AK-PC 772A Capacity controller RS8HF102 © Danfoss 2017-07 113
Display of suction pressure and condensing pressure
One to four separate displays can be connected to the controller.
Connection is accomplished by means of wires with plug
connections. The display may be placed in a control box front, for
example.
When a display is connected, it will show the value for what is indi-
cated in the setup. It can be:
Suction control Temperature
T0-MT
P0-MT pressure
T0-LT
P0-LT pressure
Ss-MT
Sd-MT
Ss-LT
Sd-LT
Cond. control sensor
Tc-MT
Pc-MT pressure
Sgc
Pgc
Prec
MT Speed compressor
LT Speed compressor
When (on plug A) a display with control buttons is chosen, a sim-
ple operation via a menu system can be performed in addition to
the display of suction pressure and condensing pressure:
If you want to see one of the values for what is given under "func-
tion" you should use the buttons in the following way:
1. Press on the upper button until a parameter is shown
2.Press on the upper or lower button and find the parameter you
want to read
3. Press on the middle button until the value of the parameter is
displayed.
After a short time, the display will return automatically to the
"Read out display".
No. Function
o57 Capacity settings for condenser
0: MAN, 1: OFF, 2: AUTO
058 Manual setting of condenser capacity
o59 MT Capacity setting for suction group
0: MAN, 1: OFF, 2: AUTO
o60 MT Manual setting of suction capacity
o93 Lock of configuration
It is only possible to select a predefined configuration or change refrigerant when the
configuration lock is open.
0 = Configuration open
1 = Configuration locked
P62 LT Manual setting of suction capacity
P63 LT Capacity setting for suction group
0: MAN, 1: OFF, 2: AUTO
r23 MT Set point suction pressure
Setting of required suction pressure reference in °C
r24 MT Suction pressure reference
Actual reference temperature for compressor capacity
r12 Main switch
0: Controller stopped
1: Regulating
r28 Set point condenser
Setting of required condenser pressure in °C
r29 Condenser reference
Actual reference for temperature for condenser capacity
r57 MT To evaporating pressure in °C
r90 LT To evaporating pressure in °C
r91 LT Suction pressure reference
r92 LT Set point suction pressure
u21 MT Superheat in suction line
u44 Sc3 out door temperature in °C
u48 Actual regulation status on condenser
0: Power up
1: Stopped
2: Manuel
3: Alarm
4: Restart
5: Standby
6: Unloaded
7-9: Part loaded
10: Full loaded
11: Running
u49 Cut in condenser capacity in %
u50 Reference for condenser capacity in %
u51 MT Actual regulation status on suction group
Actual regulation status on suction group MT circuit
0: Standby
1: Normal control
2: Compressor alarm
3: ON timer active
4: OFF timer active
5: Normal control
6: Injection ON delay
7: Coordination
8: Compressor 1 delay active
9: Pump down
10: Sensor error
11: Load shed is active
12: High Sd
13: High Pc
14: Manual control
15: OFF
u52 MT Cut in compressor capacity in %
u53 MT Reference for compressor capacity
u54 MT Sd discharge gas temperature in °C
u55 MT Ss Suction gas temperature in °C
U01 MT Actual Pc condensing pressure in °C
U46 LT Reference for compressor capacity
U47 LT Cut in compressor capacity in %
U48 LT Actual regulation status on suction group (see value in u51)
U49 LT Actual Pc condensing pressure in °C
U50 LT Ss Suction gas temperature in °C
U51 LT Sd discharge gas temperature in °C
U52 LT Superheat in suction line
AL1 Alarm suction pressure
AL2 Alarm condenser
- - 1 Initiation, Display is connected to output "A", (- - 2 = output "B" etc.)
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