Felicity Inverter Error Codes: Complete Troubleshooting Guide

When your Felicity IVPS inverter displays an error code or warning LED, it is telling you exactly what went wrong. Understanding these codes helps you resolve issues quickly — often without calling a technician. This guide covers every common error code and its solution.

How to Read Error Codes

Felicity IVPS inverters display error codes on the LCD screen. The code appears as a fault number (e.g., F01, F02) along with a brief description. Some models also use LED indicators — solid red means a fault, flashing red means a warning.

Common Error Codes and Fixes

F01 — Overload

Cause: The connected load exceeds the inverter's continuous power rating.

Fix:

1. Disconnect high-power appliances (AC, heater, pump) one at a time
2. Check if multiple heavy loads started simultaneously
3. Verify your total load does not exceed the inverter rating
4. If loads are within rating, check for a faulty appliance drawing excessive current

F02 — Over-Temperature

Cause: Internal temperature exceeds safe operating range (usually above 65 degrees C).

Fix:

1. Check that ventilation around the inverter is not blocked
2. Ensure the inverter is not in direct sunlight or near a heat source
3. Clean dust from ventilation grilles and internal fans
4. Reduce load to lower heat generation
5. If the fan is not spinning, see F06 below

F03 — Battery Low Voltage

Cause: Battery voltage has dropped below the low-voltage disconnect threshold.

Fix:

1. Check battery connections for looseness or corrosion
2. Measure battery voltage with a multimeter — should be above 44V for 48V systems
3. If batteries are depleted, allow solar charging before restarting
4. Check if a load was left on overnight that drained the bank
5. Verify the low-voltage disconnect setting matches your battery type

F04 — Battery Over Voltage

Cause: Charging voltage exceeds the maximum safe level (usually above 58V for 48V lead-acid).

Fix:

1. Check charge controller settings — absorption voltage may be set too high
2. Verify battery type setting matches your actual battery (LiFePO4 vs GEL vs flooded)
3. If using an external charge controller, check its voltage set points
4. A faulty charge controller may overcharge — replace if settings are correct but voltage keeps rising

F05 — Short Circuit

Cause: A short circuit detected on the AC output.

Fix:

1. Disconnect ALL loads from the inverter output
2. Inspect all AC wiring for exposed conductors or damaged insulation
3. Check appliance plugs and extension cords for damage
4. Reconnect loads one at a time to identify the faulty circuit
5. If the error persists with no loads connected, the inverter may need service

F06 — Fan Failure

Cause: Cooling fan is not responding or spinning below minimum speed.

Fix:

1. Listen for fan noise — if silent, the fan motor may be dead
2. Open the ventilation area and check for debris blocking the fan
3. If dust-clogged, clean with compressed air
4. Replacement fans are available from Felicity Solar service centres

F07 — Solar Input Over Voltage

Cause: Solar panel open-circuit voltage exceeds the charge controller's maximum input.

Fix:

1. Check your solar string configuration — you may have too many panels in series
2. Measure Voc with a multimeter at the solar input terminals
3. Reconfigure panels to reduce string voltage (add parallel strings instead)
4. Note: Voc rises in cold weather — design with a 10-15% cold-weather margin

Warning Indicators (Not Faults)

Indicator	Meaning	Action
Battery charging LED flashing	Bulk charging active	Normal — no action needed
Load LED flashing	Load near capacity limit	Consider reducing load
Buzzer beeping intermittently	Battery approaching low threshold	Reduce non-essential loads

When to Call a Technician

• Error code persists after following all troubleshooting steps
• You smell burning or see scorched components
• The inverter will not power on at all
• Multiple error codes appear simultaneously
• The LCD screen is blank or displaying garbled text