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Fault finding guide
Introduction
This section will give you an instruction in locating the fault, when the fail LED on the
control panel is active.
DanLink
Besides fault finding from the LED signals Dantherm can provide DanLink as
accessory. DanLink can provide you with specific information of where the fault is
located.
For further information about DanLink, please contact Dantherm A/S.
Fail LEDs
The control panel is equipped with three failure or alarm relays.
These three relay’s give alarms depending on the degree of alarm. The alarms are
categorized as follows:
Category
Fail LED
When to be cleared…
Warning
Permanently lit
To be cleared when convenient
Fail Slowly
flashing
(½ Hz ~once every 2 seconds)
To be cleared soon but not
immediately
Alarm Fast
flashing
(2 Hz ~ 2 per second)
To be cleared as soon as possible
Fault
during test
Flashing
(1 Hz ~1 each second) for 30
seconds after the test has
ended
After the 30 seconds the LED will act
according to the severity of the fault
(one of the 3 above), and you should
act accordingly
The following gives you a description of each type of alarm.
Warning
A warning is activated on one of the following events:
•
The hot spot temperature sensor is short circuited
•
The return air temperature is 10 °C or more above the damper set point. The alarm
will be cleared when the temperature again is 8 °C or less above the set point
Fail
A fail is activated on one of the following events:
•
Loss of mains power
•
Fail on ambient air sensor – short or open circuit
•
Smoke alarm input activated
Continued overleaf
