Skyjack SJ12 E Service Manual page 134

Section 5 – Procedures
Code Description
175-M2 ERR SPEED FB.ERR. XY
177-BRK1 ERR COIL SHOR. EB.
MOTOR TEMP .
178-M2 TEMP
STOP
180-M2 ERR OVERLOAD
181-M2 ERR WRONG ENC SET
241914ACA
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Cause
An issue with the speed or position
feedback sensor is detected. The
hexadecimal value "XY" helps to identify
the nature of the problem: the first digit
"X" encodes the type of feedback sensor,
the second digit "Y"encodes the type of
issue.
X (sensor): 0 Encoder, 1 Sin/cos, 3
Encoder + index, 5 Resolver, 6 3- all, 7
PWM
Y (issue): 1 Generic error 1, 2 Generic
error 2, 3 Generic error 3, 4 Generic
error 4, 5 Signals off, 6 Swapped signals,
7 Shorted signals or one is absent, 8
Signal amplitude, 9 Signal amplitude
(supervisor µC).
A too large speed step, B SSL
(sensorless speed loop), C Signals are
filtered out, D-F Free.
This alarms occur when there is an
overload on the MC driver (pin A27) or
on the right EB driver (pin A28). As soon
as the overload condition disappears,
the alarm will be removed automatically
by releasing and then enabling a travel
demand.
The motor temperature has reached or
exceeded the value set by the parameter
MOTOR TEMP STOP .
The motor current has exceeded the limit
fixed by hardware.
Mismatch between parameters
ENCODER PULSES 1 and ENCODER
PULSES 2 (master section) or between S
ENC. PULSES 1 and S ENC. PULSES 2
(slave section).
Display Module
Troubleshooting
Check the motor harness and motor
to see if the speed feedback sensor
may be faulty. If so, replace the
controller.
The typical root cause is in the brake
wiring harness or in the load coil.
Check the MOTOR TEMPERATURE
reading by the TESTER function.
If the sensed temperature is real,
consider to improve the cooling of
the motor or to increase the MOTOR
TEMP STOP setting.
If the warning is present when the
motor is cool, check the sensor
ohmic value and the sensor wiring.
If no issue is found at the sensor
level, it is necessary to replace the
controller.
Restart the machine. If the code is
still present without driving, replace
the controller.
Check the motor harness and motor
to see if the speed feedback sensor
may be faulty. If so, replace the
controller.
SJ12 E, SJ16 E, SJ20 E