309067
13
Pressure Control Repair
Motor control board removal
1.
Relieve pressure
;
page 3.
2.
Remove screws (25, 26) and lower heat sink (22)
and motor control board (22a). See Fig. 12.
3.
Disconnect wires (C), (D), (96), (E) and 108 from
motor control board (22a). See Fig. 4.
4.
Disconnect potentiometer (77) and transducer (67)
from motor control board (22a).
5.
Remove four screws and motor control board
(22a).
6.
Install new motor control board (22a) with four
screws. Reconnect all wires and secure heat sink
(22) to junction box (20).
CAUTION
To reduce the risk of a malfunction:
Be sure the flat blade of the insulated male
connector is centered in the wrap–around blade of
the female connector when the connections are
made.
Route all wires carefully to avoid interference with
the motor control board or junction box.
Motor control board diagnostics
1.
Relieve pressure
;
page 3.
2.
Remove screws (25, 26) and lower heat sink (22)
and motor control board (22a). See Fig. 12.
3.
Turn ON/OFF switch ON.
4.
Observe LED operation and reference following
table:
LED
BLINKS
SPRAYER OPERATION
INDICATES
WHAT TO DO
Once
Sprayer runs
Normal operation
Do nothing
Twice
Sprayer runs
Normal operation
Do nothing
Two times
repeatedly
Sprayer shuts down and LED continues
to blink two times repeatedly
Run away pressure.
Pressure greater than
4500 psi.
Replace motor control board.
See preceding Motor control
board removal procedure.
Three times
repeatedly
Sprayer shuts down and LED continues
to blink three times repeatedly
Pressure transducer
is faulty or missing
Replace pressure transducer
Four times
repeatedly
Sprayer shuts down and LED continues
to blink four times repeatedly
Line voltage is too
high
Lower line voltage to 230 VAC
for 232918, 232915, 232914;
to 120 VAC for 232910 –
232913, 232919; and to 100
VAC for 232916, 232917
Five times
repeatedly
Sprayer shuts down and LED continues
to blink five times repeatedly
Locked rotor. Motor
can not turn because
of some mechanical
condition.
Clear obstruction and replace
broken parts preventing motor
from turning
