Mitsubishi Electric PUHZ error codes
Codes
- EBError codeMiswiring of Interface unit/Flow temp. controller-outdoor unit connecting wire (converse wiring or disconnection) Outdoor controller circuit board can automatically set the unit number of Interface unit/Flow temp. controller. Abnormal if the Interface unit/Flow temp. controller number cannot be set within 4 minutes after power on because of miswiring (converse wiring or disconnection) of Interface unit/Flow temp. controller-outdoor unit connecting wire.
- ECError codeStart-up time over The unit can not finish start-up process within four minutes after power on.
- EDError codeSerial communication error 1.Abnormal if serial communication between outdoor controller circuit board and outdoor power circuit board is defective. 2. Abnormal if communication between outdoor controller circuit board and M-NET board is not available.
- EEError codeReverse connection of ATA/ATW communication wire Abnormal if communication wire of ATA side and FTC side are connected in reverse.
- EFError code(6607 6608): path for three minutes. Non defined error code This code is displayed when non defined error code is received.
- F3Error code— 63L connector open Abnormal if 63L connector circuit is open for 3 minutes continuously from being switched on. 63L: Low-pressure switch
- F5Error code— 63H connector open Abnormal if 63H connector circuit is open for 3 minutes continuously after power supply. 63H: High-pressure switch
- F9Error code2 connector open Abnormal if both 63H and circuits are open for 3 minutes from being switched on. 63H: High-pressure switch 63L: Low-pressure switch
- P1Error codethermistor (TH1) The unit is in three-minute resume 1 prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after three minutes. (The unit returns to normal operation, if it has normally reset.) Constantly detected during cooling, 2 drying, and heating operation. Short: 90: or more Open: -40: or less
- P2Error codeAbnormality of pipe temperature thermistor/Liquid (TH2) The unit is in three-minute resume 1 prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after three minutes. (The unit returns to normal operation, if it has normally reset.) Constantly detected during cooling, 2 drying, and heating (except defrosting) operation.
- P4Error codeAbnormality of drain sensor (DS) Suspensive abnormality, if short/open of 1 thermistor is detected for 30 seconds continuously. Put off compressor and indoor fan. (The unit returns to normal operation, if it has normally reset.) Detect the following condition. 3 • During cooling and drying operation. • In case that pipe <liquid> temperature - room temperature <-10deg (Except defrosting) • When pipe <liquid> tempe
- P5Error codeMalfunction of drain pump (DP) Suspensive abnormality, if thermistor of 1 drain sensor is let heat itself and temperature rises slightly. Put off compressor and indoor fan. Constantly detected during drain pomp 3 operation.
- P6Error code
- P8Error codeAbnormal if communication between 2 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
- P9Error code2 11-4. TROUBLESHOOTING Phenomena 1. Remote controller work. 2. “PLEASE WAIT” on the remote: -18 -17 Tcond SW75 SW100/120 tank temperature thermistor The unit is 3-minute resume tion mode if short/open of detected. Abnormal if the reset normally after 3 minutes. returns to normal operation, reset normally) Constantly detected during heating, heating ECO, anti hot water operation. display does not 1 2 display is remained 1 controller. 2 3 4 controller 1 After cancelling OPERATION controller, it will be be not wireless 1The pair beep is heard controller start operatis indicated wireless 1
- PEError code3. Thermistor 9-4. HOW PUHZ-W50VHA(-BS) PUHZ-W85VHA(-BS) PUHZ-HW112YHA(-BS) PUHZ-HW140YHA(-BS) PUHZ-HW140VHA2(-BS) TH3: Liquid pipe TH4: Discharge TH6: Plate Hex TH7: Ambient TH8: Heatsink TH32: Inlet water TH33: Comp. (W50VHA(R1,R2), Suction pipe TH34: Comp. (HW•HA2R3) Fan motor (MF1) Solenoid valve <Four-way valve> (21S4) Compressor (MC) Linear expansion (LEV-A) (LEV-B) <except HW•HA2R3 models> M Solenoid valve <Bypass valve> (SV) W50,85: water Cooling During TH32 < Heating During TH32 < Defrosting During TH32 < TH32: TO CHECK Parts temp. temp. liquid temp. temp. temp. surface W85VHAR1) temp. (HW112,140) surface coil valve (LEV-C) <HW•HA2R3 Gray 1 2 Orange 3 Red 4 Yellow 5 Black 6 coil method · High voltage · Do not (It may check fuse board. Is the fuse contact contact (CNF2) Is POINT Is the fan TO CHECK feature <Liquid <Plate <Ambient> <Suction 15k' = 3480 ± 273+t <Heatsink> = 17k' 4150 ± 273+t <Discharge <Comp. <Comp. = 4057 ±
- PLError codeAbnormal refrigerant circuit During Cooling, Dry, or Auto Cooling operation, when the following are regarded as failures when detected for one second. a) The compressor continues to run for 30 or more seconds. b) The liquid pipe temperature or the condense/evaporator temperature is 75°C or more. * These detected errors will not be cancelled until the power source is reset. OF PROBLEMS Factor does not DC12V is not supplied 1 (Power supply display DC12~15V is supplied 2 no display is indicated. •
- U1Error codeHigh pressure (High-pressure switch 63H operated) Abnormal if high-pressure switch 63H (RP35-200)/63H1 or 63H2 (RP250) operated ( ) during compressor operation. w RP35-140 (63H) : 4.15 MPa w RP200 (63H) : 3.6 MPa RP250 (63H1) : 4.15 MPa (63H2) : 3.6 MPa 63H, 63H1, 63H2: High-pressure switch
- U2Error codeHigh discharging temperature (1) Abnormal if discharge temperature 125: thermistor (TH4) exceeds or 110: continuously for 5 minutes. Abnormal if discharge temperature thermistor (TH4) exceeds 110: or more continuously for 30 seconds after 90 seconds have passed since the defrosting operation started. (2) Abnormal if discharge superheat (Cooling: TH4 – T63HS / Heating: TH4 – T63HS) 70: exceeds continuously for 10 minutes. High comp. surface temperature Abnormal if comp. surface temperature 125:.
- U3Error code(TH4:5104) (TH33:5132): • When discharge superheat is less than 70:. • When the TH6 temp is more than the value obtained by TH7 – 5:. • When the condensing temp of TH5 is less than 35:. <Condition B> • During compressor operation (Cooling and Heating) • When discharge superheat is less than 80: in Cooling. • When discharge superheat is less than 90: in Heating. • When condensing temp of TH6 is more than−40:. (In Cooling only.) (3) Abnormal if comp. surface temperature thermistor (TH33) exceeds 125°C or 110°C continuous
- U4Error code(PAC-SK52ST) (Refer to 9-10.) Heatsink thermistor(TH8) is in the power module. Thermistors Symbol TH3,TH32
- U5Error codeSymbol TH3 Thermistor TH6 Thermistor Thermistor TH7 TH8 Thermistor <Heatsink> TH8 Internal thermistor Temperature of heatsink Abnormal if heatsink thermistor (TH8) detects temperature indicated below. ZRP35/50/60····································· 84: ZRP71··············································· 77: ZRP100V, 100Y································ 94: ZRP125/140V, 125/140Y·················· 95:
- U6Error codeCompressor overcurrent interruption (When compressor locked) Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating. Abnormality of power module Check abnormality by driving power module in case overcurrent is detected.
- U7Error codeToo low superheat due to low discharge temperature Abnormal if discharge superheat is continuously detected less than or equal to −15°C for 3 minutes even though linear expansion valve has minimum open pulse after compressor starts operating for 10 minutes. (ZRP100–140 only)
- U8Error codeOutdoor fan motor Abnormal if rotational frequency of the fan motor is not detected during DC fan motor operation. Fan motor rotational frequency is abnormal if; 100 rpm or below detected continuously • for 15 seconds at 20: or more outside air temperature. 50 rpm or below or 1500 rpm or more • detected continuously for 1 minute.
- U9Error code01 02 04 08 | Detailed PFC error (Overvoltage/ codes Undervoltage/Overcurrent) • PFC detected any of the followings a) Increase of DC bus voltage to 420V.
- UDError code(P100-140V models only) 20 Overheat protection Abnormal if outdoor pipe thermistor (TH3) 70: detects or more during compressor operation.
- UEError codeT63HS: Condensing temperature of pressure sensor (63HS) Thermistor TH3: Liquid temperature TH32: Inlet water temperature TH6: Plate HEX Liquid temperature TH7: Ambient temperature Abnormal pressure of pressure sensor (63HS) Abnormal if pressure sensor (63HS) detects 0.1 MPa or less. Detection is inoperative for 3 minutes after compressor starting and 3 minutes after and during defrosting.
- 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 or input current error ·Abnormal if current sensor detects –1.0 A to 1.0 A during compressor operation. (This error is ignored during test run.) Compressor overcurrent interruption Abnormal if overcurrent DC bus or compressor is detected after compressor starts operating for 30 seconds.
- ULError codeLow pressure (63L operated) Abnormal if 63L is operated (under -0.03 MPa) during compressor operation. 63L: Low-pressure switch Compressor overcurrent interruption Abnormal if overcurrent DC bus or compressor is detected after compressor starts operating for 30 seconds.
- UPError codeThermistor TH3: Outdoor liquid pipe temperature TH4: Discharge temperature TH5: Indoor cond./eva. temperature TH6: Outdoor 2-phase pipe temperature TH7: Outdoor temperature Compressor overcurrent interruption Abnormal if overcurrent DC bus or compressor is detected after compressor starts operating for 30 seconds.