The 550 is a generator-set controller. It is used on generator sets from Kohler, including the 550 controller.
| Symptom | Cause | Remedy |
|---|---|---|
| AC Sensing Loss. | The local display shows AC sensing loss. | |
| Battery Charger Fault. | This fault feature requires an optional battery charger with a malfunction output for the lamp to function. Local display shows bat chgr fault. | |
| Battery acid cleanup | 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. |
| Battle Switch. | The local display shows battle switch. | |
| Breaker Closed. | The local display shows breaker closed. (Paralleling applications only.) | |
| Breaker Trip. | The local display shows breaker trip. (Paralleling applications only.) | |
| Common Protective Relay Output. | The local display shows common pr output. (Paralleling applications only.) | |
| Customer Auxiliary (Warning). | The local display shows digital input D01-D21 or analog input A01-A07. Using the remote communications package, the user can label the auxiliary functions. The controller displays the selected name instead of digital input D01-D21 or analog input A01-A07. | |
| Defined Common Faults. | The local display shows defined common fault. | |
| Detonation Warning. | The local display shows deton warning. (Waukesha-powered models only.) | |
| ECM Yellow Alarm. | This fault only relates to the DDC/MTU engine with MDEC/ADEC. The user can navigate the menus to access the fault code. The engine operation manual provides the fault code descriptions. | |
| Emergency Power System (EPS) Supplying Load. | The local display shows EPS supplying load. | |
| Ground Fault Detected. | The local display shows ground fault. | |
| High Battery Voltage. | The local display shows high battery voltage. See Figure 2-1 for high battery voltage specifications. The high battery voltage feature monitors the battery and battery charging system in the generator set operating and off modes. | |
| High Coolant Temperature Warning. | The local display shows hi cool temp warning. | |
| High Oil Temperature Warning. | The local display shows hi oil temp warning (DDC/MTU models with MDEC/ADEC and Waukesha-powered models only). | |
| Idle (Speed) Mode. | The local display shows idle mode active. | |
| Intake Air Temperature Warning. | The local display shows intake air temp warn (DDC/MTU models with MDEC/ADEC) and 03 intake air temp warn (Waukesha-powered models). | |
| Load Shed. | The local display shows load shed kW over. When the generator set frequency drops to less than 59 Hz on a 60 Hz system or 49 Hz on a 50 Hz system for more than 5 seconds, the local display shows load shed under freq. | |
| Low Battery Voltage. | The local display shows low battery voltage. See Figure 2-2 for low battery voltage specifications. | |
| The yellow lamp illuminates when the generator set master switch is not in the AUTO position. | Place the generator set master switch in the AUTO position before silencing the alarm horn. The alarm horn cannot be silenced unless the master switch is in the AUTO position. | |
| The yellow warning lamp illuminates indicating a fault or status event but does not shut down the generator set. | See Section 2.3.7, Controller Reset Procedure, for instructions on resetting a system warning. |
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.