Mitsubishi Electric PUZ error codes
Codes
- F3Error code— 63L connector open Abnormal if 63L connector circuit is open for 3 minutes continuously after power supply. 63L: Low pressure switch
- F5Error code63H connector Abnormal 3 minutes 63H: High
- F9Error code2 connector open Abnormal if both 63H and 63L connector circuits are open for 3 minutes continuously after power supply. 63H: High pressure switch 63L: Low pressure switch
- P6Error codeTcond stage-e stage-f stage-g 0 1 5 7 [−18] [−17] [−15] [−14] stage-a stage-b stage-c 145 144 142 ˚F Tcond 63 62 61 :
- P8Error code2. Abnormal if communication between outdoor controller circuit board and M-NET board is not available. Pipe temperature <Cooling mode> Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes after compressor start and 6 minutes after the liquid or condenser/evaporator pipe is out of cooling range. Note 1: It takes at least 9 minutes to detect. Note 2: Abnormality P8 is not detected in drying mode. Cooling range: Indoor pipe temperature (TH2 or TH5) − intake temperat
- PLError code<M-NET communication Check code: Abnormal refrigerant circuit During Cooling, Dry, or Auto Cooling operation, the following conditions are regarded as failures when detected for 1 second. a) The compressor continues to run for 30 or more seconds. b) The liquid pipe temperature or the condenser/evaporator temperature is 167˚F [75:] or more. These detected errors will not be cancelled until the power source is reset.
- U1Error codeHigh pressure (High pressure switch 63H operated) Abnormal if high pressure switch 63H (4.15MPa) operated during compressor operation. (ZM60-250) High compressor temperature (Thermal protector TRS operated) TRS(130°C) operated during compressor operation (ZM200-250)
- U2Error code(TH4: 1102) (TH33: 1132): High discharge temperature High comp. surface temperature (1) Abnormal if discharge temperature thermistor (TH4) exceeds 248˚F [120:] or 230˚F [110:] continuously for 5 minutes. Abnormal if condenser/evaporator temperature thermistor (TH5) exceeds 104˚F [40:] during defrosting and discharge temperature thermistor (TH4) exceeds 230˚F [110:]. (2) Abnormal if discharge superheat (Cooling: TH4−TH5 Heating: TH4−TH6) increases. All the conditions in A or B are detected simultaneously for 10 minutes co
- U3Error code
- U4Error code(TH3:5105) (TH6:5107) (TH7:5106) (TH8:5110): minutes after and during defrosting.) TH33: Thermistor <Comp. (PAC-SK52ST) (Refer to "10-10. FUNCTION OF SWITCHES, CO
- U5Parameter(PAC-SK52ST) (Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".) Thermistors Symbol Name T
- U6Error codePower module Check abnormality by driving power module in case overcurrent is detected. (UF or UP error condition)
- U7Error codeToo low superheat due to low discharge temperature Abnormal if discharge superheat is continuously detected less than or equal to 5˚F[−15˚C] for 3 minutes even though linear expansion valve has minimum open pulse after compressor starts operating for 10 minutes.
- U8Error codeDetailed: The outdoor fan motor is considered to be abnormal if the rotational frequency of fan motor is abnormal when detected during operation. Fan motor rotational frequency is abnormal if; • 100 rpm or below detected continuously for 15 seconds at 68˚F [20:] or more outside air temperature • 50 rpm or below or 1500 rpm or more detected continuously for 1 minute. To find out the detail history (latest) codes Refer to "10-10. FUNCTION OF SWITCHES, Overvoltage error • Increase in DC bus voltage to 400 V
- U9Error code01 02 04 08 | Detailed Undervoltage/Overcurrent) codes PFC detected any of the following: a) Increase of DC bus voltage to 430 V. c) Increase in input current 10 to 50 A peak.
- UDError code(UD)*: Over heat protection Abnormal if outdoor pipe thermistor (TH3) detects 70: or more during compressor operation.
- UEError codeAbnormal pressure of 63HS Abnormal if 63HS detects 14.5 PSIG [0.1 MPa] or less. Detection is inoperative for 3 minutes after compressor starting and 3 minutes after and during defrosting. 63HS: High pressure sensor
- UFError codeCompressor overcurrent interruption (When compressor locked) Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating.
- UHError codeCurrent sensor error • It is abnormal for 38A the input current or 10 seconds continuous 34A or more.
- ULError codeLow pressure Abnormal if the following conditions are detected for continuously 3 minutes after compressor starts heating operating for 10 minutes. 1. Heating mode Detection mode 1 TH7−TH3 4°C and [ TH5−Indoor room temperature 2°C [ Detection mode 2 TH7−TH3 2°C and [ TH5−Indoor room temperature [ 4°C and TH2−Indoor room temperature 4°C [ Detection mode 3 TH7−TH3 [ 4°C and TH5−Indoor room temperature 2°C [ and TH4−TH5 ] 20°C 2. Cooling mode TH6−TH7 2°C and [ TH3−TH7 [ 2°C and Indoor room temperat
- UPError codeCompressor overcurrent interruption Abnormal if overcurrent DC bus or compressor is detected after compressor starts operating for 30 seconds.