Bosch 1052

Low

Compress / Logamatic EMS plus — No communication with external room temperature sensor module (heating circuit 2) — the installer still has this module selected although it isn't fitted.

Bosch 1052: No communication with external room temperature sensor module (heating circuit 2) — the installer still has this module selected although it isn't fitted. This fault is usually minor, but points to an underlying cause.

Possible causes

Incorrect software setting: 'Ext. room temp. sensor' should be set to 'No'.

Check steps

Under Service menu → Set heating/cooling → Heating circ. 2 → set Ext. room temp. sensor to 'No'.

Affected parts

Verbindungsleitung/Bus
Klemmenblock
Steuerplatine
Temperaturfühler (NTC)
Anschlussstecker

Safety note

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Source: Bosch Alarm List A/W Split (8754), 2018-01-10, official Bosch heat pump alarm list (distributed via lvisawo.fi)

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

Look up in Enthalio →

Related fault codes

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