Fault

F35

The inner temperature over.

6 Devices that report this code

What does the F35 error code mean?

F35 on a Felicity unit indicates: The inner temperature over.. It is a fault-severity event that can appear on 6 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a fault-severity code

Fault codes stop normal operation but the unit may attempt to recover. Common causes are out-of-range conditions (voltage, current, temperature) that require checking inputs and outputs before restart.

What triggers this code

F35 is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

Apollo-5KLP1G01-MXEnergy storage system↗ view on device
F35The inner temperature over.Fault
Description

Inner temperature exceeds the allowed limit.

Cause

The inner temperature over.

Recommended fix

Check whether the ambient temperature is too high.

Source:Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf · page 43
IVEM 6048Inverter↗ view on device
F35Overvoltage occurs in BUS.Fault
Description

Fault: Overvoltage occurs in BUS.

Cause

AC surge or PV surge or internal components failed.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf · page 38
IVEM8048-IIInverter↗ view on device
F35Overvoltage occurs in BUS.Fault
Description

Fault: Overvoltage occurs in BUS.

Cause

AC surge or PV surge or internal components failed.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44
T-REX-10KHP3G01Inverter↗ view on device
F35The inner temperature over.Fault
Description

Inner / internal temperature too high.

Recommended fix

Check whether the ambient temperature is too high.

Source:T-REX-10KHP3G01-Inverter-User-Guide.pdf · page 29
T-REX-10KLP3G01Inverter↗ view on device
F35The inner temperature over.Fault
Description

The inner temperature is too high.

Cause

Ambient temperature is too high.

Recommended fix

Check whether the ambient temperature is too high.

Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf · page 28
T-REX-50KHP3G01Inverter↗ view on device
F35Bus software overvoltage fault.Fault
Description

Bus voltage is too high, shutdown and restart.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 46

Frequently asked about F35

What is the F35 error on Felicity?
F35 on a Felicity unit means: The inner temperature over.. It can appear on 6 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the F35 code myself?
It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the F35 fix the same on every device?
The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?
Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.