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61
Lamp Number
1 2 3
Meaning
(Short pulse every 4 seconds): Heating System Knob in
“Off” position. Boiler will not respond to call for heat or
DHW. Frost protection and pump/valve exercise function
still active
(1 second pulse every 2 seconds): Heating System Knob
set to target supply temperature. Boiler will respond to a
call for heat.
Boiler responding to a call for heat
Boiler responding to a call for DHW
Boiler responding to a call for frost protection
Lamp OFF Lamp ON
Flashing lamp, alone
or simultaneously
with another lamp.
Flashing lamp,
alternate with
another lamp
Table 13.4: Flash Codes During Normal Operation
(See Part XV for Error Codes)