Error code
Mitsubishi Electric SUZ code U2
No approved translation for this record yet; showing the original text.
Meaning
(TH4: 1102) (TH33: 1132) (refrigerant shortage: 1501): High discharge temperature (1) Abnormal if TH4 exceeds 257°F [125°C] or 230°F [110°C] continuously for 5 minutes. Abnormal if TH4 exceeds 230°F [110°C] or more continuously for 30 seconds after 90 seconds have passed since the defrosting operation started. (2) Abnormal if discharge superheat (Cooling: [Higher temperature of TH4 orTH33]−TH6 / Heating: [Higher temperature of TH4 or TH33]−TH5) exceeds 176°F [80°C] continuously for 10 minutes. Note: TH4: Thermistor <Discharge> High comp. surface tem
Member details
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View details as a memberPossible causes
Disconnection or contact failure of connector (63H) on outdoor controller board Disconnection or contact failure of 63H connection Defective outdoor controller board Defective action of linear expansion valve Malfunction of fan driving circuit Overheated compressor operation caused by shortage of refrigerant Defective operation of stop valve Defective thermistor Defective outdoor controller board Defective action of linear expansion valve Clogging with foreign objects in refrigerant circuit Clogging occur in the parts which become below freezing point when water enters in refrigerant circuit. In the case of the unit does not restart: Detection temp. of thermistor (TH33) ] 203°F [95°C]
Solution
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