Haier 52-0

Critical

MRV5 IIS (Digitalanzeige-Code) — Electronic expansion valve A (LEVa) circuit open failure — driver chip detection.

Haier 52-0: Electronic expansion valve A (LEVa) circuit open failure — driver chip detection. This fault typically halts operation and needs immediate attention.

Possible causes

EEV coil or wiring broken.

Check steps

Check EEV wiring and coil resistance.

Affected parts

EEV-Spule A

Safety note

Isolate power before testing.

Source: Haier Service Manual MRV5 IIS Mini-Außengeräte (SYJS-06-2021 REV.A), §17 Failure Code — Inverter Outdoor Unit Failure Code table, p.57ff

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Related fault codes

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