconds.
Note: The fault shutdown latches to keep
the fault lamp lit. Move the generator set
master switch to OFF/RESET.
K1 Closed Open
Deenergizes engine components;
generator set shuts down
Figure 6 -3 Relay Controller Sequence of Operation