Leak Alarms; External Fault; Chapter 5.1.7, Adding Liquid - Danfoss VACON NX Commissioning And Maintenance Manual

TROUBLESHOOTING
7.1.4 Leak alar ms
If the l eak al ar m is active (acc. to panel below) the HX-
to the main drive is connected. The yellow and green indicator lights on the electrical box door are
also active. Check the following issues to solve why the alarm has been activated:
RUN READY ALARM
F1.
I/ O ter m

51 External Fault

F F1 F12
Figure 7.1-5, Leak alarm on the NXP panel
Mal function
Leak
Condensation
Other reason
Figure 7.1-5, Leak fault detection
Local contacts: http:/ / dr ives.danfoss.com/ danfoss- dr ives/ local - contacts/

Reasons for mal function
Loose connection.
Faulty connection.
The secondary circuit
liquid temperature is
too low in regard to the
ambient temperature
and relative humidity.
No condensation or leak is
found but the alarm is
still active.
Cor r ection measur es
Tighten the connection until the leak stops.
Add liquid to the primary circuit until the
correct pre-pressure is reached. Follow
the instructions in
liquid and de-airing.
Replace the broken parts. Then add liquid to
the primary circuit until the correct pre-
pressure is reached.
instructions in

chapter 5.1.7, Adding liquid

and de-airing.
If the cooling process allows it then increase
the secondary
temperature until the condensation stops.
Decrease the humidity or the temperature in
the cubicle until the condensation stops.
If there is condensation on the secondary
circuit piping, insulate the secondary
circuit pipes and the plate heat exchanger,
HX11.
Try resetting the alarm on the reset switch. It
is the push button in the lower right corner
of the HX-unit electrical box door. Try to
wipe off the sensor and the leakage plate
with a dry cloth. If the yellow light is still on
then the sensor is most likely broken and
will need to be replaced.
VACON 5 5
chapter 5.1.7, Adding
Follow the
circuit inlet liquid
7