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Kohler 26RCA Generator Set

The Kohler 26RCA is a 24 kW (24 kVA) LPG/Natural Gas standby generator set powered by a Kohler CH1006 engine. It is available at 120/240 V, 1-phase, 60 Hz and rated 100 A. It holds about 1.9 L (0.5 gal) of oil. Starting uses 1 group-51 battery rated 500 CCA at 12 V. The set measures 1193×660×820 mm (47.0×26.0×32.3 in), weighs about 283 kg (624 lb) and produces 56 dBA at 7 m.

24 kW
Standby
0.999 L
Displacement
1.9 L
Oil capacity
4
Document types

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Specifications

FuelLPG/Natural Gas
Frequency60.0 Hz
Standby power24 kW
Standby kVA24
ControllerRDC2
Oil capacity1.9 L
AlternatorKohler 2F8
Voltage options120/240 V
Phase1
Rated current100 A
Power factor1.0
Circuit breaker125 A
Battery group51
Battery cranking500 CCA
Battery voltage12 V
Battery quantity1
Dimensions (L×W×H)1193×660×820 mm
Dry weight283 kg
Sound level56.0 dBA @ 7 m

Engine

Kohler CH1006
Oil capacity1.9 L
Displacement0.999 L
Rated speed3600 rpm

Filters & service parts

model family
ItemSpecCapacityPart #Interval
Air filter500 hr find
Fuel filter1000 hr find
Oil filter500 hr find
Belt18000 hr find
Coolant1500 hr
Oil500 hr

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.

Common questions

What is the power rating of the Kohler 26RCA?

The Kohler 26RCA is rated 24 kW standby (24.0 kVA).

What engine does the Kohler 26RCA use?

The Kohler 26RCA is powered by the Kohler CH1006 engine.

What fuel does the Kohler 26RCA use?

The Kohler 26RCA runs on LPG/Natural Gas.

What is the oil capacity of the Kohler 26RCA?

The Kohler CH1006 engine in the Kohler 26RCA has an oil capacity of 1.9 liters.

What alternator does the Kohler 26RCA use?

The Kohler 26RCA uses a Kohler 2F8 alternator.

Troubleshooting

18

Fault codes

CodeMeaningCause
BusDeadLiveThe 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.
BusLiveDeadThe 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.
CfgModelNumThe 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).
CfgSysVoltThe 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.
ConCheckFailFailure to Auto-Discover APM connections.Wires 9A and 9B crossed between the generators. Wires 9A or 9B not connected.
ConNotDetermAPM 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.
ContactorOkSuccessful auto-discovery of APM connections.Auto-discovery was activated by placing other generator in OFF and this generator in RUN.
ErraticSigThe power metering on this controller gives a signal that is not consistent with the system configuration. Reversing the power direction does not resolve the problem.Bad wiring to the CT. Too much tension on wires from the CT to the controller.
LossOfComAPMThe Automatic Paralleling Module has stopped communicating on RBUS. (An APM was detected on the RBUS network but is no longer communicating).APM is unplugged. Primary controller is powered down. Check the battery connections. See previous page for more information. Intermittent connections on RBUS network wiring.
LossOfComm2The primary controller has lost communication with the secondary controller. (A secondary controller was detected, then communication was lost.)RBUS disconnected, secondary controller battery disconnected, updating firmware in secondary controller, or intermittent RBUS connections.
LossOfFieldThis generator has absorbed more than 25% reactive power (magnetic excitation current) for 20 seconds.Generator voltage on this generator is not calibrated correctly. Generator voltage on other generator is not calibrated correctly. Bus voltage on this generator is not calibrated correctly. Bus voltage on the other generator is not calibrated correctly.
MeteringOkThe generator has verified that the metering is connected correctly and that the direction is consistent with expected power direction.Status message indicates that the CT is connected to the generator correctly.
MeterUnknownThis generator does not know if the metering is connected or the orientation of the connection. This means that the generators can’t share load accurately until this information is known.System commissioning and startup not yet complete. See the APM instructions.
NoCurrentThe generator has applied load (using the other generator) and has observed no current on the power sensing inputs.The CT is not connected to the controller. The output leads from the generator do not go through the CT in the correct direction. See the APM instructions.
SyncFailureThe generator has been attempting to synchronize for over 2 minutes without success.Generator is hunting. Advanced speed control settings need adjustment. Load is changing frequently to disturb the online generator.

Symptoms & remedies

SymptomRemedy
Battery acid can cause blindness and burn skin.If battery acid splashes in the eyes or on the skin, immediately flush the affected area for 15 minutes with large quantities of clean water. Seek immediate medical aid in the case of eye contact.
Battery acid is electrically conductive and corrosive.Add 500 g (1 lb.) of bicarbonate of soda (baking soda) to a container with 4 L (1 gal.) of water and mix the neutralizing solution. Pour the neutralizing solution on the spilled battery acid and continue to add the neutralizing solution to the spilled battery acid until all evidence of a chemical reaction (foaming) has ceased. Flush the resulting liquid with water and dry the area.
Short circuits can cause bodily injury and/or equipment damage.Disconnect the battery before generator set installation or maintenance. Remove all jewelry before servicing the equipment. Use tools with insulated handles. Remove the negative (–) lead first when disconnecting the battery. Reconnect the negative (–) lead last when reconnecting the battery. Never connect the negative (–) battery cable to the positive (+) connection terminal of the starter solenoid. Do not test the battery condition by shorting the terminals together.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

13model family
Part #DescriptionQtySystem
EZ-273000-JBatteryBattery Amazon eBay PartsGeek
GM101483Breather tube heater wrap, 120 VAC1Breather tube heater PartsGeek
GM102176Thermostat, 14 kW Models1Thermostat PartsGeek
GM103743Emergency Stop Switch (optional)2Emergency stop switch PartsGeek
GM110893Breather tube heater, 120 VAC, ON at 4°C (40°F), OFF at 13°C (55°F)1Breather tube heater PartsGeek
GM110894Breather tube heater, 120 VAC, ON at 4°C (40°F), OFF at 13°C (55°F)1Breather tube heater PartsGeek
GM110895Oil heater, 120 VAC, ON at 4°C (40°F), OFF at 13°C (55°F)1Oil heater PartsGeek
GM118784Oil heater, 120 VAC, ON at 4°C (40°F), OFF at 13°C (55°F)1Oil heater PartsGeek
GM19463240 VAC 3-pin Mate-N-Lock connector, 20 and 26 kW Models1Thermostat PartsGeek
GM12070Generator Set Application, Service Duty, Voltage, Alt Model, Insulation, MFG Date, Amps, Phase, RPM, Battery, Fuel, kW, kVA, PF, Hz, Genset Model, Spec Number, Serial Number, Material Number1Service part / kit PartsGeek
GM79141HScrew, spacer, and existing nut, 20 and 26 kW Models1Service part / kit PartsGeek
GM79142Bushing, 20 and 26 kW Models1Service part / kit PartsGeek
GM88228Power cord disconnect plug, 1/8 NPT threaded fitting1Service part / kit PartsGeek

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
25%
50%
75%
100%
Prime
Standby
Standby25%
Standby50%
Standby75%
Standby100%

Available documents

Brochure — g6130 (Kohler)Spec sheet — g4315 (Kohler)Installation manual — adv9919 (Kohler)Installation manual — tp7091 (Kohler)Service manual — 14-20-26-rca-rcal-service-manual (Kohler)Service manual — PDF-tp7092 (Kohler)