TP-6734 5/1014 Section 1 Descriptions and Service Views
1.5 Controllers
RDC (RES) DC (RESL)
Figure 1-1 Controllers
RES models are equipped with the Residential Digital
Control (RDC). RESL models use the Digital Control
(DC). See Figure 1-1. Controller features include:
D Integrated control for the generator set and Kohlerr
Model RRT transfer switch
D Membrane keypad for configuration and adjustment
(RDC only)
d Password-protected access to system
configuration and adjustment menus
d System voltage/frequency selection and engine
configuration
d Voltage, gain, and engine speed adjustment
D Master switch pushbuttons (Off, Auto, Run)
D Off, Auto, and Run LED indicators
D LED display:
d Crank cycle status
d Setup information (RDC only)
d Software version
d Faults
d Event history
D Scrolling system status display when generator set is
running includes:
d Engine runtime hours
d Battery voltage
d Generator voltage
d Engine temperature
d Utility voltage*
D Faults displayed:
d ATS communication error
d Auxiliary fault
d High battery voltage
d High engine temperature
d Locked rotor
d Low battery voltage
d Low oil pressure
d Overcrank
d Overfrequency
d Overspeed
d Overvoltage
d Underfrequency
d Underspeed
d Undervoltage
D Selectable exercise and test modes:
d Weekly unloaded quiet diagnostic test *
d Weekly loaded exercise
d Loaded test
d Unloaded test
D Smart engine cooldown senses engine temperature *
D Remote two-wire start/stop capability for optional
connection of Model RDT or RSB transfer switches
D Digital isochronous governor to maintain
steady-state speed at all loads
D Digital voltage regulation: ±1.5% RMS no-load to
full-load
D Automatic start with programmed cranking cycle
D Load control output allows delayed start of large
motor loads *
D Field-upgradeable controller firmware (requires
Kohlerr SiteTecht software, available only to Kohler
authorized distributors and dealers)
D Front-access mini USB connector for software
upgrade
D Generator output voltage and frequency sensing with
adjustable voltage pickup and dropout settings
(requires Kohlerr SiteTecht software for
adjustment)
D Engine start and transfer time delays, adjustable
using optional Kohlerr SiteTecht software
(available only to Kohler authorized distributors and
dealers) *
D Communicates utility voltage sensing data and
transfer signals with the Model RRT transfer switch *
D Front access fuses and mini-breaker
* Model RRT transfer switch required
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