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Technical Information
6.3
Defrost request using keyboard
•
Press the
button for 5 s
•
When a "0" is displayed, use the
or
buttons to enter password "27" (factory setting)
•
Press the
button to start the defrost cycle.
•
This causes the defrost interval to be re-set.
6.4
Temporary daytime operation using keyboard
•
Press the
button for 1 s
•
With the cooling controller in nighttime operation, this causes a time-limited daytime operation period
for loading goods into the cabinet. After the configured amount of time has expired, the cabinet returns
to nighttime operation.
6.5
Standby (cleaning mode) using keyboard
•
Press the
button for 5 s
•
When a "0" is displayed, use the
or
buttons to enter password "27" (factory setting)
•
Press the
button to start the standby mode.
•
Another press on the
button stops the standby mode and cooling is restarted.
7
Setting of real-time clock
The real-time clock can be configured using two writing variables. The time can be read using two reading
variables.
Required battery: Lithium CR1220, 3V.
Writing parameters:
299
Current date ([year - 2000] x 12 + month - 1) x 31 day - 1
300
Current time ([h x 60] + min) x 20 + (sec / 3)
Reading parameters:
522
Current date ([year - 2000] x 12 + month - 1) x 31 day - 1
523
Current time ([h x 60] + min) x 20 + (sec / 3)
8
Defrost
8.1
Defrost controls
The defrost method (natural, electric or hot-gas) can be configured by
78
“defrost mode”
parameter.
8.2
Defrost sequence
The defrost process generally consists of 4 phases:
▪
"Preliminary phase": Defrost is necessary (a defrost request is pending), but the defrost process cannot
start yet (because the compressor cannot be stopped for natural or electric defrost or the hot-gas
defrost cannot be started).
▪
"Defrost": The defrost is in process.
▪
"Drain phase": The defrost process is finished, but the system is in standby mode in order to allow the
evaporator to dry off. The drain phase is stopped after a certain amount of time (in accordance with
the time setting of the
32
“Defrost drain time"
configuration parameter.
▪
"Synchronization": The system is waiting for the end of the defrost phase of neighboring cabinet before
it continues with refrigeration operation. This status is terminated when all controllers in the defrost
synchronization chain have finished their defrost operation or after cancellation of the status over time
(timeout). The corresponding timeout is defined according to the
30
“Day defrost termination time”
respectively
31
“Night defrost termination time”
parameter.
