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5
Information/Alarms
5.1
General
The heat pump is equipped with several safety features,
which prevent problems and damage to the equipment.
These include temperature control and operation of
critical parts. In addition, anti-seizure operation of all
circulation pumps and 3-way valve Q21/E4x.Q1x occurs
for one minute if they have not been used for 7 days.
The heat pump reacts to operational disturbances by
providing information or giving an alarm.
A disturbance is indicated/stored/
remedied/acknowledged in the heat pump
where it occurred.
5.2
Alarm categories
Some disturbances are more serious than others.
Alarms are therefore categorised.
C: Information that is acknowledged automatically when
the cause disappears. Disturbances are often temporary
and disappear of their own accord.
B: Action must be taken but can wait until normal
working hours. With some alarms, the operation of the
heat pump is restricted until the fault is rectified and the
alarm is acknowledged.
A: Must be rectified immediately to prevent damage to
the system/equipment.
5.3
Status lamp
The status lamp on the control unit is used to show ON/
OFF status for the heat pump but also to show possible
alarms.
With Information (category C) no indication is given.
The lamp lights green.
The lamp flashes green
slowly.
The lamp flashes red.
The lamp lights red.
Tab. 49 Lamp functions
6 720 645 172 (2010/07) en
The control unit is
activated.
The control unit is
switched off/stand-by
mode (Off).
An alarm is active or has
not been acknowledged.
The alarm has been
acknowledged but the
alarm cause remains.
5.4
Alarm list and Alarm history
When a disturbance occurs, a fault message is stored in
the alarm list and alarm history.
The alarm list is shown by pressing
The alarm history is shown at installer level under Read
out.
The alarm history contains the last 20 or so alarms and
information messages; the most recent is shown first.
5.5
Acknowledgement of alarms
Use
to show the alarm list (status lamp lights/
flashes red). To return to the previous position, press
or
.
To acknowledge an alarm:
B Log in.
B Use
to show the alarm list.
B Use
and
to browse to the required alarm.
B Press
twice.
ok
Acknowledged is shown in the alarm window and the
alarm is taken from the list when the cause is
remedied/disappears.
If the cause of the alarm disappears but the alarm is not
acknowledged Returned is shown in the alarm window.
Acknowledge the alarm and it is removed from the list.
Information/Alarms
.
29
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