AF9ZP0BA - EPS-ACW REACH TRUCK - User Manual Page - 65/90
5Hz longer than a time delay of 500msec (changing vs. truck
speed), this alarm occurs. Monitoring is suspended 400ms long
every time the sign of the error (freq_req_freq_enc.) changes
from pos to neg or viceversa.
- Remedy: This alarm can be due to:
1. At least one encoder channel broken
2. Too much friction in the transmission/gears
3. A failure in the power controller
4. A failure in the motor (e.g. an encoder locked or a motor
phase broken).
2) MOTOR LOCKED
Alarm 0xFFDC=220 Group #0 [M,S]:
- Cause: This alarm occurs when the current in the motor stays higher
than 90% Imax longer than 1 secs when the traction speed is
higher than 15% (delay becomes 5 secs when the traction
speed is lower than 5%).
- Remedy: Too much torque required to steer or problem in the encoder
(launch selfcheck #2).
3) HIGH CURRENT
Alarm 0xFF46=70 Group #0 [M,S]:
- Cause: This alarm occurs at key on, in case the circuit for limiting the
max current via Hardware is always active (can be due to a
failure of a current amplifier).
- Remedy: If it is repetitive, it is necessary to replace the controller
4) POWER FAILURE #1
Alarm 0xFF49=73 Group #2 [M,S]:
- Cause: This alarm is raised by the MuC when the current in phase U of
the motor lower than 5.4Arms 100msec long even if it is
commanded higher than 28% Imax.
This alarm is raised by the SuC in case the I2t of the current in
the battery overtakes the admitted limit of 22000A
2
s (i.e.
overload protection of the battery connections).
- Remedy: MuC: if it is repetitive, check if the battery is connected to the
controller. Otherwise the problem can be a failure in the power
three phase bridge or in terminal U motor connection.
SuC: an overload is occurred in the steering controller. One
possibility is too much friction in the transmission. Launch
selfcheck #2 with the steered wheel lifted up (and then on the
floor) to measure the current in the motor when turning the
steered axle. Check the diagnostic response (STATUS#2 and
alarm message).
5) POWER FAILURE #2
Alarm 0xFF48=72 Group #2 [M]:
- Cause: Current in phase V of the motor lower than 5.4Arms 100msec
long even if it is commanded higher than 28% Imax.
- Remedy: If it is repetitive, check if the battery is connected to the
controller. Otherwise the problem can be a failure in the power
three phase bridge or in terminal V motor connection.
6) POWER FAILURE #3
Alarm 0xFF47=71 Group #2 [M]:
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