Haulotte Optimum 8 (Optimum 1931 E): electric scissor lift, newer generation
Haulotte error code F02.04 — Power Contactor
Message on the display: Power Contactor
Code F02.04 occurs in machines: Haulotte OPTIMUM 8, OPTIMUM 1931 E.
blocking fault
[case 1] The driver of main contactor drive coil is shorted, or its coil is disconnected. If wiring and connection are correct, the problem is in the controller : Replace it. [case 2] The main contactor coil has been driven by the controller, but the contactor does not close. [case 4] Before driving the line contactor coil, the controller checks if the contactor is stuck. The controller drives the bridge for some tens milliseconds, trying to discharge the capacitors bank. If they don't discharge the fault condition is entered. [case 8] Supervisor status is "alarm" or "wait reset" and main contactor is not forced open. Key OFF/ON.
Description from the Haulotte service manual, in the original wording.
Possible causes
- Ensure there is no short or low-impedance pull-down between MC and -Vbatt.
- Check connections and wiring for interruptions of MC DRIVE coil.
- Check the contact in the main contactor drive contactor and if it is not working, replace the main contactor drive.
- Check the power contact of the main contactor drive and replace it if necessary.
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 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 F02.04 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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