JEM AF-2 Service Manual page 25

PUMP PROBLEMS
NO
Is power getting to the pump?
(set to full power and check 240V / 110V)
See PCB PROBLEMS
YES
NO
Does piston seem to
be moving?
PUMP SEIZED - REPLACE
YES
PUMP BLOCKED - REPLACE
NO
Is fluid travelling
through pump?
YES
Fault may be in fluid line / heater