Southwire SURGE GUARD 41390 RVC Troubleshooting Manual

TROUBLESHOOTING GUIDE
Model 41390 RVC
Automatic Transfer Switch
The 41390 series automatic transfer switch (ATS) has many different protective features to protect your
coach from low quality power. Included in these are protection against high voltage, low voltage, and an
incorrectly connected chassis ground. If one of these fault conditions is encountered, the ATS will open
both contactors in order to protect the coach. Once the fault condition goes away, the ATS will delay for
approximately 2.5 minutes before trying to close the appropriate contactor again.
If the ATS fails to close the contactor or transfer when expected, check the 41390 display to see if an error
message is displayed. The screen will flash an error message for that failure such as "Loss of Ground",
"High Volt", or "Reverse Polarity". The error condition must be corrected in order for the transfer switch
to function correctly. Refer to the table on the following page for help in troubleshooting these conditions.
If there is no error message, and the display reads "Delay Active", the fault condition has cleared and the
switch is going through a 2.5 minute delay before it will attempt to close the contactor again. Wait until this
delay is over to see if the ATS correctly closes its contactor.
If no display is available, check the level of the input voltage to ensure it is within the proper operating
limits. Also, check that the ATS is correctly connected to chassis ground and that the neutral conductor is
correctly connected to ground at the power pedestal. Wait 2.5 minutes to check if the fault condition was
temporary and has cleared. If so, the contactor will pull in at the end of the 2.5 minute period.
PROBLEM
Unit does not engage shore contactor when
shore power is present after 10 seconds.
Unit does not transfer to generator power
correctly when the generator is turned on.
CAUTION:
To avoid damage to the transfer switch or the RV, the torque specifications on the terminal block cable instal-
lation diagram MUST be followed. Make sure that the screws holding the input and output power cables down to the terminal
block are fully tightened to the correct torque. Failure to fully tighten these connections could cause an electrical shock or fire
hazard. Care must be taken to assure that the terminal screws are not cross threaded, otherwise an improper torque will result.
For technical assistance, please call 1-800-780-4324 x 20311
Manufactured by Southwire Company, LLC, 4525 140th Avenue North, Suite 900, Clearwater, Florida 33762
© 2017 Southwire Company, LLC. All rights reserved.

TROUBLESHOOTING STEPS

• If available, check the 41390 display screen to see if an error message is displayed. Refer
to Table 2 for further troubleshooting.
• Check the input power at the RV pedestal. If the power is outside of the range of 102-
132V, the unit will protect the RV by not engaging the contactor. Move to a different source
of power that is within the correct limits.
• Check to make sure that the incoming power is within 55-70 Hz in frequency.
• Check to make sure that the incoming neutral is at the same voltage as the green incom-
ing ground wire.
• Double check all wiring connections into the ATS and make sure that they are all properly
torqued down.
Note that the ATS takes approximately 50 seconds to complete the transfer from shore power
to generator power after the generator is started. If this amount of time has passed and the
generator contactor still does not engage, check the following:
• If available, check the 41390 display screen to see if an error message is displayed. Refer
to Table 2 for further troubleshooting.
• Check the voltage level on the incoming generator lines. If the power is outside of the
range of 102-132V, the unit will protect the RV by not engaging the contactor. Refer to
generator documentation to fix incoming voltage within acceptable limits.
• Check the incoming generator circuit breaker to ensure it is not tripped.
• Check to make sure that the incoming power is within 55-70 Hz in frequency.
• Check to make sure that the incoming neutral is at the same voltage as the green incom-
ing ground wire.
• Double check all wiring connections into the ATS and make sure that they are all properly
torqued down.
* Trademark of Southwire Company, LLC. Registered in the United States.
506-00014B