Haulotte error code F04.05 — Boom

blocking fault

[case 1] b0 Proportional output's failure : Upwards boom movement --> YV520U=FAIL [case 2] b1 Digital output's failure : Downwards boom movement --> YV520D=FAIL [case 4] b2 Digital output's failure : Safety boom movement --> YV802=FAIL Failure is detected only during telescope extend or boom movement ( GND2 is the common ground supply for YV801 and YV802 electrovalves). Otherwise, YV802 is seen as open circuit. [case 8] b3 Digital output's failure : Safety ground boom movement --> GND2=FAIL Failure is detected only during telescope extend or boom movement ( GND2 is the common ground supply for YV801 and YV802 electrovalves). Otherwise, GDN2 is seen as open circuit. [case 16] b4 Digital output's failure : Safety boom descent movement --> YV807=FAIL Failure is detected only during turntable or boom descent movement ( GND5 is the common ground supply for YV805 and YV807 electrovalves). Otherwise, YV805 is seen as open circuit. [case 32] b5 Digital output's failure : Safety ground boom descent movement --> GND5=FAIL Failure is detected only during turntable or boom descent movement ( GND5 is the common ground supply for YV805 and YV807 electrovalves). Otherwise, GDN5 is seen as open circuit.

Description from the Haulotte service manual, in the original wording.