Haulotte Optimum 8 (Optimum 1931 E): electric scissor lift, newer generation
Haulotte error code F01.05 — Pump failure
Message on the display: Pump failure
Code F01.05 occurs in machines: Haulotte OPTIMUM 8, OPTIMUM 1931 E.
blocking fault
[case 1] COMBIACX: The software waits for the motor pump to stop at start-up. If the motor connected to "-P" is still moving, wait for it to be still. If not, wait 30 seconds until alarm "PUMP VMN NOT OK" appears. [case 2] COMBIACX: Pump driving voltage different than the expected one. Key OFF/ON. [case 4] COMBIACX: The pump motor output voltage is lower than expected, considering the control applied. If no problem is found on the motors, replace the controller. [case 8] COMBIACX: The pump motor output voltage is higher than expected, considering the control applied. If no problem is found on the motors, replace the controller. [case 16] COMBIACX: The pump current sensor feedback is always 0A, even if pump motor is running. Type of default not related to external components. Cycle power to clear the fault. If the fault is not cleared, replace the controller.
Description from the Haulotte service manual, in the original wording.
Possible causes
- Refer to corresponding alarm chapter.
- Check the motor power wiring and connections.
- Check the motor phases for proper insulation with the chassis.
- Check that MC DRIVE power contact close properly, with a good contact.
- Check that main contactor drive power contact close properly, with a good contact.
- Check the pump motor connection and continuity.
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.
Solution from the manual
Refer to corresponding alarm chapter. Check the motor power wiring and connections. Check the motor phases for proper insulation with the chassis. Check that MC DRIVE power contact close properly, with a good contact. Check the motor power wiring and connections. Check the motor phases for proper insulation with the chassis. Check that main contactor drive power contact close properly, with a good contact. Check the pump motor connection and continuity.
Source: Haulotte Maintenance Book Optimum 8 (4001069810), 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 F01.05 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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