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Commissioning
Safety check of heating appliance
Monitoring of the safety device
of the heating appliance
Checking the safety devices of the
boiler can be carried out using the
Flue Cleaner Key (8).
Press and hold the Flue Cleaner Key
(8) until the red LED (3) light is
illuminated then release immeadiatly.
Note: If the button is pressed for too
long i.e until the Red LED flashes with
a double flash then the boiler has
been put into Commissioning mode.
You will then need to reset and start
again.
Once in this mode the LED (3) will
flash and display will alternately flash
between "SF" and the boiler flow
temperature.
The boiler is now working at maximum
output in heating mode, and will
continue to do so until the safety
devices of the boiler are activated.
(On exceeding the temperature limit,
the appliance locks, the red LED (3)
flashes continually and the display
shows safety code 111.)
To resume operation, after cooling of
the appliance press RESET (6) key.
Protection system of heating
appliance
The boiler is protected from operating
faults by internal monitors in the
microprocessor circuit board, which
when necessary lock the appliance for
safety reasons. In the case of an
appliance being locked, a code is
shown on the display which gives the
type of locking and its cause. Two
types of locking can occur:
Safety Shut-Off
This type of fault is
"temporary",
i.e. the fault is automatically
corrected, as soon as its cause is
corrected. Thereupon the
appliance switches itself on again
and resumes its normal operation.
While the appliance is in safety
stop, you can try to set it going
again by switching off and then on
again.
If safety switch-off occurs
repeatedly, please contact MHS
Service / Technical Support.
Locking
This type of fault is "Permanent",
the heating appliance can be reset
by pressing Key (6).
There follows a list with possible
operating messages and the
corresponding codes shown on the
display.
