Recycle/Reset Cntrl, Replace Control
LCD Display Without Fault
Check HSI Current, Replace HSI, Recycle Power, Replace Ign.
Check Power Supply, Check Transformer
Shut Off Gas Supply, Recycle Power
Recycle/Reset Cntrl, Push Reset Button
Field
Interlock #
Flashes
LCD Display Readout With Fault
Check Blower, Check Filter, Check Air Sw. Hose
Display actual Fault Flash Code
Recycle/Reset Control, Push Reset Button
Check Louvers, Check Comb. Damper, Check
Extractor Sw.
Confirm Inlet Temp, Reset CWS/CWR Cntrl
Check Air Filter, Check Blower, Check Air Sw. Hose
Check Factory Data, Check Wiring Diagram, Check
Freeze Control, Check Water Pressure
Check Boiler Pump, Purge Air, Replace Flow Switch
Confirm Settings, Check Supply Gas, Reset LGPS
Confirm Settings, Check Supply Gas,
Purge Air, Check Pump, Chk Isolation Valve,
Reset LWCO
Blocked Vent, Check Vent System
C
onfirm Settings, Reset Hi Limit
Confirm Settings, Check Pump
L
CD Display Readout With Fault
Cond Drain Blocked/Vent Temp Limit Err
Check Drain Switch, Check Drain/Check Vent System
Table R: UDB Fault Messages
