Danfoss Optyma Plus - Page 35

Condensing unit controller
Function Code Min.value Max.value
Default
controller
settings
Unit controller
settings
Read-out of operating time of heating element in crankcase.
(Value must be multiplied by 1,000). The value can be adjusted
P50 - - 0 h
Read-out of number of HP alarms. The value can be adjusted P51 - - 0
Read-out of number of LP alarms. The value can be adjusted P52 - - 0
Read-out of number of Td alarms. The value can be adjusted P53 - - 0
Oil return management. Compressor speed for the counter
starting point
P77 30 rps 70 rps 40 rps
Oil return management. Limit value for counter P78 5 min. 720 min. 20 min.
Oil return management. Boost-speed P79 40 rps 100 rps 50 rps
Oil return management. Boost-time P80 10 s 600 s 60 s
Service
Readout pressure on Pc u01 bar
Readout temperature Taux u03 °C
Status on DI1 input. 1=on=closed u10
Status on night operation (on or off) 1=on=night operation u13
Readout superheat u21 K
Readout temperature at S6 sensor u36 °C
Status on DI2 input. 1=on=closed u37
Readout the compressor capacity in % u52 %
Status on relay to compressor. 1=on=closed ** u58
Status on relay to fan. 1=on=closed ** u59
Status on relay to alarm. 1=on=closed ** u62
Status on relay “Aux”. 1=on=closed ** u63
Status on relay to heating element in crank case. 1=on=closed ** u71
Status on high voltage input DI3. 1=on=230 V u87
Readout condensing pressure in temperature U22 °C
Readout pressure Ps U23 bar
Readout suction pressure in temperature U24 °C
Readout ambient temperature Tamb U25 °C
Readout discharge temperature Td U26 °C
Readout suction gas temperature Ts U27 °C
Readout the voltage on the output AO1 U44 V
Readout the voltage on the output AO2 U56 V
NOTICE
Following controller parameters are
modified from factory setting by condensing unit
production.
All Other parameters in «unit controller setting»
are same as "Default controller setting"
- r12: 1 (main switch = ON).
- c71: 2 (compressor type = variable speed
compressor).
- c73: 25.8 (max. condensing pressure =
25.8bar(g)).
- c75: 2.0 (min. suction pressure = 2.0 bar(g)).
- o30: 41 (refrigerant: 19=R404A, 21=R407A,
37=R407F, 40=R448A, 41=R449A).
- o61: 55, 56 or 57 (compressor size: 55=VLZ028,
56=VLZ035, 57=VLZ044).
Following parameter should be modified by
installer if controller is used as pump down device.
- c33: 2.3 (pump down limit, should be min.
0.3bar higher than c75 to avoid
unwanted alarms).
Modification of controller parameters shall be
done by qualified persons only.
In case of any problems with controller it is
possible to connect unit bypassing it: see details in
chapter 4.3.1 of this guideline.
35FRCC.PC.044.A6.02
Application Guidelines