12 NIBE VVM 300
User guide
Luftningsskruv
16
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Dealing with malfunctions
Resetting the temperature limiter
The temperature limiter (6) is accessible from behind the
centre front cover and is positioned under the inner pro-
tective cover.
The temperature limiter is reset by firmly pressing in its
button. The button can be accessed from the underside
of the distribution box. The cover on the distribution box
does not need to be removed when resetting.
Helping the circulation pump to start
Q Switch VVM 300 off by setting the switch (8) to ”0”.
Q Remove the lower front cover.
Q Loosen the venting screw with a screwdriver. Hold a
cloth around the screwdriver blade as a certain amount
of hot water may run out.
Q Insert a screwdriver and turn the pump rotor.
Q Screw in the venting screw.
Q Start VVM 300 and check whether the circulation
pump runs.
It is usually easier to start the circulation pump with VVM
300 running, switch (8) set to “1”. If helping the circula-
tion pump to start is performed with VVM 300 running, be
prepared for the screwdriver to jerk when the pump starts.
Resetting the miniature circuit breakers
The MCB (7) is accessible behind the upper front access
panel and is located to the right of the panel.
Normal mode of the miniature circuit-breaker is “1” (up).
Venting screw
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