Carel PJ32S - CAREL PJ32 Alarms, Errors, and Troubleshooting; PJ32 Anomalous Operating Conditions and Alarms; PJ32 Signal and Alarm Code Explanations

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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;
• 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 and de-energises the relay, while the alarm code and red LED go off only when the
cause of the alarm no longer exists. The alarm codes are shown in the following table:
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(
active probe control error all
(
not active defrost probe error all except S and X
,$
active
external alarm immediate or delayed by $
all, if the digital input is present
/
active low temperature alarm all
+,
active high temperature alarm all
((
not active data error all
(G
not active end defrost for time-out all except PJ32S
G)
not active defrost in progress all
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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.
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control probe error:
• probe not working: the probe signal is interrupted or short-circuited;
• probe not compatible with the instrument;
The alarm signal ( 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.
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evaporator probe or food storage probe error:
• probe not working, the probe signal is interrupted or short-circuited;
• probe not compatible with the instrument;
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alarm from multifunction digital input, immediate or delayed:
• check the multifunction input and the parameters $ and $ .
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low temperature alarm. The probe has read a temperature which is lower than the set by a value greater than parameter $/ :
• check the parameters $/ , $G and $ .
The alarm is automatically reset when the temperature returns within the set limits (see parameter $/ ).
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high temperature alarm. The probe has read a temperature which is higher than the set by a value greater than parameter $+ .
• check the parameters $+ , $G and $ .
The alarm is automatically reset when the temperature returns within the set limits (see parameter $+ ).
This alarm can be also be activated by the HACCP module; for a description see the corresponding chapter.