Tokheim TQP-HS - Overflow Valve Malfunction Diagnosis

Document Ref 942005-001 Rev 2 Page 3-7
Component Technical Manual TQP-HS for Fuel Dispensers
3.2.4 CLOSING OF THE OVERFLOW VALVE
YES
NO
YES
Install anti-syphon valve
or spring on foot-valve
Consult Hydraulic Dept.
NO
CLOSING OF THE
OVERFLOW VALVE
Station tank
above pump level
or suction height
<1m
Float mechanism
dysfunctional?
Replace float
Level sensors in
ground tank are
not working when
tank is filled