2017.06.19 FwdMan2.8.17.docx 20-175
Error 643: Drop Timeout
The time from initiation of the Drop mode until activation of the trigger (TG)
proximity switch has exceeded a predetermined time limit (2 sec. typ.).
Possible causes:
TG proximity switch defective.
Hydraulics need bleeding.
Hydraulics failure.
- If the weight actually dropped, then the TG switch MAY be defective.
- Check that "TG" on Computer corresponds to TG LED ON in the Trailer.
- If Drop causes the weight to raise more than approx. 20 mm (1"),
before it is dropped, then the raise weight cylinder needs bleeding
(or C valve is bad).
Refer to the Manual for bleeding instructions.
- Check that the hydraulic valves, the motor and the motor relay are powered
and functioning properly (refer to the Manual).
- Increase the Drop (until TG on) time limit to 5 seconds max.
Error 644: Lower catch Timeout
The time from initiation of the Lower Catch mode until pressure switch No. 2
(P2) is Deactivated AND P1 is activated, has exceeded a predetermined time
limit (5 sec. typ.).
Possible causes:
Pressure switch P2 and/or P1 defective or improperly adjusted.
Hyd. pump excess pressure is too low.
Hydraulics failure.
- Check that "P2" on Computer corresponds to P2 LED ON in the Trailer
(and "P1" to P1 LED OFF!).
- Refer to the Manual for adjustment instructions.
- Check that the hydraulic valves, the motor and the motor relay are powered
and functioning properly (refer to the Manual).
- Increase the Lower Catch (until P2 off) time limit to 6 seconds max.
Error 645: Raise Plate Timeout
The time from initiation of the Raise Plate mode until activation of the PH
proximity switch(es) AND the P1 pressure switch has exceeded a predetermined
time limit (15 sec. typ.).
Possible causes:
Pressure switch P1 defective or improperly adjusted.
Hyd. pump excess pressure is too low.
PH proximity switch(es) defective or not activated when plate is high.
Hydraulics failure.
- Check that "P1" on Computer corresponds to P1 LED OFF in the Trailer
(and "PH" to PH LED ON).
- Refer to the Manual for adjustment instructions.
- Check that PH activator gap(s) is less than 4 mm (5/32") when the plate is
in it”s locked position.
- Check that the hydraulic valves, the motor and the motor relay are powered
and functioning properly (refer to the Manual).
- Increase the Raise Plate (until PH on) time limit to 20 seconds max.
Error 646: Release Catch Timeout
The time from initiation of the Release Catch mode until activation of the
P1 pressure switch has exceeded a predetermined time limit (2 sec. typ.).
Possible causes:
Pressure switch P1 defective or improperly adjusted.
Hyd. pump excess pressure is too low.
Hydraulics failure.
- Check that "P1" on Computer corresponds to P1 LED OFF in the Trailer
- Refer to the Manual for adjustment instructions.
- Check that the hydraulic valves, the motor and the motor relay are powered
and functioning properly (refer to the Manual).
- Increase the time limit to a maximum of 5 seconds.
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