Fault codes / Converter / 2 to 3 blinks per second

Converter: 2 to 3 blinks per second

What it means: Equalize, 14.4V for 15 minutes.

What to check

Desulfation pulse every 21 hours in storage. Normal.

Learn the system

• Volts, amps and ohms, the simple way
• Voltage drop: the test that finds bad grounds
• Practice: find the bad connection
• Batteries: lead-acid vs lithium

Practice it on a service call

• Back lights are dim
• Battery dies even on shore power
• Lithium won't charge on cold mornings

Guided diagnosis

• 12v System
• Converter / Charger

Other Converter codes

• Converter: LED on steady Boost, 14.4V
• Converter: 1 blink per second Normal, 13.6V
• Converter: 1 blink every 6 to 8 seconds Storage, 13.2V
• Converter: LED off No output or no 120V
• Converter: 13.2V Trickle or float
• Converter: 13.6V Absorption
• Converter: 14.4V Bulk
• Converter: Output present, no battery charge Fuse or wiring, not the converter

Full field guide: Progressive Dynamics Charge Wizard and WFCO converter

Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.