User Instructions for GECO GH21RA controller
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Page 37 Edition I
19.06.2013
11. Emergency work
Safe mode allows the boiler to work in case of damage to the feeder and or fan TRIAC, until
servicing is possible.
In order for the controller to operate the feeder/fan in safe mode, the appropriate mode
must be chosen from the controller menu for the feeder/fan to be connected to the control
module. In safe mode, the feeder must be connected to terminals 9-10 (standard 9-11), and
the fan to terminals 12-13 (standard 12-14).
The following table specifies the assignment of outputs for connected devices, in safe mode
Safe mode – assignment of controller outputs
Device
connected
Type of output
Controller terminal
Feeder
Relay
9-10
Fan
Relay
12-13