Carel LSA

Critical

MPXPRO — Low suction temperature alarm

Carel LSA: Low suction temperature alarm This fault typically halts operation and needs immediate attention.

Possible causes

Iced-up evaporator or refrigerant shortage
Threshold P11 set too high for the application

Check steps

Check evaporator for ice build-up, verify defrost cycles
Check refrigerant charge and suction temperature with gauges

Affected parts

evaporator
suction line temperature probe
solenoid valve

Safety note

Refrigerant circuit is pressurized - depressurize and disconnect mains power before servicing

Source: Carel resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Carel MPXPRO/Heos electronic controller user manual, official Carel PDF (+0300078EN, rel.1.5, hosted at mce.carel.com — content matches the MPXPRO controller family described in +0300055EN rel.1.6), §6.10 "LSA - Low suction temperature" and Table of Alarms: "LSA | Low suction temperature alarm (*)". Exact quote fro…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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