Kohler 20RESD User Manual

TP-6805 8/1574 Section 5 Troubleshooting
Fault Message CheckDescription/ CommentsAction
OB2 CommLoss
(RBUS device
])
Warning Communication with option board #2
has been lost.
Check RBUS wiring to
inoperative option board.
OB3 CommLoss
(RBUS device
])
Warning Communication with option board #3
has been lost.
Check RBUS wiring to
inoperative option board.
OB4 CommLoss
(RBUS device
])
Warning Communication with option board #4
has been lost.
Check RBUS wiring to
inoperative option board.
Oil Level Low Shutdwn * Shutdown The controller shut down the generator
because the digital input for Low Oil
Level Shutdown (PIM) was activated
(low).
Check customer equipment
connected to the PIM module.
Oil Level Low Warning * Warning The digital input for Low Oil Level
Warning (PIM) is active (low).
Check customer equipment
connected to the PIM module.
Oil Pressure Low Shutdwn Shutdown The low oil pressure switch was closed
for 5 seconds or more, indicating low oil
pressure. Function is inhibited until 30
seconds after crank disconnect.
Check for oil leaks.
Check the oil level and add oil
if low.
Check the oil pressure
sensor; see Engine Service
Manuals.
Oil Pressure OpenCR Warning Warning When the generator set is not running
and controller is in OFF or AUTO, the
low oil pressure switch is not working
properly.
Check the oil pressure switch
connection. Replace the LOP
switch if necessary.
See Section 6.10.2.
Over Crank Shutdwn Shutdown The controller shut down the generator,
and ceased cranking, because the
engine was not successfully started
after the completion of the last of the
crank cycles setting delay 15 seconds.
Check fuel supply. Check
cranking circuit. Check
cranking battery.
Troubleshoot engine; see
Engine Service Manuals.
RBUS ComError Warning Warning The controller has lost communication
with an RBUS device that had
previously been communicating
properly.
]
Check connection to the
RBUS device
]
Spd Sens Flt Shutdwn
(Speed sensor fault)
Shutdown The controller shut down the generator
because the speed signal was lost.
Check leads 55, 66, F+, and
F-- between the alternator and
the controller. This fault also
occurs if the engine stalls;
check the engine and see the
troubleshooting chart in
Section 5.13.
Volts L1-L2 (AB) High Shutdwn [ Shutdown The controller shut down the generator
because the voltage measured from
Phase A to Phase B exceeded the high
limit for a time greater than the delay
setting 2 seconds.
Troubleshoot alternator. See
Section 5.13, Troubleshooting
Charts, and Section 6,
Component Testing and
Adjustment.
Volts L1-L2 (AB) Low Shutdwn [ Shutdown The controller shut down the generator
because the voltage measured from
Phase A to Phase B was greater 5% of
rated, but less than the low voltage
setting for a time greater than the delay
setting 10 seconds.
On 20RESB/C/CL/D, cause may be a
tripped thermostat.
Troubleshoot alternator. See
Section 5.13, Troubleshooting
Charts, and Section 6,
Component Testing and
Adjustment.
Check for evidence of high
temperatures inside the
enclosure. Reset the
thermostat.
* Programmable Interface Module (PIM) required.
[ Applies during exercise runs and normal operation.
] RBUS devices include the APM, PIM, LCM, load shed kit, RXT transfer switch, and the RXT combined interface board.
Figure 5-12 Fault Messages Displayed on the RDC2 Controller

Kohler 20RESD Specifications

General

Brand	Kohler
Model	20RESD
Category	Portable Generator
Language	English