TRC Surge Guard 40350 RVC User manual

The 40350 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 40350 display
to see if an error message is displayed. The screen will ash 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 instead reads “Delay Active” this means that the
fault condition has cleared and that 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.
CAUTION: To avoid damage to the transfer switch or the RV, the torque specications
TROUBLESHOOTING GUIDE
Model 40350 RVC
Automatic Transfer Switch
PROBLEM TROUBLESHOOTING STEPS
Unit does not engage shore
contactor when shore power
is present after 10 seconds.
• If available, check the 40350 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 incoming ground wire.
• Double check all wiring connections into the ATS and make sure that they are all properly torqued down.
Unit does not transfer to
generator power correctly
when the generator is
turned on.
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 40350 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 x 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.
• Verify that the incoming neutral is at the same voltage as the green incoming ground wire.
• Double check all wiring connections into the ATS and make sure that they are all properly torqued down.
For technical assistance, please call 1-800-780-4324 x 20311
TECHNOLOGY RESEARCH, LLC A Southwire Company
5250 140th Avenue North ▪ Clearwater, Florida 33760
505-00114A
on the terminal block cable installation 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 re hazard. Care
must be taken to assure that the terminal screws are not cross threaded, otherwise an improper torque will result.

TROUBLESHOOTING GUIDE
For technical assistance, please call 1-800-780-4324 x 20311
TECHNOLOGY RESEARCH, LLC A Southwire Company
5250 140th Avenue North ▪ Clearwater, Florida 33760
505-00114A
ERROR MESSAGE DESCRIPTION
Check to make sure that the ATS is properly grounded. The green wire
going into the transfer switch should be properly attached to the terminal
block (see installation manual). The other end of the green wire should
be properly grounded to the RV. If there is a voltage difference between
the incoming neutral (white) and the ground (green), the transfer switch
will not allow the contactor to engage. If all of the connections are
correct and this message still displays, then there is a bad ground at the
input power pedestal and a different pedestal should be used.
Check the voltage level on the incoming generator lines. If it is outside
of 102-132V, the ATS will protect your RV by not letting the contactor pull
in. Refer to the generator documentation to adjust the incoming voltage
to within acceptable limits.
The transfer switch constantly monitors the incoming frequency to verify
that it is within 55-70 Hz. If it is outside these limits, the transfer switch
will protect the RV by keeping the contactor open. If this error message
occurs on generator power, check the generator documentation to
adjust frequency to within acceptable limits.
This indicates a possible faulty connection on the input power to the
transfer switch. With the power off, verify that all input cables are properly
connected to the transfer switch. Also conrm that the generator circuit
breaker is not tripped. After these steps, measure the voltage on the
incoming generator connection to verify that it is within limits.
With the power off, make sure the connection is correct to the transfer
switch terminals. Reverse polarity occurs when one of the hot leads
(L1, L2) is mis-wired into the neutral (N) terminal. In this condition the
transfer switch will not allow the contactor to close.
This indicates that one of the fuses for the surge protectors on the
transfer switch control board has blown. This will not affect normal
transfer switch operation; however, the fuse on the board must be
replaced in order to keep the surge protection capability
Model 40350 RVC
Automatic Transfer Switch
TROUBLESHOOTING ERROR CODES
Questions or concerns? Call our technical support department at 800-780-4324 x 20311 or
email [email protected]
NO
GROUND
HIGH/LOW
VOLTAGE
HIGH/LOW
FREQUENCY
L1/L2
OPEN
REVERSE
POLARITY
CHECK
SURGE
(For optional 40299 Remote LCD Display)