Mitsubishi Electric PUH error codes
Codes
- U1Error code63H: High-pressure switch Use current sensor to detect work or 8 return of 63H. • Abnormal if current detected phase (Vphase) is open phase after first compressor start-up after supplying the power by three phase power supply model. • When compressor is operating, compressor is suspended
- U2Error codeAbnormal high discharging temperature Abnormal if discharging temperature thermistor (TH4) exceeds following temperature during compressor operation. Normal operation: 115:(P71-P100)/ 125:(P125,P140) or more for three minutes continuously or 135: During defrosting: 135: | Abnormal shortage of refrigerant Abnormal if intake super heat exceeds following temperature during heating compressor operation. 70: or more, and indoor pipe <condenserevaporator> temperature (TH5) is 35: or less.
- U3Error code(Detection is inoperative for 5 minutes of compressor starting process and for 10 minutes after defrosting.)
- U4Error code(Detection is inoperative for 7 minutes after 10 seconds of compressor starting and for 10 minutes after defrosting.)
- U6Error codeCompressor over current (overload) breaking Abnormal if current value exceeds overload set value during compressor operation. P71V• 23.5A P71Y• 7.8A • • • • P100V• 28.5A P100Y• 9.4A • • • • P125Y• 12.6A P140Y• 15.6A • • • •
- UAError codeThermal relay (51C) worked Abnormal if 51C is open.
- UDError codeOver heat protection (over-load operation protection/abnormal fan) Abnormal if pipe thermistor detects the value that exceeds set value during compressor operation. P71-P140• 70: • •
- UEError codeAbnormal High pressure This error is detected (4.14MPa) from 63H action within 20 seconds of compressor starting in the first heating mode after power on. 63H: high-pressure switch
- UFError codeCompressor over current (start-up locked) breaking Abnormal if compressor current exceeds 1.2 times of overload set value.
- UHError codeCurrent sensor error Abnormal if compressor current is not detected on first compressor start-up after power supply is turned on.
- ULError codeAbnormal low pressure (63L worked) Abnormal if connector (63L) is open (under0.03MPa) during compressor operation.