Magnum MS inverter charger fault codes
The Magnum MS inverter/charger has two jobs. With good shore or generator power on the input it closes an internal transfer relay, passes that AC straight through to the inverter output (Standby) and charges the batteries. Without it, it inverts battery power to 120 VAC.
Magnum inverter: Off
Inverter off or faulted. Low battery, high battery, overload, over-temperature or internal fault. See below.
Magnum inverter: Slow flash (1 per 8 s)
Float charging, Standby. AC input is passing through to the loads. Normal.
Magnum inverter: Medium flash (1 per s), no AC in
Inverting or Searching. Search mode waits for a load over 5 W (default). Small loads like a clock may not wake it.
Magnum inverter: Medium flash, AC in
Absorb charging, Standby. Normal.
Magnum inverter: Solid on
Bulk charging, Standby. Normal.
Learn the system
Practice it on a service call
Guided diagnosis
Full field guide: Magnum MS inverter charger
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.