Section 5 • Fault Codes
5 - 4
GR-20J • GR-26J
Part No. 227656
September 2016
FAULT CODE CHART
Error Source
Error Type
ID
Name
ID
Name
Condition
Solution
19
Serial error
#1
The controller has not
responded to the request
from the base board as
expected.
Replace the controller.
32
Logic failure
#1
Under-voltage or over-
voltage has been
detected.
If the fault occurs on starting or
during an alarm, the fault is
most likely to be linked to an
under-voltage. Check whether
the main voltage SI is stable. If
the fault occurs on acceleration
of the motor or activation of the
pump, the fault may be due to
under-voltage. Check the
charge and the battery
connections. If the fault is
detected during braking, the
fault may be due to over-
voltage: Check the battery
voltage during braking. In any
other case, the fault may be due
to an internal fault of the
controller then replace it. Check
whether there is contact or low
impedance between pin A12
and the battery. Otherwise the
circuit is damaged.
33
Eb. Drv.
Shorted
The electric cable of the
brake is in short-circuit.
Check whether there is a short
circuit or low impedance
between pin A10 and the
battery.
34
Driver
shorted
The main conductor of the
driver is short-circuited.
Check whether there is a short
circuit in parallel with the brake
solenoid valve coil. Otherwise
the conductor circuit is damaged
and the controller must be
replaced.
36
Emergency
button wire
Excitation wire on
emergency button is
disconnected.
Repair wire on the emergency
button.
37
Eb. Drv. / coil
fail
The electric circuit of the
break is open.
Replace the controller.
40
Mc enable
short.
The EB coil can not
activate.
Replace the controller.
01
Controller
interface
board
41
Eb. enable
short
The power contactor is
short-circuited.
Check the wiring or change the
controller.
