Controller Settings - Danfoss Optyma Plus Application Manuallines

Application Guidelines

6.12 Controller settings

NOTE! In case of controller replacement beware that unit controller settings are different from default controller factory settings!
Function
Normal operation
Set point Tc (regulation reference follows the number of degrees
above the outside temperature Tamb)
Regulation
Select SI or US display. 0=SI (bar and °C). 1=US (Psig and °F)
Internal Main Switch. Manual and service = - 1, Stop regulation = 0,
Start regulation =1
Offset during night operation. During night operation the
reference is raised by this value
Set point for suction pressure Ts
Readout of reference for Tc
Min. condensing temperature (lowest permitted Tc reference)
Max. condensing temperature (highest permitted Tc reference)
Max. discharge gas temperature Td
Alarms
Alarm time delay on signal on the DI2 input
Alarm for insufficient cooling in condenser. Set temperature
difference.
Delay time for A70 alarm
Compressor
Min. ON-time
Min. OFF-time
Min. time between compressor starts
Pump down limit at which the compressor is stopped (setting 0.0
= function dis-activated)
Min. compressor speed
Start speed for compressor and min. speed for high condensing
temperatures
Max. compressor speed
Max. compressor speed during night operation (% value of c48)
Definition of compressor control:
0=no external start/stop;
1=switch on DI1 must start/stop;
2=inverter compressor speed control
Time delay for high Td. The compressor will stop when time
expires
Max. pressure. Compressor stops if a higher pressure is recorded
Difference for max. pressure (c73)
Min. suction pressure Ps. Compressor stops if a lower pressure is
recorded
Difference for min. suction pressure and pump down
Amplification factor Kp for compressors PI regulation
Integration time Tn for compressors PI regulation
Liquid Injection Offset
Liquid Injection hysteresis
Compressor stop delay after Liquid injection
Desired compressor speed if the signal from the pressure
transmitter Ps fails
Min On time during Low Ambient LP
Measured Tc for which the Comp min speed is raised to StartSpeed
Control parameters
Amplification factor Kp for PI regulation
Integration time Tn for PI regulation
Kp max for PI regulation when the measurement is far from
reference
Condensing unit controller
Code Min.value Max.value
--- 2.0 K 20.0 K
r05 0/ °C 1/F
r12 -1
r13 0 K 10 K
r23 -25 °C 10°C
r29 -
r82 0°C 40°C
r83 0°C 50°C
r84 50°C 160°C
A28 0 min. 240 min.
A70 3.0 K 20.0 K
A71 5 min. 240 min.
c01 5 s 240 s
c02 3 s 240 s
c07 0 min. 30 min.
C33 0.0 bar 15.0 bar
c46 30 rps 70 rps
c47 30 rps 70 rps
c48 50 rps 100 rps
c69 50% 100%
c71 0
c72 0 min. 20 min.
c73 7.0 bar 50.0 bar
c74 1.0 bar 10.0 bar
c75 -0.3 bar 10.0 bar
c76 0.1 bar 5.0 bar
c82 3.0 30.0
c83 30 s 360 s
c88 0.1 K 20.0 K
c89 10.0 K 30.0 K
c90 0 s 10 s
c93 30 rps 70 rps
c94 0
c95 40.0 10.0
n04 1.0 20.0
n05 20 120
n95 5.0 50.0
Default
Unit controller
controller
settings
settings
8.0 K
0/ °C
1 0 1
2 K
-7°C
- -
10°C
40°C
135°C 125°C
30 min.
10.0 K
30 min.
5 s
30 s
5 min.
0.0 bar 2.3
30 rps
50 rps
100 rps
70%
2 1 2
3 min.
23.0 bar 25.8
3.0 bar
3.0 bar 2
0.7 bar
20.0
60 s
5.0 K
15.0 K
3 s
60 rps
0 120
70.0
7.0
40
20.0
FRCC.PC.044.A6.02
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