Landa EHW4-2000C Operator's Manual page 14

PROBLEM
OIL SQUIRTS OUT
OF OIL CAP ON PUMP
WATER DRIPPING
FROM UNDER PUMP
OIL DRIPPING
EXCESSIVE VIBRATION
IN DELIVERY LINE
SYSTEM WILL
NOT START
SYSTEM WILL
NOT STOP
SYSTEM STOPS AFTER
APPROXIMATELY
10 SECONDS AND
THEN RESTARTS
WATER IS
NOT HOT
MOTOR "HUMS" BUT
DOES NOT TURN
PUMP RUNNING
NORMALLY BUT LOW
WATER PRESURE
14
TROUBLESHOOTING
POSSIBLE CAUSE
Pump overfilled with oil
Piston packing worn
O-Ring plunger retainer worn
Cracked piston
Oil seal worn
Irregular functioning of the valves
Power, water, auto switch not on
Motor overload tripped
Control fuse blown (2 or 3 amp)
Pressure switch faulty
Timer faulty
Water leak in discharge line
Pressure switch faulty
Timer resistor faulty
Faulty pressure switch
Leak in system
Tank water low
Temperature or level controls faulty
Electric motor single phasing
Air leak in inlet
Faulty pressure unloader
8.941-114.0 • LANDA EHW • Rev. 08/12
SOLUTION
Maintain oil level at red dot on sight glass
at rear of pump or at top of notch on
dipstick (where applicable).
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and turn on.
Check and reset.
Check and replace.
Check, clean or replace.
Check and replace.
Repair water leak.
Disconnect at timer. If unit stops,
replace pressure switch.
Replace timer.
Check and replace.
Fix leak.
Check for leaks and fill.
Check and replace.
Check for blown fuse or loose power
line connections.
Check water supply and possibility
of air entering water connections.
Bypass pressure unloader by wiring spray
gun open. If good PSI, turn machine off
and replace regulator. DO NOT
RELEASE SPRAY GUN WHILE
BY PASSING UNLOADER.