Haulotte: Activ'Screen (HA/HT RTJ, PRO) and ZAPI controllers (Compact, Optimum)
Haulotte error code F07.01 — Low Position SQ900/SQ421/ — SQ520
Message on the display: Low Position SQ900/SQ421/ — SQ520
blocking fault
b0 Failure : Incoherence states between SQ900 and SQ421 sensor's value : --> SQ900=ON & SQ421=OFF Machine folded, check the state of the sensors : --> SQ900=ON & SQ421=ON Then unfold slowly the machine and check the next sensor's state is : --> SQ900=OFF & SQ421=ON Then unfold slowly the machine and check the next sensor's state is : --> SQ900=OFF & SQ421=OFF b1 Failure : Incoherence states between SQ900 and SQ520 sensor's value : --> SQ900=ON & SQ520=OFF Machine folded, check the state of the sensors : --> SQ900=ON & SQ520=ON Then unfold slowly the machine and check the next sensor's state is : --> SQ900=OFF & SQ520=ON Then unfold slowly the machine and check the next sensor's state is : --> SQ900=OFF & SQ520=OFF
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 HA16 RTJ / RTJ O / RTJ PRO (4000865070) and Compact 8–14 (4001181580, ZAPI alarms).
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 F07.01 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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