No DC output (ATC fuses blown)

Progressive Dynamics Power Converter: “No DC output (ATC fuses blown)”

warning RV power converter problems

Safety A reversed battery connection can damage wiring and cause sparks near hydrogen gas. Disconnect AC and the battery before touching fuses, and never substitute a higher-rated fuse, which can let the converter overheat.

What it means

When an Inteli-Power converter produces no 12 V output, the most common cause is that the external reverse-battery protection fuses (one to three 30 A ATC blade fuses on the converter, depending on model) have blown. These fuses are designed to sacrifice themselves if the battery is ever connected backwards, and they are also the main DC link between the converter and the coach.

Most likely causes

Battery was connected in reverse polarity, even momentarily, blowing the external ATC fuses most likely
No incoming AC (tripped breaker, unplugged shore cord, generator off) so the converter is not powered common
Open inline fuse or loose connection in the battery wiring installed by the RV maker common
Overvoltage shutdown from an AC input spike (clears when input returns to normal) less common
Internal converter failure rare

Safe checks you can do yourself

Verify the unit has live AC: check the RV's main breaker and that shore power or the generator is on (105-130 VAC).
Disconnect any optional pendant/TCMS module (it must be removed to reach the fuses), then inspect the external 30 A ATC fuses for a broken element.
Replace blown fuses only with the same type and 30 A rating after confirming the battery is wired correctly.
Using a DC voltmeter, check converter output; ~13.6 V indicates it is working.
Check for an open inline fuse or loose terminal in the battery cable run.

How to reset / clear No DC output (ATC fuses blown)

Disconnect AC power before replacing fuses.
Correct any reverse battery connection first, then install fresh 30 A ATC fuses.
Reconnect the pendant/TCMS module, restore AC, and re-verify output voltage.

When to call a technician

Fuses are intact and AC is present but output is still 0 V, fuses blow again immediately after replacement, or you find melted/scorched wiring.

Applies to

PD9130 · PD9140A · PD9145A · PD9155 · PD9160A · PD9180 · PD9200 series

FAQ

What does Progressive Dynamics Power Converter code "No DC output (ATC fuses blown)" mean?

How do I reset Progressive Dynamics Power Converter No DC output (ATC fuses blown)?

Disconnect AC power before replacing fuses. Correct any reverse battery connection first, then install fresh 30 A ATC fuses. Reconnect the pendant/TCMS module, restore AC, and re-verify output voltage.

What is the most common cause of No DC output (ATC fuses blown) on a Progressive Dynamics Power Converter?

The most likely cause is battery was connected in reverse polarity, even momentarily, blowing the external atc fuses.

Related · Progressive Dynamics power converter

Charge Wizard — Boost (solid LED)
On an Inteli-Power converter fitted with a Charge Wizard or … Charge Wizard — Normal (rapid blink)
A fast-flashing indicator (roughly one to five flashes per s… Charge Wizard — Storage (slow blink)
A brief flash about once every 6-8 seconds means the Inteli-… Cycling on/off (thermal shutdown)
If the Inteli-Power converter repeatedly switches on and off…

Sources

PD9100 Series Owners Manual (109205n) — Reverse Battery Protection Circuit; Troubleshooting - External Fuses Blown (Progressive Dynamics, Inc.)
PD9100/9200 Series Power Converter Owner's Manual — 110953E - No-output troubleshooting, verify output with voltmeter (Progressive Dynamics, Inc.)

Note: Fuse count varies by amperage model (PD9130 has one 30 A fuse; mid models two; PD9180 three). Some symptoms (overheating cycling on/off) point to airflow, not fuses.

● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.