Camus Hydronics ADVANTUS AVH 500, Installation, Operation And Service Manual

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65
PART 9 TROUBLESHOOTING
COMPONENT FAILURE MODE ANALYSIS
Incoming Power
• Two wires interchanged
• No effect on safety
• Live and Neutral wires are interchanged.
Transformer
Tripped
• The 24 Volts and 120 Volts wired
are interchanged
• Alert: 49
• Lockout: 53
• Breaker on transformer trips
Relief Valve
• System pressure exceeds relief
valve setting
• Replace the standard relief valve with a higher rated valve up to the
maximum pressure of the heat exchanger.
• Improperly sized expansion tank.
Flow Switch
•
Flow Switch contacts are open
• Alert: 63, 275-281, 460
• LCI OFF
• Verify that pump is operating
• Verify for closed valves or obstructions in boiler piping
• Verify that all air has been purged from the system
• Verify that wiring is correct
Water Pressure
Switch
• Pressure Switch contacts are open
• Alert: 63, 275-281, 460
• LCI OFF
• Verify that minimum water pressure exceeds 30 PSI
• Verify that pump is operating
• Verify for closed valves or obstructions in boiler piping
• Verify that all air has been purged from the system
• Verify that wiring is correct
Flame Failure
• The boiler has failed to ignite the
burner
• Alert: 110, 291-294
• To reset the module, refer to section 5.9
• Verify that all air has been purged from gas line
• Inspect
Hot Surface Igniter and related wiring for damage and
connection errors
• AV500-2500: Verify igniter is glowing
• AV3000-4000: Verify pilot is lit
• Inspect
UV Scanner and associated wiring. Replace if necessary
• Remove the detector and clean the viewing window with a soft, clean
cloth
• Clean the inside of the sight pipe before re-installing the detector
• Verify that boiler is properly grounded
• Verify incoming gas supply pressure and that it coincides with Table 7.
• Verify that the vent/ air inlet piping (if equipped) are correctly installed
and obstructions are not present.
• Verify 24 VAC is being supplied to the
Low-End Gas Valve relay from
the Advantus Controller during ignition. Check wiring from Advantus
Controller and Gas Valve Relay. If a signal cannot be detected, the
Advantus Controller needs to be replaced
• If 24 VAC is present, check the outlet of the valve to ensure that gas is
flowing. When the valve is energized a change in pressure should
occur, if no change is detected the gas valve has failed to open or it is
passing insufficient amount of gas. If this is an initial startup increase
the low fire gas setting by ¼ turn clockwise.
• Inspect the burner. Refer to Burner Maintenance in section 10.5
• Replace the
Advantus Controller, if necessary
Flame Disappears
During a Run
Cycle

The Advantus boiler was running
and flame signal suddenly
disappeared.

Lockout: 106, 107, 108, 109
• Verify that all air has been purged from gas line
• Verify that boiler is properly grounded
• Inspect
UV Scanner and associated wiring. Replace if necessary
• Remove the detector and clean the viewing window with a soft, clean
cloth
• Clean the inside of the sight pipe before re-installing the detector
• Adjust the blocked flue switch. Turn clockwise to reduce sensitivity
• Verify incoming gas supply pressure and that it coincides with Table 7.
• Verify that the gas line connections to the boiler are adequate. Refer to
Table 6.
• Verify that the vent/ air inlet piping (if equipped) are correctly installed
and obstructions are not present
• Verify that 24 VAC is being supplied to the
Low-End Gas Valve during
operation. If a signal cannot be detected, the transformer needs to be
replaced
• Verify that 115 VAC is being supplied to the
High-End Gas Valve
during operation
• Inspect the burner. Refer to Burner Maintenance in section 10.5
• Replace the
Advantus Controller if necessary