© 2022 Staheli West
190
Faults
Fault 319: Boiler Building Pressure During Fill Stage
Causes
Troubleshooting
Fixes
• Faulty steam purge actuator.
• Test in “Manual Mode” to see if
the steam purge actuator opens
Menu > Operations >
Manual
Mode.
• Replace steam purge actuator.
• Faulty boiler water level sensor.
• See Test 10.
• Replace boiler water level
sensor.
• Filling in “Keep Hot” mode.
• “Keep Hot” mode keeps the
actuators on the boiler from
opening to relieve pressure.
• Fill the boiler with “Start Fill”.
Fault 320: PLC NAK Error
Causes
Troubleshooting
Fixes
• Faulty/Corrupted PLC
programming.
• Reload PLC program.
• Faulty PLC.
• Replace PLC.
Fault 321: Blown Valve Actuator Fuses Panel 2: F1-F7 (5 amp)
Causes
Troubleshooting
Fixes
• Faulty actuator.
• Verify faulty actuator by
swapping connection with other
actuator.
• Test for ground short.
• Replace actuator.
• Seized valve.
• Remove actuator and test valve
for tightness. Normal valves
should be stiff but movable.
• Replace/Repair valve.
• Faulty wiring.
• Inspect entire wiring path
checking for continuity, ground,
and proper voltage.
• Repair/Replace faulty wiring
section.
Fault 322: Blown Louver Actuator Fuse Panel 2: F8 (5 amp)
Causes
Troubleshooting
Fixes
• Faulty louver actuator.
• Swap with working actuator.
• Test for ground short.
• Replace actuator.
• Faulty wiring.
• Inspect entire wiring path
checking for continuity, ground,
and proper voltage.
• Repair/Replace faulty wiring
section.