Danfoss DHP-R 7Ua, User Manual

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20 – Danfoss VUBMG102
If you don’t touch the buttons on an operator panel for 15 minutes, it will enter
a basic mode where it shows an overview menu. In the controller for a master
pump it will alternate between three overview menus. If an alarm becomes
active, the active alarms menu is shown.
The menus Heat pump state, Master state, and Hp overview are overview me-
nus. It is not possible to use the up and down arrow keys in these menus. A
slave heat pump has only the Heat pump state overview menu.
In the other menus, Active alarms, Alarm history, Operation mode, Informa-
tion, Settings, Accessory modules, System settings, and Language, individual
menu elements can be selected using the up and down arrow keys. The active
menu element will be indicated by underlining. Sub menus are written in capi-
tal letters and marked with … A selected sub menu is opened when Ok is pres-
sed. If the selected menu element is a value or setting that can be changed,
the editing mode is entered when Ok is pressed. The value to be edited then
starts to blink, and is changed using the up and down arrow keys. Some values
can only be increased or decreased; others are edited one number or letter at a
time. Select the number to edit using the right and left arrow keys. To end and
save an edit, press the Ok button. To abort, press escape.
To return to a menu on a higher level, press escape.
3�3 alarms
The menu Active alarms shows all the alarms that are currently active, if there
are any. The alarms monitor the occurrence of errors. Some alarms indicate se-
rious malfunctions that may cause the heat pump to be damaged, or disabled.
These alarms are classified as A-alarms, and the heat pump cannot run as long
as an A-alarm is active. Other alarms are classified as B-alarms, which does not
necessarily mean that the fault is not serious, but it will not prevent the heat
pump from starting.
Alarms can work in three different ways. Some alarms need to be acknowled-
ged before they becomes inactive. Before acknowledging, make sure that the
fault causing the alarm has been corrected. Other alarms will automatically
become inactive when the fault condition is gone. The third kind of alarm will
automatically become inactive, but will remain in the list of active alarms until
acknowledged. This is to make sure that the operator notices the event.
If one alarm in the list of active alarms is selected and Ok is pressed, more in-
formation about that alarm is displayed. Press Ok again to acknowledge the
alarm. The operator acknowledging an alarm gets the opportunity to enter a
signature of up to three letters.
In the menu Alarm history all alarms, events and errors that have occurred la-
tely can be seen. One alarm at a time is displayed in chronological order, with
the most recent displayed first. Change the displayed alarm using the up and
down arrows. Alarms are first noted in the list when they become active, and