Haulotte HT26 RT O, HT28 RTJ O, HT28 RTJ PRO
Haulotte error code F11.11 — Boom Speed Incoh
Message on the display: Boom Speed Incoh
Code F11.11 occurs in machines: Haulotte HT26 RT O, HT26 RT O SW, HT28 RTJ O, HT28 RTJ O SW, HT28 RTJ PRO.
blocking fault
Boom speed of the raised movement is too fast. Failure in PVG behavior. The failure remains active once occurred, even if the machine is powered OFF then ON, and is only reset if machine if folded. When boom angle is not calibrated, the failure is also reset if machine is powered OFF then ON, in order to not fall into a locked situation where it is impossible to calibrate (because of the failure which prevents boom raise) and it is also impossible to reset the failure (because machine is considered as unfolded in P3 position when boom angle is not calibrated).
Description from the Haulotte service manual, in the original wording.
Possible causes
The manual does not list the causes for this code: the service technician establishes them during diagnosis of the machine.
What you can do
Switch the machine off with the emergency stop and switch it on again. If the code comes back, do not use the machine and call service.
What service does
A qualified service technician reads the code with the manufacturer's diagnostic tools, finds the cause, clears the code and carries out a function test.
Source: Haulotte Maintenance Book HT28 RTJ (4001005000), fault codes chapter.
The descriptions are quoted from the manufacturer's service documentation and are for guidance only. Clearing codes, calibrations and repairs are carried out by a qualified service technician according to the manual for the specific serial number. A machine with an active blocking code must not be used until the cause has been removed.
Does code F11.11 not go away?
RK Rental services Haulotte lifts at our workshop or on site at the customer's premises (construction site, factory, warehouse). We read the code, remove the cause and select the parts by serial number.
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