- Engine:
- 3306B (S/N: 8NS1-UP; LRW1-UP)
- 3412 (S/N: 2WJ1-UP; 4BZ1-UP)
- 3412C (S/N: DJN1-UP; 9EP1-UP; TFT1-UP; BCW1-UP; LRY1-UP)
- 3412E (S/N: TGC1-UP)
- 3508 (S/N: 5PW1-UP)
- 3508B (S/N: 5KW1-UP)
- 3512 (S/N: 6WW1-UP)
- 3512B (S/N: FDE1-UP; 6GW1-UP)
- 3516 (S/N: 8TW1-UP)
- 3516B (S/N: 8NW1-UP; FDX1-UP)
- C2.2 (S/N: NCB1-UP)
- C3.3 (S/N: NCC1-UP)
- C4.4 (S/N: NCD1-UP; NCE1-UP)
- C6.6 (S/N: SDA1-UP)
- G3406 (S/N: R7E1-UP; KAR1-UP)
- G3412 (S/N: R7A1-UP; KAP1-UP)
- 3412 (S/N: 2WJ1-UP; 4BZ1-UP)
- Generator Set:
- 3406C GEN SET (S/N: C2G1-UP; C5G1-UP; C8G1-UP; 9ES1-UP; LRX1-UP)
- 3406E GEN SET (S/N: 8AZ1-UP)
- 3456 GEN SET (S/N: CCB1-UP; C1G1-UP; C3G1-UP; C4G1-UP; CAH1-UP; C2T1-UP; CBX1-UP)
- 3516 LGP HD (S/N: 25Z1-UP)
- C1.5 (S/N: NCA1-UP)
- C18 GEN SET (S/N: C6C1-UP; G4C1-UP)
- 3406E GEN SET (S/N: 8AZ1-UP)
- Power Module:
- PM3516 (S/N: BPD1-UP)
Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.
The ""Procedure" " in this Technical Information Bulletin should be followed if the output of the battery charger is not at the nominal voltage value. The battery charger is not necessarily faulty. The battery charger may be responding properly to the ambient temperature.
Problem
The open-frame battery chargers that are utilized with the EMCP3 control panels are equipped with temperature compensation circuitry. Occasionally, the battery chargers will intermittently initiate an erroneous alarm for either a Low Battery Voltage or a High Battery Voltage. These erroneous alarms are attributed to the thresholds that are set for the alarms. The thresholds that are set are improper for the battery chargers with compensation for temperature.
At high temperatures, the battery charger could produce an output voltage that is below the "LOW BATTERY CHARGER SYS VOLT" warning setpoint of the EMCP3 control panel. Thus, the alarm condition is activated.
At low temperatures, battery chargers that are equipped with the boost feature could produce an output voltage that is greater than the "HIGH BATTERY VOLTAGE" warning setpoint of the EMCP3 control panel. Thus, the alarm condition is activated.
The following items can have an influence on the circuitry for the temperature compensation:
- The EMCP3 control panel is exposed to radiant heat.
- The air flow in the Generator Set and/or around the Generator Set package is restricted.
Refer to the following list for some sources of radiant heat:
- Sunlight
- Close machines that generate heat
- Operation of a Jacket Water Heater within a canopy
- The Generator Set has just finished running and the forced air that is cooling the generator set has ceased.
- Insufficient air flow within the control panel can cause heat buildup within the enclosure.
Solution
The following setpoints have been updated as a improvement on new orders for the Generator Sets:
- EMCP3 "LOW BATTERY CHARGER SYS VOLT"
- EMCP3 "HIGH BATTERY VOLTAGE"
Refer to Table 2.
Affected Parts
Refer to Table 1 for the list of parts that are affected:
| Affected Parts | |
|---|---|
| Part Number | Description |
| 227-5800 | Generator Set Control Group (EMCP 3.1) |
| 227-5801 | Generator Set Control Group (EMCP 3.2) |
| 227-5802 | Generator Set Control Group (EMCP 3.3) |
| 261-7818 | Battery Charger |
| 266-9668 | Battery Charger |
| 266-9669 | Battery Charger |
| 266-9670 | Battery Charger |
| 266-9671 | Battery Charger |
| 290-4433 | Battery Charger |
| 292-8000 | Battery Charger |
| 292-8002 | Battery Charger |
| 292-8003 | Battery Charger |
| 292-8005 | Battery Charger |
| 292-8006 | Battery Charger |
Procedure
Before replacing the battery charger for these false alarms, the service technician should confirm the following EMCP3 setpoints. Also, the service technician should confirm that there is adequate ventilation.
Note: Some battery chargers do not produce the rated output when a battery is not connected. Refer to Engine News, SEBD9440, "Improved Battery Chargers For Gensets are Available" for troubleshooting steps.
To avoid false alarms, adjust the warning setpoints according to Table 2.
| Warning Setpoints | ||
|---|---|---|
| System | Setpoint | |
| "LOW BATTERY CHARGER SYS VOLT" Warning | Generator Set (12 VDC) | 12.5 VDC |
| Generator Set (24 VDC) | 25 VDC | |
| "HIGH BATTERY VOLTAGE" Warning | Generator Set (24 VDC) | 15 VDC |
| Generator Set (24 VDC) | 30 VDC | |
Adjusting the "LOW BATTERY CHARGER SYS VOLT"
Refer to the following steps in order to adjust the "LOW BATTERY CHARGER SYS VOLT" warning setpoint:
- Press the red "STOP" key.
- From the "MAIN MENU", select "CONFIGURATION".
- From the "CONFIGURATION" menu, select "SETPOINTS".
- From the "SETPOINTS" menu, select "ENG MON/PROTECT".
- From the "ENG MON/PROTECT" menu, select "BATT VOLTS MONITOR".
- From the "BATT VOLTS MONITOR" menu, select "LOW BATT CHARGER SYS VOLT WARN THRESHOLD".
- Press the left cursor and the right cursor in order to select the digits that need to be changed.
- Press the up cursor and the down cursor in order to increase the setpoint value or decrease the setpoint value.
- Press the "RETURN" key in order to save the new value.
Adjusting the "HIGH BATT WARNING THRESHOLD"
Refer to the following steps in order to adjust the "HIGH BATT WARNING THRESHOLD" warning setpoint:
- Press the red "STOP" key.
- From the "MAIN MENU", select "CONFIGURATION".
- From the "CONFIGURATION" menu, select "SETPOINTS".
- From the "SETPOINTS" menu, select "ENG MON/PROTECT".
- From the "ENG MON/PROTECT" menu, select "BATT VOLTS MONITOR".
- From the "BATT VOLTS MONITOR" menu, select "HIGH BATT WARNING THRESHOLD".
- Press the left cursor and the right cursor in order to select the digits that need to be changed.
- Press the up cursor and the down cursor in order to increase the setpoint value or decrease the setpoint value.
- Press the "RETURN" key in order to save the new value.