This maybe helps,
Manual 26.1
26.1. Device firmware deletion and recovery
There a a few exceptional situations which require the device firmware to be
deleted before it can be reprogrammed using the aquasuite:
● The aquaero is programmed with the expansion device firmware.
● A previous firmware update failed, power loss during firmware update.
● Device firmware is corrupt.
Delete the device firmware using the following procedure:
1. Shut down the PC and disconnect all cables from the aquaero except
the power supply.
2. Place jumpers on temperature sensor input 5, 6, 7 and 8.
3. Supply power to the aquaero and wait for approximately 60 seconds.
The device display will show information on the deletion process.
4. Shut down the power supply and remove the jumpers from the tempera-
ture sensor inputs.
5. Connect the USB port of the aquaero to the PC's motherboard and turn
the power supply on.
6. Start the aquasuite software and perform a firmware update.
7. Shut down the PC, reconnect all cables, then reboot the PC.