20 Manual RS8EJ302 © Danfoss 05-2010 AK-PC 530
Safety function
Criterion Compressor control Condenser control
P0 < P0 min (A11) 0% capacity. (Min ON time (c01) overrid-
den)
No change
P0 signal failure (P0 reading < 5%) Calculated average capacity No change.
Pc > Pc max. minus 3 K
(The "HP" LED on EKA 165 lights up)
The capacity changes to 2/3 of the actual
capacity. After 30 seconds it changes to
half capacity.
After a further 30 seconds there is a full
cut-out.
100% capacity
Pc > Pc max. (A30) 0% capacity 100% capacity
Pc signal failure (Pc reading < 5%) No change 100% capacity
Sc3 signal failure (Variable reference (r33) is
set to 2 or 4)
No change The variable part is omitted.
Reference (r29) = Setting (r28)
Signal failure on the regulation sensor
(Saux or S4. (o81))
The P0 reference lowers by 5 K. At the same
time, the P0 signal becomes the regulation
sensor
No change
Exercising fans
On the setting c29 = 1-8 the last fans will hardly be activated during the winter.
To ensure that the fans are ‘exercised’ a test will be carried out every 24 hours to check whether all relays have been in operation.
The relays that have not been used will now be activated for 30 seconds, but with a pause of one hour between individual relays.
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