Carel FCM0002000 User Manual

FCM electronic regulator Cod. +302235300 - Rel. 2.0 del 30/11/98
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8.4 Alarm parameters
P25: Low threshold alarm
P25 identifies the threshold under which a Low (temperature, pressure, etc.) alarm is generated. P25 is an absolute value.
Access:
Keypad: if C50=1, 3 or 4 Ü press for 5”;
if C50=0 or 2 Ü the parameter can only be displayed.
Remote control: if C50=0, 1 or 4 Ü direct access pressing “ENABLE” and, after that, the dedicated buttons;
if C50=2 or 3 Ü the parameter can only be displayed..
Modes: all modes except C00=0 and 1 (“SLAVE DIRECT” and “SLAVE REVERSE”)
Operating range: from -40 to P26 for temperature probes or pressure probes with specified refrigerant, in °C (C18=0) or
°F (C18=1);
from 0.0 to P26 for humidity probes in rH (C18=2) or pressure probes with unspecified refrigerant in bar.
Default: P25 = -40 for FCM00NTC00 and FCM0001000 (threshold excluded)
0.0 for FCM0002000 (threshold excluded).
Note: the alarm will be generated keeping into consideration the time-delay selected through the P28 parameter. Its automatic reset
depends on the selected alarm differential P27. The alarm can be disabled giving P25 its minimum value
P26: High threshold alarm
P26 indicated the threshold beyond which the high (temperature, pressure, etc.) alarm is generated. It is an absolute value.
Access:
Keypad: if C50=1, 3 or 4 Ü press for 5”;
if C50=0 or 2 Ü the parameter can only be displayed.
Remote control: if C50=0, 1 or 4 Ü direct access pressing “ENABLE” and, after that, the dedicated buttons;
if C50=2 or 3 Ü the parameter can only be displayed.
Modes: all modes except C00=0 and 1 (“SLAVE DIRECT” and “SLAVE REVERSE” )
Operating range: from P25 to 100 for temperature probes or pressure probes with specified refrigerant in °C (C18=0);
from P25 to 212 for temperature probes or pressure probes with specified refrigerant in °F (C18=1);
from P25 to 100 for humidity probes in rH (C18=2) or pressure probes with unspecified refrigerant in bar.
Default: P26 = 100 (212°F) - threshold excluded.
Note: the alarm will be generated keeping into consideration the time-delay selected through the P28 parameter. Its automatic reset
depends on the alarm differential P27. The alarm can be disabled giving P26 its maximum value.
P27: Low/High Alarm Differential
P27 indicates the hysteresis between the value that generates a Low or High (temperature, pressure, etc.) alarm and the value which
deactivates it.
Access:
Keypad: if C50=1, 3 or 4 Ü press for 5”;
if C50=0 or 2 Ü the parameter can only be displayed.
Remote control: if C50=0, 1 or 4 Ü direct access pressing “ENABLE” and, after a that, the dedicated buttons;
if C50=2 or 3 Ü the parameter can only be displayed.
Modes: in all modes except C00=0 and 1 (“SLAVE DIRECT” and “SLAVE REVERSE” )
Operating range: from 0.0 to 100 (180°F)
Default: P27 = 2.0 (3.6°F)
Note: if the controlled parameter has almost restored its normal values but is still beyond its high or low thresholds, you can cancel the
alarm indication pressing . In order not to reset alarms automatically, give P27 a very high value.
P28: Time-delay before generating an alarm
P28 allows you to set a time-delay before the activation of Low/High (temperature, pressure) alarms after the P25 or P26 threshold has
been exceeded. It can also be applied to external alarms.
Access:
Keypad: if C50=1, 3 or 4 Ü press for 5”;
if C50=0 or 2 Ü the parameter can only be displayed..
Remote control: if C50=0, 1 or 4 Ü direct access pressing “ENABLE” and, after that, the dedicated buttons;
if C50=2 or 3 Ü the parameter can only be displayed.
Operating range: from 0 to 999 seconds.
Default: P28 = 1 s.
Note: if the controlled variable returns above the Low threshold alarm P25 or below the High alarm threshold P26 or if the external
alarm signal returns to normal values before the time-delay has passed, no alarm will be generated.

Carel FCM0002000 Specifications

General

Brand	Carel
Model	FCM0002000
Category	Controller
Language	English