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Status Signal |
Description |
|
Remedial actions by service engineer | |
1. Flash Green | Temperature Protection |
• Maximum flow temperature exceeded • Flow temperature rise rate too high • Excessive difference between flow and return temperature |
• Check system circulation & pump operation • Check demands for boiler operation (switched live operation) • Check temperature setting • Check temperature sensors in boiler |
|
2. Flashes Green | Shutdown Input | • BL terminals on User Interaction Controller are open circuit |
• If condensate pump is wired to these terminals check operation of condensate pump • Check wiring to BL terminals (link present or connections to external device correct) |
|
3. Flashes Green | Flame Loss | • No flame detected during operation |
• Check gas supply is turned on and gas is available if on a pre-payment meter • Check flue condition |
|
4. Flashes Green | Communication Fault |
• Bad connection or wiring fault • Internal communication fault |
• Check wiring/connections between boiler and User Interaction Controller and within the box • If necessary replace control/fan assy |
|
5. Flashes Green | Parameter Fault |
• Parameter error or faulty PU • Configuration error or PCB fault |
• Replace PU and recommission • Replace control/fan assy |
|
6. Flashes Green | Miscellaneous | • Internal fault in combustion control unit |
• Replace combustion control unit
|
Status Signal | Description | Possible causes | Remedial actions by service engineer |
1. Flash Red | Sensor Error |
• Bad connection to flow or return temperature sensor • Fault with flow or return temperature sensor(s) • Low or no flow through boiler • Reverse flow through boiler |
• Check connections to temperature sensors/PCB and condition of wiring loom • Check resistance of temperature sensors • Check pump operation and system circulation |
2. Flashes Red | High temperature protection |
• Over-temperature thermostat on heat exchanger activated • No water flow through heat exchanger • Over-temperature thermostat fault or bad connection (open circuit). • PCB over-temperature condition • Flue fault resulting in recirculation or activation of air pressure switch (if fitted) |
• Check connections to and operation of O/T thermostat and air pressure switch (if fitted) and PCB and condition of wiring loom • Check system pressure or that system is not air-locked • Check pump operation and system circulation • Check flue condition |
3. Flashes Red | Ignition fault |
• No ignition • No flame detected following ignition • False flame signal detected • Repeated loss of flame detected |
• Check earthing of the appliance • Check ignition electrode condition and clean/replace if necessary • Check gas valve operation • Check flue condition • Check correct combustion/gas valve settings • Check condensate drain for blockage |
4. Flashes Red | Fan fault |
• Fan calibration error • Fan failure |
• If fan operates, check flue installation and condition. • Replace control/fan assy |
5. Flashes Red | Parameter fault |
• Bad connection to PU • Parameter error or faulty PU |
• PCB and condition of wiring loom • Replace PU and recommission |
6. Flashes Red | Miscellaneous |
• Bad connection or wiring fault internal or external to the boiler • Parameter error • Communication error |
• Check all wiring connections are correctly made • Using a service tool or Recom software check all parameter settings • If necessary replace PU and/or control/fan assy |