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© 2022 Staheli West
151
Faults
Fault 217: Fuel Nozzle 1 Pressure Is Low in Low Fire
Indicates that fuel 1 nozzle pressure is 5% lower than pump pressure.
Causes
Troubleshooting
Fixes
• Fuel nozzle 1 & 2 sensor cables
are crossed.
• Swap cables to appropriate sensor.
• Restricted fuel flow through the
fuel solenoid valves.
• Inspect fuel path, check for
overtightened fittings.
• Remove restrictions.
• Loose/Leaking fuel nozzle.
• Remove burner gun and inspect
nozzle.
• Tighten/Replace nozzle.
• Faulty Sensor (Fuel pump or
nozzle 1).
• Swap sensors to identify faulty
sensor.
• Replace faulty sensor.
• Faulty O-ring in fuel gun
assembly.
• Remove gun assembly and
inspect O-ring. See test 22.
• Replace O-ring.
Fault 218: Fuel Nozzle 1 Pressure Is Low in High Fire
Indicates that fuel 1 nozzle pressure is 5% lower than pump pressure.
Causes
Troubleshooting
Fixes
• Restricted fuel flow through the
fuel solenoid valves.
• Inspect fuel path, check for
overtightened fittings.
• Remove restrictions.
• Loose/Leaking fuel nozzle.
• Remove burner gun and inspect
nozzle.
• Tighten/Replace nozzle.
• Faulty sensor (Fuel pump or
nozzle 1).
• Swap sensors to identify faulty
sensor.
• Replace faulty sensor.
Fault 219: Fuel Nozzle 2 Pressure Is Low in High Fire
Indicates that fuel 2 nozzle pressure is 10% lower than pump pressure.
Causes
Troubleshooting
Fixes
• Restricted fuel flow through the
fuel solenoid valves.
• Inspect fuel path, check for
overtightened fittings.
• Remove restrictions.
• Loose/Leaking fuel nozzle.
• Remove burner gun and inspect
nozzle.
• Tighten/Replace nozzle.
• Faulty sensor (Fuel pump or
nozzle 2).
• Swap sensors to identify faulty
sensor.
• Replace faulty sensor.
• Clogged burner fuel filter.
• Replace burner fuel filter.
• Restricted fuel flow through the
fuel manifold.
• Remove each hose from the
fuel manifold and check for
appropriate flow.
• Remove restrictions.
• Faulty CR-3 relay.
• Swap with spare 120 V relay.