|
|
| Detection |
| |
|
| Hi Delta | Delay |
| LCD Display Readout With Fault |
|
|
|
|
| Cond Drain Blocked/Vent Temp Limit Err |
PVC Vent | 1 |
| Check Drain Switch, Check Drain/Check Vent System | ||
|
|
|
|
| Man Hi Limit Fault |
Manual High Limit | 1 |
| Confirm Settings, Reset Hi Limit | ||
|
|
|
|
| Auto Hi Limit Fault |
Auto High Limit | 1 |
| Confirm Settings, Check Pump | ||
|
|
|
|
| Lo Water Cutoff Err |
|
|
|
|
| Purge Air, Check Pump, Chk Isolation Valve, |
Low Water | 1 |
| Reset LWCO | ||
|
|
|
|
| Vent Pressure Fault |
Vent Pressure | 1 |
| Blocked Vent, Check Vent System | ||
|
|
|
|
| Lo Gas Press Fault |
Low Gas Pressure | 1 |
| Confirm Settings, Check Supply Gas, Reset LGPS | ||
|
|
|
|
| Hi Gas Press Fault |
High Gas Pressure | 1 |
| Confirm Settings, Check Supply Gas, | ||
|
|
|
|
| Controller Alarm |
Controller Alarm | 1 |
| See Control Display | ||
|
|
|
|
| Water Flow Sw Fault |
| Flow Switch | 3 |
| Check Boiler Pump, Purge Air, Replace Flow Switch | |
|
|
|
|
| Blower Air Sw. Fault |
Blower Switch | 3 |
| Check Air Filter, Check Blower, Check Air Sw. Hose | ||
|
|
|
|
| Factory Option Fault |
|
|
|
|
| Check Factory Data, Check Wiring Diagram, Check |
|
|
|
|
| Freeze Control, Check Water Pressure |
Factory Option | 3 |
|
| ||
|
|
|
|
| Field Interlock Err |
|
|
|
|
| Check Louvers, Check Comb. Damper, Check |
External Interlock | 90 |
| Extractor Sw. | ||
|
| ||||
|
|
|
|
| CWS/CWR Fault |
| CWS/CWR | 3 |
| Confirm Inlet Temp, Reset CWS/CWR Cntrl | |
|
|
|
|
| Ignition Lockout |
|
|
|
|
| Display actual Fault Flash Code |
|
|
|
|
| Recycle/Reset Control, Push Reset Button |
Ignition Lockout | 1 |
| See Table Below | ||
|
|
|
|
|
|
Field |
|
|
|
|
|
Interlock # | Fault |
|
|
| |
Flashes |
|
|
| LCD Display Readout With Fault | |
1 |
| Low Air |
|
| Low Air Fault |
|
|
|
| Check Blower, Check Filter, Check Air Sw. Hose | |
2 |
| Flame - No CFH |
|
| Flame - No CFH |
|
|
|
|
| Shut Off Gas Supply, Recycle Power |
3 |
| Ignition Lockout |
|
| Ignition Lockout |
|
|
|
|
| Recycle/Reset Cntrl, Push Reset Button |
4 |
| Low HSI Current |
|
| Low HSI Current |
|
|
| Check HSI Current, Replace HSI, Recycle Power, Replace Ign. | ||
5 |
| Low 24VAC |
|
| Low 24 VAC |
|
|
|
|
| Check Power Supply, Check Transformer |
6 |
| Internal Cntrl Fault |
|
| Internal Cntrl Fault |
|
|
|
|
| Recycle/Reset Cntrl, Replace Control |
|
|
|
|
|
|
| Condition |
|
| LCD Display Without Fault | |
Power On / No CFH |
|
| System Normal | ||
|
| Standby / WebSite* | |||
Power On / CFH |
|
| System Normal | ||
|
| CFH Active / WebSite* | |||
|
|
| *Toggles Between / | ||
Table R: UDB Fault Messages
39
