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Figure 8.2: 900PB Display Icons
Table 8.4: Display Icons
Icon
Central Heating enabled. CH demand active when flashing.
Central Heating disabled.
Domestic Hot Water enabled. DHW demand active when flashing.
Domestic Hot Water disabled.
Burner Active.
Emergency mode active. (Cascade Only)
Error Present on control. Description in the bottom of the display.
Cascade Managing unit.
Cascade Dependent unit. Number indicates address.
Frost Protection active.
Anti-Legionella active.
BOILER CONTROL: INTERNAL WIRING & OPERATION
Description
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