1569H042 Ed.03
14
COMPRESSOR PROTECTION DELAY
There are three types of delay, selectable by parameter
C4
, to protect the compressor. These delays prevent
continuous compressor starts and stops due to sudden changes in temperature.
OFF-ON
(C4=0)
:
Minimum compressor OFF time before each start-up.
OFF-ON / ON-OFF
(C4=1)
:
Minimum time during which the compressor will remain ON and OFF in every cycle.
The delay time is defined by parameter
C5
.
OPERATION IN CASE OF PROBE 1 FAILURE
In the event of probe 1 failure (fault, disconnection, etc.) compressor performance will depend on
C
6 settings.
Users may choose between 3 options:
C6=0:
The compressor will be stopped until probe 1 is working again.
C6=1:
The compressor will be operational until probe 1 is working again.
C6=2:
The compressor will operate according to the average performance of the last 24 hours, taking into
account the number of starts and stops and the average time in each state (stop-start).
C6=3:
The compressor will run as scheduled in
C7
(ON) and
C8
(OFF).
SET POINT LOCKING
Using the
C2
and
C3
parameters, it is possible to set an upper and a lower limit for the Set point (
SP
), which
precludes configuring a set point that is too low or too high that could damage the installation or the stored
product.
STOP FANS AND COMPRESSOR WHEN THE DOOR IS OPENED
Parameter
P23
defines whether the compressor stops when the cold room door is opened. To do so one of the
digital inputs must be configured as "door contact" (
P10 or P11=1
) (See page 26).
If the door stays open longer than the value programmed in parameter
P24
, the compressor will return to its
normal operation.
ON
ON
OFF-ON
(C4=0)
OFF-ON / ON-OFF
(C4=1)
SP
SP
SP+C1
SP+C1
C5
C5
C5
OFF
OFF
COMP.
COMP.
Time
Time
ON
Probe 1 error (If C6=3)
C8
C8
C7
C7
OFF
COMP.
Time
