7
C2–DIN Additional Regulations for Models RKW 3600
and higher
For chillers with cooling capacities higher than 26 kW,
the cooling capacity is divided among two cooling cy-
cles. The second cycle cannot be regulated using the
CH-DIN regulation because there are not enough inputs
and outputs and requires an additional C2-DIN regula-
tion. The C2-DIN regulation controls the same functions
together with the CH-DIN regulation. These functions
are only displayed by LEDs. An alarm from the second
cycle is displayed on the CH-DIN regulation display as a
code, e.g. “E 01”.
The CH-DIN regulation is still used to program the set-
tings of the second cycle.
ON/OFF
RESET
ON/OFF/RESET Button
This button is used to switch the unit on and off. If the
alarm has been set off and the unit has to be manually
reset, this button is pressed to prevent further alarms
from being acknowledged. At the same time, the normal
operating function of the unit is restored.
Alarm
Alarm LED
If this LED is lit up, the unit’s alarm has gone off and op-
eration has been interrupted.
SET
SET Button
The parameters settings can be changed by pressing
the SET button together with the arrow keys.
Fan Board
The fan board is connected to the CH–DIN regulation.
The CH-DIN (C2-DIN) regulation registers the current
condensation temperature via the sensor input ST 5 (ST
6) and passes along the corresponding programmed
output current to the CTK 1 (CTK 2) output of the TK 1
(TK 2) fan board.
The fan motor rotation can be controlled by the modulat-
ing output current.
Compressor LED
This LED is not lit up when the compressor is not in op-
eration. If this LED is blinking, the compressor is cur-
rently in start-up time delay and will begin operation af-
ter this time has elapsed. If this LED is continuously lit
up, the compressor is in operation. The time delay is no
longer active.
Comp
Line LED
This LED is continuously lit up when the regulation is
connected to the power supply.
Line
Fan board TK 1
Fan board TK 2
Operating Display Compressor 2
This display lights up when the compressor of the sec-
ond cycle is in operation.
Compr.
Err. compr.
Malfunction Display Compressor 2
This display lights up when there is a malfunction in the
compressor of the second cycle.
High Pressure MalfunctionCycle 2
This display lights up when pressures that are too high
have been set in the second cycle.
High press.
Low Pressure MalfunctionCycle 2
This display lights up when pressures that are too low
have been set in the second cycle.
Low press.
Malfunction Display Fan 2
This display lights up when there is a malfunction in the
fan of the second cycle.
Err. fan
C2- DIN additional regulation
CH- DIN regulation
C2– DIN Additional Regulation
C2-DIN
High press.
Err. fan
Low press.
Err. compr.
Compr.
Operating display Compressor 2
Malfunction display
High pressure 2
Malfunction display Compressor 2
Malfunction display
Fan 2
Malfunction display
Low pressure
