Fendt A.1.1C – A002 - ECU, enhanced control: Spool valve fault, valve 1. Floating position has been set manually

Triggered when the system detects that the #1 auxiliary control valve (Y015, Yellow) has been manually overridden or forced into the floating position, bypassing the electronic controls.

• 411 Vario COM III
• 412 Vario COM III
• 413 Vario COM III
• 414 Vario COM III
• 415 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 718 Vario COM III
• 818 Vario COM III
• 820 Vario COM III
• Farmer 400 Vario series (409, 410, 411, 412)
• Favorit 700 / 700 Vario series (711, 712, 714, 716)
• Favorit 900 / 900 Vario series (916, 920, 924, 926, 930)
• 300 Vario series
• 800 Vario series
• COM III Vario series

1. 1

   Verify if the operator intentionally used the emergency manual actuation lever/hand pump on the valve block (informational alert only).

2. 2

   Inspect the manual override mechanism on the Y015 valve (Valve 1, Yellow) for physical binding, dirt, or debris holding the spool in the manual/float position.

3. 3

   Check electrical connector X326 for corrosion, moisture, or backed-out pins (specifically pins 23, 24, and 26).

4. 4

   Check hydraulic oil and filters for contamination, which may cause the main piston to stick internally and fail to return to neutral.

1. 1

   Clear the Code

   If the manual override was used intentionally, simply acknowledge and clear the fault code via the tractor's terminal. No repair is necessary.

2. 2

   Clean and Lubricate

   If the code is active but the manual override was not intentionally used, thoroughly clean the exterior of the Y015 valve block. Free up the manual actuation mechanism and ensure the spool springs back to the neutral position freely.

3. 3

   Service the Connector

   Disconnect connector X326, clean the contacts with electrical contact cleaner, apply dielectric grease, and reconnect.

4. 4

   Flush Hydraulics

   If the valve is sticking internally due to debris, flush the hydraulic system and replace the high-pressure hydraulic filters.

5. 5

   Replace the Valve

   If the valve's internal position pickup sensor has failed, or if the spool is permanently scored/jammed, the Y015 auxiliary control valve section must be replaced.

6. 6

   Recalibrate

   If the valve is replaced, you must perform an End-of-Line (EOL) calibration using the tractor's terminal. For Valve 1, use Calibration code 1003 (Calibration, linear module 1 - hydr. auxiliary control valve).