Landa PDHW5-35624E, Руководство оператора

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18
Maintenance
Troubleshooting
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger supply hose; clean filter at water inlet.
Old, worn or incorrect spray
nozzle Match nozzle number to machine and/or replace with
new nozzle.
Belt slippage Tighten or replace; use correct belt.
Plumbing or hose leak
Check plumbing system for leaks. Re-tape leaks with
teflon tape.
Faulty or mis-adjusted unloader
valve Adjust unloader for proper pressure. Install repair kit
when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet or discharge
valves in pump
Clean inlet and discharge valves.
Worn inlet or discharge valves Replace with valve kit.
Obstruction in spray nozzle Remove obstruction.
Leaking pressure control valve Rebuild or replace as needed.
Slow engine RPM Set engine speed at proper specifications.
Pump sucking air Check water supply and possibility of air seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
BURNER WILL
NOT LIGHT Little or no fuel Fill tank with fuel.
Improper fuel or water in fuel Drain fuel tank and fill with proper fuel.
Clogged fuel line Clean or replace.
Plugged fuel filter Replace as needed.
Mis-adjusted burner air bands Readjust air bands for clean burn.
Little or no fuel pressure from
fuel pump Increase fuel pressure to specification and/or replace
fuel pump. Test with pressure gauge.
Faulty burner transformer
Test transformer for proper arc between contacts.
Replace as needed.
Disconnected or short in elec-
trical wiring All wire contacts should be clean and tight.
No breaks in wire.
Flex coupling slipping on fuel
pump shaft or burner motor shaft
Replace if needed.
On-Off switch defective
Check for electrical current reaching
burner assembly with burner switch on.
(continued on next
page) Heavy sooting on coil and burner
can cause interruption of air flow
and shorting of electrodes
Clean as required.
Landa PDHW Series Operator’s Manual 8.919-980.0 - B