Troubles, Causes And Troubleshooting - Frank FH 711 TS Operating Instructions Manual

7.

Troubles, causes and troubleshooting

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 is not
below liquid level
35
What to do about it
Have an expert: check the
fuse of the local installation
and control fuses in the circuit
box of the machine, replace if
necessary; check supply cable,
wall socket and voltage
See also "Excessive pump
pressure"
Check and 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 & clean nozzle; flush
spray lance without the nozzle
mounted
Mount specified nozzle
Delime heating coil (see 6.2)
spray 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
UK