Heatmaster 71 Installation, Operating And Servicing Instruction page 30

MCBA PARAMETERS FOR THE SPECIALIST
COMMUNICATION MODE [with code]
This mode displays communication between the boiler
and the control module, the optional interface kit
or the optional programmable room thermostat.
Key Display
MODE
Key Display
STEP
Fan mode [with code]
Key Display
MODE
STEP
664Y2500.B
Description
of the parameters
No communication
Communication between
the boiler module and the
optional control module
Communication between all
the connected devices
Description
of the parameters
Fan speed
The fan's current speed
is 5500 rpm.
ERROR MODE [with code]
The ERROR mode indicates the most recent error, as well
as the status of the boiler and the temperature values at
the time of this error.
Key Display
MODE
Key Display
STEP
STEP
STEP
STEP
STEP
STEP
EN • 30
Description
of the parameters
Error code at last lockout.
Status of the boiler at the time
of the error
T1 temperature at the time
of the error
T2 temperature at the time
of the error
Hot water temperature T3
at the time of the error
Outdoor temperature T4
at the time of the error