4-19
D
Replace filter
motor.
YES
NO
Check switch and
replace if
defective.
Is 115
VAC present at
the filter motor when
the filter switch
is ON?
NO
Replace the
switch.
Is there
continuity across
pump/heater switch when
in ON
position?
NO
YES
YES
Reset the circuit
breaker and check
for a clogged filter
hose.
Is the
building circuit
breaker
open?
C
NO
NO
Is the filter
correctly connected to
the filter piping?
Check the filter lines for
clogs.
YES
Ensure that teh filter hose is
correctly connected to the filter unit
and the correct valves are open
NOYES
Does the filter
motor trip the
overload?
Check the filter lines for
clogs.
YES
Ensure that the filter hose is
correctly connected to the filter unit
and the correct valves are open
NOYES
Is the filter
correctly connected to
the filter piping?
Use a VOM to measure the
resistance at the filter power cord
plug. If the resistance is higher
than 37.5 ohms, a heater has failed
and must be replaced.
NO
Does the filter
circuit breaker keep
tripping?
A
Allow 1/2 hour for the
filter heaters to
soften hardened
shortening.
Have you allowed
enough time for the heaters
to warm-up?
YES
B