Servend STH14, Technician'S Handbook

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128 Part Number STH14 5/09
Pump motor starts
and stops, short
cycles, as soon as
water level drops
below Red (High)
probe
Black (Low) Lead
wire is open or
disconnected
Verify connections and
continuity of black wire from
Liquid Level Control Board to
Probes on Carb Tank.
Pump motor starts
and stops, short
cycles, as soon as
water level drops
below Black (Low)
probe
Red and Black
Leads are switched
with each other
Verify Red Lead is going to Red
probe and Black Lead is going
to Black probe.
Pump short cycles
from below high
probe to just above
high probe - Low
probe has no effect
Red and Green
Leads are switched
with each other
Verify Red Lead is going to Red
Probe and Green Lead is going
to Ground Screw on tank
Black and Green
Leads are switched
with each other
Verify Black Lead is going to
Black Probe and Green Lead is
going to Ground Screw on tank.
Problem Possible Cause Correction
STH14.book Page 128 Monday, May 4, 2009 1:48 PM