Section 3 - Troubleshooting
Troubleshooting the DMR-30 Controller
104045-021 - AB62 Work Platform - European Model
Page 3-3
3-6 T
ROUBLESHOOTING
THE
DMR-30 C
ONTROLLER
Figure 3-1:
DMT-30 Transmitter
There are two components to the
DMR-30 system. A DMT-30 transmit-
ter in the upper control box transmits
inputs from the operator controls to
the DMR-30 receiver in the lower
control box. The DMR-30 receives
the digital signal and commands the
appropriate functions. A correspond-
ing LED for each input and output is
added to the DMR30 -DMT-30 for
easier diagnosis.
These LEDs correspond to wire posi-
tion in the plugs and acknowledge a
signal on the wire. Using the charts
in Figure 3-2 and Figure 3-1, a signal
or series of signals can be followed
from switch to actuator to help in
determining the cause of a problem.
Four “blinking” diagnostic LEDs, located at the bottom-center of the DMR-30, are labeled as to their function
and are also used for diagnostic purposes.
A. CPU LED: DMR-30 is powered up operating properly. Solid light indicates internal failure. Not lit when
no power input.
B. INPUT LED: Indicates an input from lower control panel switches, including ignition switch. This LED
should flash with CPU LED.
C. OUTPUT LED: Indicates an output to boom or drive functions. This LED flashes only when operating
boom or drive functions from either controller.
D. BUSS LED: Indicates an input from the DMT-30 (upper controller). This LED should flash with CPU
LED and INPUT LED as the upper ignition must be on to operate.
Figure 3-2:
DMR-30 Receiver