Carel FLSTDMFC0A, Manual

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FLSTDMFC0A pCO² refrigeration system
cod. Carel +030221991 rel. 1.0 dated 27/07/01
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Clock branch, screen M_CLOCK02 and M_CLOCK03
Programmable time bands have been included, allowing the variation of the Set Point. Pressing the CLOCK button accesses the
branch for programming the time bands. Once time band control has been enabled, the start time in hour and minutes of the time
band and the corresponding Set Point must be set (M_CLOCK03, clock branch). This Set Point will be referred to by the control
when the current time coincides with that of the time band, and will remain the point of reference for the system until the
following time band starts
For example, assuming time bands with the following values:
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06:00 0.9 bar from 06:00 to 07:00 the Set Point will be 0.9 bar
07:00 1 bar from 07:00 to 10:00 the Set Point will be 1 bar
10:00 1.1 bar from 10:00 to 17:00 the Set Point will be 1.1 bar
17:00 0.8 bar from 17:00 to 6:00 the Set Point will be 0.8 bar
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Four time bands can be set, and in the case where one or more are not used, it is important to attribute these the same values as
the previous band so as to not compromise the correct operation of the control.
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The individual devices can be activated manually without the time settings, rotation and irrespective of the values measured by
the probes. The only support to the control in manual operation is the alarm management. The manual activation of the inverter
devices forces the corresponding analogue outputs to the set value.
The manual procedure can be activated only if the unit is OFF; therefore, the parameters are not enabled if the unit is ON. In any
case, the procedure finishes automatically after 5 minutes.
See MAINT branch button.
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The software can manage, as well as the inlet and outlet probes, three auxiliary NTC display-only probes; these are enabled on
the screen M_CONF_PROBE4. The three probes are:
B3 ambient
temperature probe
B6 outside temperature probe. Medium and Large boards only
B7 general temperature probe (the name can be set). Medium and Large boards only
Once enabled, the value of these probes can be seen in the I/O branch
Note: if the inlet probe is connected to B7, the general temperature probe cannot be enabled.
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The unit checks all the procedures of the individual alarms: action, delays, resets and corresponding signals.
When an alarm is activated, it acts on the devices, if enabled, and simultaneously activates: the LED, the buzzer (on the external
terminal), the corresponding screen and the corresponding event recording.
To monitor the active alarm simply press the ALARM button, and use the UP/DOWN buttons to scroll any other active alarms. To
reset the relay and delete the alarms in the memory, first display the alarm screen and then press the ALARM button again.
Also see ALARM button branch, chap. 3.7.10.
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The following table explains the alarms controlled by the pCO²:
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AL0 thermal overload Klixon/generic compressor 1 OFF comp.1 manual no
AL1 thermal overload Klixon/generic compressor 2 OFF comp.2 manual no
AL2 thermal overload Klixon /generic compressor 3 OFF comp.3 manual no
AL3 thermal overload Klixon /generic compressor 4 OFF comp.4 manual no
AL4 thermal overload Klixon /generic compressor 5 OFF comp.5 manual no
AL5 thermal overload Klixon /generic compressor 6 OFF comp.6 manual no
AL6 fan thermal overload switch 1 OFF fan 1 manual no
AL7 fan thermal overload switch 2 OFF fan 2 manual no
AL8 fan thermal overload switch 3 OFF fan 3 manual no