
© 2021 Staheli West
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Faults
Fault 1219: Boiler Controller 5 V “Sensor” Supply Too Low
Triggers when voltage is under 4.5 V
Check tractor battery. If problem persists: contact dealer / replace controller.
Fault 1220: Boiler Controller 5 V “Sensor” Supply Too High
Triggers when voltage is over 5.5 V
Check tractor battery. If problem persists: contact dealer / replace controller.
Fault 1221: Flue Temp Sensor Not Connected
Indicates ≥0.5 volts is not present on the signal wire.
Causes
Troubleshooting
Fixes
• Sensor disconnected.
• Connect sensor.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Repair/Replace wiring.
• Faulty sensor.
• Replace sensor.
Fault 1222: Flue Temp Sensor Voltage High
Indicates >4.5 volts is present on the signal wire.
Causes
Troubleshooting
Fixes
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Repair/Replace wiring.
• Faulty sensor.
• Replace sensor.
Fault 1223: Flue Temp is High Alarm (600F)
Fault 1224: Flue Temp is High Warning (550F)
Rising flue temperatures indicate the boiler is operating less efficiently than normal.
Causes
Troubleshooting
Fixes
• Soot has built up on tubes
causing high flue temperatures.
• Clean flue tubes (See Maintenance Section).
• Faulty flue temp sensor.
• Confirm with an infrared gun
that the actual temperature is
not what is shown as the flue
temp reading on the touch
screen.
• Replace flue temp sensor.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Repair/Replace wiring.
• Scale has built up in the boiler.
• Remove a hand-hole cover and
inspect boiler tubes for scale.
• Use REDEW boiler de-scaler
(Part # 11194).
• Use water treatment chemical
(preventative).
Summary of Contents for DewPoint 331
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