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10 NIBE VVM 300
User guide
Dealing with malfunctions
LOW PRESSURE
This information is shown when the low pressure switch in
F20XX has tripped. This may be due to a frozen evaporator
or reduced air flow through the evaporator. Indicated as
05 in channel 00 on F20XX. (VVM 300 switches to re-
duced boiler mode*.)
The information will disappear when the cause of the er-
ror is addressed and F20XX and VVM 300 is re-started or
when the alarm is acknowledged in menu 9.3.6.
SENSOR ALARM
This information is shown when a temperature sensor in
F20XX stops working. This may be due to an open-circuit
or incorrect installation. Indicated as 08 in channel 00 on
F20XX. (VVM 300 switches to reduced boiler mode*.)
The information will disappear when the cause of the er-
ror is addressed and F20XX and VVM 300 is re-started or
when the alarm is acknowledged in menu 9.3.6.
HIGH PRESSURE
This information is shown when the high pressure switch
in F20XX has tripped. This may be due to too low charge
flow or air in the system. Indicated as 06 in channel 00 on
F20XX. (VVM 300 switches to reduced boiler mode*.)
The information will disappear when the cause of the er-
ror is addressed and F20XX and VVM 300 is re-started or
when the alarm is acknowledged in menu 9.3.6.
MOTOR SECURITY
This information is shown when the motor protection in
F20XX has tripped. The alarm may be due to dropped pha-
se because of tripped fuses or incorrectly set motor protec-
tion. Indicated as 07 in channel 00 on F20XX. (VVM 300
switches to reduced boiler mode*.)
The information will disappear when the cause of the er-
ror is addressed and F20XX and VVM 300 is re-started or
when the alarm is acknowledged in menu 9.3.6.
In the event of an alarm the relay contact closes
* Means that the compressor is blocked and the flow temperature is forced to the set minimum temperature in (menu 2.3).
To switch to normal electric boiler mode: Ensure that “Add.heat beg” appears in the display by pressing the operating
mode button. Then press the operating mode button again until “Add.heat” appears in the display.
Alarm/alarm outputs
Other information can also be shown on the display be-
sides the standard information. This applies with malfunc-
tions or for calls to take action. This type of information is
only shown in menu 1.0 (The display always automatically
returns to menu 1.0 approximately 30 minutes after the
last button was pressed). This information alternates with
menu 1.0’s standard information. At the same time the dis-
play’s background lighting flashes. When the cause of the
error is adressed zero the alarm in menu 9.3.6.
The following information can be shown:
REPLACED SENSOR
This information is displayed when sensors in F20XX are
incorrectly installed. Indicated as 12 in channel 00 on
F20XX. (VVM 300 switches to reduced boiler mode*.)
The information will disappear when the cause of the er-
ror is addressed and F20XX and VVM 300 is re-started or
when the alarm is acknowledged in menu 9.3.6.
Supply
Max 2A/250 VAC
Alarm output
COMM ALARM
Error text is displayed when contact between VVM 300
and F20XX is lost. This may be due to a wiring short-circuit
or lost power to F20XX. (VVM 300 switches to reduced
boiler mode*.)
The information will disappear when the cause of the er-
ror is addressed and F20XX and VVM 300 is re-started or
when the alarm is acknowledged in menu 9.3.6.
NOTE! VVM 300 must be powered within 5 minutes after
F 20XX restarts and communication between the products
is resumed. VVM 300 switches to reduced boiler mode*.
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