ZF SERIES PRESSURE WASHER
OPERATOR’S MANUAL
13
LANDA ZF
•
REV. 9/02
PROBLEM
POSSIBLE CAUSE
SOLUTION
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
Pump sucking air
Check that hoses and fittings are air tight.
Valves worn or dirty
Check, clean or replace.
Unloader valve seat faulty or worn
Check and replace.
Nozzle incorrect or worn
Check and replace.
Worn piston packing
Check and replace.
Multireg nozzle in low pressure position
Slide out to select high pressure.
FLUCTUATING
PRESSURE
Valves worn, dirty or stuck
Check, clean or replace.
Pump sucking air
Check that hoses and fittings are air tight.
Worn piston packing
Check and replace.
PRESSURE DROPS
AFTER PERIOD OF
NORMAL USE
Nozzle worn
Check and replace.
Valves worn, dirty or stuck
Check, clean or replace.
Unloader valve seat worn or dirty
Check, clean or replace.
Worn piston package
Check and replace.
PUMP NOISY
Pump sucking air
Check that hoses and fittings are air tight.
Valves dirty or worn
Check, clean or replace.
Worn bearings
Check and replace if necessary.
Water too hot
Reduce temperature below 140°.
PRESENCE OF
WATER IN OIL
High humidity in air
Check and change oil twice as often.
Piston packing and oil seal worn
Check and replace.
WATER DRIPPING
FROM UNDER
PUMP
Piston packing worn
Check and replace.
O-rings of piston guide or retainer worn
Check and replace.
OIL DRIPPING
Oil seal worn
Check and replace.
MOTOR DOES NOT
START WHEN
SWITCHED ON
Plug not well connected or there is a
lack of power supply
Check plug, cable and switch.
MOTOR HUMS BUT
DOES NOT RUN
WHEN MACHINE
SWITCHED ON
Main voltage is insufficient, lower than
the minimum required
Check that the main power supply is adequate.
Pump is stuck or frozen
Check by turning the motor manually as described in
instructions (page 8).
Incorrect extension cord
Replace with correct extension cord.
MOTOR STOPS
Tripped thermal overload due to
overheating
Check that main volatage corresponds to the specifications
for the ZF2-10021D. Wait a few minutes then turn on
machine again by resetting the GFCI on the cord.
TROUBLESHOOTING
Summary of Contents for ZF2-10021D
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