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SECTION 13
Troubleshooting
13.A
Error Codes
Condition
Information
Corrective Action
Flow Switch
•
Insufficient flow at the outlet of the
boiler/heater
•
Auto-reset Condition
•
Annunciation – “Warning Flow
switch open” on Message Screen
•
Faulty boiler/heater pump –
replace pump.
•
Faulty pump contactor – replace
contactor.
•
Blown boiler/heater pump fuse –
replace fuse F14 on the control
board.
Low Water
Cut Off
•
Insufficient water level in the
boiler/heater heat exchanger.
•
Manual-reset Condition
•
Annunciation – on Navigation Bar
•
Reset the LWCO from the reset
button on the LWCO module.
•
Verify the system is full of water
and all air has been purged from
the system.
•
Check for loose jumpers if the
LWCO is not installed.
Manual
Reset High
Limit
•
Outlet water temperature has
exceeded the manual reset high
limit setting
•
Manual-reset Condition
•
Annunciation – on Navigation Bar
•
Verify the system is full of water
and all air has been purged from
the system.
•
Verify the boiler/heater is piped
properly into the heating system.
•
Check for proper pump
operations.
•
Check the manual reset high
limit set point.
Auto Reset
High Limit
•
Outlet water temperature has
exceeded the auto reset high limit
setting
•
Auto-reset Condition
•
Annunciation – “Warning High limit
auto error” on Message Screen
•
Verify the system is full of water
and all air has been purged from
the system.
•
Verify the boiler/heater is piped
properly into the heating system.
•
Check for proper pump
operations.
•
Check the manual reset high
limit set point.
Gas Valve
Lockout
•
SV2 Gas Valve Lockout refer to gas
valve display for detailed diagnostic
information
•
Annunciation – on Navigation Bar
•
Annunciation – “Safety Chain open
SV2 Valve ILK” on Message Screen
Boiler
•
Refer to Gas valve Diagnostic
menu active lockouts for detailed
troubleshooting information.
High Gas
Pressure
•
The high gas pressure switch has
tripped
•
Manual-reset Condition
•
Annunciation – on Navigation Bar
•
Refer to Section 3 for Gas
Supply and Piping information.
•
Verify supply and manifold gas
pressures satisfy installation
requirements.
Low Gas
Pressure
•
The low gas pressure switch has
tripped
•
Manual-reset Condition
•
Annunciation – on Navigation Bar
•
Refer to Section 3 for Gas
Supply and Piping information.
Lockout: Low Water Cut Off
Lockout: Man Reset High Limit
Lockout: Open Safety Chain
Lockout: High Gas Pressure
LAARS Heating Systems
