Essential for technicians: the schematic shows internal components (transformer, rectifier bridge, capacitor bank, output relay). Use this only if qualified; capacitor discharge can take up to 5 minutes after disconnection.

The Pramac AC03 is a compact, portable generator designed for light construction, DIY, and standby power applications.

Key Specifications (Typical):

The AC03 manual has a very simple troubleshooting tree. Here is the short version:

A: (Only if your manual includes a setup section) They select battery chemistry:

Manual solution (Section 3 – Compatible Battery Types):
Check the rear label. If it says "Only for lead-acid", do not use with lithium. If it has a "Li-Ion" or "LiFePO4" setting (via a jumper or DIP switch), follow the manual’s voltage chart: typically 14.2V bulk, 13.6V float. Using lead-acid algorithms on lithium will destroy the battery.

To keep your AC03 service life of 10+ years, follow this routine:

| Interval | Task | Manual Reference | |----------|------|------------------| | Monthly | Clean vents with compressed air (dust reduces cooling). | Section 6.1 | | Quarterly | Check all cable connections for corrosion or loosening. | Section 6.2 | | Bi-annually | Verify output voltage under load (13.8–14.7V depending on mode). | Section 6.3 | | Annually | Replace AC input fuse (even if not blown – oxidation causes resistance). | Section 6.4 |

Important: The manual warns against opening the main casing. There are no user-serviceable parts inside except the external fuse holder.

Manual solution (Section 4.2 – Output Protection):
The AC03 has a reverse-polarity and short-circuit protection that disables output until reset. Disconnect the battery, wait 30 seconds, then reconnect correctly (positive to positive, negative to negative). If the issue persists, the manual instructs you to measure battery voltage – below 2V per cell triggers a "dead battery" detection (some models will not attempt to charge).