What to do if S1 or S2 Available LED is not lit on my GE Zenith Controls Switch?
If the S1 or S2 Available LED is not lit on your GE Zenith Controls Switch, it could be due to several reasons. The sources might be either fully or partially unacceptable, so check for under voltage. It could also be that the S1 or S2 breakers are open, in which case you should check for missing phase(s). Also, check for under frequency.
What to do if my GE Zenith Controls ZTX Switch ATS will not retransfer Load?
If the ATS (Automatic Transfer Switch) will not retransfer the load, it might be because the timer has not expired yet, so wait for the timer to expire. Another reason could be that the Automatic Exerciser is in process. Also, the S1 Utility might be fully or partially unacceptable.
Why does my GE Zenith Controls ZTX ATS not transfer Load to S2?
If your GE Zenith Controls Switch ATS does not transfer the load to S2, it could be because the S2 Generator is fully or partially unacceptable. In this case, set the motor-saver to dropout below (generator). It's also possible that motor loads on the system are creating enough back-EMF to keep the missing phase from falling below the ATS Fail setpoint, so check EMF.
What to do if both S1 and S2 Position LEDs are Blinking on my GE Zenith Controls ZTX Switch?
If both S1 and S2 Position LEDs are blinking on your GE Zenith Controls Switch, it could indicate a few issues. First, the solenoid might be bad or disconnected, requiring the CANCEL key to clear the error. Second, the ATS contactor could be in a mid-position, so check the solenoid. Finally, check both limit switches and use the CANCEL key to clear.
What to do if S1 and S2 LEDs are Blinking on my GE Zenith Controls ZTX Switch?
If the S1 and S2 LEDs are blinking on your GE Zenith Controls Switch, it indicates a phase rotation mismatch between the sources. Rewire the sources to ensure they have the same rotation.
How to fix a GE Zenith Controls Switch that will not transfer in-phase?
If your GE Zenith Controls Switch will not transfer in-phase, first check if the In-Phase monitor is turned on and turn it on if it is not. Also, if the frequency difference between S1 and S2 is greater than 2Hz, adjust the generator governor to hold the frequency closer to the utility frequency.
Why S2 Generator will not start on my GE Zenith Controls ZTX?
If the S2 Generator will not start, check the generator start wiring, specifically the X1 or X2 connections.
What to do if the Timer/In-Phase LED is constantly on in my GE Zenith Controls ZTX?
If the Timer/In-Phase LED is constantly on, it means that both sources are locked in frequency or one source is greater than 20° out of phase. Turn the In-Phase monitor off.
What to do if S2 Generator will not shut down on my GE Zenith Controls ZTX?
If the S2 Generator will not shut down, wait for the U timer to expire. Alternatively, the Automatic Exerciser may be in process.
How to fix a GE Zenith Controls ZTX Switch when S1 Position LED is Blinking?
If the S1 Position LED is blinking on your GE Zenith Controls Switch, the SN limit switch may be bad or intermittent. Check the connection or the SN limit switch itself.
Operational and maintenance guide for GE Zenith ZTX Series Automatic Transfer Switches.
Explains the primary role and operational capabilities of GE Zenith transfer switches.
Procedures for inspecting and storing the transfer switch to prevent damage.
Ensures all checks are complete before powering up the transfer switch.
Guidance on proper mounting locations and considerations for the transfer switch.
Detailed steps for connecting power sources and loads to the transfer switch terminals.
Information on terminal types, wire sizes, and connection methods.
Instructions for wiring engine start controls and other system interconnections.
Specifies the correct torque values for tightening power connection lugs.
Details on installing the battery and holder for the automatic exerciser feature.
Step-by-step guide to test the automatic transfer switch's operation.
Explanation of the timers and sequence for source transfer and retransfer.
Guide to configuring the controller for specific system voltage and frequency requirements.
Meaning and function of each LED indicator on the control interface.
Description of the purpose and operation of each control pushbutton.
How to simulate a power outage and test the transfer sequence using the TEST key.
Procedure for programming and canceling automatic generator exerciser tests.
How to use Timer Bypass and Cancel keys for operation control.
Details on scheduling, running, and managing automatic generator exerciser tests.
Options for configuring the exerciser to include or exclude load transfer.
Explanation of the in-phase monitor's role in synchronizing power sources.
Instructions for enabling or disabling the in-phase monitor functionality.
Illustrates a typical partial coverage system wiring with the transfer switch.
Illustrates a typical total coverage system wiring with the transfer switch.
Detailed electrical schematic for power circuits of the transfer switch.
Visual representation of component placement on the transfer switch power panel.
Diagram and details for the interconnect plug connections.
List of available replacement parts for 40-200 Amp standard transition models.
List of available replacement parts for 225-400 Amp standard transition models.
General| Type | Automatic Transfer Switch |
|---|---|
| Voltage Rating | Up to 600 VAC |
| Poles | 2, 3, 4 |
| Current Rating | 30-4000A |
| Enclosure Type | NEMA 1, 3R, 4, 12 |
| Control Type | Microprocessor |
| Standards | UL 1008, CSA C22.2 |
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