Motor Control Board, Motor control board removal

Motor Control Board

WARNING

To reduce the risk of serious injury, when instructed to relieve pressure, follow the Pressure Relief Procedure on page 8.

2.Remove screws (25, 26) and lower heat sink (22) and motor control board (22a). See Fig. 21.

3.Disconnect wires (C), (D), (96), (E) and 108 from motor control board (22a). See Fig. 13.

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:

SBe 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.

SRoute all wires carefully to avoid interference with the motor control board or junction box.

2.Remove screws (25, 26) and lower heat sink (22) and motor control board (22a). See Fig. 21.

3.Turn ON/OFF switch ON.

4.Observe LED operation and reference following table:

LED	SPRAYER OPERATION	INDICATES	WHAT TO DO
BLINKS

Once	Sprayer runs	Normal operation	Do nothing

Twice	Sprayer runs	Normal operation	Do nothing

Twice	Sprayer shuts down and LED continues	Line voltage is too	Lower line voltage to 120 VAC
repeatedly	to blink twice repeatedly	high

Three times	Sprayer shuts down and LED continues	Pressure transducer	Replace pressure transducer
repeatedly	to blink three times repeatedly	is faulty or missing

Four times	Sprayer shuts down and LED continues	Run away pressure.	Replace motor control board.
repeatedly	to blink four times repeatedly	Pressure greater than	See preceding Motor control
		4500 psi.	board removal procedure.

Five times	Sprayer shuts down and LED continues	Locked rotor. Motor	Clear obstruction and replace
repeatedly	to blink five times repeatedly	can not turn because	broken parts preventing motor
		of some mechanical	from turning
		condition.

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