Haier 43

Critical

MRV5 IIS (Digitalanzeige-Code) — Discharge superheat (TdSH) too low protection for 5 consecutive minutes.

Haier 43: Discharge superheat (TdSH) too low protection for 5 consecutive minutes. This fault typically halts operation and needs immediate attention.

Possible causes

Refrigerant overcharge or liquid flood-back to the compressor.

Check steps

Check refrigerant charge and EEV operation.

Affected parts

Kältemittel
EEV

Safety note

—

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

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

Look up in Enthalio →

Related fault codes

Compression ratio too high (>12.0) for 5 co39-1 Electronic expansion valve A (LEVa) over curre51-0 Electronic expansion valve B (LEVb) over curre51-2 Electronic expansion valve A (LEVa) circuit op52-0 Electronic expansion valve B (LEVb) circuit op52-2 CT current too low or current sensor failure a64