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6. Designations
HP
(High Pressure):
High pressure downstream of the compressor.
LP
(Low Pressure):
Low pressure upstream of the compressor (suction-side).
HPS
(High Pressure Switch):
Adjustable HP value to switch off the compressor and to issue an
alarm signal.
Hdt
(High Pressure Delay Timer):
Adjustable delay for the HPS in order to avoid unstable system
behaviour.
HPd
(HP Switch Differential Pressure):
Adjustable differential pressure relative to the HP value in order to
switch on the compressor again.
HPC
(High Pressure Control):
Adjustable HP value for controlling a fan at the condenser.
HIF
(HP Differential Pressure):
Adjustable differential pressure relative to HPC in order to switch off
the fan at the condenser.
LPS
(Low Pressure Switch):
For controlling the pressure at the suction side of the compressor, in
combination with automatic resetting.
LIF
(LP Differential Pressure):
Adjustable differential pressure in combination with condenser and
fan motor control.
Ldt
(LP Delay Timer):
Adjustable delay for deactivation of the LPS in order to avoid
unstable system behaviour.
FAN
(Fan control):
Switch fan control on or off via an analogue output.
FHP
(Fan High Pressure):
HP pressure at which the maximum analogue value is output (active
with "FAN ON")
FLP
(Fan Low Pressure):
HP pressure at which the minimum analogue value is output (active
with "FAN ON")
FLL
(Fan Low Level):
Minimum analogue value for the range at the output in %
HHA
(Manual Mode & Automatic Mode):
Resetting of the HPS when HP = HPS - HPd.
A: HPS is reset again automatically.
H: HPS is not reset until acknowledgement is given with button 3.
LHA
(Manual Mode & Automatic Mode):
Resetting of the LPS when LP = LPS - LIF
A: LPS is reset again automatically.
H: LPS is not reset until acknowledgement is given with button 3.
GAS:
For setting the used refrigerant.
Unt:
For setting the displayed pressure unit.
C-F:
For setting the displayed temperature unit.
ADD:
Setting of the device address at the RS485 communication connec-
tion for use at the Modbus RTU.
RES:
Resetting of all adjustable parameters to their default values.
