Maxon MXT-25, Maintenance Manual

Page: 42 / 61

1
1921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
42
VALVE “S1”
LOWERING
SOLENOID VALVE
SOLENOID
SWITCH
MOTOR WILL NOT RUN
TROUBLESHOOTING
4.
Touch heavy jumper cables to terminals
“A”
&
“B” (FIG. 42-1)
.
a. If motor runs, replace the solenoid swich.
b. If motor does not run, repair or replace the pump motor.
1.
Connect voltmeter between solenoid switch terminal
“B”
and
ground wires connection on pump
(FIG. 42-1)
. Verify that full bat-
tery voltage is at
“B
.
”
Recharge the batteries if voltmeter indicates
less than 12.6 volts DC, or 25.2 volts DC for a 24 volt system.
TERMINAL “B”
BATTERY (+)
TERMINAL “A”
LOAD
TERMINAL “C”
GROUND (-)
GROUND (-) WIRE
CONNECTION
TERMINAL “D”
COIL DRIVE (+)
2.
Connect voltmeter between solenoid switch terminal
“D”
and
ground wires connection on pump
(FIG. 42-1)
. Set control switch
to “
UP
.
”
Verify that full battery voltage is at
“D
,
”
if not, replace
the power down module.
VOLTMETER (-)
LEAD)
12 VDC POWER UNIT
(POWER DOWN)
FIG. 42-1
POWER DOWN
MODULE
3.
Touch a jumper wire to terminals
“B”
&
“D” (FIG. 42-1)
. If
motor runs, check control switch, the switch connections, and
white wire. Check and correct wiring connections or replace
the control switch.