7 – 26 Repair Manual RRE140/160/180/200/250 © BT
Troubleshooting
Warning and error codes
T-code Valid from serial number Date Publication No.
815, 816 6051502 2008-08-21 261828-040
Group 4 Hydraulic system
4:180 Height sensor error No pulses from the main lift height sensor on lift/lowering.
Disabled lift function 1. Check the main lift height sensor, the electrical supply
and wiring harness.
2. Recalibrate valve Q4 and Q5.
3. The fork load may be too heavy on lifting.
4:181 Height sensor value invalid The current height value for main lift does not correspond to
the signal from the height reference sensor on lowering.
Disabled lift function Check the lift reference sensor, the main lift height sensor,
the electrical supply and wiring harness.
4:182 Height sensor error No pulses from the free lift height sensor on lift/lowering.
Disabled lift function Check the height sensor, the electrical supply and wiring
harness.
The fork load may be too heavy on lifting.
4:183 Height sensor value invalid The current height value for free lift does not match the sig-
nal from the height reference sensor on lowering.
4:184 Abnormal lift/lowering
speed
The fork speed is too high.
Lift and lowering disabled This error should not occur during normal operation. Check
both height sensors if lift/lowering speed is working nor
-
mally.
4:185 Height sensor error The height reference signal for free lift is absent when its
presence would be expected. The free lift height sensor
value indicates that the height reference sensor should
have changed.
Lift/lowering speed reduced Check the reference sensor and fork height as displayed
against the actual fork height.
4:186 Height sensor error The height reference signal for main lift is absent when its
presence would be expected. The free main lift height sen
-
sor value indicates that the height reference sensor should
have changed.
Lift/lowering speed reduced Check the reference sensor and fork height as displayed
against the actual fork height.
4:187 Abnormal lift height The calculated lift height is lower than –150 mm, or 50 mm
higher than the maximum fork height according to parame
-
ter 1010.
Lift/lowering speed reduced Activate the reference sensors by lifting and lowering the
forks. If the error remains, check all height-related parame
-
ters.
Code Name Description/possible causes
Event Action
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