Carel plug-in PJ32C User Manual

plug-in
Cod. +030221881 rel. 1.5 - 26/10/10
36
7. ALARMS, TROUBLESHOOTING
7.1 Anomalous or special operating conditions
The instruments in the PJ32 series are able to automatically detect the main malfunctions with the consequent activation of the
following actions:
 the malfunction is signalled on the display with the corresponding alarm code. In particular, the instrument displays the alarm
code and the temperature read by the probe, alternating. In the case of more than one alarm, these are displayed in sequence:
 the red LED on the
button is ON or the graphic symbol (2) appears on the display;
 for some alarms the internal buzzer, if present, sounds;
 for the same alarms the alarm relay, if present and configured as an alarm output, is activated.
Pressing the
button silences the buzzer, while the red LED and the alarm relay go off only when the cause of the alarm no
longer exists. The alarm codes are shown in the following table:
alarm code buzzer and alarm relay alarm description models on which present
E0
active probe control error all
E1
not active defrost probe error all except S and X
IA
active
external alarm immediate or delayed by A7
all, if the digital input is present
L0
active low temperature alarm all
HI
active high temperature alarm all
EE
not active data error all
Ed
not active end defrost for time-out all except PJ32S
dF
not active defrost in progress all
Tab. 7.1.1
7.2 Description of the main signals and alarms
LED flashing
The activation of the corresponding function is delayed by a timer, on stand-by for an external trigger or inhibited by another
procedure in progress. For example, if a continuous cycle is in progress and a defrost is requested, the latter awaits the end of the
continuous cycle and the corresponding LED (defrost) flashes.
E0 on or flashing
control probe error:
 probe not working: the probe signal is interrupted or short-circuited;
 probe not compatible with the instrument;
The alarm signal E0 stays on if there is just one alarm present (the value of temperature is no longer displayed), while it flashes if
other alarms are present or the second probe is displayed.
E1 flashing
evaporator probe or food storage probe error:
 probe not working, the probe signal is interrupted or short-circuited;
 probe not compatible with the instrument;
IA flashing
alarm from multifunction digital input, immediate or delayed:
 check the multifunction input and the parameters A4 and A7.
L0 flashing
low temperature alarm. The probe has read a temperature which is lower than the set by a value greater than parameter AL:
 check the parameters AL, Ad and A0.
The alarm is automatically reset when the temperature returns within the set limits (see parameter AL).
HI flashing
high temperature alarm. The probe has read a temperature which is higher than the set by a value greater than parameter AH.
 check the parameters AH, Ad and A0.
The alarm is automatically reset when the temperature returns within the set limits (see parameter AH).
This alarm can be also be activated by the HACCP module; for a description see the corresponding chapter.

Carel plug-in PJ32C Specifications

General

Brand	Carel
Model	plug-in PJ32C
Category	Thermostat
Language	English