Troubleshooting
30| Symptom | Cause | Remedy |
|---|---|---|
| Normal source circuit breaker is open. | Close circuit breakers leading from the normal source to the transfer switch. | |
| Emergency-to-normal retransfer time delay has not timed out. | Check time delay settings. See Figure 2-2. Enough time must elapse for the time delay emergency-to-normal timer to time out. | |
| Normal source voltage levels are out of range. | Check the normal source voltage. See Section 5.1. | |
| Normal source sensing circuits are malfunctioning. | See Section 5.3, Normal Source Sensing. | |
| Transfer switch mechanism is binding. | Debris is in the transfer switch mechanism. | |
| Transfer switch mechanism is damaged. | Replace the transfer switch assembly. See Section 7.5. | |
| ATS operates erratically or operates out of specifications. | Power supply problems/loose connections, incorrect transfer switch controller operation/calibration. Clean the transfer switch assembly. See Section 3.2.2. | |
| Source available LED off when Source is available. | Controller does not recognize an available source. Check switches, circuit breakers for open circuit. Check source connections to the ATS. | |
| Malfunctioning LED. | Controller does not recognize an available source. Check source voltage and compare to source pickup and dropout levels. See Sections 2.5.1 and 5.1. Replace the controller’s switch/LED membrane if one or more LEDs do not light. If no LEDs light, troubleshoot power and connections to the controller. Check source sensing. See Sections 5.3 and 5.4. | |
| Position LED not lit. | Position microswitch malfunction. | Check the operation of the position microswitches. See Section 5.10. |
| Transfer switch in intermediate position. | LEDs not functioning. Controller reset has cleared the exercise timer. Manually operate the transfer switch and check the position LED operation. See Section 2.6. Check for evidence of solenoid coil damage. Replace the solenoid assembly if necessary. See the Table of Contents to locate solenoid assembly replacement procedures for your model transfer switch. | |
| Exerciser does not operate when expected. | Check accessory board time delay settings, if equipped. Figure 4-1 Troubleshooting Chart | |
| Engine does not start. | Is the generator set controller in AUTO? YES: Perform the engine start test procedure in Section 5.9. Do the controller’s engine start contacts operate correctly? NO: Disconnect connector P2 from the ATS controller and jumper across the generator set engine start leads. Does the engine start? YES: Accessory board installed? NO: Replace the control board. See Section 7.4. NO: YES NO: NO NO: YES * Check accessory board time delay settings, if equipped. | |
| Test does not operate if Normal source is not available. | Check that the TEST switch opens and closes. See Section 5.8, Switch/LED Membrane. Check the engine start circuit. See Section 5.9. Engine start circuit OK? | |
| Exerciser does not start or stop the generator set engine. | Note: Pressing the Exercise button sets the exerciser to the current time and day. Reset the exerciser at the desired time and day after completing these tests. Is an optional accessory board installed? YES: NO Programmable Exerciser Installed? NO: YES Check settings. See TT-1403. Disconnect the programmable exerciser and check ATS operation without it. D Check DIP switch 1, 1 week/2 week exercise. D Remove the accessory board and check ATS operation. | |
| ATS fails to operate and no LEDs are lit | No power to the transfer switch/controller. Generator set controller is in OFF mode or the batteries are not charged or connected. | Close circuit breakers leading from power sources to the transfer switch. Troubleshoot power to the system. See Section 5.1. Press AUTO on the generator set controller. Check that the generator set batteries are charged and connected. |
| Generator set does not start when the normal source fails | Generator set controller is in OFF mode or the batteries are not charged or connected. | Press AUTO on the generator set controller. Check that the generator set batteries are charged and connected. |
| Generator set does not start with the exerciser | Generator set is malfunctioning. | See the generator set operation or service manual. |
| Generator set does not shut down | Generator set controller is in RUN mode. The engine start circuit is malfunctioning, or the exerciser is operating. Time delay engine cooldown (TDEC) has not timed out. | Press AUTO or OFF on the generator set controller. If the exerciser has recently been in the Set position or is in the Enable position, wait for the exerciser period of 20 minutes to end. If the generator set continues to run, see Section 5.9 to troubleshoot the engine start circuit. Check operation. Enough time must pass for the engine cooldown time delay to expire. |
| ATS fails to transfer the load to the emergency source after the generator set starts | Generator set is malfunctioning. | See the generator set operation or service manual. |
| ATS fails to retransfer the load to the normal source after the normal source returns | Generator set circuit breaker is open. Time delay normal-to-emergency (TDNE) has not timed out. Generator voltage is out of range or emergency source sensing circuits are malfunctioning. | Close circuit breakers leading from the generator set to the ATS. Check operation. Enough time must pass for the time delay normal-to-emergency to time out. Check the emergency source voltage. Repair or adjust generator set if the output voltage is it is out of range. |
| Does the GEN source LED flash? | NO | Check the Exercise switch operation. See Section 5.8, Switch/LED Membrane. Does the Exercise switch open and close correctly? |
| Does the generator set start and run? | NO | See Figure 4-2, Troubleshooting Engine Start. |
| Does the generator set controller have an additional engine cooldown time delay? | NO | Check whether the generator set controller has an additional engine cooldown time delay. Does generator shut down after the engine cooldown time delays? |
| Is the utility source available LED illuminated? | NO | Exerciser will not transfer the load or stop the engine if the utility source is not available. Check source circuit breakers and see Sections 5.1 and 5.3. |
| Are the engine start contacts open? | NO | Replace the controller circuit board. |
| Is an optional Accessory Board installed? | YES | D Check engine cooldown time delay setting, Accessory Board time delay switch 1. See the ATS operation/installation manual. Verify that switch is not in between settings. |
| Is the problem occurring after TEST button is pressed and held for 2 seconds to end a Test? | NO | Check Test button operation. See Switch/LED membrane, Section 5.8. Test button operation OK? |
| Test engine start contacts. | NO | See Section 5.9. Are the engine start contacts open? |
| Check Test button operation. | NO | See Switch/LED membrane, Section 5.8. Test button operation OK? |
Symptom → cause → remedy extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
About
Kohler SE-ILC — transfer switch. Specifications and parts compiled from manufacturer documents.