Haier 51-0

Critical

MRV5 IIS (Digitalanzeige-Code) — Electronic expansion valve A (LEVa) over current — driver chip detection.

Haier 51-0: Electronic expansion valve A (LEVa) over current — driver chip detection. This fault typically halts operation and needs immediate attention.

Possible causes

EEV coil shorted or driver chip faulty.

Check steps

Measure EEV coil resistance, check driver board.

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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