27
EN
TECHNICAL MANUAL - B CLASSIC / B FUTURA / S CLASSIC
ALARMS
LCD A 112 Indication Alarm description Effect / Symptom
PT2 SHORT-CIRCUITED
Steam generator temperature
sensor PT2 short-circuited.
Control system detects a short circuit in PT2 and its
wiring.
Possible causes / Checks Solution
Problem with PT2 wiring –
check wiring.
Check condition of PT2 wiring paying special attention to electronic card connector.
Problem with PT2 sensor –
check sensor.
Check PT2 resistance.
Change sensor PT2 - see technical datasheet ST01 - STEAM GENERATOR.
LCD A 113 Indication Alarm description Effect / Symptom
PT3 SHORT-CIRCUITED
Temperature sensor PT3 of
chamber tube bundle heating
element short-circuited.
Control system detects a short circuit in PT3 and its
wiring.
Possible causes / Checks Solution
Problem with PT3 wiring –
check wiring.
Check condition of PT3 wiring paying special attention to electronic card connector.
Problem with PT3 sensor –
check sensor.
Check PT3 resistance.
Change sensor PT3.
LCD A 115 Indication Alarm description Effect / Symptom
PT5 SHORT-CIRCUITED
Temperature sensor PT5 for
conductivity sensor measurement
compensation short-circuited.
Control system detects a short circuit in PT5 and
its wiring.
Possible causes / Checks Solution
Problem with PT5 wiring –
check wiring.
Check condition of conductivity sensor wiring paying special attention to electronic
card connector.
Problem with PT5 sensor –
check sensor.
Measure resistance.
Change conductivity sensor.
LCD A 116 Indication Alarm description Effect / Symptom
ADC ERROR
ADC error - ADC timeout
exceeded.
ADC timeout with N conversion attempts greater
than 5.
Possible causes / Checks Solution
ADC failed Change electronic card.
LCD A 120 Indication Alarm description Effect / Symptom
REFERENCE HEATING
ELEMENT FAULT
Reference heating element
acquisition chain fault.
Control system detects a problem with reference
heating elements for automatic sensor calibration.
Possible causes / Checks Solution
Check R143 resistance on
electronic card.
Change electronic card.
LCD A 121 Indication Alarm description Effect / Symptom
REFERENCE HEATING
ELEMENT FAULT
Reference heating element
acquisition chain fault.
Autocalibration reference heating element does not
complete sequence.
Possible causes / Checks Solution
Short R143 reference
heating element to check it.
Change electronic card.
LCD A 122 Indication Alarm description Effect / Symptom
REFERENCE HEATING
ELEMENT FAULT
Reference heating element
acquisition chain fault.
Autocalibration reference heating element does not
complete sequence.
Possible causes / Checks Solution
Check R142 resistance on
electronic card.
Change electronic card.
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