Frank FH 711 DMP Operating Instructions Manual page 34

Trouble
Machine is not running
or switches off during
operation
Pump fails to reach
prescribed pressure
Excessive pump
pressure
With the spray gun
closed, the machine
permanently switches
on and off
No flow of chemicals
Possible cause
No current; low voltage
Excessive pump pressure, mo-
tor protection switch cuts out.
Leakage in suction hose or in
chemical suction hose
Pump seals leaking
Nozzle worn
Wrong nozzle
Dirty water filter within water
inlet tank
Nozzle blocked
Wrong spray nozzle
Heating coil blocked with lime
Leakage in the pressure system Check pipes, hoses, fittings,
Chemical filter on suction hose
blocked
Dosing valve blocked
Chemical tank empty or filter
basket on suction hose ist not
below liquid level
What to do about it
Have an expert ; check the
fuse of the local installation
an control fuses in the sircuit
box of the machine, replace if
necessary;check supply cable,
wall socket an voltage
See also "Excessive pump
pressure"
Check an retighten screw
connections, replace sealings
if necessary;tighten hose
clips;check dosing valve for
leaks, replace if necessary
Have an expert check pump
seals and plungers for wear
conditions and replace if ne-
cessary
Mount new nozzle
Mount specified nozzle
Clean filter
Remove an clean nozzle;flush
spray lance without the nozzle
monted
Mount specified nozzle
Delime heating coil (see 6.2)
spary gun,heating coil for
leaks;fix seals on leaking parts
or have them replaced by an
expert
Clean filter
Clean dosing valve
Refill chemicals, lower filter
basket
34