4250 Mitsubishi Electric — Compressor Fault / Overcurrent Protection
At a glance
- Severity
- FAULT STOP
- Domain
- HEAT_PUMP_SYSTEM
- Reference standard
- EN 60335-2-40 / IEC 60335-2-40
What it means
Compressor overcurrent protection tripped.
Probable causes
- Scroll compressor mechanically seized
- Windings with partial short circuit
- Inverter module faulty
- Persistent high condensing pressure
- Supply voltage unstable or unbalanced
Where to start
Measure winding insulation to ground (>1 MOhm). Is it sufficient?
Full guided diagnosis in the app
The diagnostic tree for this fault has 5 guided steps with measurements, checks and resolutions. You'll find it in HVACIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
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- 1300 — Low Pressure Alarm / Refrigerant Shortage
- 5105 — Outdoor Coil Sensor Fault / Evaporator Temperature Error
- 1102 — Discharge Temperature Too High
- 1102 — Capacity unbalance between circuits
- 1300 — Low Pressure Alarm / LP Lockout
- 1302 — High Pressure Alarm / HP Lockout
- 1302 — Sub-cooling fault / sottoraffreddamento anomalo
- 4250 — Compressor Overcurrent / Overload Protection