8
FRCC.ES.010.A4.02
Manual
Controller Installation
Pump Down - Function
• A “pump-down” limit can be activated with the setting of parameter c33
• To avoid unwanted low pressure alarms, the setting ot this parameter should be higher than the low
pressure cut-out limit parameter c75, … e.g. below
0
Lo
w pr
essur
e swit
ch: C
ut
-In
Scr
oll: 1,5bar R
ecip: 0,5bar
Diff
er
en
tial: P
ar
amet
er
c76
Scr
oll and R
ecip: 0,7bar
Pump do
wn func
tion: P
ar
am.
c33
Scr
oll: 1,7bar R
ecip: 0,7bar
Diff
er
en
tial: P
ar
amet
er
c76
Scr
oll and R
ecip: 0,7bar
Lo
w pr
essur
e swit
ch: C
ut
-O
ut
Scr
oll: 0,5bar R
ecip: -0,3bar
Lo
w pr
essur
e cut
-out limit: P
ar
a-
met
er
c75
Scr
oll: 1,4bar R
ecip: 0,4bar
In some areas it may be necessary to reduce noise level during night time. This is possible with the “Day
/ Night” function of the Optyma Plus™ controller which limits the fan speed. For activation follow the
next steps …
• Activate the parameter menu (press upper button min. 5 sec.)
• Select parameter “r13” Night Offset (temperature offset related to condensing temperature setpoint
for daytime which is parameter “r29”)
• Push middle button and set the desired value, e.g. 005 for 5 Kelvin
• Confirm the value with a short press on the middle button. Do the same with the next parameters
which are required for the “Day / Night” - function …
• Select and set parameter “t17” Day start (hours), e.g. 006 for 06:00 a.m.
• Select and set parameter “t18” Night start (hours), e.g. 022 for 22:00 p.m.
• Select and set parameter “t07” Clock setting (hours), e.g. 011 for 11:xx a.m.
• Select and set parameter “t08” Clock setting (minutes), e.g. 035 for 11:35 a.m.
• Select and set parameter “t45” Clock setting (date), e.g. 010 for 10.xx.xx
• Select and set parameter “t46” Clock setting (month), e.g. 004 for 10.04.xx
• Select and set parameter “t47” Clock setting (year), e.g. 012 for 10.04.12
• All values will be stored with the middle button or after 20s without pressing any button
Day/Night - Function
• The controller displays the evaporation temperature in °C (main screen)
• It will show the readout of the condensing temperature in °C after pressing short the lower button
• Pressing short the middle button, the setpoint of the temperature difference between condensing
and ambient temperature appears which can be directly modified here by pressing the upper or lower
button.
• The display returns to main screen after a few seconds without any action on the buttons
Main Display
(Evaporating and Condensing
Temperature, Setpoint Tempera-
ture Difference)
Service and Maintenance
• Operation conditions of the condensing unit can
be displayed in the parameter menu by select-
ing parameters “U” … below some examples
u01 Condensing Pressure
u10 Status of DI1 (room thermostat)
u21 Superheat
U22 Condensing Temperature
U23 Evaporation Pressure
U24 Evaporation Temperature
U25 Ambient Temperature
U26 Discharge Temperature
U27 Suction Temperature
Operating Parameters
