Service and Repair Manual
October 2019
Control System Fault Codes
122
S
®
-80 XC
™
• S
®
-85 XC
™
•
S
®
-
80 HF • S
®
-85 HF
Part No. 1280490GT
ID Component ID Name
Cause
Effect
Solution
78 Platform
Controller
(PCON)
13 Not
detected
TCON has not
detected the PCON
primary processor
on the
communications
bus.
Controls from the
platform will not
operate.
* Verify PCON is receiving power.
Check for 12 V on J15-2 (+) and J15-1
(-).
* Verify PCON is receiving ESTOP
signals. With ground ESTOP pulled
out and keyswitch set to Platform,
verify 12 V is reaching PCON J15-10.
* Verify CAN bus is functional. Pull out
connector J15 from the PCON and
with a voltmeter set to resistance
verify that pins 3 and 4 on the harness
connector measure between 110 and
130 Ohms. Check wiring and boom
cable for open or short circuits if
resistance check fails.
* Replace PCON if necessary.
29 Software
version
mismatch
PCON software is
out of date.
Machine limited to
recovery functions
Download latest software from
firmware site and update machine.
79 Display
Controller
(DISCON)
13 Not
detected
TCON has not
detected the
DISCON on the
communications
bus.
Controls from the
ground will not
operate.
* Verify DISCON is operating by
checking that the display on the front
is operating properly.
* If there is no display, try to power up
the DISCON by setting the keyswitch
to Ground, pull out the ground ESTOP
and press the Ground Function
Enable button. The display should
start.
* If there is still no display, check
DISCON power on J10 pins 2 (+) and
1 (-).
* If DISCON operates but fault
persists, check the CAN bus wiring.
Disconnect J10 and with a voltmeter
set to resistance verify that the
resistance between pins 3 and 4 on
the harness connector are between
55 and 65 ohms. Check CAN wiring if
resistance check fails.
* Replace DISCON if required.
29 Software
version
mismatch
DISCON software
is out of date.
Machine limited to
recovery functions
Download latest software from
firmware site and update machine.
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