Transfer Switch

[Chinolbz]

I think my TS is dead. No 110v getting through. Any way to jump around it to keep me going while dry camping on a gen? Thanks

[Veebyes]

Simply put, bypass the transfer switch. My factory one went bad while on a trip. No built in genny. Inverter was wired direct to 120V breaker box.

Another trick to try. Maybe the shore power portion of the ATS is faulty. Move that input to the genny or inverter input.

There is always more than one way to get around a problem.

[ssia2485]

I just eliminated mine all together. I put a 50 amp receptacle on the generator feed and jut plug the shore cord into the 50 amp generator plug when I need generator power. I replaced my ATS twice. They are cheaply built and unreliable.

[Chinolbz]

Ordered a new one and swapped a couple of wires inside for now. Disabled wire to the inverter to keep the smoke in. Chino

[time2roll]

Chinolbz wrote:
No damage inside the TS. Panel breakers are good. Power to one side of the points. It won't engage the relay to move the arm to power up the AC side?

OK so just remove and connect the appropriate wires. Large wire nut or if there is room on the TS connectors for both wires use them.

[hypoxia]

Chinolbz wrote:
No damage inside the TS. Panel breakers are good. Power to one side of the points. It won't engage the relay to move the arm to power up the AC side?

Make & Part number would help. Is it just a transfer switch or is it also a surge guard?

[Chinolbz]

No damage inside the TS. Panel breakers are good. Power to one side of the points. It won't engage the relay to move the arm to power up the AC side?

[time2roll]

Really need to open the box and inspect for heat damage or loose connections.
Post a picture of the inside if you can.

[CA_Traveler]

Most common fault is tripped CB followed by ATS, gen, wiring. The inverter has nothing to do with getting gen power to the rig.

You NEED to isolate the problem area. From all we know you're getting AC to the rigs main CB panel and the problem is there.

[Chinolbz]

Thanks all who replied. What is the common fault? Timer or energizing relay. My setup has the inverter as default (works fine) Post and gen when energized I think. Chino

[bob_nestor]

time2roll wrote:

ADAD437 wrote:
if transfer switch goes bad it should default to generator therefore you should have power when gen. is running. been there done that.

I thought standard TS was connected to the cord as default. If you start the generator there is often a 20 second delay to switch.

And when things fail they don't necessarily reset to some position. Could be a loose or burnt connection for all we know.

Yeah, the last two RVs I've owned were wired this way. If it was me, I'd grab a meter and track it down. My previous RV had a loose neutral in the main circuit box and I wasn't getting 110v from either shore or generator. So I'd check there first, then move up the line to the Transfer Switch checking inputs from both shore and generator as well as the output from the TS in both cases.

[CA_Traveler]

time2roll wrote:

ADAD437 wrote:
if transfer switch goes bad it should default to generator therefore you should have power when gen. is running. been there done that.

I thought standard TS was connected to the cord as default. If you start the generator there is often a 20 second delay to switch.

And when things fail they don't necessarily reset to some position. Could be a loose or burnt connection for all we know.

X2

I would not rewire until it's established that the gen is OK. Unfortunately this is a check that most RV's should not do because of their understanding and the safety risks involved. Ditto for rewiring AC.

OP, Check the voltage or get help to isolate the cause.

[time2roll]

ADAD437 wrote:
if transfer switch goes bad it should default to generator therefore you should have power when gen. is running. been there done that.

I thought standard TS was connected to the cord as default. If you start the generator there is often a 20 second delay to switch.

And when things fail they don't necessarily reset to some position. Could be a loose or burnt connection for all we know.

[cavie]

Disconnect the GEN leads and the ATS output leads and wire nut or split bolt them together until you can find and electrician to have a look.

ATS is 2 power sources in and 1 power source out. Its just a selector switch.

[wa8yxm]

ADAD437 wrote:
if transfer switch goes bad it should default to generator therefore you should have power when gen. is running. been there done that.

Not necessarly... the ATS in my unit "Defaults" to generator if it has a choice of shore or gernny.. but if it fails it sticks on shore in most cases (one failure mode stays on "Current source" but the rest go to shore.

Transfer switches come in two main types.. Mine on shore power is "Not energized" that is the solenoids are "off" no current in the coils.. Fire up the genny and about 1 minute later the coils energerize and it transfers.

Another type has two sets of normally open contactors. When shore power comes one set pulls in, Generator pulls in the other.. In some cases neither selects inverter (if it has that option).