Can I clear the 90 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 90 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.

Fault

90

Q: What does 90 mean on IVCM1012 PRO?

DSP BootLoad is not written. Recommended fix: Contact the repair center.

Q: What does 90 mean on IVGM5KL-P1G1?

Parallel host inverter lost. Recommended fix: 1. Check whether Parallel cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.

DSP BootLoad not written.

2 Devices that report this code

What does the 90 error code mean?

90 on a Felicity unit indicates: DSP BootLoad not written.. It is a fault-severity event that can appear on 2 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

90 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.

IVCM1012 PROInverter↗ view on device

90DSP BootLoad not written.Fault

Description

DSP BootLoad is not written.

Recommended fix

Contact the repair center.

Source:ICM.pdf · page 14

IVGM5KL-P1G1Inverter↗ view on device

90Parallel Host Lost.Fault

Description

Parallel host inverter lost.

Recommended fix

1. Check whether Parallel cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.

Source:Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56

Frequently asked about 90

What is the 90 error on Felicity?: 90 on a Felicity unit means: DSP BootLoad not written.. It can appear on 2 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the 90 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 90 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.