© 2022 Staheli West
174
Faults
Fault 300: Low Water 1 or 2 Tripped (Page 2 of 3)
Indicates boiler water level is too low for safe operation.
Verify that the boiler water sight glass matches the boiler water level on the touch screen.
Causes
Troubleshooting
Fixes
• Ultra concentrated water
causing foaming.
• When steam is turned off water
level drops below LWCO probes.
This commonly happens when
turning at the end of a windrow.
Water in the boiler will foam
when it is above 3500 ppm.
• See fault 312 for all causes and
fixes.
• Faulty signal from PLC to LWCO
1 or 2 reset relay (Panel 1).
• Reset relays are engaged when
they shouldn’t be.
• Replace relay.
• Reprogram PLC.
• Replace PLC.
Feed Pump Not Running (F
ault 310)
• Pump contactor overload is
tripped.
• Inspect feed pump contactor;
if yellow stripe is present in test
window, reset is required.
• Reset pump contactor overload
(Panel 2) (See Fault 237).
• Circuit breaker is tripped.
• Check circuit breaker (Panel 1).
• Reset circulation pump
circuit
breaker (Panel 1).
• Yellow weatherproof 240 V
plug loose/disconnected.
• Inspect yellow weatherproof
plug to see if it is loose or has a
bad connection.
• Reconnect yellow weatherproof
plug behind the burner that gives
240 V to the pump.
• Loose wires inside pump
housing.
• Inspect wire nuts and ensure
that 240 V is reaching the pump.
• Secure wire nuts inside pump
housing.
• Faulty/Seized pump.
• Manually attempt to spin motor
(motor should spin freely).
• Replace pump.
• Water system not enabled
on touch screen.
• Feed pump should be running
anytime water system is enabled.
• Enable water system in Menu >
Operations > System Start.
• Faulty relay between PLC
and motor contactor.
• Check relay to see if light is on
(Panel 2 relay block 2nd relay).
• Replace relay.
• PLC output not sending
signal.
• Check for 24 V on PLC output
“Y4”. Menu > Diagnostics >
Inputs/Outputs > Discrete
Outputs > Y4.
• Replace PLC.
• Faulty lwco safety relay SR-3.
• Swap with spare 24 V relay.
• Replace lwco 24 V relay.
• Faulty low water cutoff relay.
• Swap suspected faulty low
water cutoff relay with the other
low water cutoff relay to see if
the fault changes, indicating a
faulty relay.
• Replace low water cutoff relay.
• Loose low water cutoff relay
base screw terminals.
• Tighten screw terminals behind the low water cutoff relay.
