LANDA MHP • 8.913-925.0 • Rev. 8/13
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
14
TROUbleSHOOTINg
PRObleM
POSSIble CaUSe
SOlUTION
PUMP
NOISy
Air in suction line
Check water supply and connections on
suction line.
Broken or weak inlet or discharge valve
springs
Check and replace if necessary.
Excessive matter in valves.
Check and clean if necessary.
Worn bearings
Check and replace if necessary.
PReSeNCe
Of WaTeR
IN OIl
Oil seal worn
Check and replace if necessary.
High humidity in air
Check and change oil twice as often.
WaTeR
DRIPPINg
fROM UNDeR
PUMP
Piston packing worn
Check and replace if necessary.
O-Ring plunger retainer worn.
Check and replace if necessary.
Cracked piston
Check and replace if necessary.
Pump protector
Lower water supply pressure. Do not run
with spray gun closed longer than 5 minutes.
OIl
DRIPPINg
Oil seal worn
Check and replace if necessary.
exCeSSIVe
VIbRaTION IN
DelIVeRy lINe
Irregular functioning of valves
Check and replace if necessary.
bURNeR
MOTOR WIll
NOT RUN
Fuel pump seized
Replace fuel pump.
Burner fan loose or misaligned
Position correctly, tighten set screw.
Defective control switch
Replace switch.
Loose wire
Check and replace or tighten wiring.
Defective burner motor
Replace motor
RelIef ValVe
leakS WaTeR
Relief valve defective
Replace or repair.