Hotsy HWE-4020C, Operator'S Manual

Page: 21 / 52

21
Maintenance
Troubleshooting
PROBLEM POSSIBLE CAUSE SOLUTION
WATER ESCAPING
FROM FILL
PIPE ON HEAT
EXCHANGER
Cold water added to
heat exchanger
Will stop once at operating temperature.
Ruptured coil or leaking Check, repair or replace fittings.
UNLOADER
DOES NOT
GO INTO BYPASS
OR WILL
CYCLE ITSELF
Spray gun or hose is leaking
to atmosphere
Check and repair all leaks.
Check plunger either did
not move or did not seal
Remove discharge port. Clean and inspect
the check plunger. Replace the O-ring
if needed.
Actuator O-ring failure
Remove actuator plunger assembly and
inspect O-ring and back-up rings. Replace
if necessary.
SPIKES
TOO HIGH
Slow moving actuator; this may
be caused by bad O-rings either
on the plunger or inside the
actuator fitting.
Remove the actuator assembly to inspect the
O-ring and back-up rings. The actuator
assembly will have to be disassembled to
inspect and/or replace the O-rings in the
actuator fitting.
Spring tension
Adjustment should stop when pressure is no
longer affected by further compression of the
spring.
Hose length
Hose length can affect the amount of spike
pressure. Long lengths of hose may cause
high spike pressures.
SYSTEM
WON’T COME
UP TO
PRESSURE
Water is leaking between ball
and seat
Disassemble inlet fitting and check for
contaminates or worn parts. Clean or
replace as needed.
O-Rings on actuator plunger
are bad
Remove actuator assembly and inspect
O-ring and back-up rings. Replace if
necessary.
Locknut may be improperly set
Readjust locknut.
NOTE: The locknut is inside the spring on
models that have the stem exposed above
the spring.
Tip/GPM combination is
incorrect
Check actual GPM on unrestricted pump and
size tip accordingly.
Tip worn- the GPM may be
greater than expected with a
worn tip
Replace tip.
Bad gauge - the pressure may
be higher than the gauge shows
Replace gauge.
Hotsy HWE Operator’s Manual 8.941-225.0 - Y