Kohler CH740/CH1000 Engine Engine

• Under Voltage Paralleled Voltage L1-L2 Low Warning
  Fix: Press AUTO or OFF *
• Under Frequency Paralleled Frequency Low Warning
  Fix: Press AUTO or OFF *
• This 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. LossOfField
• This 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. MeterUnknown
  Cause: System commissioning and startup not yet complete. See the APM instructions.
• The two generators that are intended to be paralleled have incompatible model numbers. CfgModelNum
  Cause: 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.)
• The system voltage of the two generators intended to be paralleled is not the same. CfgSysVolt
  Cause: One of the two generators is incorrectly configured. Intermittent connections on RBUS network wiring.
• The primary controller has lost communication with the secondary controller. (A secondary controller was detected, then communication was lost.) LossOfComm2
  Cause: RBUS disconnected, secondary controller battery disconnected, updating firmware in secondary controller, or intermittent RBUS connections.
• The 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. ErraticSig
  Cause: Bad wiring to the CT. Too much tension on wires from the CT to the controller.
• The 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. MeteringOk
• The generator has been attempting to synchronize for over 2 minutes without success. SyncFailure
  Cause: Generator is hunting. Advanced speed control settings need adjustment. Load is changing frequently to disturb the online generator.
• The generator has applied load (using the other generator) and has observed no current on the power sensing inputs. NoCurrent
  Cause: 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.
• The bus is measured to be live when no generators are connected to it (both contactors open). BusLiveDead
  Cause: Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly.
• The bus is measured to be dead when one of the generators is supposed to be supplying voltage to the bus (closed contactor) BusDeadLive
  Cause: Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly.
• The Automatic Paralleling Module has stopped communicating on RBUS. (An APM was detected on the RBUS network but is no longer communicating.) LossOfComAPM
  Cause: APM is unplugged. Primary controller is powered down. Check the battery connections. See previous page for more information. Intermittent connections on RBUS network wiring. Check RBUS communication connections.
• Reverse Power Paralleled Real Power Low Warning
  Fix: Press AUTO or OFF *

Compiled from service & troubleshooting documentation across every generator set that uses the Kohler CH740/CH1000.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.