Troubleshooting - Motor Controller - Graco LineDriver ES Series Operation - Repair - Parts

Troubleshooting - Motor Controller

Diagnostics
Diagnostics information can be obtained by observing
the fault codes issued by the Status LEDs. See Table 1
for a summary of LED display formats.
The pair of LEDs built into the controller (one red, one
yellow) produce flash codes displaying all the currently
set faults in a repeating cycle. Each code consists of two
digits. The red LED flashes once to indicate that the first
digit of the code will follow: the yellow LED then flashes
the appropriate number of times for the first digit. The
red LED flashed twice to indicate that the second digit of
the code will follow; the yellow LED flashes the appropri-
ate number of times for the second digit.
Example:
B+ Undervoltage Cutback (code 23) and Stall Detected
(code 73).
The controller's two LEDs will display this repeating pat-
tern:
Code
23 One red, two yellow, two red, three yellow
73 One red, seven yellow, two red, three yellow
The numerical codes used by the yellow LED are listed
in Table 2, page 20, which also lists possible fault
causes and describes the conditions that set and clear
each fault.
NOTE: If there are more than one errors active at one
time, the control will cycle through them and repeat.
3A6623C
Display
Summary of LED Display Formats
The two LEDs have four different display modes, indi-
cating the type of information they are providing.
Table 1
Display
Neither LED illumi- Controller is not powered on, or
nated
Vehicle has dead battery, or
Severe damage
Yellow LED flash- Controller is operating normally
ing
Yellow and red Controller is in Flash program mode
LEDs both on solid
Red LED on solid Internal hardware fault detected by the
Supervisor or Primary microprocessor.
Missing or corrupt software. Interrupting
a software download may cause corrup-
tion of the software. Cycle power switch
to clear. Reload software or replace con-
troller if necessary.
Red LED and yel- Controller has detected a fault. 2-digit
low LED flashing
code flashed by yellow LED identifies
alternately
the specific fault; one or two flashes by
red LED indicate whether first or second
code digit will follow.
Troubleshooting - Motor Controller
Status
19