14
User
Guide RS8GY302 © Danfoss 2015-06
AK-PC
551
Fan status
Fan status
Fan speed
Here a reading of the desired condenser fan capacity is provided in %
VSD start/stop
Fan operation (frequency converter) status can be read here
Fan 1
The status of relay 1 (step 1 or relay for frequency transformer) is indicated here
Fan 2.....
The status of relay 2, 3, etc. (step 2, 3, etc.) is indicated here
Fan Runhours
Fan Run hours
VSD Runtime total
The number of hours the fans have been in operation (frequency converter operation) can
be read here
Fan 1 Runtime total
The number of hours fan relay 1 has been in the On-position (frequency transformer
has been On) is indicated here
Fan 2.....
The same function for the remaining fans
Fan cycles
Number of fans starting
VSD cycles
The number of fan starts (frequency converter) can be read here
Fan 1 Cycles total
The number of times fan relay 1 has been in the On-position (frequency converter
has been on) is indicated here
The controller checks that the fan has been active within the last 24 hours. If not,
it will be forced to start in 5 minutes, in rotation with the other fans.
Fan 2...
The same function for the remaining fans
Safety monitoring
PoA Min limit
Safety limits for min. PoA
If a low value is registered, all compressors will cut out
Min: -120°C (-1.0 bar)
Max: 30°C (159 bar)
Fac: -40°C (0.5 bar)
PoA Max alarm
Alarm limit for high PoA
If a high value is registered, an alarm will be generated
If a higher value is registered during a load limitation, the load limitation will be cancelled
until Po has returned to the reference.
Min: -30°C (-1.0 bar)
Max: 100°C (159 bar)
Fac: 100°C (5.0 bar)
PoA Max delay
Delay time for issuing a PoA max. alarm
Min: 0 min.
Max: 240 min.
Fac: 5 min.
Superheat Min lim A
Alarm limit for insufficient superheating
(Superheating is measured in the suction line by PoA and SsA.)
Min: 0 K
Max: 20 K
Fac: 0 K
Superheat Max lim A
Alarm limit for excess superheating
Min: 20 K
Max: 80 K
Fac: 80 K
Superheat delay A
Delay time before alarm is generated for insufficient or excess superheating
Min: 0 min.
Max: 60 min.
Fac: 5 min.
SdA Max limit
Safety limit for max. SdA
At 10 K under the set value, the compressor capacity will be reduced, and the entire
condenser capacity will cut in.
If the threshold is exceeded, the entire compressor capacity will cut out.
Min: 0°C
Max: 195°C
Fac: 80°C
PoB Min limit
Same settings for a suction group B
PoB Max alarm
PoB Max delay
Superheat Min lim B
Superheat Max lim B
Superheat delay B
SdB Max limit
Pc max limit
Safety limit for max. Pc
If Pc exceeds the value set here minus 3 K, the entire condenser capacity will cut in,
and compressor capacity will be reduced by 1/3 for every 30 seconds.
If Pc exceeds the threshold value, the entire compressor capacity will immediately cut out,
and an alarm will be generated when the delay time expires.
Min: -1 bar
Max: 159 bar
Fac: 40 bar
Tc Max limit
Safety limit for max. Tc
The above setting for Pc max. limit can be read as a temperature here.
-
Pc Max delay
Time delay for Pc max. alarm
The alarm will only be generated when the time delay has elapsed.
Min: 0 min.
Max: 240 min.
Fac: 0 min.
HP switch via DI
Signal from an HP switch
Define whether a signal is to be received on a DI input here.
The status of the signal can be read, and an alarm can be linked to it.
Once a signal is received, compressor capacity will cut out.
DI-demand
Yes /No
Fac: No
Safety restart time
Delayed start-up following safety cut-out
If a safety cut-out has occurred due to “Sd max. limit”, “Pc max. limit” or “Po min. limit”,
the compressors must be kept stopped for a defined period of time. The amount of
time can be set here.
Min: 0 min.
Max: 60 min.
Fac: 1 min.
Sensor alarm reset
Reset alarm after sensor error
When a sensor error has occurred, an O.K. signal must be registered within a specified
number of minutes before the controller resets the alarm. The regulation will be resumed
as soon as the sensor signal is O.K.
Min: 0 min.
Max: 30 min.
Fac: 10 min.
