In most cases, VVM 225 notes a malfunction (a malfunc-
tion can lead to disruption in comfort) and indicates this
with alarms, and instructions for action, in the display.
Info-menu
All the installation’s measurement values are gathered
under menu 3.1 in the indoor module’s menu system.
Examining the values in this menu can often make it
easier to identify the source of the fault.
Manage alarm
info / action
reset alarm
aid mode
Low pressure alarm
alarm
In the event of an alarm, some kind of malfunction has
occurred, which is indicated by the status lamp changing
from green continuously to red continuously. In addition,
an alarm bell appears in the information window.
ALARM
In the event of an alarm with a red status lamp a mal-
function has occurred that the indoor module cannot
remedy itself. In the display, by turning the control knob
and pressing the OK button, you can see the type of
alarm it is and reset it. You can also choose to set the
indoor module to aid mode.
info / action Here you can read what the alarm means
and receive tips on what you can do to correct the
problem that caused the alarm.
reset alarm In many cases, it is sufficient to select “reset
alarm” for the product to revert to normal operation. If
a green light comes on after selecting “reset alarm”,
the alarm has been remedied. If the red light is still on,
and a menu called “alarm” is visible in the display, the
problem causing the alarm still remains.
aid mode “aid mode” is a type of emergency mode.
This means that the indoor module produces heat and/or
hot water, even though there is some kind of problem.
This could mean that the heat pump’s compressor is
not in operation. In this case, the immersion heater
produces heat and/or hot water.
Caution
To select aid mode an alarm action must be
selected in the menu 5.1.4.
Caution
Selecting "aid mode” is not the same as cor-
recting the problem that caused the alarm. The
status lamp will therefore continue to be red.
Troubleshooting
If the operational interference is not shown in the display
the following tips can be used:
Basic actions
Start by checking the following items:
• The switch's (SF1) position.
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
• Miniature circuit breaker for VVM 225 (FC1).
• Temperature limiter for VVM 225 (FQ10).
• Correctly set load monitor (if installed).
63Chapter 10 | Disturbances in comfortNIBE VVM 225
10 Disturbances in comfort
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