Multiquip LS400/LS500 Pump Troubleshooting Electrical, Electrical Troubleshooting, Malfunction

LS400/LS500 PUMP — TROUBLESHOOTING (ELECTRICAL)

Refer to Figure 61 for the location of components for troubleshooting.

TABLE 12. ELECTRICAL TROUBLESHOOTING

MALFUNCTION
READING	PROBABLE CAUSE	SOLUTION
(Screen 1)
	Burnt 12 V cycling solenoid.	Measure solenoid coil resistance. It should
MAIN A OPEN		read 6 ohms. Replace burnt solenoid.
	Wire connection broken.	Replace broken wire.
	The 12-volt cycling solenoid is shorted directly to	Measure solenoid coil resistance. It should
MAIN A SHORTED	ground.	read 6 ohms. Replace shorted solenoid.
	Wire connection is shorted directly to the ground.	Correct connection.
	Burnt 12 V cycling solenoid.	Measure solenoid coil resistance. It should
		read 6 ohms. Replace burnt solenoid.
MAIN B OPEN
	Wire connection broken.	Replace broken wire.
	The 12-volt cycling solenoid is shorted directly to	Measure solenoid coil resistance. It should
	ground.	read 6 ohms. Replace shorted solenoid.
MAIN B SHORTED
	Wire connection is shorted directly to the ground.	Correct connection.
	Burnt 12 V cycling solenoid.	Measure solenoid coil resistance. It should
		read 6 ohms. Replace burnt solenoid.
SWING OPEN
	Wire connection broken.	Replace broken wire.
	The 12-volt cycling solenoid is shorted directly to	Measure solenoid coil resistance. It should
	ground.	read 6 ohms. Replace shorted solenoid.
SWING SHORTED
	Wire connection is shorted directly to the ground.	Correct connection.

MAYCO LS400/LS500 PUMP — OPERATION AND PARTS MANUAL — REV. #6 (09/19/11) — PAGE 67