The RDC2 is a generator-set controller. It is used on generator sets from Generac and Kohler, including the 10RESV, 12RESV, 8RESV and 10RESV.
Used across brands: Generac, Kohler
Also fitted to: Kohler 10RESV/10RESVL, Kohler 12RESV/12RESVL, Kohler 14/20RCA/RCAL, Kohler 14/20RES, Kohler 14/20RESA/RESAL, Kohler 14RCA/14RCAL, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA/20RCAL, Kohler 20RCA/L, Kohler 20RESA/20RESAL/20RESC/RESCL, Kohler 20RESC/RESCL, Kohler 26RCA/26RCAL, Kohler 26RCA/L, Kohler 26RCA/RCAL, Kohler 8RESV/8RESVL, Kohler Model RESA/L or RESC/L, Kohler RESA/RESAL, Kohler TP-6984 4/26f.
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| AC Sens Loss Shutdwn | Loss of AC sensing shutdown — Shutdown: The controller shut down the generator because there was less than 5% of rated voltage measured on Phase A for 3 seconds, only in AUTO, only after acceptable voltage (> 5% of UV setting) has been detected. | Check for loose wiring and connections; Check all AC leads; Troubleshoot alternator. | |
| AC Sens Loss Warning | Loss of AC sensing warning — Warning: The controller has measured less than 5% of rated voltage on Phase A for 1 second, 10 seconds after crank disconnect. | Check for loose wiring and connections; Check all AC leads; Troubleshoot alternator. | |
| ATS ComError Warning | ATS communication error — Warning: The controller has lost communication with the RXT ATS that had previously been communicating properly. | Check connection to ATS module. | |
| ATS ComError Warning | ATS communication error — Warning: The controller has lost communications with the RXT ATS that had previously been communicating properly | Check connections from ATS interface module to generator set; check the power LED on the interface board; see Section 5.1 | |
| ATS Fail Xfr Warning | ATS fail to transfer — Warning: The RXT ATS has reported a fail to transfer, the digital output for ATS Fail To Transfer (PIM) is active (contacts closed) | See the troubleshooting charts in Section 4.6; also see Section 4.7 | |
| ATS Fail Xfr Warning | ATS fail to transfer — Warning: The RXT ATS has reported a fail to transfer, the digital output for ATS Fail To Transfer (PIM) is active (contacts closed). | Consult ATS manual for troubleshooting. | |
| ATS PhaseRot Warning | Warning: The RXT ATS has reported a phase rotation mismatch (3-phase only) and the ATS will not transfer. | Check wiring to the ATS; Consult ATS manual for troubleshooting. | |
| Accy PwrOver Warning | Accy PwrOver Warning | Controller internal circuit protection activated | Press OFF to reset. Contact an authorized Kohler dealer for service |
| Accy PwrOver Warning | Accy PwrOver Warning — controller internal circuit protection activated | Press OFF to reset. Contact an authorized Kohler distributor/dealer for service | |
| Accy PwrOver Warning | Controller internal circuit protection activated | Press OFF to reset; Contact an authorized Kohler distributor/dealer for service | |
| AccyPwrOver Warning | Accessory Power Overload — Warning: An overcurrent fault (short circuit) on the accessory controller power output. | Check wiring to RBUS accessories; Troubleshoot the RBUS accessories; refer to the documentation provided with the accessories. | |
| Always Off | OnCue Plus has been used to control this PIM digital output. The digital output is no longer controlled by the generator set. Applies to digital outputs B3 through B6 on the PIM only | Click on the PIM output in OnCue Plus to turn the output on or off. See the OnCue Plus Operation Manual; To reset the PIM digital output to a function controlled by the generator set, use SiteTech software to re-assign the output event | |
| Always On | Always On | ||
| Auto Locked | Chicago Code Active — The digital output for Chicago Code Active (PIM) is active (contacts closed), indicating the digital input for Chicago Code Active (PIM) is active (low) and thus master switch is locked in the AUTO position | Check customer equipment connected to the PIM module | |
| Aux Input Shutdwn | Auxiliary input shutdown — Shutdown: The controller shut down the generator because the digital input for a custom shutdown (AuxiliaryInputShutdown - PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Aux Input Warning | Auxiliary input warning — Warning: The digital input for a custom warning (AuxiliaryInputWarning - PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Auxiliary Input | Auxiliary Input — An optional customer-connected input is closed. (Digital input from optional PIM.) | Check customer-supplied equipment. | |
| Batt Chg Flt Warning | Battery charger fault warning — Warning: The digital input for Battery Charger Fault Warning (PIM) is active (low). For an external battery charger only, not applicable to the RDC2 built-in battery charging. | Check customer equipment connected to the PIM module. | |
| Battery CRLow Warning | Warning: Battery voltage dropped to 11 VDC or less for 30 seconds or more. | Check engine starting battery; Check battery charger DC output voltage from RDC2. See Section 5.12.2. | |
| Battery CrLo | Critically Low Battery Voltage — Engine starting battery voltage falls below 11 V for more than 10 seconds. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable level. | Check the battery rating and condition.; Check the battery charger operation.; Charge or replace the battery. | |
| Battery High | High Battery Voltage — Engine starting battery voltage rises above 133% (16 V) of the battery voltage setting for more than 10 seconds. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable level. | Check the battery rating and condition.; Check the battery charger operation. | |
| Battery High Warning | Warning: The controller has measured battery voltage that is above the high warning setting for 10 seconds or more. Operates during exercise and normal operation. | Check engine starting battery. | |
| Battery Low | Low Battery Voltage — Engine starting battery voltage falls below the battery voltage setting (typically 12.5 volts) for more than 90 seconds when the engine is not running. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable level. | Check the battery rating and condition.; Check the battery charger operation.; Charge or replace the battery. | |
| Battery Low Warning | Warning: The controller has measured battery voltage that is below the low warning setting for 90 seconds or more. | Check engine starting battery; Check battery charger DC output voltage from RDC2. See Section 5.12.2. | |
| Battery Low Warnings | Low battery voltage warnings are displayed on the controller display. | Check the battery connections and ensure they are secure. Replace the battery if it is low on charge. | |
| BusDeadLive | The bus is measured to be dead when one of the generators is supposed to be supplying voltage to the bus (closed contactor) | Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly | |
| BusDeadLive | The bus is measured to be dead when one of the generators is supposed to be supplying voltage to the bus (closed contactor). | Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly. | |
| BusLiveDead | The bus is measured to be live when no generators are connected to it (both contactors open) | Bus metering V9A and V9B connections to V9 of paralleling protection harness connected incorrectly | |
| BusLiveDead | The bus is measured to be live when no generators are connected to it (both contactors open). | Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly. | |
| CfgModelNum | The two generators that are intended to be paralleled have incompatible model numbers | Incorrect configuration of one of the generators. Different generator types | The paralleled generator sets must be the same kW model. (i.e. two 14 kW or two 20 kW models.) |
| CfgModelNum | The two generators that are intended to be paralleled have incompatible model numbers. | Incorrect configuration of one of the generators. Different generator types. The paralleled generator sets must be the same kW model. (i.e. two 14 kW or two 20 kWor 26 kW models). | |
| CfgSysVolt | The system voltage of the two generators intended to be paralleled is not the same. | One of the two generators is incorrectly configured. Intermittent connections on RBUS network wiring. | |
| CfgSysVolt | The system voltage of the two generators intended to be paralleled is not the same. Because the system does not know which voltage is correct, the generators will not be allowed to start | One of the two generators is incorrectly configured; Intermittent connections on RBUS network wiring | |
| CfgSysVolt | The system voltage of the two generators intended to be paralleled is not the same; Because the system does not know which voltage is correct, the generators will not be allowed to start | One of the two generators is incorrectly configured; Intermittent connections on RBUS network wiring | |
| Chk DateTime | Verify Date Time Setting — The time and date have not been set on the generator controller. | Enter the date and time using the RDC2 controller. See Figure 3-8 and Figure 3-16. | |
| Chk DateTime Warning | Check date and time warning — Warning: DC power to the controller has been interrupted and the date and time may not be correct. Event history may not have accurate time/date stamps. | Verify the time and date settings to ensure proper operation of scheduled operations and for event history logging. | |
| ChkngMeter | This generator has paralleled to the other generator and is verifying that the metering is connected and establishing the connection direction | Status message appears the first time the two generators are paralleled | |
| Common Fault | The digital output for Common Fault (PIM) is active (contacts closed), indicating the generator is shutdown for any (all) fault | Check for faults and troubleshoot any/all fault conditions individually | |
| Common Warng | The digital output for Common Warning (PIM) is active (contacts closed), indicating that any (all) warning is active | Check for warnings and troubleshoot any/all warning conditions individually | |
| ConCheckFail | Failure to Auto-Discover APM connections | Wires 9A and 9B crossed between the generators; Wires 9A or 9B not connected | |
| ConCheckFail | Failure to Auto-Discover APM connections. | Wires 9A and 9B crossed between the generators. Wires 9A or 9B not connected. | |
| ConChecking | Performing APM connection auto-discovery | This generator has started in RUN, the other generator is in OFF | |
| ConNotDeterm | APM connection auto-discovery is not complete. This means that the generator does not know which contactor is connected to it | Generators not yet started in RUN with other generator in OFF | See the APM instruction sheet for instructions to perform the auto-discovery procedure |
| ConNotDeterm | APM connection auto-discovery is not complete. This means that the generator does not know which contactor is connected to it. | Generators not yet started in RUN with other generator in OFF. See the APM instruction sheet for instructions to perform the auto-discovery procedure. | |
| ConNotDeterm | APM connection auto-discovery is not complete; This means that the generator does not know which contactor is connected to it | Generators not yet started in RUN with other generator in OFF; See the APM instruction sheet for instructions to perform the auto-discovery procedure | |
| ContactorOk | Successful auto-discovery of APM connections | Auto-discovery was activated by placing other generator in OFF and this generator in RUN | |
| ContactorOk | Successful auto-discovery of APM connections. | Auto-discovery was activated by placing other generator in OFF and this generator in RUN. | |
| CoolTemp Vhi | Ect Higher Than Expected 2 — Coolant temperature is extremely high. | Check coolant level.; Check radiator and fans for obstruction.; Contact an authorized distributor/dealer for service and provide the fault code. | |
| CoolTempHigh | Ect Higher Than Expected 1 — Coolant temperature is too high. | Check coolant level.; Check radiator and fans for obstruction.; Contact an authorized distributor/dealer for service and provide the fault code. | |
| Coolant Lvl Low | Low Coolant Level Shutdown — The coolant level switch input has been activated. | Check coolant level.; Check radiator hoses for leaks.; Contact an authorized distributor/dealer for service. | |
| CoolntTemp 0 | Coolant Temp 0 Shutdown — The ECM reported a problem with the coolant temperature sensor reading: 0 = high temperature. | Check coolant level.; Check radiator and fans for obstruction.; Contact an authorized distributor/dealer for service and provide the fault code. | |
| CoolntTemp 3 | Coolant Temp 3 Shutdown — The ECM reported a problem with the coolant temperature sensor reading: 3 = high voltage. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| CoolntTemp 4 | Coolant Temp 4 Shutdown — The ECM reported a problem with the coolant temperature sensor reading: 4 = low voltage. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| CoolntTemp 5 | Coolant Temp 5 Shutdown — The ECM reported a problem with the coolant temperature sensor reading: 5 = open circuit. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| Crank Lost | Crank Signal Lost — Crankshaft Position Sensor (CPS) timeout error occurred. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| Current A High Warning | Over Current | ||
| Current A High Warning | Over Current — Paralleled | ||
| Current A High Warning | Over Current — Paralleled; 10 sec. delay; display cleared on Press AUTO or OFF | ||
| Current A High Warning | Over Current — Paralleled; delay 10 sec.; display cleared on Press AUTO or OFF | ||
| Default Pars Warning | Default Parameters — Warning: The controller has been loaded with default parameters. | Configure settings as required for desired operation. |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.