Landa MVC3-30321, Operator'S Manual

Page: 21 / 25

MVC SERIES PRESSURE WASHER
OPERATOR’S MANUAL
21
LANDA MVC • #96-61836 • REV. 5/03
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Water supply is insufficient Use larger supply hose; clean filter at water
inlet.
Spray nozzle is old, worn or incorrect Match the nozzle number to the machine
and/or replace with new nozzle.
Belt slips Tighten or replace belt; use correct belt.
Plumbing or hose is leaking Check plumbing system for leaks. Retape
leaks with teflon tape.
Unloader is faulty or misadjusted Adjust unloader for proper pressure. Install
repair kit when necessary or replace.
Packing in pump is worn Install new packing kit.
Discharge valve in pump or inlet is
fouled or dirty
Check inlet and discharge valve.
Discharge valve or inlet is worn Replace with valve kit.
Spray nozzle has obstruction Remove obstruction.
Steam pressure control valve is
leaking (where applicable) Rebuild or replace as necessary.
Engine RPM is slow Set engine speed at proper specifications. See
serial plate.
BURNER WILL NOT
LIGHT
There is little or no fuel Fill tank with fuel.
Improper fuel or water in fuel Drain fuel tank and fill with proper fuel.
Fuel line is clogged Clean or replace fuel line.
Fuel filter is plugged Replace fuel filter as needed.
Burner air bands are misadjusted Readjust air bands for clean burn.
Little or no fuel pressure from fuel
pump Increase fuel pressure to specification and/or
replace fuel pump.
Burner transformer is faulty Test transformer for proper arc between
contacts. Replace as needed.
Electrical wiring is disconnected or
has short in it All wire contacts should be clean and tight
with no breaks in wire.
Flex coupling is slipping on fuel pump
shaft or burner motor shaft
Replace if needed.
ON-OFF switch is defective Check for electrical current reaching burner
assembly with burner switch on. Replace switch
if needed.
Heavy sooting on coil and burner can
cause interruption of air flow and
shorting of electrodes
Clean as required.
Electrode setting is improper Check and reset according to diagram in
manual.
30 amp circuit breaker tripped Push in reset button.
Bridge rectifier defective Test and replace.
12V DC relay defective Test and replace.
Fuel is not reaching combustion
chamber
Check fuel pump for proper flow. Check
solenoid flow switch on machines with spray
gun control for proper on-off flow control.