The Decision-Maker 550 is a generator-set controller. It is used on generator sets from Decision-Maker and Kohler, including the 1000 REOZM, 100ERESD, 100REOZJC and 100REOZJE.
Used across brands: Decision-Maker, Kohler
Also fitted to: Decision-Maker 550, Kohler Decision-Maker 550, Kohler G4-130 (150REZG), Kohler G4-131 (50REZG), Kohler G4-138 (100REZG), Kohler G4-140 (45REZG), Kohler G4-200 (80ERESD).
| Code | Meaning | Remedy |
|---|---|---|
| 32 | High Coolant Temperature | |
| 32A | Emergency Stop | Reset the emergency stop switch. |
| 40 | Pre High Coolant Temp. | |
| 41 | Pre Low Oil Pressure | Check and adjust oil level or replace oil pump. |
| 48 | Emergency Stop | |
| 62 | Low Battery Volts | |
| 63 | Low Fuel | Refuel the generator set. |
| 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.) | |
| Canadian installations only | For standby service connect the output of the generator set to a suitably rated transfer switch in accordance with Canadian Electrical Code, Part 1. | |
| 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). | |
| Hot coolant and steam | Before removing the pressure cap, stop the generator set and allow it to cool. Then loosen the pressure cap to relieve pressure. | |
| Hot engine and exhaust system | Do not work on the generator set until it cools. | |
| 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. | |
| Osed moving parts | Keep hands, feet, hair, clothing, and test leads away from the belts and pulleys when the generator set is running. Replace guards, screens, and covers before operating the generator set. | |
| Parallel Operation | This product includes features intended to support operation in parallel with the utility grid, but these features have not been evaluated for compliance with specific utility interconnection protection standards or requirements. | |
| Servicing the exhaust system. Hot parts | Do not touch hot engine parts. | |
| 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. | |
| Unbalanced weight | Do not use lifting eyes. Lift the generator set using lifting bars inserted through the lifting holes on the skid. | |
| Voltage reconnection | Affix a notice to the generator set after reconnecting the set to a voltage different from the voltage on the nameplate. Order voltage reconnection decal 246242 from an authorized service distributor/dealer. |
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.