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A5: Antifreeze
It indicates the differential controlling the ON/OFF status of the antifreeze heaters.
A6: Support heater probe
It indicates the probe to be used (B1 or B2) for the control of support heaters. The
meaning of the parameter is as follows:
Alarms (parameters "P")
P1: Delayed flow-switch alarm at pump start-up
It allows to set a time-delay to elapse before showing the flow switch alarm at pump start-up (the flow rate needs a
certain time to settle, so the delay is meant to avoid any unstable signal from the sensor. This function allows to avoid to
stop the unit in case of presence of double pump group and a possible automatic rotation after a failure in one of this).
P2: Delayed flow-switch alarm during normal operating
It indicates a time-delay which is to elapse before showing the flow-switch alarm during normal operation. The alarm, in
fact, might be due to capacity variations or air bubbles in the water circuit and this function allows to avoid to stop the unit
in case of presence of double pump group and a possible automatic rotation after a failure in one of this.
P3: Delayed low pressure alarm at compressor start-up
It indicates a time-delay which is to elapse before showing the low pressure alarm at compressor start-up so as to reach
a normal flow rate, avoiding any unstable signal from the sensor.
P4: Buzzer
It indicates how long the buzzer will sound in the event of an alarm situation:
• if P4 = 0, the buzzer remains always OFF.
• with a range between 1 and 14 minutes, the buzzer automatically silences after the selected P4 time
• if you set P4 = 15, the buzzer will not stop until the alarm condition disappears.
P5: Reset alarms
It allows to enable an automatic reset for all those alarms which normally have a manual reset (high pressure, low
pressure, flows witch and antifreeze) according to the table here below:
Value
Selection
0 (default)
High pressure, low pressure and antifreeze (low temperature) with manual reset
1
All alarms with automatic reset
P6: Second set of parameters
If P6=1, it allows to activate a second set of DIRECT, USER and FACTORY parameters; in such a situation the following
parameters turn from U level (as indicated in the table of parameters in this manual) to F level, which is accessible
through user password:
• parameters "/"; from /6 to /C (included)
• parameters "r"; from rA to rd (included)
• parameters "c"; from c1 to c3 (included)
• parameters "F"; they all turn to F level
• parameters "d"; they all turn to F level
• parameters "A"; they all turn to F level
• parameters "P"; from P1 to P3 (included)
• parameters "H"; remain unaltered
RG66000889-REV.OO
Carel NTC Probes
Antifreeze alarm differerntial Antifreeze
Antifreeze alarm set point
heaters
Heaters
Antifreeze
Antifreeze
heaters
26
set
Value
Selection
0
B1
1
B2
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