{"id":4815,"date":"2025-11-03T22:41:09","date_gmt":"2025-11-03T13:41:09","guid":{"rendered":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.helpling.com.sg\/?p=4815"},"modified":"2026-09-10T22:03:55","modified_gmt":"2026-09-10T13:03:55","slug":"mitsubishi-aircon-error-codes","status":"publish","type":"post","link":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.helpling.com.sg\/mitsubishi-aircon-error-codes","title":{"rendered":"The Mitsubishi Aircon Error Codes"},"content":{"rendered":"

Mitsubishi air conditioners are among the most reliable cooling systems in Singapore homes. However, like all electronic appliances, they occasionally display error codes when something goes wrong.\u00a0<\/span><\/p>\n

Understanding these codes helps you identify whether it’s a simple fix or requires professional intervention.\u00a0<\/span><\/p>\n

Here’s a comprehensive guide to the most common Mitsubishi aircon error codes encountered by Singapore residents.<\/span><\/p>\n

Mitsubishi Aircon Error Codes Table<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Error Code<\/b><\/td>\nDescription<\/b><\/td>\nPossible Cause<\/b><\/td>\nSeverity<\/b><\/td>\n<\/tr>\n
E1<\/b><\/td>\nPCB board communication error<\/span><\/td>\nFaulty connection between indoor and outdoor units, damaged wiring<\/span><\/td>\nHigh<\/span><\/td>\n<\/tr>\n
E3<\/b><\/td>\nHigh pressure protection<\/span><\/td>\nRefrigerant overcharge, blocked condenser, outdoor unit overheating<\/span><\/td>\nHigh<\/span><\/td>\n<\/tr>\n
E5<\/b><\/td>\nCompressor overload<\/span><\/td>\nLow voltage, compressor failure, refrigerant issues<\/span><\/td>\nHigh<\/span><\/td>\n<\/tr>\n
E6<\/b><\/td>\nOutdoor unit communication error<\/span><\/td>\nWiring problems, PCB malfunction, loose connections<\/span><\/td>\nHigh<\/span><\/td>\n<\/tr>\n
E7<\/b><\/td>\nIndoor\/outdoor unit mismatch<\/span><\/td>\nIncompatible units, incorrect installation<\/span><\/td>\nMedium<\/span><\/td>\n<\/tr>\n
PL<\/b><\/td>\nPower supply or PCB issue<\/span><\/td>\nVoltage fluctuations common in Singapore, faulty PCB board<\/span><\/td>\nHigh<\/span><\/td>\n<\/tr>\n
P1<\/b><\/td>\nFan motor problem<\/span><\/td>\nIndoor fan motor failure, capacitor issues<\/span><\/td>\nHigh<\/span><\/td>\n<\/tr>\n
P4<\/b><\/td>\nOutdoor temperature sensor malfunction<\/span><\/td>\nDamaged or disconnected sensor<\/span><\/td>\nMedium<\/span><\/td>\n<\/tr>\n
P5<\/b><\/td>\nIndoor temperature sensor fault<\/span><\/td>\nSensor failure, wiring disconnection<\/span><\/td>\nMedium<\/span><\/td>\n<\/tr>\n
P10\/P11<\/b><\/td>\nDrainage problem<\/span><\/td>\nBlocked drain pipe, faulty float switch, water leakage<\/span><\/td>\nMedium<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Understanding Error Severity<\/h3>\n

High Severity (E1, E3, E5, E6, PL, P1)<\/b>: <\/span><\/p>\n

These errors indicate critical system malfunctions requiring immediate professional attention. Continuing to operate your aircon with these codes can cause permanent compressor damage or complete system failure.<\/span><\/p>\n

Medium Severity (E7, P4, P5, P10\/P11)<\/b>: <\/span><\/p>\n

While not immediately dangerous, these issues affect cooling performance and efficiency. Prompt professional aircon servicing<\/a> prevents escalation to more serious problems.<\/span><\/p>\n

DIY Checks vs Professional Help<\/h3>\n

What You Can Try First:<\/b><\/p>\n