E29: Brush Wear; Communication Diagnostic Codes; E30: Momentary Loss Of Communication; E99: Loss Of Communication - Graco REACTOR E-20 Repair Manual

E29: Brush Wear

CAUTION
Prolonged operation of motor after a brush wear
warning may result in failure of motor and motor con-
trol board.
1. Check for normal brush wear, which causes the
brush sensor to come in contact with the motor
commutator. Replace the brushes, page 30.
2. Check spade plug. The spade plug inside the motor
housing may be twisted and contacting the commu-
tator side of the brush sensor assembly, causing a
false alarm. Follow the orange wire coming from J7
(E-20/E-XP1), or J6 (E-30/E-XP2), up to the spade
connector on the motor. Using a flashlight, ensure
the spade plug assembly is not making contact with
the metal housing of the brush assembly.

Communication Diagnostic Codes

E30: Momentary loss of
communication
Communications between the display and the motor
control board or the temperature control board have
been momentarily lost. Normally, when communication
is lost, the corresponding display will show E99. The
corresponding control board will register E30 (The red
LED will flash 30 times). If communications are recon-
nected, the display can show the E30 for a small time
(no more than about two seconds). It should not be pos-
sible for E30 to be shown continuously, unless there is a
loose connection causing the display and the board to
continuously loose and regain communication.
Check all wiring between the display and the corre-
sponding control board.
309574L
Communication Diagnostic Codes
3. Check wiring. The yellow brush sensor wire coming
out of the brush may be routed online with the com-
mutator wiring (thick red wire), causing a false
alarm. Reroute the yellow wire coming out of the
brush, away from the commutator wiring.
4. Check motor control board.
• Remove the plug in J7 (E-20/E-XP1), or J6
(E-30/E-XP2). (This will cause an E27 alarm).
• To remove the E27 alarm, use a jumper wire on the
motor control board, across the two pins that the
two yellow wires plug into. Then turn the unit on.
• The E27 as well as the E29 alarm should be gone. If
the E27 alarm is not gone double-check your
jumper.
• If the jumper is installed correctly and the E29 alarm
is still there, replace the motor control board, page
34.

E99: Loss of communication

Communications between the display and the motor
control board or the temperature control board has been
lost. When communication is lost, the corresponding
display will show E99.
1. Check all wiring between the display and the corre-
sponding control board. Pay close attention to the
wire crimping on plug J13 for each board.
WARNING
Read warnings, page 6. Step 2 measures line voltage
and should be done by a qualified electrician. If work is
not performed properly it may cause electric shock or
other serious injury.
2. Measure the incoming voltage to the board (it
should be ~ 230Vac).
3. If it was only receiving 1 leg of the 230Vac the board
may light up, and still not function properly. Correct
the incoming voltage problem.
19